Data carrier, recording device and reading device

FIELD: engineering of data carrier, and of recording and reading devices, compatible with such a data carrier.

SUBSTANCE: each variant of aforementioned data carrier contains recording track, formed by a stream of recesses on the surface of carrier, data of recess represent information recorded on it, which contains main data and sub-code. In accordance to one of variants, information about physical characteristics of current data carrier is recorded in sub-code. In accordance to other variant, data carrier contains multiple individual reading/recording zones, physical characteristics of which are different, and each one of aforementioned zones contains zones for input, zones for program and ones for output, while in sub-code of input zone of each one of aforementioned zones, information about physical characteristics of appropriate individual reading/recording is recorded as well as information about starting position of input zone of next individual reading/recording zone. Each one of variants of recording device contains a certain device for determining physical characteristics of aforementioned data carrier by reading information about these from sub-code, and each variant of reading device contains aforementioned determining device and device for controlling reading.

EFFECT: increased quality of reading and writing of information.

6 cl, 94 dwg

 

1. The technical field to which the invention relates.

This invention relates to a recording medium, and recording device and reading device that is compatible with such recording media.

2. The level of technology

As the recording media known compact disc (CD). Developed and widely used in various types of CDs, such as digital audio CD (CD-DA), not rewritable CD (CD-ROM), recordable CD (CD-R), rewritable compact disc (CD-RW) and text CD-ROM (CD-TEXT), which all belong to the so-called family compact discs.

Digital audio CD and not a CD-rewritable disc are native only to read, while the recordable CD is only once recorded media using organic pigment to a recording layer and a rewritable CD is rewritable media using the technology of phase change.

These discs format CD recorded data, such as music, video and computer data, as well as track numbers, indexes and addresses as subcodes.

The track number is a number that represents part of the musical pieces (tracks). Indexes are blocks, which form a track, for example, blocks, kotoryeprodayut movement paths.

Addresses include the absolute addresses of consecutive values, covering the entire disk, and relative addresses in the blocks of the tracks (which are also called "programs", represented by blocks of parcels of musical works). In line with this, you can extract subcodes to identify the absolute address and the relative address in each position on the disk.

The address represented by the value of time, such as minute/second/frame. Thus, in CD format "time" can be synonymous with the provisions of (address), for example, "absolute time" corresponds to the "absolute address".

For example, in CD format subcode address presents a minute/second/frame, each has eight bits. Eight-bit address, represented as a binary-decimal code (BCD)can Express a range from 0 to 99. In line with this, "minute" can be marked from 0 to 99. However, "second" is inevitably expressed from 0 to 59, and "frame" is expressed from 0 to 74, as in CD format defined 75 frames, from frame 0 to frame 74.

In the inner part of the disk information is written to subcode, such as information in the table of contents (TOC). Information in the table of contents specifies the address representing the start and the duration of the track. The contents of the address (address type) can be ID manually is verified using the point information.

For example, if the point information specifies a special value, the information described in the corresponding frame of subcode specifies the start address of each track or the number of the first/last track instead of an absolute address or a relative address.

In disks with recording capability, such as a recordable CD (CD-R) and rewritable CD (CD-RW) track record established Vouliagmeni grooves. The wave shape of the grooves are formed by means of oscillation, based on information absolute addresses, and thus, the absolute address can be identified using the information in the grooves of lobularia. As subcodes are not written to disk without recorded data, the address information is read by means of grooving lobularia, when data is written.

In addition to the above discs format CD (the CD standard) developed disks with large capacity, high density, as well as disks that have multiple zones, physical characteristics are different, which is called "hybrid drives". Also increased the number of materials and configurations of disks.

In these conditions, to ensure sufficient quality of the writing and reading of recording devices and readers, it became necessary to optimize various settings in accordance with the physical'hara is the characteristics of the disc. For example, it is necessary to optimize the gain of the servo-system, the laser power and the range of access.

However, it is difficult to accurately determine the physical characteristics of individual drives installed in the recording device or reader. You need to do some calibration, when the drive is installed, but even in this case, it is difficult to specify physical characteristics of the disc. In addition, as the load increases due to the operations of calibration, it is also necessary to increase the number of hardware and software, and in addition, more time is required before write operations or read.

In line with this, there is a need for simple and accurate determination of the physical characteristics of disks without sacrificing compatibility with known disk format CD-ROM or by increasing the complexity of hardware and software used in the recording device and the reading device.

The invention

Thus, taking into account the above prior art, an objective of the invention is a simple and precise definition of the physical characteristics of the media, while ensuring compatibility with different types of media and store the attachment compatibility with known media.

To solve this problem, according to one aspect of the present invention, the created media, including recorded therein master data and subcode. Information about the physical characteristics of the media information recorded inside subcode.

Information points that represent the types of content specific information can be placed inside subcode, and information about the physical characteristics may be recorded in accordance with the specific values of the data point.

Information about the physical characteristics can be recorded inside subcode zone input.

Information about the physical characteristics may include information related to material type, line speed, step between tracks, the moment of inertia, configuration, or size of the media.

According to another aspect of the present invention, the created media for storing main data and subcode. The storage medium includes a number of individual zones of the read/write head, physical characteristics which are different with each individual zone of the read/write head consists of a zone input zone program and the zone output. In subcode zone input single zone of the read/write recorded characterizing information corresponding to a single zone of the read/write head, and the information of the start position of okazyvaetsya, where the zone begins enter the following single zone read/write.

In subcode zone input every single zone of the read/write can be written information provisions, indicating the position in which the end zone input corresponding to a single zone of the read/write.

According to another aspect of the present invention, the created recording device that is compatible with the storage medium, which stores basic information and subcode, and the information about the physical characteristics of the media information recorded inside subcode. The recording device includes a determining unit for determining the physical characteristics of the storage medium by reading information on the physical characteristics of subcode. The control unit performs recording settings for write operations in accordance with the physical characteristics defined by the determining unit, and then gives permission to perform write operations.

According to another aspect of the present invention, the created recording device that is compatible with the storage medium that stores main data and subcode, the storage medium includes a number of individual zones of the read/write head, the physical characteristics are different, and each individual area of the read/write and is the zone input zone program and the zone output. In subcode zone input every single zone of the read/write record information about the physical characteristics of the corresponding unit area of the read/write head and the start position information indicating a position where the injection zone following a single zone of the read/write. The recording device includes an access control block to determine the location of the input of the next unit area of the read/write head from the start position information recorded in the area of the input current of a single zone of the read/write head, and to provide access to the designated position. The determining unit reads the information about the physical characteristics of the zone input every single zone of the read/write head in accordance with the access controlled by access control block, and determines the physical characteristics of the isolated zone of the read/write. The control unit performs recording settings for write operations for each individual zone of the read/write head in accordance with the physical characteristics defined by the determining unit, and issues a command for allowing the recording operation.

According to another aspect of the present invention created a card reader that is compatible with the storage medium that stores master data is subcode, the information about the physical characteristics of the medium information recorded in subcode. The reader includes a determining unit for determining the physical characteristics of the storage medium by reading information on the physical characteristics of subcode. The control unit performs reading configuration for a read operation in accordance with the physical characteristics defined by the determining device, and issues a command for allowing the execution of read operations.

According to another aspect of the present invention created a card reader that is compatible with the storage medium that stores main data and subcode, the storage medium includes a number of individual zones of the read/write head, the physical characteristics are different, and each individual area of the read/write head consists of a zone input zone program and the zone output. In subcode zone input every single zone of the read/write record information about the physical characteristics of the corresponding unit area of the read/write head and the start position information indicating a position where the injection zone following a single zone of the read/write. The reader includes an access control block to determine the location of the zone enter the following dinitroethane recording/reading of information of the start position, recorded in the zone of the input current of a single zone of the read/write head, and to provide access to the designated position. The determining unit reads the information about the physical characteristics of the zone input every single zone of the read/write head in accordance with the access controlled by access control block, and determines the physical characteristics of the isolated zone of the read/write. The control unit performs reading settings for read operations for each individual zone of the read/write head in accordance with the physical characteristics defined by the determining unit, and issues a command for allowing the execution of read operations.

Thus, according to this invention, in subcode recorded physical characteristics of the media. By reading subcode recording device and reading device can simply and accurately determine the physical characteristics of the disk.

Thereby, it is possible to provide a configuration suitable for write operations and read operations, for example, the gain of the servo-system, the laser power, the form of the control oscillation laser, the range of optical access of the pulling tool, thus improving the quality of the recording and reading in accordance with the disk type.

While the physical characteristics of the media information the AI is not determined through calibration. Therefore, it is theoretically possible to determine with 100% accuracy and reduce the time required for start of write operations and read.

In addition, since information on physical characteristics is recorded in accordance with the specific values of the data points inside subcode, it may be retained compatibility with the known disc formats. Information about the physical characteristics recorded in subcode zone input, which is read first when the drive is installed that allows the recording device and the reader quickly and easily obtain information about the physical characteristics.

Information about the material of the storage medium is also included in information about the physical characteristics. Thus, it is possible to optimize various settings, such as laser power and forms of control of the laser oscillation, in accordance with the material.

Because information about the physical characteristics include information about the media type, the linear velocity and the step between tracks, you can easily configure a servo system for write/read and easy to determine the disk type.

Information about the moment of inertia and the configuration information/the size of the disk contains information about the physical characteristics. In line with this, you can exactly what in order to configure the gain of the servo-system drive and a range of optical access of the pulling tool.

As for the disk having a number of individual zones (hybrid drive), physical characteristics are different, it is easy to provide access from the zone input one single zone input the subsequent a single zone. In line with this, the recording device or the reader is able to quickly and easily read information about the physical characteristics of each unit area that can be used for settings for subsequent write operations or read. Thus, it is possible to perform optimal settings in accordance with the physical characteristics of each individual zone, thereby increasing the quality of the recording and reading.

In subcode every single area of the recorded information about the position of the end zone output corresponding to a single zone. Accordingly, it is possible to accurately determine any gap between the zone output corresponding to a single zone and the zone of injection of the subsequent unit area.

Brief description of drawings

The figures shown:

figa-1D - drive types, according to a variant implementation of the present invention;

figure 2 - disc standard-density and high-density disk, according to a variant implementation;

figa-3S - drive types, according to a variant implementation of the present invention;

figa-4C - types of hybrid drives, under option done the of the present invention;

figa-5V - types of hybrid drives, according to a variant implementation of the present invention;

6 is a layout of a recordable CD-ROM or rewritable CD-ROM;

Fig.7 - woolerina groove;

Fig - encoding ATIP;

figures 9 and 10 mode shapes ATIP;

11 - ATIP frame used in an embodiment of the present invention;

Fig - the content of the ATIP frame used in an embodiment of the present invention;

Fig - parts of the frame ATIP shown in Fig;

Fig - data about the material contained in information lobularia shown in Fig;

Fig - density data disk contained in the information lobularia shown in Fig;

Fig data about the physical structure contained in the information lobularia shown in Fig;

Fig data about hardware disk configuration information contained in lobularia shown in Fig;

figa and 18V - round discs, presents data on the disk configuration shown in Fig;

figa and 19C - triangular disks, presents data on the disk configuration shown in Fig;

figa, 20B and 20C rectangular disks, presents data on the disk configuration shown in Fig;

figa and 21B data about the size of the disk contained in the information lobularia shown in Fig;

Fig - sample data is omenta of inertia of the disk, contained in the information lobularia shown in Fig;

Fig is another example of data on the moment of inertia of the disk contained in the information shown on Fig;

Fig - format recording area;

Fig - track format;

Fig - disc format, including the fixed-length packets;

Fig - frame structure of the disk according to a variant implementation of the present invention;

figa and 28V - frame subcode drive, according to a variant implementation of the present invention;

figa and 29B is an example of data sub-Q disk according to a variant implementation of the present invention;

figa and 30V is another example of the data sub-Q disk according to a variant implementation of the present invention;

Fig - structure table of contents (TOC) of the disc, according to a variant implementation of the present invention;

Fig - example of the content data sub-Q disk according to a variant implementation of the present invention;

Fig is an example of the dimensions of the disk contained in the data sub-Q, used in an embodiment of the present invention;

Fig is an example of configuration information of the disk contained in the data sub-Q, used in an embodiment of the present invention;

Fig - example information about the moment of inertia of the disk contained in the data sub-Q, used in an embodiment of the present invention;

Fig - example information about the step between tracks, the content is awasa in the data sub-Q, used in an embodiment of the present invention;

Fig - example information about the linear speed of the data sub-Q, used in an embodiment of the present invention;

Fig - example information about the media type contained in the data sub-Q, used in an embodiment of the present invention;

Fig - example information about the type of material contained in these sub-Q, used in an embodiment of the present invention;

Fig is another example of the content data sub-Q disk used in the embodiment of the present invention;

Fig is another example of the configuration information/the size of the disk contained in the data sub-Q, used in an embodiment of the present invention;

Fig is another example of information about the step between tracks contained in the data sub-Q, used in an embodiment of the present invention;

Fig is another example of information about the linear velocity of the data sub-Q, used in an embodiment of the present invention;

Fig - another example of the version information of the media contained in the data sub-Q, used in an embodiment of the present invention;

Fig is another example of information about the media type contained in the data sub-Q, used in an embodiment of the present invention;

Fig - content data sub-Q drive is, used in an embodiment of the present invention;

figa and 47B - implementation of access, according to the data content sub-Q disk shown in Fig;

Fig - block diagram block of the disk drive, according to a variant implementation of the present invention;

Fig and 50 - graphical layout of a data processing program that is executed by the drive unit of the disk when the disk is installed, according to a variant implementation of the present invention;

Fig - graphic scheme of the setup performed by the unit of the disk drive, according to a variant implementation of the present invention;

Fig is a graphical diagram of the recording program executed by the block of the disk drive, according to a variant implementation of the present invention;

figa and V - logarithmic amplitude-frequency and phase-frequency characteristics of the open loop control to adjust the moment of inertia used in an embodiment of the present invention;

Fig the control pulses of the laser used in the embodiment of the present invention;

Fig - layout digital video disc rewritable (DVD-RW) or digital video disc write-once (DVD-R);

Fig - preliminary excavation at the site;

figa, 57B and S - data structure formed preliminary excavations at the site;

Fig - field identification data, images is the R preliminary excavations at the site;

Fig - block structure preliminary excavations at the site;

figa and 60V - information about the physical characteristics recorded in the preliminary excavation at the site;

Fig - layout digital video disc with the possibility of multiple recording (DVD-RAM);

Fig - zone structure of the input digital video disc with the possibility of multiple accounts;

Fig - block structure zone management data digital video disc with the possibility of multiple accounts;

Fig - content information about the physical format, according to a variant implementation of the present invention;

Fig is a piece of information about the physical format shown on Fig;

figa, V and S - phase modulation blocks ADIP of DVD+RW;

Fig - block ADIP of DVD+RW;

figa and V - word structure ADIP of DVD+RW;

figa and V - information about the physical format to be written in the ADIP word, according to a variant implementation of the invention.

Description of the preferred embodiments

Below is a detailed description of the invention with reference to the accompanying drawings, illustrating preferred embodiments of the.

Disks created in the form of media, according to this invention, and the disk drive units created in the form of a recording device and reading device according to the invention described which are below in the following order:

1. Overview of signal processing in the system CD-ROM drive

2. Types CD

3. Disks with recording capability and groove

3.1. Disks rewritable

3.2. Information lobularia

3.3. The format of the recording area

4. Subcode and the table of contents

5. The configuration of the actuator disk

6. Examples of the signal processing unit of the disk drive

7. Examples of a DVD (multi-purpose digital disk).

7.1. DVD-RW, DVD-R

7.2. DVD-RAM

7.3. DVD+RW

1. Overview of the signal processing system CD

Below is a description of the signal processing system volumes CD, such as digital audio CD (CD-DA), not rewritable CD (CD-ROM), recordable CD (CD-R) and rewritable CD (CD-RW).

The signal processing system CD and, in particular, the operation of recording stereo sound on the disc is as follows.

Audio signals in the left and right channels (L-Ch and R-Ch) is discretized with a sampling frequency of 44.1 kHz and then linearly quantizers sixteen bits. Sixteen bits of data of the audio signal is defined as one word and additionally divided into data blocks of eight bits, and each information of eight bits is defined as a single character (one character is eight bits and is equal to 1/2 of the word).

He distinguishes six samples for each channel, so what. 16 bit × 2ch × 6 samples = 192 bits = 24 symbols, and to 24 characters added four symbol error correction code (ECC) as a Q-parity with getting 28 characters. In the system CD as error correction code are created and added codes reed-Solomon. To eliminate the defects of continuous packets on the substrate disk audio signal from 28 characters peremeshivayte (rearrange).

Then to the sound signal of the 28 characters add another 4 character codes reed-Solomon (R-parity) to obtain 32 characters, which add another symbol for operations management (subcode). The received signal is subjected to EFM-modulation (modulation eight to fourteen). In accordance with the EFM-modulated eight bits extend to fourteen bits.

In accordance with the EFM modulation quantitively signal of 16 bits is divided into an upper eight bits and lower eight bits, the signal of eight bits is defined as the smallest unit and is converted into a signal of 14 bits. In this case, the smallest number of consecutive bits is three, and the greatest number of consecutive bits equal to eleven, i.e. from 2 to 10 zeros are inserted between the units. After conversion "1" represents the inversion of polarity (record no return to zero inverted (NRZ-I).

In accordance with the EFM modulation signal of 8 bits of the conversions is carried out in the signal of 14 bits, in which are inserted 2-10 zeros between ones and there are three connecting bits to perform the conditions that at least two zeros are inserted between adjacent units of characters. Accordingly, the signals from the EFM-modulated, i.e. in the flow of the data being written, there are three types of length in the range between the minimum length (in time) Tmin=3T(0.9 NS) and maximum length (in time) Tmax=11T(3,3 NS).

To the data (frame) with EFM-modulation is added to the frame synchronization signal and the control signal, which form the subcodes, and the received data stream recorded on the disc. The synchronization signal frames and subcode will be described in detail below.

Conversely, when reading the stream data recorded above image, decode it in the reverse order of processing when recording. Thus, perform EFM-demodulation of the data stream read from the disc, and then make the correction, ordering, and separation channels. Then the left and right audio signals, quantityrange sixteen bits and sampled with a frequency of 44.1 kHz is converted into analog signals, which are fed to the output as stereo music signals.

2. Types CD

Below is a description of drives used as a CD, in this embodiment, with reference to figa-5V.

On figa-1D schematically shows the types of discs based on density recording. Namely, figa shows a known disk with the standard recording density. In this example, the entire dick recorded with the standard recording density. Currently used disks, such as digital audio CD, not a rewritable compact disk, recordable CD-ROM and rewritable CD-ROM, match the drive type.

On FIGU shows the high-density disk, which is developed recently, and in this case, the entire disk can be recorded with high density. For example, developed the drives with twice or three times higher density in comparison with the standard drive. In particular, it has developed made writable disks of high density, such as a writable CD-ROM and rewritable CD-ROM.

On figs shows a hybrid disc, the inner part of which is a zone of high density, and the outer part of which is a area of standard density. Conversely, fig.1D shows a hybrid disc, the outer part of which is a zone of high density, and the inner part of which is a area of standard density.

Characteristics/parameters of the standard disk-density and high-density disk shown in figure 2.

Regarding the capacity of the data uses the user (master data, subject entry) standard disk density has the ability to write 650 megabytes (for discs with a diameter of 12 cm) or 195 megabytes (for discs with diameter of 8 cm), while the disk high density recording capability has a 1.3 gigabytes (for discs with a diameter of 12 cm) or 0.4 gigabytes (for discs with diameter of 8 cm). Thus, high-density disk has a capacity that is twice the capacity of standard density.

The initial position (radius) area of application (zone in which the recorded user data) of the standard disk density is 50 mm from the center of the disc, and the initial position of the high-density disk - 48 mm from the center of the disk.

The step between tracks disc standard density (zone standard density) equal to 1.6 μm, while the pitch between the tracks of the high-density disk (areas of high density) equal to 1.1 microns.

The scanning speed of the standard disk density (zone standard density) is 1.2-1.4 m/s, while the scanning speed of the high-density disk (areas of high density) is equal to 0.9 m/s

Numerical aperture of the standard disk density (zone standard density) is 0.45, while the numerical aperture of the high-density disk (areas of high density) equal to 0.55 or 0.5.

With regard to error correction method for a disk of standard density (area standard is based density) used the method of cross-peremeshivaemogo code 4 reed-Solomon (CIRC4), while for high-density disk is used the method of cross-peremeshivaemogo code 7 reed-Solomon (CIRC7).

Other characteristics and parameters, in addition to the above, such as the size of the Central hole, the thickness of the disc, the laser wavelength, the modulation method are the same as for the standard disk density (zone standard density) and high-density disk (areas of high density), as shown in figure 2.

When the CD standard density, such as shown in figa, and high-density disk, such as shown in figv, is installed in the drive unit of the disk, block, disc, it is necessary to determine the disk type.

When a hybrid disc, such as shown in figs or fig.1D, is installed in the drive unit of the disk, block, disc, it is necessary to determine the zone type, i.e. whether the time zone that is currently recorded or from which data is read, the zone of high density or area of the standard density.

Thus, after determining the type of disc or the type of zone to change the settings of the read/write head in accordance with the parameters shown in figure 2.

On figa - 4C schematically shows the types of discs in accordance with the systems of the read/write data.

On figa shown is only intended to read the disk, such as digital is an audio CD (CD-DA) or a rewritable CD (CD-ROM), which is the drive on which all the data recorded in the form of extruded grooves.

On FIGU shows the disk for reading immediately after write (DRAW), such as recordable CD (CD-R). This disc DRAW a record layer formed of an organic pigment, and the data recorded using changes in pigment (change of refractive index caused by the irradiation of laser light. This disc DRAW is also called the drive for single entry and multiple-read-many (WORM), because it can be written only once.

On figs shows the disk rewritable using the technique of phase changes, such as a rewritable CD (CD-RW).

In the disk DRAW (WORM), shown in figv, and disk rewritable shown in figs, the track record is formed a spiral groove. In contrast, in the drive to read-only, shown in figa, the track record established by the flow of the extruded cut, not a flute.

As will be described in detail below, the grooves on the disc DRAW (WORM) are lobularia (meander) rewritable disc, which allows you to record information such as absolute addresses. Accordingly, when recording data tracking track carried out on the basis of lobularia grooves, and on the basis of data such as addresses, read with ibulrofen grooves (called in the following sometimes "information lobularia"), thus you can control the write operation.

In contrast, in the disc for reading the track record established in advance by the thread grooves, and data, such as addresses, write using subcodes. Thus, there is no need in these grooves. In line with this, some of the drive units for the drive to read-only is not provided with a function of reading information of the notch.

On figa, 4B and 4C shows the hybrid drives. Namely, figa shows the disk, the inner part of which is a area to read-only, while the outer part is an area for reading immediately after write (DRAW) (for single entry and multiple-read-many (WORM)). On FIGU shows the disk, the inner part of which is rewritable, and the outer zone which is a zone only for reading. On figs shows the disk, the inner part of which is a area for reading immediately after write (DRAW) (for single entry and multiple-read-many (WORM)), while the outer part is the area with the possibility of being overwritten.

In line with this, there is a hybrid drive, i.e. one disk having different areas, such as area to read-only zone DRAW (WORM) and the area with the possibility of being overwritten.

Hybrid drive may also have the ri zone, although this drive is not shown. For example, the hybrid drive can be an internal part, which is the area to read-only, an intermediate part, which is the area DRAW (WORM), and the outer part, which is the area with the possibility of rewriting, or hybrid drive can be an internal part, which is the area to read-only, an intermediate part, which is the area with the possibility of rewriting, and the outer part, which is the only zone read. It is also possible hybrid discs with four or more zones.

As mentioned above, the discs may vary in density recording or read/write, i.e. in terms of physical characteristics. Types of disks can be summarized as shown in figa and figv.

On figa describes types of conventional discs, i.e. discs formed of one area having at least one physical characteristic ("basic disk" means that the disc is a hybrid disc). Considering the fact that there are two types of density recording, such as a standard density and high density, and there are three types of read/write, such as the type to read-only, type DRAW (WORM), and type rewritable, there are six types, i.e. the type 1 - type 6 listed on figa.

On FIGU describes types of hybrid drives, each of which has two zones, the physical nature of the sticks are different. Using types 1-6 listed on figa possible 30 types of hybrid drives, the type HD1, the inner part of which is type 1 and the outer part - type 2 to type HD30, the inner part of which is type 6, and the outer portion of which is of type 5.

Obviously, if we consider hybrid discs, each of which has three or more zones, physical characteristics are different, then the possible number of types of disks.

In accordance with this many drives on their physical characteristics, the unit of the disk drive must accurately determine the physical characteristics of the disc (or the physical characteristics of the zone in which shall be recorded or from which to read data and perform processing in accordance with physical characteristics. Can then be increased as read/write.

Usually the disk is a carrier in the form of a disc. However, as will be shown below, the possible triangle "drive" and quadrangular "disk". Although such "drives" contrary to the representations of the form "disk", in this description, the media form that is different from the disk, also referred to as "disks".

3. Disks and grooves writable

3.1. Disks rewritable

Typically, the drive system CD has a single spiral track, start audouze from the center (inner periphery) of the disk and passing to the end (outer periphery) of the disk.

On the drive on which the user can write data, such as a writable CD-ROM or rewritable CD before writing data to the disk on the disk substrate is formed as a track guide groove for guiding the laser beam. When the disk affects the modulated laser beam of high power, reflectance or phase of the recording layer is changed, allowing the write data to the disk. In contrast, the groove as the track record is not physically perform on the disk to read-only, such as digital audio CD or not writable CD-ROM.

To a recordable CD (CD-R) formed layer for a single record, which consists of organic pigment. On the disk is affected by laser light of high power, which provides the possibility of recording data through the perforations of the disk (complete grooves on the disk).

In a rewritable disk such as a rewritable CD (CD-RW), a recording layer which can be repeatedly overwritten, for data recording technique using phase change, namely, the data record using the difference of reflectance between the crystalline state and an amorphous state.

With regard to physical characteristics, coefficie the t reflection CD-ROM and CD-R is 0.7 or more, while the reflection factor of CD-RW is smaller and is about 0.2. In line with this, the reading device designed for compatibility with the reflection coefficient of 0.7 or more, you cannot read CD-RW discs. Thus, in this reading device is added to the automatic regulation of the gain for amplifying small signals.

In the CD-ROM injection zone on the inner periphery of the disc is located at a distance of from 46 to 50 mm from the center of the disc, and closer to the center than the zone of injection, cut no.

In contrast, CD-R and CD-RW provides the area of program memory (RMA) and the calibration area power (PCA), which are located closer to the center than the zone of injection, as shown in Fig.6.

The injection zone and the next zone program, which is used to record user data, are used to perform write operations using the actuator disk is compatible with CD-R or CD-RW, as well as to read data from them, as in the case of CD-DA.

In the area of program memory temporarily stores information about the mode of the recording signal and the time of each track, such as the start time and end time. When all tracks are filled with recorded data in the zone input is formed by a table of contents based on the data stored in the memory area of the program. Area kalibrovki the power is a zone in which to temporarily store data with the aim of obtaining the optimum value of the laser power when data is written.

In CD-R and CD-RW to control the recording position and the rotation of the drive create a groove (guide groove), which is used for formation of the data track, with sabaliauskas (meander) form.

This track lobularia is generated based on the signal modulated by the information, such as absolute addresses. Thus, information lobularia, such as absolute addresses can be read from Vouliagmeni grooves. Information of absolute time (address), represented as sabaliauskas grooves, called "absolute time in pre-groove (ATIP)".

Woolerina groove slightly oscillates in a sinusoidal curve, as shown in Fig.7, while the Central frequency of the notch is equal to 22.05 kHz, and the value of lobularia approximately equal to ±0.3 microns.

In this embodiment, in Vouliagmeni groove encoded using frequency modulation not only information of absolute time, but also other types of information. Details information of lobularia provided sabaliauskas groove described below.

3-2. Information lobularia

In accordance with the information of lobularia found in anti-phase channel with grooves CD-R/CD-RW, when the rotation electr which the drive motor is adjusted the Central frequency information lobularia becomes equal to 22.05 kHz, the motor drive rotates at a linear speed that is specified in the system CD (for example, 1.2-1.4 m/s for the standard disk density).

In CD-DA or CD-ROM you can rely on the absolute time information encoded in subcode Q. However, in the CD-R or CD-RW that have no entries (blank discs), subcode not yet recorded, and therefore, the absolute time information obtained from the information lobularia.

One sector (sector ATIP) information lobularia equivalent to one sector of data (2352 bytes) of the main channel after data is written to disk. Thus, the write operation is performed while ensuring synchronization sector ATIP sector data.

The ATIP information is not encoded in itself information lobularia. Instead, it is first subjected to a push-pull modulation, as shown in Fig, and then phase modulation (frequency modulation). This is because the signal lobularia is also used to regulate the rotation of the motor drive. Namely, in accordance with the push-pull modulation, 1 and 0 are interleaved with the specified interval, so that the ratio of the number of ones and zeros is equal to 1:1, and the average frequency of the frequency-modulated signal lobularia becomes equal to 22.05 kHz.

As will be further decree is but below in information lobularia encode not only time, but also specific information, such as information for setting recording power of the laser. In CD-RW due to the expansion of special information encode information power and pulse recording to CD-RW.

Figure 11 shows the configuration of frame ATIP information lobularia.

The ATIP frame is formed of 42 bits, as shown at 11 in position (a), and sequentially supplied chetyrehmetrovoy synchronization group, trabeculum the discriminator (ID), information lobularia of 21 bits, such as the physical address of the frame, and a cyclic redundancy code (CRC) of 14 bits.

As an alternative solution, in some shots ATIP can be a discriminator of 4 bits and the information lobularia of 20 bits, as shown in figure 11 position (b).

As the clock located at the beginning of the ATIP frame, is provided "11100011"when the preceding bit is 0, as shown in Fig.9, or "00011101"when the preceding bit is 1, as shown in figure 10.

Consisting of 3 or 4 bits of the discriminator is an identifier indicating the content of the subsequent information lobularia of 20 or 21 bits, and sets, as shown in Fig.

Shown in Fig 24 bits bits from M23 to M0 correspond to the 24 bits in the bit position 5-28, is provided on 11.

Bits M23, M22 and M21 (or bits M23, M22, M21 and M20) are used for the discriminator. When the value of the discriminator is "000", then the information content of lobularia (M20-M0) for the corresponding frame specifies the address of the zone input zone program and the zone output. When the value of the discriminator is "100", then the information content of lobularia (M20-M0) for the corresponding frame specifies the address of the zone input. The above absolute addresses correspond to the addresses described above absolute time in pre-groove (ATIP). Information of the time interval is written as ATIP radially on the outside, starting from the beginning of the zone program, so it is simply to increment, and can be used to control address during a write operation.

When the value of the discriminator is "101", then the information content of lobularia (M20-M0) frame indicates special information 1. When the value of the discriminator is "110", the information content of lobularia (M20-M0) frame indicates special information 2. When the value of the discriminator is "111", then the information content of lobularia (M20-M0) frame represents special information 3.

When four bits are used for the discriminator and its value is "0010", the information content of lobularia (M19-M0) frame indicates special information 4.

When the value of the discriminator is "010", t is the information content of lobularia (M20-M0) frame specifies additional information 1. When the value of the discriminator is "011", then the information content of lobularia (M20-M0) frame specifies additional information 2. When four bits are used for the discriminator and its value is "0011", the information content of lobularia (M19-M0) frame indicates the added information. Values "1000" and "1001" discriminator reserved for copyright information, which is code copyright protection.

Contents special information 1-4, additional information 1 and 2 and supporting information shown on Fig.

Special information 1 includes a target recording power of 4 bits, the reference speed of 3 bits, the code of the application disk of 7 bits, the disc type of 1-bit and subtype disk of 3 bits. Reserve 3 bits is a reserve area for expansion in the future.

As the target recording power recorded level of the laser power at the reference speed. As a code to use disk write down the purpose of using, for example, for General business use, special use (for example, photo-CD or karaoke-CD) or for commercial recording. As the disc type, for example, "0" represents the drive DRAW (WORM), while "1" indicates that the disc is rewritable. The subtype of the disk represents a rotation speed and a constant angular velocity (CAV)/constant Lin is you velocity (CLV).

Special information 2 includes the address of the start zone input. Special information 3 includes a start address area output.

Special information 4 contains the code of the manufacturer, product type and material code. The name of the manufacturer of the disk is recorded as a manufacturer code. Product type (room type, product code, etc)produced by the manufacturer, is recorded as the type of product. Code material written material layer recording disk.

Details of the information material code of 3 bits is shown in Fig.

Material code "000" indicates that the material is tsianina. Material code "001" indicates that the material is a phthalocyanine. Material code "010" indicates that the material is uzasadnienie. The above materials are organic pigments for CD-R.

In contrast, material code "100" denotes a material for the media with phase change.

Typically, the material layer recording disk can be determined by using the code of the manufacturer and type of product. This is based on the system field of manufacturing of the medium in which products and materials are registered in correspondence with each other.

Thus, when storing the registered information in the block of the disk drive can be identified material layer recording disc code of the manufacturer and type ed is Leah.

However, if registered new disks, or if you are installing drives unregistered types of products or disks made of unregistered manufacturers, in the block of disc drive after manufacture, the unit of the disc drive is not able to determine the material of the disk.

Thus, by incorporating the above code material it is possible to precisely determine the actuator disc material disc regardless of registration status.

In line with this, can perform different settings, such as the laser power and the structure of the laser radiation, according to the type of material, which ensures high accuracy of the write operation.

Even if the material of the disc can be identified by the code of the manufacturer and product type, material code you can use to confirm the definition.

As shown in Fig, additional information 1 includes information relating to the rotation of the motor drive and the control of laser power, such as the minimum constant linear velocity recording, the coefficient ρ multiplying the power specified by the value of γ and the ratio of the power of the erase and write.

Additional information 1 also contains information related to the rotation of the motor di is kovada and to regulate the laser power, such as the predetermined recording power with minimum writing speed and maximum recording speed factor ρ multiplying the power at minimum recording speed and the maximum writing speed and the ratio of the power of erasing and recording with minimum writing speed and at the maximum recording speed.

Added information includes inertia (moment of inertia), disk configuration, physical structure, density disk, etc.

Details information of 1 bit on the density of the disk shown in Fig.

A value of "0" indicates that the density of the disk is a standard density (single density), while the value "1" indicates that the density of the disc is a high density (double density). By identifying the type of the density of the disk can be identified characteristics and parameters of the disk by using the tables shown in figure 2.

Details information of 2 bits of the physical structure shown in Fig.

A value of "0" indicates that the mounted disk is a standard disk, writable, while the value "1" is the backup.

Details information of 2 bits on the disk configuration shown in Fig.

The value "00" indicates a normal (round) disk, which is a disk with a diameter of 12 cm or a disk with a diameter of 8 see the Value "01" denoted by the AET triangular plate. The value "11" indicates the square drive. The value "11" represents the drive that has a configuration different from the above disk.

Examples of disk configuration shown in figa-20S.

On figa shows the normal disk with a diameter of 12 cm, and figv with a diameter of 8 cm Diameter center hole CH is 15 mm. In figures 18A-20C range of access as is the range available for optical pulling tool of the actuator disk, in other words the radial range in which can be formed track record.

Although some drives have a configuration different from the normal disk drive, these drives can be installed and execute on them the operation of the read/write if the size and configuration of the disks provide their placement inside of a round disk with a diameter of 12 cm, and the Central hole CH has a diameter of 15 mm

On figa and 19C shows a triangular disks, represented by the value "01" disk configuration. Namely, figa shows the correct triangular plate, and figv shows another triangular shape that is different from the regular triangular shape. The diameter of the center hole CH of such triangular disks equal to 15 mm

The range of access speakers such triangular disks smaller than normal disks, as shown in figa and 19C. However, the triangular disks can service is in the actuator disk and use it to write or read data.

On figa, 20B and 20C are shown rectangular disks, represented by the value "10" disk configuration. Namely, figa shows a square drive on FIGU shown rectangular disc, and figs shows another type of quadrilateral disk. The diameter of the center hole CH of such rectangular disks equal to 15 mm

As for the triangular disks, the range of access speakers such rectangular disks smaller than normal drives. However, the rectangular disks can be installed in the unit disc, and be used to write or read data.

Disks having a configuration different from the triangular and quadrangular, represented by the value "11" disk configuration, not illustrated. However, in this case, pentagonal or hexagonal discs or discs that have more than six sides, or round discs with a diameter other than 8 cm or 12 cm, elliptic discs, special configurations, such as disks, star-shaped or in the shape of a cloud.

These disks can also be used to write or read, if only the size and configuration of these drives fit inside the disk with a diameter of 12 cm and a Central hole CH has a diameter of 15 mm

As examples of triangular and quadrangular disks on figa-20S, their shape is not limited to right triangles or quadratmeter way if it is desirable to accurately identify the configuration of such disks, the size of these discs can be recorded, for example, in parts of the reserve zone (M19-M7) added information.

As an alternative solution, as the bits marked "a" and "h" on figa and 21B, it is possible to use 4 bits for "a" and "h" as follows.

If the value of 4 bits indicating "a"to designate the Av and the value of 4 bits indicating "h"to denote Hv,

a=Av [mm] (0-15 mm) are indicated in increments of 1 mm)

h=Hv [mm] (0-1,5 mm are specified in increments of 0.1 mm)

Details information of 2 bits of inertia (moment of inertia) for added information shown on Fig.

When the value of inertia "00", then the moment of inertia is less than 0.1 g·m2. When the value of inertia "01", the moment of inertia equal to or greater than 0.01 g·m2however , less than 0.02 g·m2. When the value of inertia "10", the moment of inertia equal to or greater than 0.02 g·m2however , less than 0.03 g·m2. When the value of inertia "11", the moment of inertia equal to or greater than 0.03 g·m2.

If the moment of inertia denote J, then it can be expressed by the following formula:

J=Σ(mi×ri2),

where ridenotes the distance from the beginning (i.e. from the center of rotation of the disk), and midenotes the mass at ri.

According to the above four is ule, moment of inertia J is the sum of the products of mass miand the square of the distance ri; and is never equal to zero. Accordingly, when increasing the disk increases the moment of inertia J.

The physical meaning of moment of inertia J is determined by the magnitude equation of rotation. I.e. fair formula:

J×α=T,

where α denotes the differential of the second order angle Θ rotation (= angular velocity), and T denotes the moment of force (torque).

From this equation it follows that the moment of inertia J is equivalent to the mass m in the equation of the rotation of the particles. Thus, the moment of inertia J is an important physical quantity during the rotation of a rigid material.

Usually the imbalance Imthe disk is expressed by the following formula:

Im=Σ(mi×ri).

Thus, the imbalance Imequal to the sum of the products of mass mi; and the distances ri. If the disk is perfectly symmetrical and uniform in thickness, the imbalance Imis equal to zero. However, although the imbalance Imzero moment of inertia J is not equal to zero and there is no correlation between the moment of inertia J and the imbalance Im.

As follows from the above description, the moment of inertia of the disk is used to control the motor drive that rotates the disk.

As mentioned in the above, the disks are not limited to the configuration of a disc with diameter of 8 or 12 cm, and there are various configurations and sizes of disks. The moment of inertia of the disk is changed in accordance with the dimensions and configuration of the drive. Accordingly, by specifying the moment of inertia, as mentioned above, it is possible to properly control the system rotational drive motor of the drive (i.e. in accordance with the dimensions and configuration of the disk). Namely, it is possible to accurately set the optimum gain of the servo-system drive in accordance with the dimensions and configuration of the disk.

Although in this embodiment, the moment of inertia is represented by two bits, it can be extended to three bits using bits M7 backup zone added information. In this case, the moment of inertia can be represented as shown in Fig way. A value of "000" indicates that the moment of inertia is less than 0.004 g·m2. A value of "001" indicates that the moment of inertia equal to or greater than 0.004 g·m2however , less than 0.01 g·m2. A value of "010" indicates that the moment of inertia equal to or greater than 0.01 g·m2but less than 0,022 g·m2. A value of "011" indicates that the moment of inertia equal to or greater than 0,022 g·m2but less than 0.032 g·m2. A value of 100 indicates that the moment of inertia of RA the yen or more to 0.032 GM 2however, less than 0.037 g·m2. The value "101" indicates that the moment of inertia equal to or greater than 0.037 g·m2. The value of "110" and "111" are back. If you expect larger values of moment of inertia, you can use the above definition.

As an example, the standard thickness, configuration and material, a disk with a diameter of 60 mm has a moment of inertia equivalent to "000", a disk with a diameter of 80 mm has a moment of inertia equivalent to "001", the disk with a diameter of 100 mm has a moment of inertia equivalent to "010" and a disc with a diameter of 120 mm has a moment of inertia equivalent to "011". The moment of inertia of some discs with a diameter of 120 mm can be equivalent to "100" depending on the type of material. A disk having a thickness of more than the standard thickness, or a disk having a non-uniform mass distribution in the radial direction, for example, a disk in which the weight on the outer perimeter greater than the weight on the inner perimeter may have a moment of inertia equivalent to "101".

In the shown Fig and 23 examples, the moment of inertia is represented by the specified range. However, the moment of inertia can be determined by using equations, and in this case, record the appropriate information.

For example, information about the inertia recorded using four bits, such as M5-M8. If the value of the 4 bits denote as Jv/sub> [hex]moment of inertia Jcal[G.2] can be expressed by the following formula:

Jcal=Jval×(1/500).

Thus, the discussed detail information lobularia contained in the ATIP frame.

In the previous example, the value "00" disk configuration denotes a normal (round) disc diameter as 8 and 12 cm without their differentiation. This is because they can be distinguished by the value of the moment of inertia.

Namely, the moment of inertia of a normal disk with a diameter of 8 cm less than 0.01 g·m2, while the moment of inertia of the disk 12 cm in diameter equal to or greater than 0.03 g·m2. Accordingly, if the value of the disk configuration "00", and the value of the moment of inertia "00", then the disk is a normal disk with a diameter of 8 cm And Vice versa, if the value of the disk configuration "00", and the value of the moment of inertia "11", the disk is a normal disk with a diameter of 12 cm

As an alternative solution, using part of the reserve areas added information, you can write information to differentiate the 8 cm disc 12 cm disk.

3-3. The format of the recording area

Below is a description of the format, when a block of the disk drive writes data in the recording area is made writable optical disc. On Fig shows the format of the recording area is made writable optical disk, and the and Fig shows the track format, shown in Fig.

As shown in Fig, the drive unit of the disk sequentially formats recording area, such as area calibration power (PCA), the area of program memory (RMA), to enter one or many tracks and the area of the output from the inner periphery to the outer periphery of the disk.

Then, as shown in Fig, the actuator disk divides each track into multiple packages, according to the method of recording packets, and writes the user data.

Shown in Fig area for power calibration of an area, which is a trial recording to regulate the output power of the laser beam. Each track is a zone in which the recorded user data. Zone input zone and output stores the table of contents (TOC), such as the start address and end address of each track, and various items of information relating to the corresponding optical disc. Area of program memory (PMA) is the area which temporarily stores the table of contents of each track. Each track is formed by a preliminary space for recording information track, and a user data area for recording user data.

Each package shown in Fig includes at least one read block of user data, spanning five blocks, which are formed from a single block LINK BLOCK) and four blocks of run-IN), located in front of the block of user data, and two connecting unit formed by two blocks of output (RUN-OUT)located after the block of user data. The communication unit is used to connect the package.

According to the method of recording packets with a fixed length, in the area of records made writable disk form a set of tracks, and each track is divided into multiple packages. Then the number of blocks of user data (length blocks) do the same for packets within a single track, and record the data simultaneously in each package.

Thus, according to the method of capture packets with a fixed length, area write formatted so that the length of the individual packages within the same track, the same and the number of blocks of user data in the packets is the same.

On Fig shows the format of the recording area of the optical disk, formatted the drive unit of the disk. Through full or partial formatting of the recording area using fixed-length packets, formatted recording area filled with packets of a fixed length.

4. Subcode and the table of contents

The table of contents and subcode recorded in the area of the input disc of the CD format, are as follows.

The minimum unit of data recorded on the disc format CD, is the frame. 98 frames form one unit. The structure of a single spacecraft is RA shown in Fig.

One frame is formed of 588 bits, of which the first 24 bits are the data synchronization, the next 14 bits are data subcode and the remaining bits are data and parity.

98 frames with the above configuration form one unit, and data subcode extracted from 98 frames are going for education data subcode (frame subcode) of one block, as shown in figa.

Data subcodes isolated from the first and second frames (frames 98n+1 and 98n+2) of the 98 frames are used as a synchronization group. 3-98 frames (frames 98n+3 and 98n+98) form the set of elements of data channels, i.e. formed data P, Q, R, S, T, U, V and W of subcodes, each of which has 96 bits.

From these data the subcodes P channel and Q channel are used to control access. However, since the P channel indicates only a pause between tracks, more precise control is performed by using channel Q (Q1-Q96). Data from 96 bits of Q channel are shown in figv configuration.

Four bits, i.e. Q1-Q4 are used as management data to identify is whether the number of audio channels 2 or 4, if the process predistortion data (music)recorded on the disc whether the disc is a CD-ROM and whether digital copying.

Then use the following four bits, i.e. Q5-Q8, as (ADR), which specifies the PE the data sub-Q. Namely, the following modes (content data sub-Q) can be represented using the ADR of 4 bits.

0000: mode 0... basically all the data sub-Q are zero (except CD-RW)

0001: mode 1... normal mode

0010: mode 2... catalog number drive

0011: mode 3... international standard recording code (ISRC)

0100: mode 4... used for CD-V

0101: mode 5... used for rewritable disc types, such as CD-R, CD-RW, and CD-EXTRA

After ADR 72 bits Q9-Q80 is used as the data sub-Q, and other bits Q81-Q90 used as a cyclic redundancy code.

Addresses (absolute addresses and relative addresses) can be expressed data sub-Q, when ADR represent mode 1.

As for the formats of the addresses represented by the data sub-Q, the following provides a description of the format used for known drives standard density, such as CD-DA, with links to figa and 29B, while the description of the format used for high-density disks, such as CD-R and CD-RW is given below with reference to figa and 30V. In high density, it is necessary to extend the maximum value of the absolute address in accordance with a higher capacity drives. In line with this, the address value of high-density disks represented as hour/minute/second/frame, while the absolute address in the disk is a standard density appears as minute/second/frame.

Below is a description of the data sub-Q, when ADR is mode 1, with reference to figa-30V, and the structure of the table of contents data sub-Q with links to Fig.

Data sub-Q recorded in the area of the input disk, serve as the information in the table of contents. Namely, 72 bits of data sub-Q from Q9 to Q80 Q channel data read from the fields contain the information shown in figa or 30A. Shown in figa or 30A data sub-Q give a detailed view of 72 bits of data sub-Q (Q9 to Q80) Q channel data shown in Fig. Data sub-Q divided by eight bits and represent the information in the table of contents.

In the data sub-Q for the standard disk density, shown in figa, eight bits Q9-Q16 indicate the track number (TNO). In the area of the input track number is set to "00".

The following eight bits Q17-Q24 indicate the point). Q25-Q32, Q33-Q40 and Q41-Q48, each eight bits, and represent, respectively, minutes (MIN), seconds (SEC) and frame as an absolute address. In Q49-Q56 set to "00000000". Then write PMIN, PSEC and PFRAME, respectively, in Q57-Q64, Q65-Q72 and Q73-Q80. The values of PMIN, PSEC and PFRAME are determined by the POINT value.

On the other hand, in the data sub-Q for high-density disk, shown in figa, using each of the four bits of the eight bits Q49-Q56, specified time, which is a higher category than a minute/CE is the round/frame.

Namely, in the zone input using four bits Q49, Q50, Q51 and Q52 recorded time "hours", "HOUR"), which is a higher category than the MIN, SEC and FRAME. Using the four remaining bits Q53, Q54, Q55 and Q56 write "PHOUR", which is a higher category than PMIN, PSEC and PFRAME.

In the data sub-Q zone input, shown in figa or 30A, the following information is determined by the value of the point).

In the code sub-Q, shown in figa, when the point value is represented as "01"-"9F" in the binary-decimal code ("01"to"FF" in binary code), it means the track number. In this case, PMIN, PSEC and PFRAME recorded minute (PMIN), second (PSEC) and the frame (PFRAME) starting point (absolute address in time) a track number.

When point value is "A0", the track number of the first track in the zone program is recorded in PMIN. Specification (type) disk, such as CD-DA, interactive CD (CD-I), CD-ROM (BOM HA), can be identified using the value PSEC.

When point value is "A1", the track number of the last track in the zone program is recorded in PMIN.

When point value is "A2", the starting point of the zone input is recorded in PMIN, PSEC and PFRAME in the form of an absolute address in time (minute (PMIN), second (PSEC) and the frame (PFRAME).

On the other hand, in the code sub-Q, shown in figa, when the point value is represented as "01"-"9F", this lake is achet track number. In this case, PHOUR, PMIN, PSEC and PFRAME recorded hour (PHOUR), minute (PMIN), second (PSEC) and the frame (PFRAME) starting point (absolute address in time) a track number.

When point value is "AO", the track number of the first track in the zone program is recorded in PMIN, and the format of the session may be identified by using the value of PSEC. For normal, high-density disks PSEC is set to "00".

When point value is "A1", the track number of the last track in the zone program is recorded in PMIN.

When point value is "A2", the starting point of the zone input is recorded in PHOUR, PMIN, PSEC and PFRAME in the form of an absolute address in time (hour (PHOUR), minute (PMIN), second (PSEC) and the frame (PFRAME).

As point values possible values that are already defined or to be defined in the future, such as "A3" and subsequent values, such as "*" and"*". However, the interpretation of these values is not given.

In this embodiment, the recorded various types of physical information when the point value is "F0", and their detailed explanation is given below.

Thus, the table of contents is generated by a data sub-Q, shown in figa or 30A. For example, the table of contents formed by using the data sub-Q disk on which recorded six tracks in the area, as shown in Fig.

All track numbers TNO tab the Itza content inevitably represented as "00". As mentioned above, the block number specifies the number of data sub-Q, which is read in the form of a data block (frame subcode), which consists of 98 frames.

In the data tables of contents, shown in Fig, the same data is recorded in three consecutive blocks. Point values "01"to"06" is specified for six tracks (music), respectively, of the track No. 1 to No. 6, and the starting point of the first track No. 1 - the sixth track No. 6 shown in PHOUR, PMIN, PSEC and PFRAME. Shown in Fig table of contents based on the data sub-Q, shown in figa, but if the table of contents would be based on the data sub-Q, shown in Fig, then PHOUR would not.

When the value of point is "A0", PMIN specified "01" as the first track. The disc type can be identified using the value PSEC, and because the value of PSEC is "20", the drive is a compact, high-density disk.

When point value is "A1", the track number of the last track ("06") recorded in PMIN. When point value is "A2", the starting point of the zone input is recorded in PHOUR, PMIN, PSEC and PFRAME.

After block n+26 (blocks n+27, and so on) repeated the same data are specified for units n - n+26.

In the shown Fig example recorded only six tracks and the number of blocks is limited, so that the values of points are marked only as "A0", "A1" and "A2". However, in practice, m is bound to be more blocks, so the point value indicates "A3" and subsequent values, e.g. "F0" or "CF", described below. The number of tracks may also be different for different drives. Accordingly, one block in the table of contents is not limited to the 27 blocks shown in Fig.

In the area of application in which recorded music, for example, track No. 1- # n, and the area of the input data sub-Q is specified by using the information shown in figv or 30V.

On FIGU or 30V shows the details of the 72 bits of data sub-Q (Q9 to Q80) data channel Q (Q1-Q96), shown in figv.

In the data sub-Q, shown in figv, eight bits Q9-Q16 used to record the track number (TNO). Thus, in the track No. 1-No. n is written in binary-decimal code one of the values "01"-"99". In the area of the input track number written as "AA".

The following eight bits Q17-Q24 are used to write the index (X). The index can be used to separate each track.

Q25-Q32, Q33-Q40 and Q41-Q48, each eight bits, represent, minutes (MIN), seconds (SEC) and frame (FRAME) as the elapsed time (relative address) within a track. In Q49-Q56 set to "00000000".

In Q57-Q64, Q65-Q72 and Q73-Q80, eight bits each, write, respectively, AMIN, about the ASEC and AFRAME as minute, second and frame absolute address. Absolute addresses are addresses assigned to the series is from the beginning of the first track (i.e. from the beginning of zone) to zone output.

In contrast, in the data sub-Q, shown in figv, the track number (TNO) is written in eight bits Q9-Q16. In track No. 1-No. n indicates one of the values "01"-"9F" in binary code. In decimal can be written to "0"-"159", and thus can be provided to 159 track numbers. In the area of the output is written to "AA".

In the following eight bits Q17-Q24 is written to the index (X). Using the index of each track can be divided into smaller parts. As an index, use one of the values "01"-"9F"in binary code.

In Q25-Q32, Q33-Q40 and Q41-Q48, each eight bits specify the minute (MIN), seconds (SEC) and frame (FRAME) as the elapsed time (relative address) within a track.

Using the following four bits Q49-Q52 record the time hour "HOUR", which is a higher category than the MIN, SEC and FRAME. In line with this, the relative address is represented using the hour/minute/second/frame. The drive to write data to MIN, SEC, FRAME and HOUR are used hFF, FF, FF, F, so that the relative time is not used.

In Q57-064, Q65-Q72 and Q73-080, eight bits each, write, respectively, AMIN, about the ASEC and AFRAME as minute, second and frame absolute address.

Using the following four bits Q53-Q56 recorded time "AHOUR", which is a higher category of elite gadgets is her than AMIN, about the ASEC and AFRAME. In line with this, an absolute address, as well as the relative address represented by hours/minutes/seconds/frame.

Absolute addresses are addresses assigned sequentially from the beginning of the first track (i.e. from the beginning of zone) to zone output.

This is the code sub-Q CD format. In the code sub-Q there are areas AMIN, about the ASEC and AFRAME (and AHOUR) to represent an absolute address, and MIN, SEC and FRAME (and HOUR) to represent the relative address. Additionally, as address pointers pointing to the beginning of the track and the area of the input provided by PMIN, PSEC and PFRAME (and PHOUR). Values indicate the address with minutes, seconds and frames (and hours) in the binary-decimal code, and each has eight bits (and the hour has four bits).

BCD code is the entry representing "0"to"9" in blocks of four bits. Thus, in the binary-decimal code with eight bits can be represented by values from "00" to "99", namely, the eldest of four bits represent tens, and lower 4-bit units. According to the binary-decimal code of four bits can be represented by values from "0" to "9".

In the example shown in figa and 30V, the track number (TNO), point (POINT) and index (X) is represented in binary code of eight bits in the range from "00" to "9F".

Namely, the track number, for example, can be p is edstaven in the range from "0" to "9F" (=159) using the values accordingly, "00000000"-"10011111". In line with this, the number of tracks that can be managed in the format expanded to 159.

In the example shown in figa and figa, it is determined that the track number "00" represents the area of the input, and "AA" (=10101010) denotes the area of the output.

Point) and index (X) can be represented in the range from "0" to "9F" values, respectively, "00000000"-"10011111". Accordingly, it is possible to correlate the point with the track number. Using an index (X) can be split track 159 parts.

The reason for presenting the track number and index number from "00" to "9F" in binary code is as follows.

As mentioned above, in known CD format, i.e. information subcode shown in figa, special definitions, such as "A0", "A2", "A3", "*" or"*", to the point, if the POINT does not indicate the track number. In both examples shown in figa and 30A, you can use the "F0" as the value of POINT, as described in detail below.

Accordingly, if the "A0" is included after "9F" to represent the track number, "A0", which originally referred to a special code must be used when point is the track number.

If the point (POINT) uses "A0", "A2", "A3","*","*", etc. as track number in binary code, the definition of "A1" should be different is to be encoded between the standard density and the regime of high density, that affects compatibility. For example, in the recording device increases unproductive load software and hardware to coordinate with different definitions for the standard density and high density.

Thus, it was decided that the track extends only up to the "9F" (=159), and "A0" and the following codes are not used for track number. Even in high-density "A0" and the following codes are used to identify factors other than the track number.

In accordance with this value point) from "00" to "9F" is used for the track number and "A0" and the following codes are used for special definitions.

In accordance with the allocation code point), i.e., from "00" to "9F" except for special definitions, the values "00"-"9F" in binary code is also allocated for the index (X), which has the same distribution of bits in the format subcode.

Another reason for limiting the number of tracks to "9F" is the possibility of using a track number "AA" in standard mode density, i.e. determining a track number that represents the zone output mode high density.

As mentioned above, in the data sub-Q in the zone input (i.e. data in the table of contents), the point value (POINT) determines the information content of the frame OCCS is tiravanija. As mentioned above definition frame subterania when point indicates "01"-"9F", "A0", "A1" and "A2".

Below is a description of scenarios in which the frame subterania should be written information, when the value of the point (POINT) indicates "F0".

On Fig shows the contents of the frame subterania, i.e. MIN, SEC, FRAME, HOUR, PHOUR, PMIN, PSEC and PFRAME, in accordance with the value of the point), when ADR is equal to 1, i.e. when the data sub-Q are in normal mode.

As mentioned above, records various types of information indicated by the position (a) on Fig when the value of the point is one of "01"-"9F", "A0", "A1" and "A2".

When the value of point is "F0", the physical information of the medium is recorded in PMIN, PSEC, PFRAME.

Frame subterania shown in Fig, based on the data sub-Q, structured according figa. If it is based on the data sub-Q, structured according figa, physical information carrier can also be recorded in PMIN, PSEC and PFRAME, when the value of point is "F0".

The physical content information indicated by the position (b) on Fig. As shown in Fig in position (b), PMIN, PSEC and PFRAME, i.e. Q57-Q80, recorded information, such as material, type of media, the linear velocity and the step between tracks, each of four bits, moment of inertia, the configuration and size of the disk, each of the C which consists of 2 bits.

Information of 4 bits about the size of the disk shown in Fig. A value of "0000" indicates that the disk size is 120 mm, the Value "0001" indicates that the disk size 80 mm Other values are backup.

Information of 2 bits on the disk configuration shown in Fig. The value "00" indicates that the disk is round. Normal circular disk is a disk with a diameter of 12 or 8 see the Value "01" indicates that the disc is triangular. A value of "10" indicates that the disc is quadrangular. The value "11" indicates that the disk has a configuration other than the above configurations. Other values are backup.

Information of 2 bits of the moment of inertia is shown in Fig. The value "00" indicates that the moment of inertia is less than 0.01 g·m2. The value "01" indicates that the moment of inertia equal to or greater than 0.01 g·m2but less than 0.02 g·m2. A value of "10" indicates that the moment of inertia equal to or greater than 0,02 GM2but less than 0.03 g·m2. The value "11" indicates that the moment of inertia equal to or greater than 0,03 GM2.

When accessing the configuration information of the disk and the moment of inertia block of the disk drive is able to detect them. Besides, there are different disk configuration, details of the information, such as disk size, configuration, and moment of inertia, and modification of such information. However, these factors will discuss what was given above in the description information of lobularia. Therefore, their explanation is not given.

Information of 4 bits on the step between tracks shown in Fig. A value of "0000" indicates that the step between tracks is equal to 1.05 μm. A value of "0001" indicates that the step between tracks equal of 1.10 μm. A value of "0010" indicates that the step between tracks of 1.15 μm. A value of "0011" indicates that the step between tracks is equal to 1.20 μm. The value "1000" indicates that the step between tracks is equal to 1.50 μm. The value "1001" indicates that the step between tracks is equal to 1.55 μm. The value "1010" indicates that the step between tracks is equal to 1.60 μm. The value "1011" indicates that the step between tracks equal of 1.65 μm. A value of "1100" indicates that the step between tracks is equal to 1.70 μm. Other values is the backup.

The step between tracks indirectly shows disk density (standard density/high density). So, "0000"-"0011" indicates that the disk is of high density, while "1000"-"1100" indicates that the disk is a standard density.

Information of 4 bits of the linear velocity shown in Fig.

A value of "0000" indicates that the linear speed equal to 0.84 m/s the Value "0001" is 0.86 m/s the Value "0010" - 0,88 m/S. the Value of "0011" - 0.90 m/sec Value "0100" - 0.92 m/s is set to "0101" - 0,94 m/S. the Value of "0110" - 0,96 m/S. the Value of "0111" - 0,98 m/s the Value"1000" - 1.15 m/s the Value "1001" - 1.20 m/s the Value"1010" - 1.25 m/s the Value "1011" - 1,30 who/C. A value of"1100" shows that the linear speed equal to 1.35 m/s the Value of "1101" - 1.40 m/s the Value "1110" - 1.45 m/s the Value "1111" is the backup.

Linear speed is also indirectly indicates the recording density of the disk (standard density/high density). So, "0000"-"0011" indicates that the disk is of high density, while "1000"-"1110" indicates that the disk is a standard density.

Information of 4 bits on the media type is shown in Fig. A value of "0000" indicates that the media is the only media to read. A value of "0001" indicates that the carrier is a carrier for reading immediately after write (DRAW) (for single entry and multiple-read-many (WORM)). A value of "0010" indicates that the carrier is the carrier of a rewritable. The value "0011" is back. A value of "0100" indicates that the medium is a hybrid medium having an area only for reading and zone DRAW (WORM). The value of "0101" indicates that the medium is a hybrid medium having an area to read-only area and rewritable. The value of "0110" indicates that the medium is a hybrid medium having an area DRAW (WORM) and the area to read-only. The value of "0111" indicates that the medium is a hybrid medium having an area with the possibility of rewriting the zone DRAW (WORM). The value "1000" indicates that the medium is a hybrid medium having an area of standard-density read only and the area of high density read only. Other values are backup.

Information of 4 bits of material shown in Fig. A value of "0000" indicates that the extruded grooves formed on the recording layer, i.e. the layer material is a material used for the disk to read-only. The value "1000" indicates that the material of the recording layer is tsianina used to drive the DRAW (WORM). The value "1001" indicates that the material layer is a phthalocyanine that is used to drive the DRAW (WORM). The value "1010" shows that the material of the recording layer is uzasadnienie used to drive the DRAW (WORM). The value "1011" indicates that the material layer is a material with a phase change that is used for disk rewritable. The value "0001"is"0111" and "100-1111" are back.

As mentioned above, the physical information carrier recorded in the data sub-Q (table of contents) area input. This allows the actuator drive simply and accurately determine the disk size, configuration, moment of inertia, the step between tracks, linear speed, media type, the material of the recording layer.

Instead of physical data storage media in the data sub-Q (table soda is Jania) zone input shown in Fig-39, you can use the physical information shown on Fig-45.

As data sub-Q, denoted by position (a) on Fig, the content data sub-Q, when ADR is equal to 1, i.e. the content of the data sub-Q in normal mode, shown in position (a) on Fig. And it shows the contents of the frame subterania in accordance with the value point), i.e. the content of MIN, SEC, FRAME, HOUR, PHOUR, PMIN, PSEC and PFRAME.

Information indicated by the position (a) on Fig, similar to the information indicated by the position (a) on Fig. However, the information carrier to be written in PMIN, PSEC and PFRAME, when the value of point is "F0", can be recorded, as indicated by the position (b) on Fig, and not as indicated by the position (b) on Fig.

Data sub-Q, denoted by position (a) on Fig, as well as data sub-Q, denoted by position (a) on Fig, based on the data structure sub-Q, shown in figa. If they are based on the structure of the data sub-Q, shown in figa, and the value of point is "F0", the physical information carrier, indicated by position (b) on Fig can also be recorded in PMIN, PSEC and PFRAME.

In the physical information indicated by the position (b) on Fig, 24 bits PMIN, PSEC and PFRAME, i.e. Q57-Q80 recorded media type of the 4-bit version of media from 4 bits, the type of material of the 4-bit linear speed of 2 bits, the step between tracks of 2 bits, the moment of inertia is 3 bits, size/disk configuration of 4 bits.

Information of 4 bits about the size/configuration of the disk shown in Fig.

A value of "0000" indicates that the disk size is 120 mm, the Value "0001" indicates that the disk size 80 mm Other values are back. Using fallback values, you can record the dimensions and configuration of the other drives.

For example, Q79 and Q80 can be used for information about disk size, a Q77-Q78 can be used for information about disk configuration.

Information of 2 bits on the disk configuration can be set, as shown in Fig. Namely, the value "00" indicates that the disk is a normal round disc. The value "01" indicates that the disc is triangular. A value of "10" indicates that the disc is rectangular. The value "11" indicates that the disk has a configuration other than the above configurations.

As an alternative solution, if the number of types of combinations of disk size and disk configuration does not exceed 16, they can be defined by four bits Q77-Q80 using values"0000"-"1111".

As information of 3 bits of the moment of inertia, recorded in Q74-Q76, we can use the definition shown in figa, it is the value of "000" indicates that the moment of inertia is less than 0.004 g·m2. A value of "001" indicates that the moment of inertia equal to or greater than 0.004 g·m2n is less than 0.01 g·m2. A value of "010" indicates that the moment of inertia equal to or greater than 0.01 g·m2but less than 0,022 g·m2. A value of "011" indicates that the moment of inertia equal to or greater than 0,022 g·m2but less than 0.032 GM2. A value of 100 indicates that the moment of inertia equal to or greater than 0,032 g·m2but less than 0.037 g·m the Value "101" indicates that the moment of inertia equal to or greater than 0.03 g·m2. The value of "110" and "111" are back.

Information of 2 bits of the step between tracks shown in Fig. When the value is "00", then the step between tracks equal of 1.10 μm. Other values are backup.

Information of 2 bits of the linear velocity shown in Fig. The value "00" indicates that the linear velocity of 0.9 m/s all Other values are backup.

As information of 4 bits on the type of material recorded in Q65-Q68, we can use the definition for bits Q57-Q60 shown in Fig.

Information of 4 bits about the version of the carrier shown in Fig. A value of "0000" indicates the version is 0.9. A value of "0001" indicates the version of 1.0. Other values are backup.

Information of 4 bits on the media type is shown in Fig. A value of "0000" indicates that the disk is a carrier of high density (double density) set to read-only. A value of "0001" indicates that the disk is what setelem high density DRAW (WORM). A value of "0010" indicates that the disk is the carrier of a high-density rewritable. Other values are backup.

In accordance with the above physical information of the media data sub-Q (table of contents) area input unit of the disk drive is capable of simply and accurately determine the disk size, disk configuration, the moment of inertia, the step between tracks, linear speed, media type, the material of the recording layer and the version.

As mentioned above, for types with multiple use, such as CD-R, CD-RW, CD-EXTRA, etc., the value of the data sub-Q can be "0101", i.e. mode 5.

In this embodiment, when ADR in the data sub-Q (table of contents) in the zone input is mode 5, the information shown in Fig, is recorded in accordance with the value of the point). The information shown on Fig is useful for hybrid disk having multiple zones, each of which has an area of the input zone and the output, called a "unit area" for write/read.

When the value of point is "B0", the absolute time (absolute address)where the area of the program following a single area, is recorded in MIN, SEC, FRAME and HOUR. In PHOUR, PMIN, PSEC and PFRAME recorded absolute time (absolute address), which begins on the last unit area of the disk.

When the point value (OINT) is "C0", special information 1 above information of lobularia recorded in MIN, SEC, FRAME and HOUR. In PHOUR, PMIN, PSEC and PFRAME recorded absolute time (absolute address), which begins in the area of commissioning of the first unit area of the disk.

When the value of point is "CF" in the last single zone, information lobularia recorded in PHOUR, PMIN, PSEC and PFRAME, is set to zero, since there is no subsequent single zone. In the alternative, the frame subcode in which the value of point is "CF", is missing.

As mentioned above, in this embodiment, when accessing information data sub-Q hybrid drive, in particular, to the "absolute time, which begins area enter the following single zone", when the value of point is "CF", it is possible to accurately determine the position of the zone, enter the following unit area.

For example, on figa shows a diagrammatic representation of a disk having two isolated zones No. 1 and No. 2, and figv shown schematically disk having three isolated zones No. 1, No. 2 and No. 3. In accordance with the data sub-Q read from the input single zone, it is possible to identify the position of the zone, enter the following single zone, as shown on figa and 41C. This provides the unit disc, the possibility of sequential access zone input isolated areas, as shown single point the arrows, and thus the simple data reading table of contents of every single area.

In subcode zone input of each single zone recorded the absolute time, which ends the current zone output of a single zone. Thus, can be accurately identified any space between the area of the output current of a single zone and the zone input of the next unit area.

5. The configuration of the actuator disk

Below is a description of the actuator disk to perform the operation of the read/write head in accordance with the above different types of disks.

On Fig shows the block diagram of the block 70 of the disk drive. On Fig the disc 90 is a disc format CD, such as CD-R, CD-RW, CD-DA or CD-ROM. Different types of drives that described with reference to figa - 5V, can be installed in block 70 of the disk drive.

The disk 90 is mounted on a rotating platform 7 and is rotated by an electric motor 6 drive at a constant linear velocity or constant angular velocity during the operation of the read/write. The data is then grooves are read from the disc 90 by the optical pulling tool 1. When the disc 90 is a CD-RW disc, as data dredging read the notches formed by the phase change. When the disc 90 is a CD-R disc, read the notches formed by changes in the organic pigment (the ratio of the expression). When the disc 90 is a CD-DA or CD-ROM, then read the extruded hollow.

Optical pulling tool 1 includes a laser diode 4, which serves as a laser light source, a photodetector 5 for detecting reflected light, a lens, 2 lens, which serves as the output terminal of the laser light and the optical system (not shown) for the laser beam on the recording surface of the disk through the lens 2 of the lens and for directing light reflected by the disc to the photodetector 5. In the optical pulling tool 1 is also provided a detector 22 tracking for receiving part of the light from the laser diode 4.

Lens 2 lens is held biaxial mechanism 3, is arranged to move in the direction of the track and in the direction of focus. The entire optical pulling tool 1 is mounted for movement along the radius of the disk using salakavala mechanism 8. The laser diode 4 optical pulling tool 1 is controlled by control signal (which controls the current from unit 18 controls the laser.

Information reflected from the disk 90 of the light detected by the photodetector 5 and converted into an electrical signal based on the received amount of light. Then the electric signal is supplied to the RF amplifier 9.

Typically, the amplifier 9 is supplied by a scheme of automatic gain control (AGG). This tie is but the amount of light reflected from a CD-RW, varies greatly depending on, whether the data recorded on the disk 90 or the data just written to the disk 90, as compared with CD-ROM, as well as with the fact that the reflectance of CD-RWS is very different from the reflectance of CD-ROM or CD-R.

The amplifier 9 is also provided with a mapping of the current-to-voltage circuit, a matrix calculation/amplification, etc. to align with the output currents of all devices receiving light, which form the photodetector 5, thereby creating signals through a matrix calculation.

Read the radio frequency output signal from the amplifier 9 is supplied to the binarization scheme 11, while the signal FE defocus and the signal of the tracking error are served in seroprotection 14.

As mentioned above, the groove direction of the track previously formed on the disk 90, such as a CD-R or CD-RW. In accordance with a signal formed by performing frequency modulation of the time information indicating the absolute address on the disk, you lobularia grooves (meander). Accordingly, during the operation of the read/write rights to the information track can be servioce tracking, and can be obtained absolute address and various physical information. RF usilitel the 9 retrieves information WOB of lobularia through matrix calculations and delivers it to the decoder 23 of the groove.

The decoder 23 of the groove demodulates received information WOB of lobularia to extract the absolute address and supply it to the controller 10 of the system.

The information track is supplied also to the input of the phase synchronization circuit (PLL) for information about the rotation speed of the motor 6 of the drive. By comparing the information on the rotation speed information speed reference is generated and applied to the output signal SPE errors of the drive.

Made writable discs such as CD-R and CD-RW discs include two types of discs, such as disc standard density and high-density disk. The decoder 23 track switches the decoding system in accordance with the type information density at the output of the controller system 10. Namely, the decoder 23 track switches matching the structure of the synchronization frames.

Read high-frequency signal received by the amplifier 9, is converted to binary form in scheme 11 binarization for conversion into a signal of eight to fourteen (EFM). The EFM signal is supplied to the device 12 encoding/decoding.

The device 12 encoding/decoding has both functions, such as the function of decoding required for reading data, and an encryption function that is required to write data. In data reading device 12 encoding/decoding performs de is adulatio EFM, error correction cross-peremeshivaemogo reed-Solomon code, reverse peremeshivanie, decoding CD-ROM and so on, thereby giving the signals in the format of CD-ROM.

The device 12 encoding/decoding also retrieves subcode from the data read from the disk 90, and supplies it to the controller 10 as the table of contents and address information in the form of subcode (data Q).

Additionally, the device 12 encoding /decoding creates a quantum read in synchronization with the EFM signal using the processing scheme of phase synchronization, and performs the above operation of the decoding on the basis of quantum reading. In this case, the device 12 encoding/decoding selects the information of the rotation speed of the electric motor 6 drive from quantum reading and compares it with the information of the reference speed, thereby creating a signal SPE errors drive, and delivers it to the output.

The device 12 encoding/decoding able to switch processing method depending on whether the disk (or unit area)to be read or write, drive a standard-density or high-density disk.

During read operations the device 12 encoding/decoding remembers above the decoded data in the buffer memory 20. At the time of submission to the output of data read from the block of the 70 drive the stored data is read in the buffer memory 20 and are output.

The interface 13 is connected to an external host computer 80, which are transmitted and which accepts write data, read data and various commands. As the interface 13 using the system interface small personal computers (SCSI) or a batch interface connection AT (ATAPI). When reading data, the read data is decoded and stored in the buffer memory are transferred to the host computer 80 via the interface 13.

Read command, write command and other commands from the host computer 80 are fed into the controller system 10 via the interface 13.

When recording data, the recording data (such as audio data or data CD-ROM) are transferred from the host computer 80 via the interface 13 and then stored in the buffer memory 20.

In this case, the device 12 encoding/decoding performs processing for encoding data in the format of CD-ROM (if supplied data is CD-ROM), such as coding using cross-peremeshivaemogo reed-Solomon code, peremeshivanie, adding subcode and EFM demodulation, thereby forming the data of the CD format.

The EFM signal obtained by processing the coding device 12 encoding/decoding, served in the block 21 strategy account. Then, the EFM signal is supplied to the block 18 in the management of the laser as a pulse laser control (write data WDATA).

Block 21 of the write policy provides compensation recorded data, i.e. permanently adjusts optimum recording power and the form of control pulses of the laser, in accordance with the characteristics of the recording layer, the configuration of the spot of laser light and linear velocity recording.

Unit 18 controls the laser pulses the laser control in the form of the write data WDATA to the laser diode 4, thereby driving the laser light. In line with this, depending on the EFM signal on the disc 90 are formed grooves (Pitta phase changes or pita pigment changes).

Scheme 19 automatic power control controls the output power of the laser to maintain it at a constant value without affecting the temperature for controlling the output power of the laser for controlling the detector 22. Using the value of the output power of the laser on the target, issued by the controller 10 system diagram 19 automatic power control controls unit 18 controls the laser, provided that the specified power value.

Seroprotection 14 generates various auxiliary control signals, such as signals for focusing, tracking signals for the sled and drive of the signal FE defocus and signal the tracking error from the output of the amplifier 9 and the error signal drive output is as device 12 encoding/decoding or decoder 23.

Namely, seroprotection 14 generates a signal FD management focus and the TD signal control tracking signal-based FE defocus and signal is the tracking error, respectively, and supplies them to the device 16 to control the two axes. Then the device 16 to control the two-axis controls the focusing coil and the tracking coil biaxial mechanism 3 optical pulling tool 1. In line with this, servomotor tracking and servomotor focus consist of optical pulling tool 1, the high-frequency amplifier 9, seroprotection 14, the device 16 to control the two axis and two-axis mechanism 3.

In response to a command to change tracks from the controller 10 system servomotor tracking can be turned off, and the control signal to change lanes is served in the device 16 to control the two axes. In this case, the device 16 to control the two axes performs an operation of changing tracks.

Seroprotection 14 also generates a control signal by the drive signal-based SPE errors drive and submits to the unit 17 controls the motor drive. In response to the signal of the drive control unit 17 controls the motor drive delivers, for example, three-phase excitation signal to the electric motor 6 of the drive, which then rotates at a constant linear velocity or constant angular velocity.

<> Seroprotection 14 also generates a signal to drive control based on the control signal start/deceleration drive of the controller 10 of the system and causes the block 17 of the drive control to start, stop, accelerate and brake the motor 6 of the drive.

Additionally, seroprotection 14 generates an error signal sled obtained in the form of a low-frequency component signal, the tracking error and the control signal is a carrier-based access control controller 10 system, and delivers them to the control unit 15 by the carrier. In response to the control signal by the carrier unit 15 of the control slide actuates salescopy mechanism 8. Salescopy mechanism 8 provided with a main shaft, a motor sled and gear mechanism (not illustrated) for holding the optical pulling tool 1. Due to actuate salakavala mechanism 8 through the block 15 controls the sled in accordance with the control signal optical carrier pulling tool 1 slides on the disk 90.

The above various operations performed using a servo-system and system read/write controlled by the controller 10 of the system, which is designed in the form of a microcomputer.

The controller 10 performs the above operation in response to commands from the host computer 80. For example, upon receipt of x the art of computer 80 commands for read, which tells the controller 10 of the system to transfer certain data recorded on the disc 90, the system controller first controls the operations search for a specified address. Thus, the controller 10 system issues a command in seroprotection 14 to provide access optical pulling tool 1 in the address specified in the search command.

Then, the controller 10 performs operations necessary to transfer the read data to the host computer 80. Thus, data is read from the disk 90, decoded and temporarily memorized. Then, the requested data is transferred to the host computer 80.

In contrast, in response to a write command from the host computer 80, the controller 10 of the system first moves the optical pulling tool 1 to the address in which to write data. Then the device 12 encoding/decoding processes of encoding, as mentioned above, the data sent from the host computer 80, to convert them into a signal EFM.

After that, the recording data WDATA output unit 21 strategy writing served on the block 18 controls the laser that provides the requested data to the disk 90.

In the shown Fig example, the block 70 of the disk drive connected to the host computer 80. However, the block 70 of the disk drive, such as a CD player or recorder CD-ROM drive, the cat is the second forming device read/write, according to this invention should not connect to the host computer 80. In this case, the configuration of the interface 13 is different from the configuration shown in Fig, for example, the interface 13 may be equipped with an operational unit and the display unit. Thus, data can be written and read by the user and can be created in the terminal for input and output audio data. The display unit may display the number of recordable or read currently track and time (absolute address or a relative address).

It is also possible various other configurations of the block 70 of the disk drive, for example, can be provided by the device only for recording or device to read-only.

6. Examples of the processing unit of the disk drive

Below is a description of the various processes of the actuator disk.

On Fig shows a graphical diagram of the program of example processing performed by the block 70 of the disk drive when inserted the disk 90. It should be noted that the table of contents data formed sub-Q, is recorded in the zone of the input disk 90. If you are installing a new drive (not the disc)such as a CD-R or CD-RW, it executes the processing shown in Fig, instead of the processing shown in Fig, because the table of contents not recorded on the disc.

Treatment, the specified graphical scheme of the program on Fig -52, is performed by the controller 10 of the system.

On Fig after installation disk 90, the controller 10 of the system at the stage F101 performs an operation starts and reads the table of contents. Namely, the controller 10, the system starts the motor 6 drive supports the servomechanism at a given speed, runs the laser light activates and maintains the focus servomechanism, supports the tracking servomechanism so that you can read data from the disk 90, and then reads the information in the table of contents.

Then at the stage F102 controller system 10 reads the physical information of the disc 90 from the table of contents, thus determining the physical characteristics of the disk 90. The operation can be performed by checking the information shown on Fig-39.

Then at the stage F103 is determined whether the disc 90 hybrid drive. This can be determined by using the media type, shown in Fig. If the result of this stage F103 is no, the process goes to the step F104, in which the system of the read/write head configured in accordance with the physical information about the type of disk 90. The setup operation is described in detail below with reference to Fig.

Now you can perform read/write on the disk 90. On stage F105 controller 10, the system waits for a command with x the art of computer 80 and performs a write operation or read in response to a write command or read, respectively.

If at the stage F103 it is determined that the disk 90 is a hybrid disc, that stage F106, the variable n is set to 1 and processing occurs on a path from the stage F107 to F112.

Namely, at the stage F107 physical information read at the stage F102, is stored as the physical information of a single zone number(n), namely, physical information, for example, a single zone No. 1 shown in figa or 47B.

After this stage F108, the variable n is incremented. Then at the stage F109 is determined by the address of the start zone of the input of the next unit area.

As mentioned above in relation to Fig, in the frame of subcode in which ADR is mode 5, and point CF is recorded the address of the start zone, enter the following single zone. Thus, at the stage F109 this information is checked.

If the address of the start zone, enter the following single zone recorded in the above frame subcode, the presence of the following individual zones can be automatically confirmed, and thus the process goes from step F110 to the step F111. On stage F111, the controller 10 controls seroprotection 14 to access the recorded area enter the start address.

When the optical pulling tool 1 will reach the zone of the input of the next unit area, at the stage F112 controller 10, the system reads the information in the table of contents. Information table maintained what I contains the physical information, shown in Fig-39.

Then the process returns to the step F107, in which a few physical information is stored as the physical information of a single zone number(n). In this case, the stored physical information of a single zone No. 2.

The above processing is repeated until the obtained physical information of the last single zone. Thus, when the address of the start zone, enter the following single zone is read from the frame of subcode in which ADR is mode 5, and the point has a value of CF at the stage F109, the value of the address is zero, or this frame of subcode does not exist. In this case, you can determine that the current single zone is the last unit area.

Accordingly, at the stage F110 is determined that the next single zone no, and the process goes to the step F113.

Thus, the controller 10 of the system after storing the physical information of all individual zones waits for a command from the host computer 80 and performs a write operation or read in response to a write command or read, respectively. Then before performing the write operation or the read controller 10, the system configures the system read/write based on the physical characteristics of the zone input, with which or to which must be read or written data.

In contrast to this the mu if you installed a new drive without the information of the table of contents, such as CD-R or CD-RW disc, the controller 10 performs the processing shown in Fig.

On stage F201 controller system 10 starts the motor 6 to drive, starts the radiation of laser light, supports approximately servomechanism drive activates and supports the focus servomechanism, supports the tracking servomechanism, simultaneously with the optical pulling tool 1 on the inner periphery of the disc 90. You can now perform the operation of reading data from the disk 90.

After this stage F202 read lobularia with the groove of the disk 90. The physical information of the disc 90 is read from the information lobularia to determine the physical characteristics of the disc 90. This operation can be performed by checking the information shown on Fig-23.

Then at the stage F203 configured system of the read/write head in accordance with the physical information of the disc 90. The setting information is described in detail below with reference to Fig.

Thus, it is now possible to perform a write operation on the disk 90. On stage F204 controller 10, the system waits for a command from the host computer 80, and performs the write operation in response to the write command.

As mentioned above, in this embodiment, when installed in the disk 90, the physical characteristic is cteristic disk 90 are determined from the data sub-Q (table of contents) or information lobularia, and run the various settings in accordance with physical characteristics.

Tuning operation performed on stage F104 on Fig or on stage F203 on Fig performed, for example, by using the processing shown in Fig. On stage F301 by first determining the drive configuration. Thus, in the case of information lobularia, verified information about the configuration described with reference to Fig-21B, and, if necessary, information about the moment of inertia shown in Fig. In the case of data sub-Q, verified information about the configuration shown in Fig, and information about the moment of inertia shown in Fig.

Then the controller 10, the system determines whether the configuration of the disk 90 is suitable for the write operation or read using the block 70 of the disk drive. This can be determined by using the block design 70 of the disk drive, such as the structure of the block, and various parameters, such as servicepilot.

If at the stage F301 it is determined that the configuration of the disk 90 is not suitable, the process goes to the step F302, which issued the error message. Then, at the stage F303 disk 90 is keen and the processing ends.

The error message is transmitted to the host computer 80 and can be displayed on the display monitor of the host computer 8, or can be displayed on the display unit 70 of the disk drive. May be given an auditory warning signal.

If at the stage F301 it is determined that the configuration of the disk 90 is appropriate, then the process goes to the step F304, which sets the operating mode in accordance with the density of the disk. On stage F304 can be determined density disk using the density information of the disk shown in Fig when used information lobularia. Or, when data is sub-Q, can be tested media type, shown in Fig, the step between tracks, shown in Fig, or the linear velocity shown in Fig.

Then switches the processing mode in the device 12 encoding/decoding or processing mode in the decoder 23 of the groove in accordance with the fact whether the disk density high density or standard density.

In accordance with the density of the disk also switch the gain and frequency characteristics of the high frequency amplifier 9, a variety of auxiliary factors, such as the coefficients of focusing and tracking, and setting the coefficients of the calculations used for search operations that are required to coordinate with various step between tracks.

Then, at the stage F305 is set the gain of the servo-system drive in accordance with the value of moment of inertia.

This is explained in detail below with reference to figa and W.

On figa shows the logarithmic amplitude and phase response of the open servomotor, when the gain of the servo-system drive, suitable for the installed disk having a large moment of inertia. In accordance with the relation between the gain and the phase, shown in figa can be obtained a sufficient supply of the control phase and gain.

On FIGU shows the logarithmic amplitude and phase response of the open servomotor, when the gain of the servo-system drive, unsuitable for the installed disk having a small moment of inertia.

In this case, in accordance with the gain and phase shown in figv, there can be obtained a sufficient supply of the control phase and gain, which impairs the stability of the system.

If the gain of the servo-system is reduced to the values shown in figv, to the appropriate size, shown in figa provides sufficient stock control phase and gain.

Thus, there is the appropriate value for the gain of a servosystem in accordance with the moment of inertia of the disk. Accordingly, at the stage F305 processing to the ratio of the gain of the servo-system is set to an appropriate value by inspecting the moment of inertia. Thus, the servo system drive can operate with high precision. In particular, because it requires very precise rotation of the drive when performing a write operation, this processing is effective.

On stage F306 is the range of movement of the optical pulling tool 1 based on the configuration disk.

As mentioned above in relation figa-20S, range AC access is changed according to the drive configuration. Accordingly, based on the configuration of the disk (and may be the above-mentioned sizes) is determined, which has access optical pulling tool 1 on the outer periphery of the disc 90, thereby establishing the range of movement of the optical carrier of the pulling tool 1. Thus, it is possible to prevent erroneous operation of the optical pulling tool 1, that is, the effects of laser light on the portion of the disk 90, no track record.

Stage F307 is executed only when the disc 90 is a CD-R or CD-RW. Based on the data material is configured processing to be executed by the block 21 strategy account. Data about the material, i.e. the material of the recording layer, can be tested using data on the material shown on Fig and information contained in lobularia, and with the type of material shown in Fig and contained in the data sub-Q.

As mentioned above, in block 21 of strategiespiel is shaped pulse as a pulse laser.

In the case of CD-R disc on which data is recorded by changing the pigment, the pulses of the excitation laser, such as indicated by the position (b) on Fig, created depending on the length of the notches/sites to be written, such as indicated by the position (a) on Fig that provides control of the radiation of laser light. The PWr level of excitation pulses of the laser determines the laser power during the recording.

On the CD-R pulses, indicated by items (b) and (C) on Fig, can be combined with each other, thereby synthesizing step excitation pulses of the laser, such as indicated by the position (d) on Fig. In accordance with step laser pulses, the laser power is increased to PWod in part of the area of the pulse, in which the notches, and such part is called the "impulse overstimulation". By feeding pulses overstimulation can more precisely control the power level of the laser within the period of the pulses.

In the case of CD-RW for recording data using the technique of phase changes, as indicated by the position (s) on Fig generated, the pulses of the excitation laser (pulse sequence), through which the laser power switch PWr power entry and power Pwc cooling in the zone of formation of the notches, thereby performing control of laser light. During the period the site is ewnost laser is installed on the power PWe erase.

With the final adjustment of the excitation pulses of the laser for CD-R and CD-RW in accordance with the material of the recording layer, it is possible to increase the accuracy of the entry.

Namely, for each pulse shape shown in Fig, in accordance with the material of the recording layer configures the time (i.e. setting the width of the laser pulses) by controlling the rising part and the falling part, marked with •and level setting (i.e. the setting of the laser power is performed by the management level of the pulses marked with Ο.

The cause of the control pulses in accordance with pulse-width and power of the laser is the following.

For example, in the case of the disk DRAW (WORM), such as a CD-R to record a longer extraction ratio of the laser power when writing to the laser power when reading should increase. Accordingly, accumulated a large amount of heat to increase the area, which is called a chemical reaction. As a result, the excavation to be written at this time becomes longer than the specified length. This effect is particularly noticeable when thermal sensitivity or thermal conductivity of the recording layer of the disk is higher.

The length of the notches to be written, also affects the length of the previous site. Thus, if super is, located directly in front of subject records the notch becomes shorter, the heat accumulated in the previous deepening, less diffused, thereby causing thermal noise from the earlier excavation.

For example, some of the grooves to be written, even if the length of the grooves is the same and the exposure time and laser power are the same, the recess adjacent to a shorter space becomes longer recess.

Because the accumulation and dissipation change depending on the material of the recording layer, the width of the pulses, the configuration of the pulses (the configuration of the laser radiation) and the level of the pulses (the power level of the laser) is adjusted in accordance with the material, thereby providing an education with high precision chain of fill.

As mentioned above, in accordance with the physical characteristics of the disk 90 is performed in the configuration shown in Fig that enhances the quality of the read/write.

If at the stage F103 on Fig it is determined that the disk 90 is a hybrid disc, at the stage of the F113 is setting operation shown in Fig, in a single area in which or from which data is written or read.

The operation of determining the physical characteristics shown in Fig or 50, and the operation of the configuration shown in Fig, which may be performed not only when the disc is inserted, but also when the power is turned on when the drive is installed in the block 70 of the disk drive, or when the command for the host computer 80.

Originally on CD-R or CD-RW is not recorded table of contents, and the block 70 of the disk drive writes information in the table of contents in accordance with the data write operations to disk. Writing the table of contents shown in Fig.

On Fig shows a graphical diagram of the program processing after recording data in the area of program disk 90, which serves as a CD-R or CD-RW. Stage F401 and F402 indicate a write operation in response to a command from the host computer 80.

After recording the user data, at the stage F403, the controller 10 creates data in the table of contents in accordance with the content of the recorded data.

Thus, the controller 10 creates information such as the address of each track, from the values recorded in the area of program memory, and creates physical information, such as shown in Fig-39. In this case, the physical information determined from information lobularia.

Namely, the information indicated by the position (b) on Fig created from a physical information read from the information lobularia. The value of the information about the material, indicated by position (b) on Fig, created on the basis of the data Mat is the Rial, shown in Fig. The value of the media type (in this case, whether the disc is a CD-R or CD-RW, and density disk), indicated by position (b) on Fig, is based on the density of the disk shown in Fig, physical structure, shown in Fig, and the type of disc special information 1 shown in Fig.

The linear velocity and the step between tracks, indicated by position (b) on Fig can be created based on the density of the disk shown in Fig, special information 1 and 4, shown in Fig, and configuration determined after recording the user data. Moment of inertia, denoted by position (b) on Fig, is based on the moment of inertia shown in Fig. Configuration indicated by the position (b) on Fig, is created based on the configuration of the disk shown in Fig. The size of the disk, indicated by position (b) on Fig, is created based on the configuration of the disk shown in Fig, and the moment of inertia shown in Fig.

However, it is not essential that the information indicated by the position (b) on Fig, was created as stated above.

Then, at the stage F404 in the area of input records the frame subcode having created the information in the table of contents.

Accordingly, in this embodiment, relating to the CD-R or CD-RW without table of contents, physical characteristics (physical the information) such disk can be determined using information lobularia. When the subsequent recording information in the table of contents, physical characteristics, certain of the information lobularia, written to disk as an information table of contents. This provides the possibility of determining the physical characteristics of the disk from the table of contents, as well as information obtained from lobularia.

Block of the disk drive, function recording made with the possibility of decoding information lobularia. However, some blocks of the disk drive to read-only does not have a function of decoding information lobularia. Thus, by transferring the physical information of the disc is obtained from information of lobularia in the data tables of contents, such blocks of the disk drive to read-only get the opportunity to determine the physical information of the disc and accordingly perform the configuration.

7. Examples DVD

In the previous embodiment described the invention as applied to CD-R and CD-RW. This invention can be used for other types of drives, and physical characteristics, such as moment of inertia and the configuration of the drive, other drives can also be written on them. In this case, can be provided benefits similar to those given in the previous embodiment, when performing write operations or read through the Yu recording device or reader device.

As an example, other types of drives below is a description of a DVD. Developed recordable DVD format DVD-RW, DVD-R, DVD-RAM and DVD+RW, described below.

Although the detailed configuration of the drive unit of the disk device read/write), compatible with the DVD format, is slightly different from the configuration of the block 70 of the disk drive that is compatible with disc format CD, shown in Fig, due to differences in data formats, the method of modulation/demodulation, optical characteristics, etc. but the basic configuration of the drive unit DVD is similar to the block CD. Thus, its description may not lead. As well as in the operations described with reference to Fig-54, the actuator disk is compatible with DVDs, described below, is able to determine the physical characteristics of the disc, to provide a different configuration in accordance with the physical characteristics and to perform, respectively, the write operation and read.

Below is a description of the recording on the DVD its physical characteristics.

7-1. DVD-RW, DVD-R

On a DVD-RW, which is a disk rewritable using a recording technique with phase change, and on the DVD-R disc, which is a disk for reading immediately after write (DRAW) (the La disposable write and multiple read-many (WORM)) using the technique of modifying organic pigment, the disk form valuerevenue track as a preliminary format, and the space located between the tracks, pre-formed notch (called in the following "preliminary excavation at the site").

Track woolerina is used to control the rotation of the disk and to generate the basic clock pulses of the recording. Preliminary excavation at the site is used for determining the exact position of each bit and to obtain various items of information relating to the disk, such as a prior address. Thus, information about the physical characteristics of the disk is recorded in the preliminary excavation at the site.

On Fig shows the structure of the disk, which serves as a DVD-RW or DVD-R.

Zone input on the inner periphery of the disc is located at a distance from 45,2 mm to 48 mm from the center of the disc. Area o is formed at a distance from 116 mm from the center of the disc. The area between the area of the input zone and the output serves as an area of application in which the recorded actual data.

In the area of information, including the area of the input zone and zone output, formed groove (guide groove) with a form of lobularia (meander), which forms the data track. Additionally, preliminary form the recess LLP on the site, as shown on Fig, in a predetermined position L between the grooves G, G.

Information sabaliauskas grooves G and the information is preliminary excavation LLP on the site was produced using the so-called push-pull signal representing the light reflected from the disk and detected by the optical pulling tool.

Below is a description of the structure of pre-formatted data recorded in the pre-notch LPP on the site.

On figa shows the preview of the hole, which is the minimum block of pre-formatted data as a preliminary excavation of the LPP on the site. The frame of the preliminary excavation has 12 bits, consisting of a 4-bit relative address and 8 bits of user data. Then 16 frames pre-excavation (PF0-PF15) form one unit preliminary excavation. Consisting of a 4-bit relative address of a particular frame of the preliminary excavation specifies the address of the relevant personnel prior excavation (PF0-PF15).

The pre-grooves formed part And consisting of 6 frames PF0-PF5 preliminary excavation, and part B, consisting of 10 frames PF6-PF15 preliminary excavation.

Since one frame prior excavation has 8 bits of user data, the part a is 48 bits (6 bytes) of user data. As shown in figv of 6 bytes of user data 3 bytes are used as error correction code addresses the Loka and 3 bytes are used as parity for part A.

Part b, which consists of 10 frames PF6-PF15 preliminary excavation has 80 bits (10 bytes) of user data. As shown in figs, user data of 10 bytes are the ID field identification of 1 byte, the disc information of 6 bytes and the parity In 3 bytes for part Century

As shown in Fig, information about the disk of 6 bytes is changed in accordance with the ID field identification. In the pre-grooves in which the identification field is ID0, 3 bytes 6 bytes of information on the disk is used to record the value equal to the address of a block code error correction part A. the pre-grooves in which the ID field is set to ID0, is formed on the entire area of the disk.

The pre-grooves in which the ID field has one of the values ID1-ID5, formed in the zone input. In the pre-grooves in which the ID field is set to ID1, as disc information of 6 bytes written code of application or physical data. In the pre-grooves in which the ID field has a value of ID2 as disc information of 6 bytes written recommended ORS code or code strategy account (WS1). In the pre-grooves in which the ID field is set to ID3, as information about the disc recorded identifier of the manufacturer (MID1). In the pre-grooves in which the ID field is set to ID4, as the e information about the disc recorded identifier of the manufacturer (MID2). In the pre-grooves in which the ID field is set to ID5, as disc information of 6 bytes written strategy code entry (WS2).

Details of the pre-grooves in which ID is ID1 shown in Fig. In this case, information about the disk of 6 bytes of user data frames PF7-PF12 pre-grooves are formed from the 1-byte code of the application, 1 byte physical disk data, 3 bytes of the address of the last zone, is configured to write data 1 byte code version of part/extension.

Contents 1 byte (eight bits) of the physical code disc set, as shown in figa.

Of the eight bits b0-b7, bit b7 indicates information about the step between tracks. When the value of the bit b7 is "0", the step between tracks equal to 0.80 μm. When the value of the bit b7 is "1", the step between tracks is equal to 0.74 μm. Bit b6 is the reference speed. A value of "0" indicates that the reference speed is of 3.84 m/s, while the value "1" indicates that the reference speed is equal to 3.49 m/s Bit b5 denotes the size of the disk. A value of "0" indicates that the size of the disc is 12 cm, while the value "1" indicates that the disk size is 8 see Bits b4 represents the reflection coefficient. A value of "0" indicates that the reflection coefficient is in the range from 45 to 85%, while the value "1" indicates that the ratios are the HT reflection is in the range from 18 to 30%.

The type of media recorded in bit 2 and bit 1. When the value of the bit b2 is "1", then the media refers to the type of media with phase change. When the value of the bit b2 is "0", then the media is a different type. When the value of the bit b1 is "1", then the media refers to the media type, made writable. When the value of the bit b2 is "0", then the media refers to the media type, made rewritable.

The moment of inertia is written in bit b3 and the bit b0. When the values of bit 3 and bit 1 is, respectively, J1 and J2, then the moment of inertia can be specified by two bits J1 and J2, as shown in figv.

When the values of J1 and J2 are "00", then the moment of inertia is less than 0.01 g·m2. When the values of J1 and J2 are "01", the moment of inertia is equal to or more than 0.01 g·m2however , less than 0.02 g·m2. When the values of J1 and J2 are "10", the moment of inertia is equal to or more than 0.02 g·m2however , less than 0.03 g·m2. When the values of J1 and J2 are "11", the moment of inertia is equal to or more than 0.03 g·m2.

As mentioned above, for DVD-RW and DVD-R physical information recording medium is recorded in the zone input in the form of pre-excavation LPP on the site. This allows the actuator disk accurately and easily determine the size of the disk, the moment of inertia, the step between tracks is, linear speed, media type, etc. In accordance with this, the block of the disk drive is able to perform the appropriate configuration in accordance with the physical characteristics of the disk, thereby providing a corresponding proper operation of the read/write.

7-2. DVD-RAM

In the DVD-RAM disc, which is made rewritable disc format DVD using technology changes phase during recording, the recording with a high density by using the recording method Playground/groove. In the DVD-RAM injection zone includes a portion in which the recorded information management in the form of embossed pits, and rewritable information. Information about the physical characteristics of the disk can be written in the area of the embossed grooves fields.

On Fig shows the lineup of DVD-RAM disc. As shown in Fig, the water area is formed at a distance of 45.2 mm from the center of the disc. The area between 45,2 and 48.0 mm is extruded grooves in which the recorded information management. Zone input is passed on to a rewritable area in which data is recorded. Zone output is formed from 115,78 mm to 117,2 mm. Zone between the injection zone and the zone output is used as the area of the program that records the real data.

On Fig shows a detailed configuration of the zone input.

Zone input obrazovaniya greater part of the area has been squeezed out of the data the mirror area and a rewritable area. In the area of the embossed data sequentially one after the other are the starting zone, the zone reference code from one block (block error correction code), the buffer zone of the block 31, the area management data of 192 blocks and buffer area of 32 units.

Then, in the rewritable area after the mirror zone (connecting area) arranged in series one behind the other area of the protection paths of 32 units, area test drive of 64 blocks, zone test drive of 112 units, the area of the protection paths of 32 units, area identify the drive of 8 units, area DMA1 error correction of 8 units and area DMA2 error correction of 8 blocks.

On Fig shows the configuration of each of the 192 units zone control data zone embossed data.

One block is formed of 16 sectors from sector 0 to sector 15. One sector is 2048 bytes. In sector 0 of the recorded information on the physical format. Sector 1 contains information about the manufacturer. 192 block with the specified configuration recorded in the data area of the control.

The content information on the physical format (2048 bytes) is partially shown in Fig. In the initial byte in position 0 bytes sector of 2048 bytes recorded media type and version part.

In the next byte in the byte location 1 recorded the moment of inertia, the disk size and maximum near the banks of the transfer. This information is, for example, 8 bits from bit 0 to bit 7, as shown in Fig, in which the maximum transfer rate recorded in the four bits b0 to b3, the size of the disk is recorded in two bits b4 and b5, and the moment of inertia recorded in two bits b6 and b7. As for the two bits b4 and b5, which is the size of the disk, the value "00" may be a disc of 12 cm, while a value of "01" may indicate a disk of 8 cm, and other values may be back. As an alternative solution, using two bits b4 and b5 you can specify a combination of disk size and disk configuration instead of only the size of the disk. Two bits b7 and b6, indicating the moment of inertia can be represented by the values of J1 and J2, respectively, and the moment of inertia can be specified, as shown in figv.

As shown in Fig in position byte 2 (one byte) recorded the disk structure in the form specified definition. In the status byte 3 (one byte) recorded a density of records in the specified definition. In position 32 bytes (one byte) recorded the ID of the disk type.

As for the DVD-RAM disc, the physical information of the storage medium is written in the area of the embossed data zone input. In line with this, the block of the disk drive capable of accurately and easily determine the size of the disk, the moment of inertia, the step between tracks, linear speed, media type, etc. is so ensures compliance with appropriate settings in accordance with the physical characteristics of the disk, thereby ensuring the proper operation of the read/write.

7-3. DVD+RW

In DVD+RW, which is rewritable disc using technology changes phase during recording, various items of information recorded on the disk using sabaliauskas groove modulated in phase. Thus, information about the physical characteristics of the disk drive is included in the ADIP information that should be recorded in the form of Vouliagmeni groove modulated in phase.

Below is a description of the information lobularia modulated in phase with links to figa, V and S. Eight oscillations form one ADIP unit. Then oscillations modulated in phase so that are created in the specified sequence of positive vibrations PW and negative fluctuations in the NW. In line with this, the ADIP unit is a clock group, the data "0" or data "1".

Peak positive lobularia PW directed toward the inner periphery of the disk, while the peak negative lobularia directed toward the outer periphery of the disk.

On figa shows a synchronization group (synchronization unit ADIP). The first four variations (W0-W3) are negative fluctuations NW, and lastly the e four variations (W4-W7) are positive fluctuations PW.

On FIGU shows the ADIP data unit, data indicating "0". The first oscillation W0 is negative fluctuation NW, which serves as bit synchronization, and the next three vibrations (W1-W3) are positive fluctuations PW. In the last four variations two variations (W4 and W5) are positive fluctuations PW, and the remaining two oscillations (W6 and W7) are negative fluctuations NW. With this arrangement, data ADIP represent data "0".

On figs shows the ADIP data unit, data indicating "1". The first oscillation W0 is negative fluctuation NW, which serves as bit synchronization, and the next three vibrations (W1-W3) are positive fluctuations PW. In the last four variations two variations (W4 and W5) are negative fluctuations in the NW, and the remaining two oscillations (W6 and W7) are positive fluctuations PW. With this arrangement, data ADIP represent data "1".

Above the ADIP blocks have the following structure data.

Information ADIP unit, recorded in the form of Vouliagmeni groove formed by two synchronization frames as one unit, shown in Fig. Two frames of the strategy records have 93 fluctuations.

One oscillation has a 32 channel bits (T) and in accordance with this one frame synchronization equal 1488 channel bits. One ADIP unit is formed by eight oscillations with m is dulala phase among the two frame synchronization (93 fluctuations). The remaining 85 fluctuations are monotonous fluctuations, which is not phase modulated.

52 ADIP unit form the ADIP word, which is equivalent to four physical sectors. The ADIP word structure shown in figa.

The ADIP word, which is formed of 52 ADIP blocks, each of which has 8 vibration (W1-W7), has information of 52 bits. The ADIP word consists of one ADIP unit synchronization and 51 block ADIP data. Accordingly, as shown in figa, 52 bits for recording information 51 bits can be used bit 1 - bit 52 data that is different from the word synchronization (bit 0 data).

On FIGU shows the structure of the ADIP word of 52 bits. 22 bits from bit 2 data to bit 23 data used to record the physical address. The physical address is provided for each ADIP word. Eight bits from bit 24 data to bit 31 of the data used to record the added data. Bits from the 32 bits of data to bits 51 data are used as data error correction code.

As for the added data of 8 bits for each ADIP word, 256 added data collected from consecutive 256 data ADIP, thus forming a table of 256 bytes. In such a table may be recorded information about the physical format such as shown in figa.

On figa shown only the provisions of bytes from 0-30 256 bytes and the remaining bytes of the put is th byte 31-256 not shown.

One byte at byte position 0 is used to record the category of the disk and the version number. One byte at byte position 1 is used to record the size of the disk. One byte at byte position 2 is used to record the structure of the disk. One byte at byte position 3 is used for recording areal density. Twelve bytes in position bytes 4-15 is used to record the location of the zone data. One byte at byte position 17 is used to record the moment of inertia and disk configuration.

For example, as shown in figv, the byte location of the 17 two bits b7 and b6 are used to write the moment of inertia, and two bits b5 and b4 are used to write the disk configuration.

When the bits b7 and b6 presents the values of J1 and J2, respectively, the moment of inertia can be specified, as shown in figa. The configuration information of the disc can be recorded using the definition shown in Fig, using two bits b5 and b4.

As mentioned above, in the case of DVD+RW physical information of the disc recorded in the form of Vouliagmeni groove modulated in phase. This allows the actuator drive correctly and easily determine the disk size, disk configuration, the moment of inertia, media type, etc. the result is the implementation of suitable configuration in accordance with the physical characteristics and thereby done is the corresponding operations of the read/write.

Although this invention is described with references to embodiments of the that are presently considered to be preferred, various modifications of the actuator disk operations unit, the information structure of lobularia, data structures sub-Q, etc.

1. The media containing the track record formed by the thread grooves on the surface of the carrier, and these notches are written therein, with said information contains basic data and subcode, in which recorded information about the physical characteristics of these media.

2. The information carrier according to claim 1, in which point information representing the content of the given information is within the specified subcode, and the information about the physical characteristics recorded in accordance with certain values of point information.

3. The information carrier according to claim 1, in which the information about the physical characteristics recorded within the specified subcode zone input.

4. The information carrier according to claim 1, in which the information about the physical characteristics contains information relating to the material specified media.

5. The information carrier according to claim 1, in which the information about the physical characteristics contains information relating the uwsa to the type of the specified media.

6. The information carrier according to claim 1, in which the information about the physical characteristics contains information related to the linear speed of the specified media.

7. The information carrier according to claim 1, in which the information about the physical characteristics contains information related to step between tracks of the specified media.

8. The information carrier according to claim 1, in which the information about the physical characteristics contains information related to the moment of inertia of the specified media.

9. The information carrier according to claim 1, in which the information about the physical characteristics contains information related at least to the configuration and size of the specified media.

10. The information carrier according to claim 1, wherein said subcode recorded in CD format.

11. The media containing the track record formed by the thread grooves on the surface of the carrier, and these notches are recorded therein, and said information contains basic data and subcode, with the specified media contains many isolated areas of the read/write head, the physical characteristics are different, each of these individual areas of the read/write head consists of a zone input zone program and zone output, which is wbcode zone input of each of these individual zones of the read/write record information about the physical characteristics of the corresponding unit area of the read/write, and written information about the initial position, indicating the position where the injection zone following a single zone of the read/write.

12. The storage medium according to claim 11, in which subcode zone input of each of these individual areas recording/reading of recorded information about the target position, indicating the position in which the end zone output corresponding to a single zone of the read/write.

13. The storage medium according to claim 11, in which subcode recorded in CD format.

14. The recording device is compatible with storage media containing a track record formed by the thread grooves on the surface of the carrier, and these notches are written therein, with said information contains basic data and subcode, in which recorded information about the physical characteristics of these media, with the recording device includes a determining means configured to determine the physical characteristics of the specified media information by reading information about the physical characteristics of the specified subcode; means to control entry, made with the possibility of making settings for a write operation in accordance with the physical characteristics determined using the specified defines the medium is VA, and to ensure that write operations.

15. The recording device 14, in which the specified subcode recorded on the specified media to the CD format.

16. The recording device is compatible with storage media containing a track record formed by the thread grooves on the surface of the carrier, and these notches are written therein, with said information contains basic data and subcode, with the specified media contains many isolated areas of the read/write head, the physical characteristics are different, each of these individual areas of the read/write head consists of a zone input zone program and zone output, which subcode zone input of each of these individual zones of the read/write record information about the physical characteristics of the corresponding unit area of the read/write and written information about the initial position, indicating the position where the injection zone following a single zone of the read/write head while the recording device contains a means of access control is configured to determine the location of the zone, enter the following single zone of the read/write of information on the start position recorded in the area of the input current of a single zone of the read/write head, and on which I access in a certain position; determining means configured to determine the physical characteristics of the corresponding unit area of the read/write by reading information about the physical characteristics of the specified subcode zone input every single zone of the read/write head in accordance with the access controlled by the specified access control; control recording, made with the possibility of making settings for write operations for each individual zone of the read/write head in accordance with the physical characteristics determined using the determining means, and to ensure that write operations.

17. A recording device according to item 16, wherein said subcode recorded on the specified media to the CD format.

18. The reader that is compatible with storage media containing a track record formed by the thread grooves on the surface of the carrier, and these notches are written therein, with said information contains basic data and subcode, in which recorded information about the physical characteristics of these media, but such a reading device includes a determining means configured to determine the physical characteristics of the specified media in the information by reading information about the physical characteristics of the specified subcode; the management tool reading made with the possibility of making settings for read operations in accordance with the physical characteristics determined using the determining means, and to ensure that read operations.

19. Reader on p in which the specified subcode recorded on the specified media to the CD format.

20. The reader that is compatible with storage media containing a track record formed by the thread grooves on the surface of the carrier, and these notches are written therein, with said information contains basic data and subcode, with the specified media contains many isolated areas of the read/write head, the physical characteristics are different, each of these individual areas of the read/write head consists of a zone input zone program and zone output, which in the specified subcode zone input of each of these individual zones of the read/write record information about the physical characteristics of the respective unit recording area/read and record information about the initial position, indicating the position where the injection zone following a single zone of the read/write head, with the specified reader contains environments the creation of access control, made with the possibility of determining the position of the zone input following a single zone of the read/write of information on the start position recorded in the area of the input current of a single zone of the read/write head, and to provide access in a certain position; determining means configured to determine the physical characteristics of the corresponding unit area of the read/write by reading information about the physical characteristics of the specified subcode zone input every single zone of the read/write head in accordance with the access controlled by the specified access control; and management tool reading made with the possibility of making settings for read operations for each single zone records/read in accordance with the physical characteristics determined using the determining means, and to ensure that read operations.

21. A reading device according to claim 20, wherein said subcode recorded on the specified media to the CD format.



 

Same patents:

FIELD: engineering of devices for information storage.

SUBSTANCE: device for information storage contains disks with information carrying layer mounted with possible rotation relatively to common axis, disks rotation drive, reading and/or recording head, positioned on the side of end of one of edge disks and directed towards the latter by its active zone, and also drive for moving aforementioned head in plane, parallel to rotation plane of disks. Information carrying layer at least on one disk, positioned on the side of head, is made with forming of window, transparent for signal, emitted and/or read by head and having shape matching movement trajectory of head, and disks rotation drive is made with possible independent rotation of disks and holding in position, providing for positioning of window in front of active zone of head.

EFFECT: increased efficiency.

8 cl, 4 dwg

FIELD: engineering of information carriers and appropriate reading and recording devices.

SUBSTANCE: variants of information carrier contains information about its configuration recorded thereon as well as information about inertia moment of current information carrier. Recording device contains means for determining physical characteristics of utilized information carrier by reading information about configuration and information about inertia moment from wobbulated groove of information carrier, and recording control means, applying corrections for performing recording process in accordance to physical characteristics of information carrier. Reading device contains means for determining physical characteristics of information carrier by reading information about configuration and information about inertia moment, and recording control means, applying corrections for performing reading operation in accordance to physical characteristics of information carrier.

EFFECT: simple and precise process of determining physical characteristics of information carrier, possible adjustment of reading and recording operations.

4 cl, 93 dwg

FIELD: technologies for manufacturing optical disks for storing information, in particular, development of fluorescent substance and method for manufacturing WORM-type optical disks based on it.

SUBSTANCE: fluorescent multilayer substance on basis of organic dyers with polymer linking component for optical data storage disks of type WORM with fluorescent reading, in accordance to first variant, has two-layered light-sensitive polymer composition inside a track, formed in transparent film made of refractory polymer. First layer has hard solution of fluorescent dyer. Second layer is a combined solution of light absorbent and fluorescence extinguisher. Polymer linking component belonging to first layer has substantially reduced melting temperature in comparison to polymer linking component belonging to second layer. In accordance to second variant, fluorescent multilayer substance is made sensitive to polarization of laser beam, enough for controlling processes of reading and recording information in a fluorescent WORM disk due to polarization of laser beam. Also provided is method for manufacturing one-layered optical disk of type WORM, basically including forming of a fluorescent layer in two stages. Firstly, lower semi-layer is formed, containing fluorescent dyer, and then - upper semi-layer, containing non-fluorescent dyer, or at the beginning lower semi-layer is formed, containing non-fluorescent dyer, and then - upper semi-layer, containing fluorescent dyer. Non-fluorescent dyer is selected in such a way, that its absorption area mainly coincides with spectral absorption area and/or fluorescence area of fluorescent dyer.

EFFECT: improved efficiency of recording/reproducing systems and information preservation on basis of WORM-type optical disk with fluorescent reading.

3 cl, 2 dwg, 3 ex

FIELD: optical discs that can be manufactured with the use of one and the same process parameters.

SUBSTANCE: the optical disc for recording and/or reproduction has an area of an initial track, user's data area and an area of the final track. Each of the areas of the initial track, user's data and final track includes recording grooves and fields between the recording grooves produced in them. The recording grooves and the fields between the recording grooves include curves produced at least on one side of the recording grooves and fields between the recording grooves. The curves in the area of the initial track, in the area of the user's data and in the area of the final track are modulated by means of various methods of modulation.

EFFECT: enhanced reliability of signal recording and reproduction.

64 cl, 18 dwg

FIELD: optical data carriers.

SUBSTANCE: device has tracks, each of which is comprises multiple recesses, formed on basis of first data, meant for recording, and areas between recesses. Multiple recesses are displaced from track center on basis of second data, at the same time recesses cross central position of track with given periodicity. First data may be recorded analogically to compact disk data. Second data may be separated from signal of track tracking error. Second data may be used for copy protection in relation to first data, while amount of first data, which can be recorded on carrier, does not decrease when recording second data, and as a result of recesses displacement range being set within limits of preset value in range, wherein no track tracking displacement occurs, first data can be played back by existing players to provide for compatibility of playback.

EFFECT: higher efficiency.

8 cl, 12 dwg

FIELD: optical data carriers.

SUBSTANCE: device has cation dye or mixture of cation dyes with optical characteristics, changed by means of recording beam, an at least one substance with functions of damper and phenol or substituted phenol with one hydroxide group or more, while it additionally contains phenol or substituted phenol in form of phenolate ion, forming a portion of anions for dye cations, as a stabilizer. Data carrier can contain anionic metal-organic thyolene complex as damper, which forms other portion of anions for dye cations.

EFFECT: higher stability, higher durability, lower costs.

5 cl, 1 tbl, 3 ex

FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

6 cl, 44 dwg

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

The invention relates to a memory means containing at least one set of data in memory

The invention relates to the field of optical recording

FIELD: engineering of information carriers and appropriate reading and recording devices.

SUBSTANCE: variants of information carrier contains information about its configuration recorded thereon as well as information about inertia moment of current information carrier. Recording device contains means for determining physical characteristics of utilized information carrier by reading information about configuration and information about inertia moment from wobbulated groove of information carrier, and recording control means, applying corrections for performing recording process in accordance to physical characteristics of information carrier. Reading device contains means for determining physical characteristics of information carrier by reading information about configuration and information about inertia moment, and recording control means, applying corrections for performing reading operation in accordance to physical characteristics of information carrier.

EFFECT: simple and precise process of determining physical characteristics of information carrier, possible adjustment of reading and recording operations.

4 cl, 93 dwg

FIELD: devices for video data reception.

SUBSTANCE: according to method of recording of video data onto data carrier, video information is recorded in several video-clips in format of digital video signals, which video information is received from recording camera of video camera. Data on navigation is recorded for navigation from clip-files into first file where navigation data is recorded into, The second file is recorded which file has to be at least one of mentioned clip-files and at least some part of corresponding first file. Random access can be got to video information and video information can be reproduced at any required moment of time.

EFFECT: simplified access; improved reliability of operation.

24 cl, 7 dwg

FIELD: engineering of devices for recording and reproducing information.

SUBSTANCE: in tree-like system of keys distribution renewed data of main key and carrier key are transferred together with key renewal block. Key renewal block is such, that each one of devices, connected as leaves of tree-like structure, has leaf key and limited hub key. Concrete key renewal block may be generated for group, identified by certain hub, and assigned to group for limiting device, for which it is possible to renew key. Any device not belonging to group can not decode the key, due to that it is possible to provide protection of key distribution. In particular, in a system using main key with controlled generation, it is possible to distribute main key renewed by means of key renewal block.

EFFECT: minimized data distribution load.

9 cl, 55 dwg

FIELD: method and device for recording and reproducing information.

SUBSTANCE: block key for encoding block data is generated with utilization of input time mark, connected to each packet, included in transport stream in accordance to packet input time. Input time mark contains random data, depending on input time, and thus it is possible to generate unique block key, which increases data protection from encryption analysis. Block key is generated on basis of combination of mark of input time with key, unique for device, information carrier or the like, such as main key, unique disk key, unique title key or the like. Because for generation of block key input time mark is utilized, it is possible not to assign zone on data carrier for storing encoding key for each block.

EFFECT: increased data protection quality.

7 cl, 41 dwg

FIELD: method and device for processing AV information, engineering of data carrier for recording a file including information provided for clarification purposes in graphic user interface, information of main and auxiliary reproduction routes, information about connection between appropriate reproduction domains along main route.

SUBSTANCE: type CPI_type is described in PlayList. CPI_type contains type EP_type and type EP_map_type. If position of I-image can be determined, type EP_map_type is utilized, if it can not be determined, type EP_map_type is utilized. Therefore, recorded AV stream data are subject to analysis of I-image and AV data of stream recorded without designation of I-image position may be controlled jointly.

EFFECT: possible joint controlling of AV stream, for which high speed reproduction is possible, and AV stream, for which such a possibility is not available, and also repeated recording is possible.

17 cl, 123 dwg

FIELD: methods and devices for memorization and processing of information containing video images following one another.

SUBSTANCE: from each image recorded prior to current time appropriately at least one image area is selected and aperture video information is recorded with placement information. from video-information at least one mixed image is generated with consideration of appropriate placement information. Mixed image is utilized for display in accordance to movement estimation, movement compensation or error masking technology frames.

EFFECT: decreased memory resource requirements for memorization of multiple previously received images.

3 cl, 4 dwg

FIELD: engineering of data recording device, which makes it possible to control data even if data recorded on carrier are subjected to editing.

SUBSTANCE: first means for detecting on data recording device is meant for detecting information of supporting time for certain known data flow. First generating device is meant for generation of first discontinuous information, representing discontinuous characteristic of first time information, generated on basis of detection result, second discontinuous characteristic information, representing discontinuous characteristic of second time information, denoting packets receipt time, identification information for first array of packets, wherein gaps in noted first time information are absent as well as shift values for aforementioned identification information. onto data carrier aforementioned first discontinuous characteristic information is recorded, aforementioned second discontinuous characteristic information is recorded together with aforementioned shift value onto aforementioned information record carrier.

EFFECT: increased quality of data control and their reproduction when performing editing operations.

43 cl, 68 dwg

FIELD: optical data carriers.

SUBSTANCE: information of manufacturer, recorded by recording controller for recording manufacturer information, is used for supporting specific manufacturer-provided functions, and has an individual format, incompatible to those of other manufacturers. Also, manufacturer information recorded on data carrier contains identification information of recording device manufacturer, which can include model code of recording device. Manufacturer information recorded by device can be used during recording, editing or reproduction of data.

EFFECT: shorter time span, required for determining, whether information units of manufacturer, recorded on data carrier, are valid for current recording and/or reproducing device.

6 cl, 8 dwg

FIELD: optical data carriers.

SUBSTANCE: method includes stages, during which manufacturer information is recorded on carrier, which is used for supporting specific function of manufacturer, while manufacturer information contains identification information of recorder manufacture, which recorded and/or modified data of data carrier, different from identification information before recording or modification.

EFFECT: higher speed of operation, higher efficiency.

6 cl, 8 dwg

FIELD: stereophonic signals recording/reproduction.

SUBSTANCE: data signal has first portion and remainder portion. Said first portion is combined with stereophonic signal for receiving compound signal, recorded in said first channel on said data carrier. Remainder portion is recorded in second channel on said data carrier.

EFFECT: higher data carrier capacity.

4 cl, 6 dwg

FIELD: protection of video information against unauthorized copying.

SUBSTANCE: proposed method using watermarks to protect video information against unauthorized copying by changing scale of pattern in the course of copying includes introduction of watermark in original video signal with different scales. Watermark is maintained in each scale for preset time interval sufficient to enable detector circuit in digital-format video recorder to detect, extract, and process information contained in watermark. Watermark scale is changed by end of preset time interval preferably on pseudorandom basis to ensure appearance of each of all scales in predetermined scale variation range as many times as determined in advance. In this way definite scale possessing ability of watermark recovery to initial position and size can be identified and used for watermark detection.

EFFECT: enhanced reliability, facilitated procedure.

24 cl, 7 dwg

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