Read-only information medium - device and reading method

FIELD: information technology.

SUBSTANCE: method of data organisation similar to that of a RAM disc, is adapted for ROM disc in order to make the ROM disc compatible with the RAM disc. According to this method, buffer areas are formed, used as opening and closing areas for preceding and successive RUB (writable blocks) respectively, which are used as a reading/writing measurement unit. Besides, in the areas separated from each other by a distance of the interval length between the synchronising data in the successive RUB frames, the synchronising data (SA) fragments are written in such manner that the synchronising data in the signal read from the ROM disc always appear with equal intervals, which ensures the advantage in organisation and synchronisation.

EFFECT: possibility to create the ROM disc compatible with the RAM disc and having advantages in the synchronisation system.

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The technical field to which the invention relates.

The present invention relates to storage media such as optical disk, and more specifically, refers to the data format on the storage medium is read-only. In addition, the present invention is connected with the reader and method of reading, which is able to copy media, read-only, and the media on which it is possible to write/read information.

Background of the invention

As a technology for recording and reading digital information known technology writes data that uses the optical disk, for example using a magneto-optical disk as a storage medium. Examples of optical disks are CD (compact disc), MD (MiniDisc) and DVD (digital versatile disk). The optical drive is the common name of the media, made in the form of a disk which is a thin metal plate, protected by plastic, with these carriers, you can read data on the change of the signal reflected from the surface of the disk.

There are two types of optical discs, namely disks, read-only and recordable drives that can write data to the user. Examples of optical disks that are available is only for reading, can serve as known to date, CD, CD-ROM and DVD-ROM. On the other hand, examples of a recordable optical disks are also well known for MD, CD-R, CD-RW, DVD-R, DVD-RW, DVD+RW and DVD-RAM. On the recordable optical disc, you can record the data by some method of recording, such as a magneto-optical recording method, the recording method with phase transition or a method of recording with the transition of the dye in the film. The way you write with the transition of the dye in the film is also known as the way a single record in which information is written to disk only once, and it is impossible to record other data on top of an already recorded. Therefore, the method of recording with the transition of the dye in the film is the best for when you save the data. On the other hand, the magneto-optical recording method and a recording method with phase transition allows to overwrite other data. Thus, the magneto-optical recording method and a recording method with phase transition applied in various cases, such as recording a variety of information, including music data, image data, game software and programs.

In addition, recently has been developed an optical disk of high density, called DVR (data and video). The development was a significant increase in the volume of the data, written to disk.

The disk structure of high density, such as DVR, includes a protective layer thickness of approximately 0.1 mm, and the thickness is part of the overall thickness of the disk. In this structure, written and read mark with phase change, while the read and write by applying a combination of laser with a wavelength of 405 nm and the objective lens with the numerical aperture is 0.85. Laser with a wavelength of 405 nm is the so-called blue laser. In this structure, the interval between tracks is equal to 0.32 microns, and the linear density is 0.12 microns per bit. With this structure, the write/read operation reads the blocks whose size is 64 KB (kilobytes). When the effectiveness of the format in 82% of the disk having the diameter of 12 cm, allows you to record up to 23.3 GB (gigabytes) of data, and to read previously written data.

Additionally, during the same format, in the case of increasing the linear density to 0,112 μm/bit, the volume of the disk for recording/reading can be increased to 25 GB.

Moreover, when the multi-layer structure, in which there are multiple recording layers, it is possible to achieve much larger volume writable/readable data. For example, when a multilayer structure consisting of two recording layers, the volume is a writable/readable data is doubled and is 466 GB to 50 GB.

Incidentally, for a disk, read-only, among the above-mentioned various optical disk, the information being recorded blocks of error correction in cavities, such as extruded hollows created in advance in the ROM. As explained above, an example of a disk, read-only, is DVD-ROM.

In addition, in accordance with known conventional data format on the disk, read-only, data is recorded in a continuous area which does not divide into parts blocks with error correction. In this format the blocks of error correction are used as one block with error correction, it is assumed that between blocks is not created region pair (or buffer area).

Much like the disc, read-only, data is written to and read from a recordable disk or a writable/readable disk) single blocks with errors.

In this case, however, given the possibility of recording random access to data between blocks, you can create a region pair.

The use of regions of the pair implies the following advantage: random access to blocks in the device for recording/reading can be hardware implemented a cheaper way compared with f is the rmat data representation, without presupposing the existence regions of the pair.

On the other hand, if the method of recording blocks in contiguous zones without pairing data read operation is not sustainable so long as PLL (phase-locked loop circuit) clock reading does not go into a stationary regime, thus there is the possibility of errors when reading data. Therefore, from the point of view of the random access this method has the drawback.

However, in the case of the disk, read-only, not necessarily to take into account the possibility of recording with random access. Thus, the area mates are not needed.

Mainly for this reason, the disk is read-only and recordable/readable disc disks are of the same type. For example, a DVD-ROM is used as the drive is read-only and DVD-RAM, used as a writable/readable disc, are disks of the same type. Another example is a writable/readable disc and the disc, read-only, and which is a disk with a high density (DVR), which was mentioned above.

From disks belonging to one type, it is required that they are compatible when reading. If there are differences in the way of organizing data (or data format) between the drive is read-only and not available the areas mates and a writable/readable disc having a region pair, the compatibility can not be.

That is, in this case, a device for reading a disc, read-only and recordable/readable disk should contain the components for the drive, read-only, and components for writing in/reading disk, and the device must switch from one set of components to another set of components, depending on which disk is used for reading information. Such components include a circuit generating a clock signal, the synchronization circuit and other hardware blocks, the blocks of the hardware-implemented software and blocks software.

In short, to maintain compatibility it is necessary to provide large load on the configuration of the reader.

The invention

Thus, the aim of the present invention is to propose a storage medium, a read-only format that is compatible with recordable/readable media.

In the media, read-only, proposed in the present invention as media, read-only, and on which you can write later only read data, to the which are presented in the form of a sequence of blocks, each of which is used as a unit of recordable/readable information, each of the data blocks contains an opening region data that serves as the primary buffer region, the cluster containing several consecutive frames, each of which, in addition to the basic data is synchronizing data, and closing the data area that serves as the destination buffer area, and the blocks are written to storage media, read-only, in compliance with the format, providing that at least part of the synchronization data is recorded in separated from other areas at the start and end of buffer areas that reserved for respectively opening region data and end data region on the border between any two consecutive blocks, the distance between the parts of the clock data is equal to the length of the interval between synchronizing data in successive frames. This format is built for recording the data read-only.

Additionally, in accordance with the above described format of the data in the buffer areas part of the clock data is written only to the locations separated from each other by a distance equal to the length of the interval m is waiting for synchronizing data in successive frames. This format is built for recording the data read-only.

Next, the pattern data for at least one part of the clock data in the buffer areas different from pattern data for synchronizing data, which are located between consecutive frames.

Moreover, in the media, read-only and proposed in the present invention, the pattern data of the second inverse interval is used as the synchronization data, recorded between successive frames in the buffer areas, in contrast to the pattern data of the first inverse interval, is used as the synchronization data that is written to the writable/readable data carrier, enabling the writing of data and reading of already recorded data. Much like the media, read-only, corresponding to the present invention, as described above, in recordable/readable media, the data is written to a writable/readable media in the form of a sequence of blocks, each of which is used as a unit of recordable/readable information; each of these blocks is presented in a format that includes opening the data area, serving the th as the initial buffer region, the cluster containing several consecutive frames, each of which, in addition to the basic data is synchronizing data, and closing the data area that serves as the destination buffer area.

A reader suggested in this invention is a device for reading data from a writable/readable media using the pattern data of the first inverse interval, which is used as a synchronization of data and media, read-only data, and the data pattern of the second inverse interval is used as the synchronization data.

The reader includes a reader for reading information from storage media installed in the device, the means for decrypting data intended for the synchronization frame and the decoding process of the data performed on the basis of clock data identified from the information read means for reading from storage media installed in the device, means for decoding addresses designed to perform the process of determining the address of the frame-based synchronization data identified from the information read means for reading from media info is rmacie, installed in the device, and controls designed to control the execution of the process of identifying the synchronization data by identifying data pattern of the second inverse interval in the case of media, read-only, set in the reading device, or control the execution of the process of identifying the synchronization data by identifying data pattern of the first inverse interval in the case of a writable/readable storage media installed in the reader.

The method of reading proposed in the present invention is the reading used in the reader, and intended for reading data writable/readable media using the pattern data of the first inverse interval, which is used as a synchronization of data and media, read-only data, and the data pattern of the second inverse interval is used as the synchronization data. The method of reading includes the following steps: determining whether the media installed in the reader, a writable/readable media or storage media, read-only, the process of identifying sinhroneziruyu data using template definition data of the second inverse interval in case if the reader is installed media, read-only, or the process of detecting the synchronizing data using template definition data of the first inverse interval if the reader has a writable/readable storage medium, and executing the synchronization frame, the decoding process data and the process of determining the address of the frame based on the detected synchronization data.

The format of the data (or a way of organizing data)used in the media, read-only and appropriate for the invention, as described above, includes a buffer area that are designed to maintain compatibility with recordable/readable media and which are the start and end parts of each of the blocks is used as a unit of data recording and reading unit information from the media. Buffer area preceding block which serves as an opening region data, and the buffer area, the following block, which serves as the closing of the field data.

Additionally, part of the synchronization data are recorded in places distant from each other in the buffer areas and serve as the opening and closing of areas, the eat synchronizing data separated by a distance, equal in length to the interval between synchronizing data in successive frames. Thus, in the read signal clock data always appear at regular intervals.

Moreover, the device and method of reading corresponding to the present invention, capable of performing up when there are differences between the inverting between the synchronization pattern data for the media, read-only, and the synchronization pattern data for writing in/reading media.

List of drawings

Figure 1 depicts an explanatory diagram showing the structure of the USD used to RAM disk and ROM disk, the appropriate implementation of the present invention.

2 is an explanatory diagram showing the format of data on the RAM disk.

Figure 3 contains an explanatory diagram showing a typical format of the first representation of the data on the ROM disk, the corresponding realization of the invention.

Figure 4 depicts an explanatory diagram showing a typical format II represent the data in the ROM disk, the corresponding realization of the invention.

Figa is an explanatory table showing the templates for synchronizing data frames RAM disk, and figb contains an explanatory table showing the order in which organized guide is by synchronizing data frames RAM disk.

Figa is an explanatory table showing [Example 1] templates for synchronizing data frames ROM drive, and figb contains an explanatory table [Example 1], showing the order in which organized templates synchronizing data for ROM disk.

Figa is an explanatory table showing [Example 2] templates for synchronizing data frames ROM drive, and figb contains an explanatory table [Example 2], showing the order in which organized templates synchronizing data for ROM disk.

Figa is an explanatory table showing [Example 3] templates for synchronizing data frames ROM drive, and figb contains an explanatory table [Example 3], showing the order in which organized templates synchronizing data for ROM disk.

Figa is an explanatory table showing [Example 4] templates for synchronizing data frames ROM drive, and figb contains an explanatory table [Example 4], showing the order in which organized templates synchronizing data for ROM disk.

Figa is an explanatory table showing [Example 5] templates for synchronizing data frames ROM drive, and figb contains an explanatory table [Example 5], showing the order in which organized sablo the s clock data for ROM disk.

Figa is an explanatory table showing [Example 6] templates for synchronizing data frames ROM drive, and figb contains an explanatory table [Example 6], showing the order in which organized templates synchronizing data for ROM disk.

Fig depicts an explanatory diagram showing a typical format III represent the data in the ROM disk, the corresponding realization of the invention.

Fig contains a block diagram showing a device for reading, appropriate implementation variant of the present invention.

Fig contains a flowchart that represents the process that performs the scanning unit, when the drive is installed in the specified device.

The best way of carrying out the invention

In the following description may be considered an optical disk, read-only, which is a variant of the implementation of the media, read-only and the corresponding present invention. Additionally, in the subsequent description will be reviewed reader capable of reading data from the optical disk, read-only, and write/read the disk on which you can also record information.

It should be noted that the optical disk is read-only and the corresponding R is the implementation of the present invention, below is called ROM drive, and a writable/readable optical disc below is called a RAM disk. The description is divided into the following sections:

1. Format RAM disk.

2. The typical format of the first representation of the data ROM drives.

3. A typical format II data representation ROM drives.

4. Templates synchronizing data and their order.

5. A typical format III data presentation ROM drives.

6. The device for reading.

1. Format RAM disk.

ROM corresponding to the invention must meet one requirement: the data format for ROM drive must be highly compatible with the data format for the RAM disk. Therefore, before explaining the data format for ROM drive, the appropriate implementation of the present invention, we describe the data format for the RAM disk.

A RAM disk, mentioned above, is considered to be disk related to the category of disks with high density, as mentioned above DVR drives.

That is, a RAM disk is an optical disk having a diameter of 12 cm and having a protective layer thickness of approximately 0.1 mm, and the thickness is part of the overall thickness of the disk. In this structure, written and read mark with phase change, while the read and write by applying a combination of laser with a wavelength of 405 nm and the object is and numerical aperture, equal to 0.85. Laser with a wavelength of 405 nm is the so-called blue laser. In this structure, the interval between tracks is equal to 0.32 microns and the linear density is 0.12 microns per bit. With this structure, the block size of 64 KB (kilobytes) is a unit of read/write.

Unit read/write to the RAM disk used as a DVR disk consists of 498 frames. 156 characters × 496 frames are the block (cluster) code with error correction, and the remaining 2 frames are added before and after the block of code with error correction and serve as the field mates, intended, inter alia, for PLL synchronization. This unit read/write is called RUB (recording unit).

It should be noted that if the RAM disk is created on the disk, the groove having a winding wall. This groove with sinuous walls is used as a track for recording. The meandering shape of the walls of the grooves contains the so-called ADIP data. It is highlighting the information about the twists inherent in the walls of the grooves, the result is the address of the disk.

On a winding groove created as the recorded tracks, recorded mark, which marks with phase changes. Mark with phase change is recorded with a linear density of 0.12 μm/bit and 0.08 microns/channel bits using the method RLL (1, 7) PP mo is ulali, where RLL is the abbreviation for limited duration pulse and PP is an abbreviation for Parity preserve/Prohibit PDIP (repeated minimum duration pulse during transmission).

If you take channel 1 bit by 1 T, the length of the mark is in the range from 2 T to 8 T, the minimum length of the mark is 2 So

The structure of the USD used as a unit (unit for read/write) read channel data shown in figure 1.

USD is recorded on a predetermined location defined by the address of the location on the disk, and arranged so as to constitute a continuous sequence, beginning with the starting position for recording data. Figure 1 shows the case in which USD is written as a sequence of M blocks, starting from USD with the address A1.

Configuration USD begins with an opening region data, which includes 2760 channel bits. This opens the data area is also below will be referred to simply as the opening area. The opening region data should cluster that represents a set of modulated user data and synchronization patterns. Configuration USD ends with a closing area of data, consisting of channel 1104 bits. This covers the area Yes the data also below will be referred to simply as the closing region.

The opening and closing of the area occupied area, which is called the mate.

As shown in figure 1, the cluster consists of 496 frames, i.e. frames from 0 to 495. At the beginning of each frame is the frame synchronization signal FS. For clock FS frame should the frame data FD. Synchronizing the data frame FS contain 30 channel bits. The frame data FD are the data recorded by the user.

Figure 2 is a diagram showing the details pane pair provided at the boundary between two consecutive USD and which is the place involved the opening and closing areas.

As shown in figure 2(a), the part covering the field of the last frame (frame 495) any specific USD overlaps part of the opening region of the first frame (frame 0) of the USD, which follows the aforementioned USD. Opening and closing the area occupied by the region of the coupling, which is the interval whose length is equal to the total length of the two frames. In other words, when a specific USD is written to the location immediately following the previous USD, the recording begins with NSP (nominal starting point)inside the closing area of the previous USD, thus, the opening area of a specific USD overlaps the end portion of the closing area of the previous USD.

These top the ending part of the leave no gap between the previous USD and recorded USD.

Specified dvuhmetrovy interval that serves as the area mates and occupied by the opening and closing areas, can perform various functions buffer for USD.

For example, the opening area is used as an area for "pulling out" of the synchronization signal PLL at the time of the read/write data. Additionally, the opening area can be used for APC (automatic power control) power of the laser during the recording of data. For example, if the opening area provided by the protected area to overlap during recording, the specified area may be used for recording pattern signal for automatic power control of the light source.

Closing the area can also be used for several purposes. Like in the opening region covers the area serves as a buffer region for copying with changes in the position of the record that caused the SPS and the precision of the position to start recording. It should be noted that the SPS position for standard shift position indicates the shift position, which occurs when the initial position of each recording unit is shifted from the nominal starting point (NSP) by a distance corresponding to a random number of channel bits, which is done in order to protect the drive from excessive wear resulting from thamnochortus perform write operations.

Closing the area can also be used as a buffer area provided in some periods of time, as a buffer for a process that takes considerable time, such as the process of decoding by Viterbi and stabilization waveform at the time of reading. If the closing area there is some finite field to control the signal processing in time, this finite field can be used to write a template signal to clock the read PLL. As for this pattern, it is desirable to use a repeatable pattern that is optimal for PLL-clock reading used to process that takes considerable time, such as the process of decoding by Viterbi and stabilization waveform during reading.

Additionally, at the end of the recording process unit covers the area can be used for ARS-power laser.

Figure 2(b) shows the diagram shows the area of DRO for data located in the closing region, and the region DRI for data located in the opening region. Usually the area occupied by areas DRO and DRI for data that can be used for data and templates provided for the purposes described above.

As shown in figure 2(a) and 2(b), the region of the coupling, including the opening and closing is blasti, used to write plots sync data S1, S2 and S3, as well as template 6-repeated-9T (pattern 9T × 6).

The frame synchronization signal FS, which will be further described in detail and which is included in each frame, described above, contains the pattern synchronizing data 2-subsequent-9T. Lots synchronization data S1, S2 and S3 each also includes a synchronization pattern data 2-subsequent-9T.

Sites comprising three pattern pieces sync data S1 and S2, and the frame sync FS, located at the beginning of the first frame (frame 0), allow a high degree of reliability of the sync frames. That is, when reading the opening part of the first one is used for "pulling out" PLL-sync signal. Further areas, including part of the sync data S1 and S2, and FS, are used to synchronize the frame.

Advanced template 6-repeated-9T contained in the closing region, is intended to define the end of a read operation of the data block. That is, the reader is able to determine the end of the data block detecting a unique pattern 6-repeated-9T in USD.

For the presentation of data in this RAM disk has the following properties:

- Data is written to a RAM disk units, which is the USD. When performing processes of recording and sitiveni is USD region pair acts as a buffer region, designed to maintain the possibility of random access.

Using SPS, obtained as a result of shifting the starting position described above, the disk is protected from excessive wear, it is possible for a multiple write operation, the same data on the disk. This SPS operation can be performed due to the fact that the area of the pair serves as a buffer.

- When reading the dot clock PLL is formed using the opening region and the frame, and the frame is read using parts sync data S1 and S2, and FS, all of this occurs with a high degree of reliability.

- Interframe gap in the clock data area mates are not the same as constant between frames, i.e. frames from 0 to 495. That is, in the position corresponding to the beginning of the second frame region mates, having a length equal to two frames not included no clock data. This is because in RAM disk recordable unit is fully formed as USD-unit, and thus there is no need to include pairing the same interframe gap, as the synchronization data frame, serving as a constant between frames. It is also due to the fact that the opening and closing of field lane is opening each other, and the operation is performed in the SPS. Other reasons include the fact that it is desirable to provide a data pattern having the form of a short inverted period, for the purpose of pulling the trigger in a position approximately corresponding to the beginning of the second frame, and even take into account the fact that not correct it would be to have the clock data representing long inverted interval size 9T in this place. In figure 2 the position corresponding to the beginning of the second frame represents the position contained in the DRI opening area.

It should be noted that in RAM disk address can be obtained from the grooves with sinuous walls. Thus, the importance recorded in the frame address is relatively small, compared with the same address for ROM disk.

In addition, the rotation speed of the disk can be read from the information conveyed in the winding groove. This means that there is no need for the array data regularly to insert synchronization data. That is not necessarily to determine the speed in intervals between occurrences of the synchronization data. For this reason, there is no problem due to the irregular occurrence of synchronizing data in the field mates.

2. The typical format of the first data representation ROMs

In the following description discusses a typical first four is at the first representation of the data in the ROM drive, appropriate implementation variant of the invention, in which a format compatible with the format RAM disk described above.

When taking into account compatibility with RAM disk, first, it is possible to think of the ROM disk, the format of which coincides with the presentation of the data on the RAM disk, shown in figure 2. That is the format the RAM disk has an area mates containing the opening and closing of the area, and region pair has sections S1, S2 and S3 sync data, and a template 6-repeated-9T (pattern 9T × 6)shown in figure 2.

By following this format, however, gaps appear in the clock data area mates becomes irregular, resulting in the following problems.

In the case of a ROM disc on its surface is not formed grooves with sinuous walls. Instead, on the surface ROM drive track is formed as an array of recesses. Thus, from such winding grooves is impossible to determine either the address or the rotation speed of the ROM disk. Therefore, in the case of a ROM disk synchronization data is used to generate the clock signal intended for PLL spindle. This is because synchronization data appear in a continuous stream of frames cher is C equal intervals, and thus, even in the asynchronous state, the period of the emergence of synchronization data may be used as information indicating the speed of rotation. Thus, based on the detection of the synchronizing data you can control the speed of rotation of the spindle.

In such case, the fact that the gap in the appearance of the clock data in the opening and closing areas is not permanent, make it impossible to correctly receive the clock signal in mate. Thus, the clock signal received in the field mates, is incorrect or inaccurate. Incorrect or inaccurate clock signal causes the problems of improper generate a signal phase error in the PLL spindle using the synchronization pattern data.

Additionally, for proper handling of synchronizing data appearing in the field mates through different periods, it is necessary to teach the path synchronization understand the variables parcels irregular synchronisation data synchronisation data, thus, inevitably, the synchronization circuit will get tougher and larger. Therefore, from the point of view of synchronization, there is a problem.

On this basis, in the implementation of the present invention forms the t representation of the data in the ROM drive is set as follows.

First, the structure of the USD for ROM drive used in the implementation of the invention, is set the same as the structure shown in figure 1. That is, USD includes an opening region that serves as a buffer, a cluster consisting of 496 frames, i.e. frames with numbers from 0 to 495, and closing the area, also serving as a buffer.

Figure 3 shows a schematic detail showing details of the area mates ROM disk, the corresponding realization of the invention.

As shown in figure 3(a) region mates with the size equal to the size of the two frames, and consists of the opening and closing of areas, represents the interval between the last frame (frame 495), before reaching the region of the coupling, and the first frame (frame 0) of the next USD, which is located outside the area of the pair.

The final part of the USD is terminal region containing 1104 channel bits, as shown in Fig 3(b). This end region is covering the area.

On the other hand, the initial part of the USD is the buffer area, including 828 channel bits and precat containing 1932 channel bits. This initial part is the opening region.

Region pair (or buffer area), including the opening and closing of areas, as described above, coincides with the same area of the RAM disk, and, therefore, improves compatibility ROM RAM disk.

As shown in figure 3(a) and 3(b), the region of the coupling, including the opening and closing of the area is used for burned plots S1, S2 and S3 sync data and template 6-repeated-9T (pattern 9T × 6) similar to format the RAM disk shown in figure 2.

However, if the data representation format ROM drive area mates also provides synchronization data SA, as shown in figure 3.

As is clear from figure 3(b)specified sync data SA are located in the initial part of the segment occupied by the second frame region pair, which has a size of two frames.

On the other hand, sync data S3 are placed in the initial part of the segment occupied by the first frame region pair, which has a size of two frames, as described above. Thus, sync data S3 and SA, located in the region of pairing and synchronization data frame FS located in the initial part of each frame (frames 0 to 495), are at the same distances and are templates synchronizing data. The data are the same distance have the same size as one frame.

It should be noted that each shaded region in figure 3(b) may contain any recorded data or template. If the shaded area is used to record and template to extract a clock signal reading it is clear that, for example, the pattern with relatively small inverted interval can be written to this location.

Additionally, the seat can also be written to predetermined control data and/or predetermined dummy data.

Taking the format of the data ROM of the ROM in accordance with the implementation of the invention as described above can achieve the following results.

- Providing region pair, it is possible to carry out the process of decoding frames equivalent of this process for the RAM disk, so compatibility is achieved with a RAM disk. Additionally, the region pairing also allows random access. That is, you can just design the reader as RAM and ROM, and the device will be easier and its price will decrease.

- Sync data SA are recorded at the place for which there is no data, in particular, since the RAM disk. Thus, sync data SA almost no effect on the format the RAM disk.

Because the synchronization pattern data is generated regularly for each frame, including the first frame in the region of the coupling, which begins with a sync data S3, and the second frame region pair, which starts the I sync data SA, the format has advantages in ensuring framing and synchronization frames.

- As ROM does not contain grooves with sinuous walls, information about the rotation speed of the spindle can be obtained based on the definition clock data, which can be done based on the fact that the synchronization pattern data is produced by the same intervals for each frame. That is, the data format includes the development of the phase error signal for PLL spindle using templates synchronizing data. In particular, information about the rotation speed of the spindle can be obtained from the intervals formed between templates synchronizing data, even in case of asynchronous state of the PLL.

3. A typical format II data representation ROMs

The following description explains a few of the best typical format II presentation of data in the ROM disk, the corresponding implementation variant of the invention.

In this case, the structure is USD ROM drive used in the implementation of the invention, also coincides with the structure of a RAM disk, shown in figure 1. That is, USD includes an opening region that serves as a buffer, a cluster consisting of 496 frames, i.e. frames with numbers from 0 to 495, and closing the area also serves as a buffer

Figure 4 shows a schematic, detail depicting details of the area mates ROM disk, the corresponding realization of the invention.

As shown in figure 4(a), area pair having a size equal to the size of the two frames, and consists of the opening and closing of areas, represents the interval between the last frame (frame 495), the previous field pair, and the first frame (frame 0) of the next USD, which is located outside the area of the pair.

The final part of the USD is terminal region containing 1104 channel bits, as shown in figure 4(b). This end region is covering the area.

On the other hand, the initial part of the USD is the buffer area, including 828 channel bits, and precat containing 1932 channel bits. This initial part is the opening region.

Region pair (or buffer area), including the opening and closing of areas, as described above, coincides with the same area of the RAM disk, and, therefore, improves the compatibility of ROM and RAM disk.

As shown in figure 4(a) and 4(b), the region of the coupling, including the opening and closing of areas not used for recording sites S1 and S2 sync data and template 6-repeated-9T (pattern 9T × 6), as was done in the format RAM disk shown in figure 2.

The region is te mate also contains

areas SA and S3 sync data, as shown in figure 4(a).

As is clear from figure 4(b), the specified sync data SA are located in the initial part of the segment occupied by the second frame region pair, which has a size of two frames.

On the other hand, sync data S3 are placed in the initial part of the segment involved Pervin frame region pair, which has a size of two frames, as described above. Thus, sync data S3 and SA, located in the region of pairing and synchronization data frame FS located in the initial part of each frame (frames 0 to 495), are at the same distances and are templates synchronizing data. The data are the same distance have the same size as one frame.

Thus, the plots sync data S1 and S2, as well as the template 6-repeated-9T (pattern 9T × 6), which are found in the typical format of the first representation of the data ROM of the ROM, are excluded from the typical format II data representation.

It should be noted that each shaded region in figure 4(b) may contain any recorded data or template. If the shaded area is used for recording template to extract a clock signal reading, it is clear that, for example, the pattern with relatively small invertirovat the principal amount can be written to this location. Additionally, the seat can also be written to predetermined control data and/or predetermined dummy data.

Taking the format of the data ROM of the ROM in accordance with the implementation of the invention as described above can achieve the following results.

- Providing region pair, it is possible to carry out the process of decoding frames equivalent of this process for the RAM disk, thus achieving compatibility with a RAM disk. In addition, the region pairing also allows random access. That is, you can just design the reader as RAM and ROM, and the device will be easier and its price will decrease.

- Sync data SA are recorded at the place for which there is no data, in particular since the beginning of the RAM disk. Thus, sync data SA almost no effect on the format the RAM disk.

Because the synchronization pattern data is generated regularly for each frame, including the first frame in the region of the coupling, which begins with a sync data S3, and the second frame region pair, which begins with a sync data SA, the presentation format has the advantage of ensuring synchronization of frames and when the sync process is organization personnel.

- As ROM does not contain grooves with sinuous walls, information about the rotation speed of the spindle can be obtained based on the definition clock data, which can be done based on the fact that the synchronization pattern data is produced by the same intervals for each frame. That is, the data format includes the development of the phase error signal for PLL spindle using templates synchronizing data. In particular, information about the rotation speed of the spindle can be obtained from the intervals formed between templates synchronizing data, even in case of asynchronous state of the PLL.

In a typical format of the first data representation described above, in addition to the areas SA and S3 available in the intervals between frames, the area of the mate also contains sections S1 and S2 synchronization data, and a template 6-repeated-9T (pattern 9T × 6), each of which is a template synchronizing data. However, as templates sites S1 and S2 synchronization data, and a template 6-repeated-9T appear irregularly and, therefore, are an obstacle when generating a phase error signal for PLL spindle. In some cases, the areas S1 and S2 synchronization data, and a template 6-repeated-9T cause incorrect recognition of patterns of sin is toniziruushii data appearing at regular intervals, and, consequently, an incorrect determination information on the rotation speed. Thus, the relinquishment S1 and S2 synchronization data, as well as from template 6-repeated-9T second common data representation format is a great advantage when generating a phase error signal for PLL spindle. It should be noted that, as explained in the description of the data format the RAM disk, the areas S1 and S2 synchronizing data designed to improve occurrences in synchronism frames. However, if ROM drive for continuous recording user data, the implementation of occurrences in synchronism frames for each USD is not so important. Therefore, the plots sync data S1 and S2 is not important. Definition of end USD using template 6-repeated-9T also not very important for ROM drive. For these reasons, the relinquishment S1 and S2 sync data and template 6-repeated-9T does not give rise to any problems.

4. Templates synchronizing data and an order

In a typical format II data representation ROM drive, as well as in the typical format I data, for example, as templates synchronization data is provided for synchronizing data frames FS, which are available in each frame (frames 0 to 495). Also provided for synchronizing data A and S3, which are located in the area of mates. All of these synchronizing data occur at equal intervals, equal to the frame length.

If the RAM disk, the frame number assigned to each frame can be identified by synchronizing the data frame FS, which are available for each frame.

For the internal addressing of the data frames that comprise the USD, divided into 16 address units, which represent the physical sector. As USD contains 496 frames, each of the 16 physical sectors that make up USD, contains 31 of the frame.

Each physical sector, consisting of a frame 31 USD has recorded in USD address of the physical sector. Usually the address of the physical sector recorded in predetermined locations in the three initial USD frames, i.e. frames 0, 1 and 2.

Further, determining the synchronization pattern data frame FS, you can get the numbers from 0 up to 30 frames assigned frame 31, the components of the physical sector, thus you can find the address of each frame. So it is possible to receive the internal address of the frame as a combination of numbers assigned to the frame, and the number of a sector assigned to the physical sector USD, which contains the given frame.

<Synchronizing data frames RAM disk>

Before to describe the synchronizing data frames ROM drive first, we describe the synchronization data frame RAM dis is A.

Synchronizing the data frame FS with 30 channel bits are at the beginning of each frame included in the USD, i.e. frames from 0 to 495.

As shown in figa synchronizing the data frame FS represent one of the 7 specific templates synchronizing data from FSO to FS6.

Each of the templates synchronizing data from FS0 to FS6 has a body consisting of 24 bits, and the ID, whose length is 6 bits. Body clock data is 24-bit pattern that does not contradict the rule RLL (1, 7) PP modulation. On the other hand, the identifier (ID) is a sign that serves to identify it.

The synchronization pattern data is modulated bits. ′1′ in the example of the bit shown in figa indicates an inverted signal. Before writing such a code synchronization of the data on the drive, this code synchronization data is converted into a stream of channel bits NRZI (record no return to zero inversion). That is, the body clock data ′0101000000000100000000010′ becomes a pattern of two consecutive 9T, inverted V ′1′as shown in figa.

Templates synchronizing data from FS0 to FS6 have the same body and differ from one another by their IDs.

As described above, USD, consisting of 496 frames, under the 16 physical sectors, each of which contains a frame 31. 31 frame can be identified using the clock data frame FS, added to frames.

However, seven types of FS is not enough to identify the frame 31. Thus, the 7 types of synchronizing data frames FS, i.e. patterns FS0 to FS6, organized according to a predetermined order among 31 of the frame and the frame is identified by a combination of the previous/subsequent synchronization pattern data.

As shown in figb, pattern synchronization data frame FS0 assigned to the first frame of each physical sector, i.e. to the frame with frame number 0. Other templates from FS1 to FS6 attributed to other frames, numbered from 1 to 30, as shown in figb.

As shown in figb, templates synchronization data frame from FS0 to FS6 for the clock data frame FS attributed to thirty-one frame in a specific order so that any given frame can be identified by the combination, including the type of FS (clock of the data frame), attributed this particular frame, and the type of FS (clock of the data frame), attributed to the previous frame. More specifically, the number n of the frame can be determined from the combination of the synchronization pattern data, attributed this particular frame, and the synchronization pattern data, ascribed to I.P. Argunov the frame preceding the frame, the number of which is equal to (n-1), (n-2), (n-3) or (n-4).

For example, suppose the frame number assigned to a given frame is equal to 5, i.e. let this frame will be the fifth. In this case, even if FS (synchronizes data frame) types assigned to the previous first, second, and third frames are lost, even if the templates are synchronizing data FS1, FS2 and FS3 are lost, then the number for the current frame, i.e., the number 5 of the frame assigned to the fifth frame, can be determined from the combination of type FS (synchronizes data frame)attached to the previous frame, and the type of FS (synchronizes data frame)attached to this frame, i.e. from the combination of template FS3, assigned to the fourth frame, and template FS1 assigned for the fifth frame. This happens because the template FS3 should the template FS1 only in one place on figb, that is in place when the frame number 4 is followed by a frame number 5.

It should be noted that, as an exception, the pattern synchronizing data FS0 is used to sync data S3 at the beginning of each field pair RAM disk. However, the pattern synchronizing data FS0 is used to sync data S3 at the beginning of each region pair, which is not shown in the figures.

<a Typical synchronization data frame ROMs [Example 1]>

The following description will explain a lot sync is desiroush data frame, used in typical formats I and II represent the data taken for ROMs, depicted respectively in figure 3 and 4.

Typical synchronization data frame [Example 1] is shown in figa and 6B.

As shown in figa, typical synchronization data frame [Example 1] are 7 specific templates synchronizing data from FS0 to FS6, as in the case of synchronizing data RAM disk.

As shown in figb, patterns FS0 to FS6 for synchronizing data FS frame ascribed thirty-one frame at a time in some order, we need to identify any frame. That is, patterns FS0 to FS6 associated with numbers assigned personnel for the same purpose of identifying frames.

The synchronization pattern data FSO is used as a sync data S3 region pair, as shown in figure 3 and 4.

As for sync data SA, and they use any of the templates from FS1 to FS6. Or it is also possible to use a template that contains two successive pattern 9T, as the body of synchronizing data that is not followed by an identifier.

Using such a typical synchronizing data frames [Example I], it is possible to perform common with RAM disk synchronization frames. Thus, a typical synchronization data frame [Example 1] help with the compatibility.

<a Typical synchronization data frame ROMs [Example 2]>

Typical synchronization data frame [Example 2] shown in figa and 7B. As shown in figa, the second typical synchronization data frame FS have the body ′010100000000001000000000010′. That is, the template is used 10T.

Except template 10T as the body of synchronizing data, typical synchronization data frame [Example 2] coincide with the typical synchronization data frame [Example 1]. More specifically, patterns FS0 to FS6 used much like a typical synchronization data frame [Example 1] as types of FS (synchronizes data frame and associated with the frame numbers from 0 to 30, as well as sync data S3 and SA.

As described above, in the case of ROM information of the rotation speed of the spindle can be obtained on the basis of intervals between synchronizing data and the inverted interval for the data is from 2T to 8T.

The use of the pattern 9T as a template synchronizing data facilitates the work of the PLL for the read out signal. If the phase error signal for PLL spindle is obtained based on the definition clock data (even in the case of asynchronous state), then the use of the data, the maximum length of which is from 8T to 9T, as a template Shin is toniziruushii data most likely will result in incorrect determination of the synchronization data. That is, in a state in which the PLL spindle is not locked, the gap defined between the synchronization data is changed in accordance with the rotational speed. However, in this case, it is likely that the area data length 8T may be incorrectly identified as the synchronization pattern data. An example of a state in which the PLL spindle is not locked, is the state in which the rotation speed of the spindle is not fixed equal to a predetermined value.

Considering the fact above, it is desirable to use a template 10T as templates synchronizing data from FS0 to FS6 for ROM drive. So it is possible to reduce the probability of an incorrect identification of the site data 8T, and the template 10D has the advantage to determine the clock for PLL spindle.

<a Typical synchronization data frame ROMs [Example 3]>

Typical synchronization data frame [Example 3] shown in figa and 8B. Typical synchronization data frame [Example 3] include template FS7 used as a template for the clock data frame FS. This template FS7 is used in addition to the templates from FS0 to FS6 used for the RAM disk.

More specifically, the template FS7 is provided in addition to the templates is t FS0 to FS6 for the clock data frame FS, as shown in figa, and is a pattern that differs from the others only by ID.

It should be noted that the body clock data is a pattern 9T.

As shown in figb, patterns FS0 to FS6 ascribed to the frame numbers from 0 to 30 in the same way as is done for the RAM disk.

The synchronization pattern data FS0 is used as a sync data S3 region pair. However, in the case of a typical synchronization data frame [Example 3], template FS7 is used as a sync data SA for the mate.

In the case of a typical synchronization data frame [Example 1]described above, patterns FS0 to FS6 used for receiving a clock data in essentially the same data to the RAM disk.

If the RAM disk, use the clock data frame FS is sufficient for frame identification in the physical sector. Not necessary to consider the scope of the mates in the identification frame. In addition, to get the correct address from the ADIP addresses enclosed in a winding groove, if the frame number has not been correctly defined.

Based on this concept templates synchronizing data from FS0 to FS6 be installed so that it is possible to identify the frame 31.

Also in the case of ROM, if you accept the concept that chelation is correctly to be able to identify 31 frame, which constitute the physical sector USD, typical synchronizing data frames [Example 1] or [Example 2] can be considered as an appropriate synchronization data frame.

If the use of the identified templates synchronization data is reviewed to identify areas SA and S3 sync data in the field mates, adapting only the typical synchronization data frame [Example 1] or [Example 2], there are relatively many cases where plots sync data SA and S3 will not be defined.

That is, patterns FS0 to FS6 synchronization data frame fixed frame 31 in a certain order, so that any given frame can be identified using a combination of template assigned to that specific frame and any of the 4 frames preceding the frame. In other words, patterns FS0 to FS6 synchronization data frame assigned numbers from 0 to 30 in such manner that any combination of templates synchronizing data attached to the frames, never appears for other numbers of frames.

If the above rule applies when using any template (including parts of SA and S3 sync data), the combination of templates synchronizing data can be repeated, and in some cases, identification of the e can be produced.

To solve this problem, in the case of sections SA and S3 sync data as templates to identify a frame that uses the new template FS7 to sync data SA, which is a typical case of synchronizing data frame [Example 3].

<a Typical synchronization data frame ROMs [Example 4]>

Typical synchronization data frame [Example 4] shown in figa and 9B. As shown in figa, in a typical synchronization data frame [Example 4] as the body clock FS data template is used 10T.

Except template 10T as the body of synchronizing data, typical synchronization data frame [Example 4] is similar to a typical synchronization data frame [Example 3]. More specifically, the templates from FS0 to FS7 are used as types of FS (clock of the data frame) and are fixed to the frame numbers from 0 to 30, with patterns FS0 and FS7 used as respectively sync data SA and S3 much like a typical synchronization data frame [Example 3].

Use template 10T contributes to the determination of clock for PLL spindle, as explained above, when describing a typical synchronizing data [Example 2].

<a Typical synchronization data frame ROMs [Example 5]>

Typical of synchronization is yousie data frame [Example 5] shown in figa and 10B. Typical synchronization data frame [Example 5] include templates FS7 and FS8 used as templates for the clock data frame FS. These templates FS7 and FS8 is used in addition to the templates from FS0 to FS6 used for the RAM disk.

More specifically templates FS7 and FS8 provided in addition to the templates from FS0 to FS6 for the clock data frame FS, as shown in figa, and templates are different from other identifiers. It should be noted that the body clock data is a pattern 9T.

As shown in figb, patterns FS0 to FS6 ascribed to the frame numbers from 0 to 30 in the same way as is done for the RAM disk.

However, the frame number 30 in each physical sector is combined with the template synchronizing data FS2, except for the last frame number 30 in the sixteenth physical sector USD. To only have to frame 495 template FS7 fixed for the last frame (frame 495) USD and replaces the template FS2.

In addition, templates synchronizing data FS8 and FS7 used respectively as sync data S3 and SA, which are located in the area of mates.

As a new template FS7 is used as a sync data SA, as in the case of a typical synchronization data frame [Example 3] and [4], the combination of templates clock d is the R is never repeated, even if you take into account lots sync data S3 and SA, thus, it is possible to identify each frame USD, including those located in the field of pair.

If we consider the combination of the patterns described above, and templates synchronizing data assigned to the consecutive frames of the USD and which capture area mate, any specified combination can be repeated, and thus it is impossible to identify the frame.

For example, consider a typical synchronizing data frames [Example 3], shown in figa and 8B, and a typical synchronizing data frames [Example 4], shown in figa and 9B. In this case, synchronizing the data frame is assigned to the second frame (frame 1) any specific USD is a template FS1 and synchronize the data frame that is attached to the frame preceding the second frame 4 frame is a template FS2. This is due to the fact that the preceding frame is the last frame (frame 495, with the number 30) USD immediately preceding the particular USD.

However, the combination of template FS1 and pattern sync data FS2 preceding the template FS1 4 frame, also appears for the frame number 23. This is due to the fact that synchronization data frame is assigned to a frame number 23, is a template FS1, and synchronize the respective data frame, assigned to the frame number 19 (this frame appears before the frame number 23 on 4 frames) are template FS2.

In order to prevent the recurrence of such combinations of templates synchronizing data, you must assign the new template FS7 only the last frame (frame 495) USD each.

That's why only for frame 495 template synchronizing data FS7 is assigned to the last frame (frame 495) USD each and replaces the template synchronization data frame FS2 in the fifth typical synchronization data frame, as described above.

If the template FS7 is attributed to the last frame (frame 495), whereas templates synchronizing data FS0 and FS7 used as plots sync data S3 and SA, respectively, however, the combination of patterns will be repeated.

More specifically, the combination of the synchronization pattern data FSO assigned to a certain frame and template FS7 assigned to the immediately preceding frame is a combination of the patterns assigned to the first frame region pair and frame 495, as well as equal combination of templates synchronizing data assigned to the first frame (frame 0) of the USD and the second frame region pair.

In order to avoid repetitions of similar combinations of templates synchronizing data in a typical clock given to the s frame [Example 5] use the new templates FS8 and FS7, serve as sites sync data S3 and SA, respectively. These sites are located in the area of mates. This situation is shown in figa and 10B.

Using the above typical synchronization data frame [Example 5], it is possible to reliably determine the frame number for each frame, including those located in the field mates.

In the case of a ROM disc, you cannot determine the address of the information contained in the groove with sinuous walls. Therefore, it is desirable to have the capability of determining the frame number for each frame, even when the frames extend beyond one USD, and it is desirable to determine the address with a high degree of reliability.

It should be noted that the templates synchronizing data FS7 and FS8 can also be attributed in reverse order. That is, the template FS8 is assigned to the last frame (frame 495), and is also used to sync data SA, whereas the template FS7 is used to sync data S3.

<a Typical synchronization data frame ROMs [Example 6]>

Typical synchronization data frame [Example 6] shown in figa and 11B. As shown in figa, in a typical synchronization data frame [Example 6] as the body clock FS data template is used 10T.

Except template 10T as teleingreso data sixth typical synchronization data frame is similar to a typical synchronization data frame [Example 5]. More specifically, the templates from FS0 to FS8 are used as types of FS (clock of the data frame), the template FS7 is attributed only to the last frame (frame 495), while synchronizing data frames FS7 and FS8 used as respectively sync data SA and S3 much like a typical synchronization data frame [Example 5]. It is also worth noting that in the case of a typical synchronization data frame [Example 6] templates synchronizing data FS7 and FS8 can also be attributed in reverse order.

Use template 10T contributes to the determination of clock for PLL spindle, as explained above in the description of a typical clock data [Example 2].

5. A typical format ROMs III

As the implementation of the present invention a typical data formats ROM drive shown in figure 3 and 4. It is also possible to perceive the typical presentation format adopted in the ROM drive, as the data representation format without region pair. A typical format without region pair is shown in Fig.

That is, USD has a configuration consisting of 496 frames, i.e. frames from 0 to 495, or USD has a continuous format, not the content the speaker buffers.

In the case of the adoption of this typical format III data representing the amount of recorded data is increased by an amount equal to the excluded volume of buffer areas.

Additionally, since the synchronizing data frames FS always appear at regular intervals, then the specified data format has the advantage of ensuring synchronization of frames and the process of entering into synchronism for the frames. In addition, the data format also facilitates the generation of the phase error signal for the PLL of the spindle.

Moreover, in the case of using templates synchronizing data to identify frames, the same template settings synchronization data, as for the RAM disk, will result in no repetitions in combinations of templates synchronizing data.

Because the size of the USD changes when moving from one RAM disk to another, the typical format III data representation has the disadvantage in terms of compatibility.

6. The reader

The following is a description reader capable of reading data from the ROM disk, the corresponding implementation of the present invention and compatible with a RAM disk.

It should be noted that the RAM disk as a template synchronizing data pattern 9T, which is shown in figa and 5B, while the ROM as a template synchro is siroua data uses a template 10T, as shown figa and 9B, and figa and 11B.

On Fig depicts a block diagram showing a device for reading.

The reader includes a block 51 removal, the motor 52 of the spindle (LH)circuit 53 servo puller, the circuit 54 of the spindle servo, the CPU 55 of the read signal, the block 56 of the generation timing of the spindle, the decoder 57 address generator 58 of the clock signals, the processor 59 of the generated data, and a controller 63. The motor spindle 52 is a component serving to rotate the storage medium. The circuit 54 of the spindle servo is a component designed to control the motor 52 of the spindle. The circuit 53 of the servo puller is a component that serves to implement the applied unit 51 removal. The block 56 of the generation timing of the spindle is a component designed to highlight the synchronization signal from the read signal and the output signal of the phase error in the PLL spindle. The decoder 57 is a component that serves to extract from the read signal information such as address, to identify the location on the disk 50. The generator 58 of the clock signals is a component for generating a clock signal of the read data by using the address retrieved by the decoder 57 address. The processor 59 chemerisov is the R data is a component, employees to perform processing, such as demodulation, synchronization-detection and decoding code with error correction. The controller 63 is a microcomputer that contains the interface for communication with external devices such as a host computer 64.

The disk 50 is a RAM or a ROM disk having the data format described earlier.

The disk 50 mounted on the rotary platform, not shown Fig. During reading, the motor 52 of the spindle causes the disk 50 into rotation at a constant linear velocity (CLV).

Block 51 pickup to read data from disk 50. If the disk 50 is a RAM disk, data is recorded on the disc 50 in the form of phase change marks are read from the disk 50. On the other hand, if the disk 50 is a ROM disc, the data recorded on the disc 50 in the form of embossed pits are read from the disk 50.

Block 51 pickup has a laser diode, a photodetector, a lens and the optical system, which is not shown in Fig. The laser diode is a source generating a laser beam. The photodetector is a component that serves to detect the laser beam reflected from the disk 50. The lens is a component through which extends a laser beam generated by the laser diode. The optical system is a component that serves to emit the laser beam Nezavisimaia the surface of the disk 50 with use of the lens and serves for guiding the reflected laser beam.

The output of the laser diode usually has a so-called blue laser having a wavelength of 405 nm. Numerical aperture characteristic of the optical system, equal to 0.85.

The lens is mounted in the block removal 51 so that it was possible to move the lens for tracking and focusing using a biaxial mechanism. Additionally, the entire unit 51 of the pickup can be moved in a radial direction relative to the disc 50 by means of the threaded mechanism.

The photodetector registers the laser beam reflected from the disk 50, by means of generating an electrical signal representing the amount of light in the laser beam. The photodetector generates an electrical signal to the processor 55 read the signal.

The CPU 55 of the read signal includes a circuit converting current into voltage and circuit amplifiers/matrix processing, performing a matrix process for generating the necessary signals. The contour of the conversion of current to voltage is a component that serves to convert the current, which is the output of many devices, light receiving and forming a photodetector, in the voltage.

The signals generated by the processor 55 of the read signal, include push-pull signal and the high frequency signal representing data read from the disk 50. The generated signals are also the gain error signal and focus error signal tracking used when serverhellodone.

Additionally, the CPU 55 reads signal performs various kinds of processing a high frequency signal representing the read data. Processing is performed to generate the read channel data. Processing includes the process of automatically receiving control (AGC), the process of AD conversion, the adjustment signal and the process of decoding by Viterbi.

The signal data read (or read channel signal), which is the output of the processor read signal 55, is supplied to the CPU 59 of the generated data, the decoder 57 address and the block 56 of the generation timing of the spindle. On the other hand, the error signal and focus error signal tracking are fed to the circuit 53 of the servo puller.

As described above, the block 56 of the generation timing of the spindle extracts a synchronization signal from a signal read out data and sends a signal phase error in the PLL spindle. The synchronization signals are areas of synchronizing data FS, SA and S3 described above.

The circuit 54 of the spindle servo signal enters the phase error obtained from block 56 of the generation timing of the spindle, the PLL spindle in order to control the motor 52 of the spindle that rotates the disk 50.

Additionally, the circuit 54 of the spindle servo generates the excitation signal spinde what I in accordance with a control signal acceleration/deceleration of a spindle which is transmitted from the controller 63, performing operations such as operation start, stop, acceleration and deceleration of the motor 52 of the spindle.

The circuit 53 of the servo puller generates a number of signals is applied, such as signals for focusing, tracking, and drive the screw mechanism. Output signals is based on signals of the focus errors and tracking received from the CPU 55 reads the signal.

More specifically, the circuit 53 of the servo puller generates a signal to the focus actuator and the drive signal based tracking error signal and focus error signal tracking, respectively. The actuator signals for focus and tracking are given correspondingly to the focusing coil and the tracking coil, which are used in the two-axis mechanism unit pickup 51. Thus, the block pickup 51, the CPU 55 of the read signal, the circuit 53 of the servo puller and a two-axis mechanism form a loop servo tracking loop servo focus.

Additionally, according to the command of the transition track received from the controller 63, the circuit 53 of the servo puller off the outline of the servo track and performs a transition track, giving the signal PE is ehoda.

Moreover, the circuit 53 of the servo puller generates the excitation signal the screw mechanism on the basis, inter alia, the error signal of the threaded mechanism, obtained as part of a low-frequency component of the error signal track and signal-based management access received from the controller 63. Based on the excitation signal is driven by a screw mechanism, not shown Fig. The screw mechanism is a mechanism containing the major axis to maintain the block pickup 51, the screw motor and gear mechanism. In accordance with the excitation signal of the threaded mechanism motor screw mechanism moves the block pickup 51 in the desired location.

The decoder 57 address selects clock signals, that is, areas synchronizing data FS, SA and S3 from the signal read out data and determines the address information from the read signal data based on the synchronization data, the decoding information about the selected address.

The generator 58 generates clock signals clock data is read by using the address information extracted by the decoder 57 addresses based on the control signal received from the controller 63, and transmits the clock signal reading processor 59 of the generated data.

For example, the generator 58 clock C the channels generates the clock signal of the read data, consistent with the timing of the readout and signal matching addresses, in accordance, inter alia, with the team addresses starting reading received from the controller 63.

On the basis of the clock signal reading obtained from the generator 58 of the clock signals, in order to read the data of the user, the CPU 59 of the generated data highlights the synchronization pattern data from the read channel data, performs a process RLL (1, 7) PP demodulation, the process of interleaving and decoding process code with error correction (ECC).

Read user data transmitted to the host computer 64 via the controller 63.

The controller 63 is connected with the host computer 64 through its interface, and thus the controller 63 can communicate with the host computer 64. Additionally, the controller 63 controls the entire reader.

For example, the controller 63 receives a command to read from the host computer 64. Assume that the command read is a command making a request to forward the data recorded on the disk 50, the host computer 64. In this case, first, the controller 63 controls the operation of finding the position specified by the address contained in the command to read. That is, the controller 63 generates a search command circuit 53 servo puller. The search command pre is picavet circuit 53 servo puller to move the block pickup 51 in position, where possible the access to the target specified by the address contained in the search command.

Next, perform any required operation for sending data from a particular data segment in a host computer 64. That is, data is read from the disk 50 and then decoded in the CPU 55 of the read signal and the processor 59 a few data in order to retrieve the requested data and to transfer the received data to the host computer 64.

Incidentally, the RAM disk uses a template 9T as a template synchronizing data, while the ROM corresponding to the implementation of the invention uses a template 10T as a template synchronizing data, as described above. Therefore, the processing system that performs the allocation of the synchronization data and/or synchronization of frames, it is necessary to switch from pattern 9T on the template 10T and back.

The allocation process of synchronizing data in the CPU 59 of the generated data block 56 of the generation timing of the spindle and the decoder 57 address. It should be noted that the CPU 59 of the generated data block 56 of the generation timing of the spindle and the decoder 57 address each may be provided with a selection path clock data intended for the selection of templates synchronization data contained in the signal generated data. Or only what about one of the components (or the CPU 59 of the generated data or the block 56 of the generation timing of the spindle, or the decoder 57 address) is supplied to the data path allocation, synchronization data, and the clock selection data is transmitted to other components that do not have the selection path clock data.

In both cases, the controller 63 controls the switching of the allocation method of synchronizing data used in the selection path clock data, i.e. switching between template definition 9T and template definition 10T and back, depending on whether the disk 50 from which to retrieve data, RAM or ROM disk.

So, the first step F101 flowchart shown in Fig, the controller 63 performs the process of determining the type of disc 50 that is installed in the reader. Typically, the controller 63 determines whether the disc 50 is inserted into the reader, RAM or ROM disk, using the methodology that is used as a way of identifying reflectivity or retrieve data on the disk type of the management information from the disc 50 when the disc 50 is inserted into the reader.

If the disk 50 that is inserted in the reader, is recognized as a ROM disc, the reading process proceeds from step F102 to step F103, on which way to define templates 10T is taken as the detection method of synchronizing the data.

If the disk 50 that is inserted in the reader, is recognized as a RAM disk, the read process proceeds from step F102 to step F104, which is a way of identifying patterns 9T accepted as a method of determining synchronization data.

Next, the read process proceeds to step F105.

Switching method of determining synchronization data as described above, the reader has the ability to read data from the RAM and ROM drives.

It should be noted that, as explained in the descriptions of typical formats I and II represent the data ROM drive, for example, in the initial part of each USD formed a buffer, and in the final part of the USD, a different buffer, the data buffers form the segment size in the two frames, which is an area mates and occupied by the opening and closing areas even in the case of ROM. Therefore, the synchronization frame and the decoding process of the data frame can be carried out by the system, the total for RAM and ROM drives.

The description given so far, considered the ROM and the reader, which correspond to the implementation of the present invention. However, the present invention is not limited to implementation options discussed above. That is, there are many possible modifications of the above.

As is typical what about the format of the data ROM of the ROM enough to offer implementation, in which at least provides the field of mates (or buffers)that are located as well as in RAM disk, and ensure that areas of synchronizing data met at regular intervals (equal to the length of the frame between frames.

Additionally, while the reader is connected to the main computer 64, as shown in Fig, the reader can be attached to another device such as an AV (audio visual) device. In addition, it is also possible implementation in which the reader is not connected to any device. In this case, the reader is supplied with the command unit and the imaging unit, which provides the user interface for data input and output, and their configuration is different from the configuration shown in Fig. That is, data is written and read to and from the disk 50 in accordance with operations performed by a user, and a terminal or a microphone and a monitor for input and output of various kinds of information.

Additionally, while this implementation offers the reader, it is also possible to realize the recording/reading device capable of recording data on a RAM disk.

Information confirming the possibility of carrying out the invention

As clearly C explanations, above, in the data representation format of the media, read-only, corresponding to the present invention, provides for opening and closing a data region that serve as buffer areas and located in the initial and final parts of the block, respectively, and the block is USD used as a unit of writing and reading data to and from storage media. That is, the storage medium, a read-only (ROM or disk), formation of areas of mates required for a writable/readable media (or RAM disk). Therefore, for the media, read-only, used way of organizing data that is identical to the method used for writing in/reading media. This is done in order to obtain good compatibility with recordable/readable media.

That is, the reader is able to read data from the storage medium is read-only and recordable/readable media using the processing system decoding, shared media, read-only and recordable/readable media. This means that slightly increasing the price of recordable/readable device designed, for example, for RAM, it is possible to obtain a device capable of reading data from storage media, read-only (ROM or disk).

The media is read-only, corresponding to the present invention and provided with a region pair, serving as a buffer, has an excellent opportunity for random access to data. Therefore, as a so-called media, read-only and used as an AV (audiovisual) media or computer storage medium, the storage medium is read-only and the corresponding present invention can show excellent performance.

In addition, in each area of the data available in the media, read-only and the corresponding present invention, and which is reserved for the opening and closing of areas, logged areas synchronizing data, and their location distant from each other by a distance equal to the interval for synchronizing data between consecutive frames. Thus, synchronizing data always appear at regular intervals in the read signal. As a result, the media is read-only and the corresponding present invention, has the advantage in the organization and ensure the icenii synchronization. Additionally, the storage medium is read-only and the corresponding present invention increases the efficiency of the reader.

Moreover, if the areas of synchronizing data in the buffer zone are recorded only at the position distant from each other by a distance equal to the interval between synchronizing data for consecutive frames, the media is read-only and the corresponding present invention also has the advantage consists in the impossibility of the situation incorrect recognition templates synchronization data, as well as in optimal performance and synchronization of various processes, including the process of generating the phase error signal of the spindle.

Moreover, the pattern of the data, at least one portion of the sync data recorded in the buffer region differs from templates synchronization data frame in the sequence. Therefore, the storage medium is read-only and the corresponding present invention, it is optimal to prevent incorrect identification of the address block.

In addition, if the data pattern with the first inverted interval is used as the synchronizing data in a recordable/sityva the IOM media (RAM disk) the pattern data with the second inverted interval is used as the synchronization data in the storage medium is read-only and the corresponding present invention. Therefore, the storage medium is read-only and the corresponding present invention, is optimal from the point of view of preventing incorrect determination of synchronizing the data used in this process as the generation of the signal phase error spindle performed based on the selected synchronization data in the asynchronous condition.

In accordance with the reader, provided by the present invention, and a method of reading for this unit it is possible to work even with a case in which there is a difference in brightness between the templates synchronizing data to the storage medium is read-only and recordable/readable media. Then there is the possibility of switching determining synchronization data in such a way as to work with the media, read-only and recordable/readable carrier, for which the synchronization data is used accordingly, the pattern data with the first inverted interval and the template data is that the inverted interval. In the end, it is possible to implement the reading process, using a system of decoding data and decoding addresses, shared media, read-only and recordable/readable media.

1. The media is read-only and is designed to write data, read-only, and data is written in blocks, each of which is used as a writable/readable unit, in which:

each of these blocks has an opening region data that serves as the primary buffer region, the cluster containing several consecutive frames, each of which, in addition to the basic data is synchronizing data, and closing the data area that serves as the destination buffer area; and

the said blocks are written to the specified storage media, read-only, in compliance with the format, providing that at least part of the synchronization data is recorded in separated from other areas at the start and end of buffer areas, which are reserved for respectively opening region data and end data region on the border between any two consecutive blocks, the distance between them is equal to the length of the period of synchronizing data in successive frames.

2. The media is read-only, according to claim 1, characterized in that in said buffer areas synchronizing data are recorded only at such places, which are distanced from each other by a distance equal in length to the period of the clock data in successive frames.

3. The media is read-only, according to claim 1, characterized in that the template data, at least one of the specified areas synchronizing data in the buffer areas is different from the synchronization pattern data provided in these consecutive frames.

4. The media is read-only, according to claim 1, characterized in that the data pattern of the second inverse interval is used as the synchronization data, recorded between successive frames in the buffer areas, in contrast to the pattern data of the first inverse interval, which is used as the synchronizing data recorded on the recordable/readable media, with the ability to record data and read the already written data, where much like the media, read-only:

these data are recorded on the recordable/readable media in the form of a sequence of blocks, which each of them is used as the unit of recordable/readable information;

each of these blocks has a data format including the opening region data that serves as the primary buffer region, the cluster containing several consecutive frames, each of which, in addition to the basic data is synchronizing data, and closing the data area that serves as the destination buffer area.

5. The reader designed to read data, corresponding to:

as a writable/readable media that allows you to write to and to read previously written data, where:

these data are recorded on said writable/readable media in the form of a sequence of blocks, each of which is used as a unit of recordable/readable information;

each of these blocks has a data format including the opening region data that serves as the primary buffer region, the cluster containing several consecutive frames, each of which, in addition to the basic data is synchronizing data, and closing the data area that serves as the destination buffer area; and

the data pattern of the first inverse interval is used as the synchronization data; and

and the media and the formation, read-only and intended to write data, read-only, where the data are recorded in a sequence of blocks, each of which is used as a unit of recordable/readable information, where:

each of these blocks has an opening region data that serves as the primary buffer region, the cluster containing several consecutive frames, each of which, in addition to the basic data is synchronizing data, and closing the data area that serves as the end of the buffer region;

each of these blocks is recorded on the storage medium, a read-only format, providing that at least part of the synchronization data is recorded in separated from other areas at the start and end of buffer areas, which are reserved for respectively opening region data and end data region on the border between any two consecutive blocks, the distance between them is equal in length to the period of the clock data in successive frames; and

the data pattern of the second inverse interval is used as the synchronization data, the specified reader contains:

medium spans the VA reader for reading information from storage media, inserted in the device;

means for decrypting the data intended for the synchronization frame and the decoding process data based on the synchronization data extracted from information read from the inserted media specified by means of reading;

means of decoding addresses, perform the process of specifying the address-based frame synchronization data extracted from information read from the inserted media specified by means of reading; and control means designed to control the execution of:

allocation process specified clock data produced by allocating data patterns of the second inverse interval, if inserted in the reader, the media is media that is read-only; and

allocation process specified clock data produced by allocating data patterns of the first inverse interval, if inserted in the reader a medium is a writable/readable media.

6. The method of reading applied to the reader if installed in the device:

a writable/readable nose of the body, allows you to write to and to read previously written data, where:

these data are recorded on said writable/readable media in the form of a sequence of blocks, each of which is used as a unit of recordable/readable information;

each of these blocks has a data format including the opening region data that serves as the primary buffer region, the cluster containing several consecutive frames, each of which, in addition to the basic data is synchronizing data, and closing the data area that serves as the destination buffer area; and

the data pattern of the first inverse interval is used as the synchronization data; and

media, read-only and is designed to write data, read-only, where the data are recorded in a sequence of blocks, each of which is used as a unit of recordable/readable information, where:

each of these blocks has an opening region data that serves as the primary buffer region, the cluster containing several consecutive frames, each of which, in addition to the basic data is synchronizing data, and for ryuudou the data area, serves as the end of the buffer region;

each of these blocks is recorded on the storage medium, a read-only format, providing that at least part of the synchronization data is recorded in separated from other areas at the start and end of buffer areas, which are reserved for respectively opening region data and end data region on the border between any two consecutive blocks, the distance between them is equal in length to the period of the clock data in successive frames; and

the data pattern of the second inverse interval is used as the synchronization data, the specified method of reading includes the steps:

determine whether mounted in said device for reading the storage medium recordable/readable media or storage media is read-only;

the process of identifying these synchronizing data using the selection pattern data of the second inverse interval, if the installed media is the media, read-only, or the process of identifying these synchronizing data using the selection pattern data of the first inv is sterowania period, if the installed media is recordable/readable carrier; and

the process of synchronization frames, the decoding process data and the process of determining the address of the frame, where these actions are performed based on the selected synchronization data.



 

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