Disk device recording information and a disk playback device information

 

(57) Abstract:

Usage: in information technology, in particular in the disk device for recording and reproduction of information. Essence: disc recorder provides a record of information in such a way that a short time the digital data is hosted on a given set of clusters with an interval of a predetermined number of sectors, linking the cluster sector, whose length exceeds the length of the interval alternation, is added to each of the connecting parts of each cluster, and the digital data is sequentially interspersed and are recorded on the disc-shaped recording medium so that the alternation during the recording data according to the rule "cluster by cluster" is inside length connecting the cluster sector. Disk reproducing device provides for the formation of reproducible data by reproducing the record data recorded on the disc-shaped recording medium in such a way that it is provided interval alternation in each connecting part of each cluster, composed of a predetermined number of sectors generated data peremariana and recorded on discoun who are from linking clusters of sectors before writing into the storage device. Reproducible data begins to be recorded in the storage device, when the volume of the reproduced data stored in the storage device becomes smaller than a predetermined amount, to save memory space read - more than a predefined amount of data. 6 C. p. F.-ly, 1 Il.

The invention relates to the accumulation of information, in particular to a disk recording device and/or disk reproducing device.

Known disk device recording and reproducing information containing the coding block associated with the analog-to-digital Converter and the recording unit, the servo control unit associated with the disk drive carrier and block the system control block of random access memory (NVR) associated with the system control unit, a display unit and keyboard.

However, when continuous playback is required and several operations mestorozhdenii navigation over large distances, corresponding to the distance from the inner to the outer periphery of the disc. Because mestorozhdeniy transition cannot be performed immediately, reproducible data disappear at some Cordelia the recording continuous audio signals, no ability to record, for example, only signals of a specific sector, because the data must undergo the alternation during recording. That is, the data of this sector should be peremariana with adjacent and even neighbors sectors, therefore, becomes a necessity overwriting signals previously written sectors. Thus, it is extremely difficult to record a continuous compressed audio data.

In addition, it is desirable that there is a possibility of switching between the above-mentioned multiple modes of compression, since this could significantly extend the applicability of the recording-playback device. However, if you need to change the speed of rotation of the disk, the sequence of recording or the operation of the signal processing for each of the compression modes, selected by switching, the circuit part is too complicated to you would be to create a budget device. Therefore, it is preferable that the change of control transactions, sequences recording or processing of signals caused by different modes of compression, would be minimal.

The main purpose of the present invention awlaelo continuous recording and continuous playback even when using the small disk size.

Another objective of this invention is to provide a disk recording and/or reproducing device, in which there would be no difficulty in handling due to the displacement at the time of recording compressed audio data to disk.

Another objective of the invention is to provide a disk recording and/or reproducing device in which a minimized change in the control or processing signals operations caused by switching between some of the many modes of compression.

The present invention provides the creation of a disk recording device for recording compressed digital data on the disc-shaped recording medium containing a storage device for temporary storage of digital data and a device for placing named digital data read from the named storage device, according to a certain set of clusters with an interval of a predetermined number of sectors, adding linking clusters sector to the connecting parts of each of these clusters, with each of these binding cluster sectors long interval multiplication for the above mentioned digital data sequentially clicks the x data in the above disc-shaped recording medium.

The present invention also provides for the creation of a disk playback device containing the playback device for playback from disc-shaped recording medium on which the compressed digital data that is located on a certain set of clusters with an interval of a predetermined number of sectors, and linking cluster each long segment alternation in connecting parts of each of these clusters and consistently peremariana, a storage device for temporarily storing reproduced data read from the named reproducing device, and the controller causes the recording called reproducing the data when the volume named reproducing data filled in the said storage device is less than a predetermined amount, to read the field in the named storage device supported more predefined amount of data.

Storage device minimizes changes in the operation of the recording-playback caused by different modes of compression, and at the same time absorbs fluctuations during the operation of the recording-playback caused by trojstvo speed data transfer, appropriate modes of compression, and read intermittently, i.e., in batch mode, predefined standard data transfer rate for recording on the disc-shaped recording medium. During playback data is reproduced intermittently, i.e., in batch mode, with the disc-shaped recording medium to a predetermined standard speed data, and stored in the above storage device to be read at data transfer rates that meet prevailing compression mode.

The recording on the disc-shaped recording medium is performed by the rule of "cluster by cluster". Because linking cluster sector is longer than the interval alternation is located between adjacent clusters, the recording may be accomplished by inserting connecting the cluster of sectors to avoid the effect of the alternation of the neighbouring clusters.

When using clusters and connecting the cluster of sectors as the unit recording recording can be performed independently by the rule of "cluster by cluster" without having to consider the effects of alternation on the other cluster, allowing easier handling and perezapisav the x data due to the binding of the cluster of sectors can be buffered using the storage device, designed to temporarily store the reproduced data read from the storage device.

The drawing shows a structural diagram of a disk zapisyvaus-reproducing device corresponding to the invention.

In the disk recording-reproducing device, a magneto-optical disk 1 is driven into rotation of the spindle motor 2. The laser light radiated by the optical head 3 on the magneto-optical disk 1; a magnetic field, modulated recorded data is generated by the magnetic head 4. On the other hand, the recording track of the magneto-optical disk 1 is monitored by the optical head 3, which covers its laser light for photomagnetic playback of recorded data.

The optical head 3 consists of a laser light source, like a laser diode, optical components, such collimator lens, an object lens, the polarized beam splitter beam or cylindrical lens and the target photodetector, although these components are not shown, arranged so that the facing magnetic head 4 and the magneto-optical disk 1 is placed between them.

The output signal of the optical head 3 PI tracking and passes them to the block 6 servo, at the same time converting the reproduced signals into corresponding binary signals.

Unit 6 consists of focusing sarvotham, witness sarvotham, schemes servo spindle motor and chain servopress schemes, but these schemes are not depicted. Focusing servopress scheme performs control of the focusing optical system of the optical head 3 so that the error signal, the focus was reduced to zero. Witness servopress the system manages tracking of the optical system of the optical head 3 so that the signal of the tracking error is reduced to zero. Diagram of the servo control of the spindle motor drives the spindle motor 2, providing rotation of the magneto-optical disk with a predetermined rotation speed, a constant linear velocity. Servopress circuit causes the optical head 3 and the magnetic head 4 to move to the position of the target track on the magneto-optical disk, which indicates the system controller 7.

The system controller 7 is connected to the keyboard input operating section 8 and the display section 9. The system controller 7 keeps taking into account the information about the addresses posledovatelnyi according to the position of recording, as well as the playback position on the recording track traced by the optical head 3 and the magnetic head 4. The system controller 7 causes the display section 9 to display the bit compression on the basis of the data mode bit compression in the playback system. The system controller also causes the display section 8 to display the playing time on the basis of the coefficient data compression and data reproducible position on the recording track mode bit compression.

To display the playing time information about the addresses of consecutive sectors (information about the absolute duration) read from the recording track of a magneto-optical disk, multiplied by the inverse of the data compression ratio in the compression mode data (i.e., four in the case of compression ratios 1/4) to determine the actual duration displayed on the display section 9. It should be noted that if information about the absolute duration was pre-recorded (pre-formatted) on the recording track of the magneto-optical disk, a pre-formatted information about the absolute duration can be read during zapisywania time recording.

The recording system is equipped with an analog-to-digital Converter (ADC) 10, which receives the analog audio signal from the input terminal 11 through the low pass filter 12.

Digital audio data generated ADC 10, is transmitted to an adaptive differential pulse code modulation coder (DPCM encoder) 13 (second block coding), which processes data transmitted with the standard speed of the digital audio data from the audio encoder 13 by the operation of the data compression in accordance with a variety of modes CD-1 system.

In relation to the alternative implementation shown in the drawing it is assumed that the sampling rate of analog-to-digital Converter 10 is equal to the sampling rate of the standard CD-DA format, i.e., 44.1 kHz, and that the encoder 13 bit compressed from 16 bits to 4 bits is performed after converting the sampling frequency in accordance with the mode of compression, for example, after switching from 44.1 kHz to of 37.8 kHz for level C. alternatively, the sampling rate of the analog-digital Converter 10 may vary in function of the compression modes. In this case, the cutoff frequency of the filter bandwidth lower frequency 12 is also controlled by the switching function of frequency sampling analog-to-digital promisisti on modes of compression.

The block 14 of the random access memory (SOUP) is used as a buffer memory in which writing and reading of data is controlled by the system controller 7 and which temporarily stores the audio data received from the encoder 13 for recording on the disc, as circumstances require. In other words, in stereo level In the encoded audio data received from the encoder 13, are transmitted at the speed component of one-fourth the standard data transfer rate of 75 sectors (sec, i.e., of 18.75 sectors), sec, and these compressed data are continuously written into the memory 14. Although this is sufficient to record compressed with a frequency of every four sectors, it is almost impossible to write data in the same frequency due to the execution of the alternation, and therefore the sector is recorded continuously, as will be explained below. This recording is performed in batch mode (intermittently) on the standard data transfer rate of 75 sectors/sec, using the idle time of the compressed time-series data as a unit of account, a cluster composed of a predefined number (e.g., 32 plus some) sectors. In other words, in the memory 14 audio in stereo level recorded in low with the data in batch mode at the above mentioned transfer rate of 75 sectors/sec. The total transfer rate when reading or writing thus including the period of Nezavisimaya below of 18.75 sectors/second. However, the instantaneous value of the velocity data during the batch mode is above the standard rate of 75 sectors/sec. Therefore, if the rotation speed of the disk is the same as for CD-DA format, i.e., the linear velocity is constant, the recording is performed with the same recording density and with the same sequence of recording, which are accepted for CD-DA format.

Audio data read in the memory 14 in batch mode at the transfer rate of 75 sectors/sec, i.e., the recorded data are transferred to the encoder 15 (the first block coding). In the sequence data, the unit of data is continuously recorded in each cycle of recording, consists of a certain number (for example, 32 sectors and multiple binding cluster areas that are located before and after the cluster. Linking the cluster-sector long interval alternation used encoder 15 so that, even if the sector is undergoing a move, the data of other clusters remained unchanged.

The encoder 15 processes the recorded data by encoding bug fix, like adding priteni magnetic head block 16 entries.

On the other hand, the system controller 7 performs control of writing and reading from the memory 14 and, based on the memory management performs the positioning control of the recording disk so that the above recorded data read from the memory 14 in batch mode, is recorded continuously on the recording track of the magneto-optical disk. To control the positioning of the recording on the disk data read from the memory 14 in batch mode, the position of the record is observed by the system controller 7 and the control signals indicating the position of recording on the recording track of the magneto-optical disk is transferred to servopress scheme 6.

Reproducing system adapted to playback the data continuously recorded above described system to a recording track of the magneto-optical disk, and is equipped with a decoder 17 (block decoding), which is associated with the encoder 15, and processes the output signal of the playback by decoding the error correction and F decoding, the decoder 17 reproduces the audio data is stereo level at the transfer rate of 75 sectors/sec, which is higher than the normal speed transmission called the tx2">

The operations of writing and reading from the memory 18 controls the system controller 7 so that the reproduced data from the decoder 17 at a speed of 75 sectors/sec, sequentially recorded on the transfer rate of 75 sectors/sec. Additionally reproduced data intermittently recorded on the transfer rate of 75 sectors/c in the memory 18, is continuously read it on normal for stereo level rate of 18.75 sectors/second.

The system controller 7 performs control of writing the reproduced data in the memory 18 at a speed of 75 sectors/sec, continuously reading out the reproduced data from the memory at a transfer rate of 18.75 sectors/sec and stopping recording to prevent overflow of data stored in memory.

The system controller 7 performs the positioning control playback on the recording track of the magneto-optical disk so that the reproduced data recorded under the above running in the memory 18 is written into it continuously. Control positioning of the playback on the disc above reproduced data read in batch mode from the memory 18 system control is but-optical disk 1, on servopress scheme 6.

Audio stereo level obtained as the reproduced data is continuously read from the memory 18 at the transfer rate of 18.75 sectors/second, are received at the decoder 19, associated with the encoder 13 of the recording system. Reproduced digital audio data transmitted by the decoder 19 to d / a Converter 20 (DAC), an analog audio signal which is issued through the filter the lower frequencies of 21 and output terminal 22.

Reproducing system disk zapisyvaus-reproducing device corresponding to the present version of the implementation, is provided with a digital output to the digital audio data from the output of the decoder 19 was issued to the terminal 23 of the data output through the digital output encoder 24 in the form of digital audio.

1. Disk device recording information containing a / d Converter, whose input is connected to the input terminal of the analog signal, the first block coding with error correction, the output connected to the input of the write block data groups at intervals of the specified number of sectors on the disk recording medium, the servo control unit, the output associated with the drive Dima input of the first block coding with error correction, the block of random access memory associated bidirectional bus system control unit, the second output and the input of which is connected respectively to the input unit of the display and access the keyboard, characterized in that it introduced the second coding block, the first input connected to the output of the analog-to-digital Converter, and the set of reference signals, the first output of which is connected to the second inputs of the write block data group and the second coding block, and the second output to the second input of the servo control unit, the output of the extended time-series data of the second coding block is connected to the input of a block of random access memory, the output of the compressed time-series data which is connected to the first input of the first block coding with error correction of digital data in groups, each of the linking sectors which exceeds the length of the interval alternation of digital data within each data group.

2. The device under item 1, characterized in that the system control unit is configured to continuously read from the memory block with arbitrary sampling and subsequent continuous recording of the first specified number of data when the number stored is tion data.

3. The device according to p. 2, characterized in that the second specified number of data corresponds to the amount of data in one data group.

4. The device according to p. 1, wherein the linking group data sector consists of dummy data that do not affect the digital data in the appropriate group.

5. The device under item 1, characterized in that one sector of digital data corresponding to one block or 98 frames modulated when converting 8 - 14 data CD-ROM.

6. The disk playback device information containing digital to analog Converter, an output connected to the output terminal of analog data, the first block decoding with error correction, a second input connected to the first output of the system control unit, the second output and the input of which is connected respectively to the input of the display unit and the output of the keyboard unit of the playback data groups and intervals of the specified number of sectors from a disk recording medium, an input connected to the first output of the servo control unit, the second output of which is connected to the drive disk recording media, and the first input with the first output unit system management associated d is to decode output connected to the input of digital to analog Converter and a second input from the first output unit of the system control and processing unit of the reference signal, an input connected to the output of the groups of digital data, a connecting part which exceeds the interval alternation, unit vosproizvedeniya groups at intervals of the specified number of sectors, the output of the processing unit of the reference signals is connected to the second input of the servo control unit and to the first of the first block decoding with error correction, the output of the compressed time-series data which is connected to the input of the block of random access memory, the output of the extended time-series data which is connected to the first input of the second block decoding.

7. The device according to p. 6, characterized in that the system control unit is configured to start continuous playback of digital data when the amount of stored data in the block of random access memory, less a specified amount of data, with the preservation of this specified number of data, and repeat playback of the digital data when it is written in the block of random access memory.

 

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