JPH0536070A - Disk recorder - Google Patents

Abstract

(57) [Summary] [Purpose] Compressed data in which an integer number of compressed frames are completely recorded in an integer number of recording sectors and the continuity of the compressed frames on the disk is always guaranteed even when rewritten. A disk recording device for realizing recording is provided. A compression unit 22 performs data compression processing on digitally encoded input data, and additional information about the compression processing is added to form a compressed frame of a fixed length. The sector generation unit 24 compresses M pieces of data. A frame is divided into N recording sectors to generate a recording signal, and a sector address 81 that circulates in a cycle of N sectors in which M compressed frames are recorded is added,
The optical disk 2 is recorded by the recording means 26 in units of N sectors.
Record at 9. Further, the sector address detecting means 93 obtains the reproduction sector cycle information 94, and based on this information, the compressed frame to be newly recorded is divided into every M pieces or the above-mentioned sectors are divided into every N pieces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording apparatus for recording compressed information such as voice on a disc.

[0002]

2. Description of the Related Art In recent years, compact discs (hereinafter referred to as
Write as CD. ) Is very popular. Although the CD is for reproduction only, the technology of a disk recorder for recording / reproducing a digital signal using a disk has been actively announced, and a part of the CD has been commercialized. .

As an example of a conventional disc recorder, a disc recorder for recording and reproducing using a CD format has been proposed and announced.

A disk recorder using the conventional CD format will be described below.

FIG. 19 is a diagram showing the signal format of this conventional CD. 19, 101 is a synchronization signal, 102 is a subcode, 103 is digital audio data, and 104 is a parity for error correction.
A recording frame is composed of the array and the number of bytes shown in FIG.

FIG. 20 is a block diagram showing the structure of an optical disk recorder for recording and reproducing using the format of the CD shown in FIG. In FIG. 20, the optical disk 105 is rotated by the spindle motor 106, and the optical head 1
A signal is recorded on the spiral track by 07, and the recorded signal is reproduced by the same optical head 107. As the input signal 108, for example, a digitized audio signal or the like is input. The recording signal processing means 109 adds and modulates an error correction code, a subcode, a synchronizing signal, etc. to the input signal 108 based on the CD format shown in FIG.
0 is generated, and the optical disk 107 is generated by the optical head 107.
Recorded in 5. On the other hand, the reproduction signal 111 reproduced from the optical disc 105 by the optical head 107 is demodulated by the reproduction signal processing means 112, subjected to sync signal / separation / extraction of subcodes, error correction processing, etc., and output as an output signal 113, which is an audio signal. Is converted to.

By the way, in recent years, there has been a remarkable progress in data compression technology for carrying out data transmission or data recording / reproduction with a smaller amount of information while preventing deterioration of signal quality. For example, a method of compressing the information amount of a sampling frequency of 48 KHz and a quantization bit number of 16 bits used in DAT etc. to 1/4, that is, an average of 4 bits per sample is MPEG (Moving Picture Experts Group).
Has been proposed by. In this compression method, an acoustic signal is divided into a plurality of bands (subbands) by a bandpass filter group.
This is a method of flexibly allocating the number of bits for each band according to the energy of the signal and the auditory characteristics.

FIG. 21 shows a compressed data format proposed by MPEG. In FIG. 21, SYNC is a synchronization signal for detecting the synchronization of the compressed frame in the compressed data stream, and a predetermined 16-bit fixed pattern is used. 16-bit is allocated to the SYSTEM as system-related information such as sampling frequency of original information, copy prohibition / permission information, and emphasis. ALLOC is 256 bits of bit allocation information of each subband, SCALE is maximum 384 bits of scale information of each subband, and SAMPLE is minimum 2400 bits of sample data of each subband.
One compressed frame is configured so that the total number of bits is always 3072 bits.

[0009]

However, considering the case where the data compressed as described above is recorded in the optical disc recorder based on the above-mentioned CD format, C
The recorded data in the D format originally does not have the data delimiter called the compressed frame as described above, the sampled data is continuously input, and the recorded frame which is a recording unit on the optical disc is not a compressed frame at all. It is generated independently. Therefore, recording start, end,
Furthermore, if continuous recording or overlapping recording is performed, the continuity of the compressed frames recorded before and after that is not guaranteed at all, and the discontinuous compressed frame is subjected to mute processing and interpolation processing during playback. Depending on the situation, there was a problem that it was output as an abnormal sound.

The present invention solves the above-mentioned problems of the prior art. Even when an integral number of compressed frames are completely recorded in an integral number of recording sectors and rewriting is performed, the compressed frames on the disc are always recorded. It is an object of the present invention to provide a disk recording device that guarantees continuity and therefore realizes compressed data recording without generation of abnormal noise or the like at a connection point.

[0011]

In order to achieve this object, the disk recording apparatus of the present invention performs a compression process on digitally encoded input data, and adds supplementary information regarding the compression process to a certain length. Data compression means for forming compressed frames, and recording signal generation means for generating recording signals by dividing the M compressed frames (M is a positive integer) into N recording sectors (N is a positive integer). And have.

Further, according to the present invention, the compression processing is performed on the digitally encoded input data, and additional information related to the compression processing is added to form a compression frame of a fixed length, and the compression frame, Memory means for performing time-axis compression, and M (M is a positive integer) compressed frames read from the memory means are divided into N (N is a positive integer) recording sectors to generate a recording signal. Recording signal generating means for generating the recording signal.

Further, according to the present invention, the recording operation is performed only in units of N sectors in which M compressed frames are recorded.

Further, according to the present invention, a sector address that circulates in a cycle of N sectors is recorded in each sector.

Further, the present invention separates and extracts sector addresses that circulate in a cycle of N sectors from already recorded sectors, and extracts M compressed frames when newly recording based on the extracted timing. The recording sector is divided or divided into N recording sectors.

Further, according to the present invention, flag information for identifying the cyclic period of N sectors is recorded in the sector.

Further, according to the present invention, the flag information which circulates in the cycle of N sector is separated and extracted from the already-recorded sector, and the compressed frame for every M compressed frames is newly recorded on the basis of the extracted timing. The recording sector is divided or divided into N recording sectors.

[0018]

According to the present invention, with the above-mentioned configuration, the N recording sectors are formed by using the M compressed frame data, so that the compressed frame is always completed in the recording sector unit,
It is possible to prevent a change in the recording sector.

Also, when data compressed at a low transfer rate is recorded on the disk at high speed and intermittently by using the time-base compression memory, the compression of M data read from the time-base compression memory is performed. By constructing N recording sectors using frame data, it is possible to similarly complete a compressed frame in units of recording sectors.

Further, by limiting the unit for starting and ending the recording to the unit of the N recording sectors, it is possible to guarantee that the sectors recorded on the disc are always composed of integer compressed frames. It will be possible.

Further, a sector address that circulates a unit of N recording sectors that completes the M compressed frames recorded on the disk by N is added to each sector, or M recorded on the disk. N compressed frames circulate
By adding flag information indicating the unit of each recording sector to the sector, it is possible to easily detect the recorded N sector cycle, and further to record M compressed frames or N compressed frames when newly recording. By synchronizing the sector unit with the recorded N sector cycle, it is possible to always complete the compressed frame at the connection point even when joint recording or overlapping recording is performed, and the compressed frame is also recorded at the recording connection point. Smooth connection is possible without disconnection and no abnormal noise is generated.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a sector format of a rewritable disc used for recording in the first embodiment of the present invention. In FIG. 1, the sector is composed of a total of 1360 bytes (hereinafter, the byte is referred to as B). Reference numeral 1 denotes a header, which has address information and the like previously written using pits or the like when the disc is manufactured, and is composed of 52B. The area of the header 1 performs only the reproducing operation and does not record. GAP1 of 2
GAP2 of 5 and 5 are areas for starting and ending recording at the time of rewriting, and VFO of 3 is a PLL lead-in area for locking the PLL for subsequent data demodulation. The DATA / ECC area 4 is composed of 1262B. The configuration is shown in the lower part of FIG. SB of 6 is a synchronization detection signal, D of 7 is a data byte, P of 8 is an AUX byte for auxiliary data, and C of 9 is a cyclic code (C) for error detection.
RC), 10 E is an error correction code, and 11 is a data resynchronization byte. Data bytes are D1 to D102
It is composed of 1024 bytes up to 4. Generally, rewritable discs are often used for recording data files in computers and the like. Therefore, the data capacity of the sector, which is the rewriting unit, is a power of 2 including the floppy disk. The error correction code E of 10 is generated for the data in the same sector and is completed in the sector. When the DATA and ECC areas are rewritten, the areas from GAP1 to GAP2 are rewritten all at once to realize the rewriting in sector units.

In this embodiment, the compressed frame to be recorded is shown in FIG.
One frame shown in 1 has 3072 bits. When the data rate after compression is 384 Kbps (bit per second), the frame frequency is 125 Hz. Further, the sector capacity of the disk used for recording is 10 as shown in FIG.
24B shall be used. Therefore, since (3072/8) × 8 = 1024 × 3, 8 compressed frames can be recorded in 3 recording sectors.

FIG. 2 is a block diagram showing the structure of a disk recording apparatus according to the first embodiment of the present invention. In FIG. 2, the digitized input signal 21 is subjected to compression processing by the compression means 22. The compression means 22 outputs the compressed data 23 formed in the frame of FIG. 21 to the sector generation means 24. Sector generating means 24
Then, the input data is divided into sector units, error correction codes are generated and synchronization signals are added in accordance with the sector format shown in FIG. 1, and the recording sector signal 25 is output to the recording means 26. The recording means 26 outputs a recording signal 27 to the optical head 28 in accordance with the recording command output 34 provided thereto. The optical head 28 records the given recording signal 27 on the optical disc 29. The timing generation means 31 divides the input master clock 30 to generate a compressed frame clock 32 and a recording sector clock 33.

FIG. 3 is a block diagram showing a configuration example of the timing generation means 31. In FIG. 3, the master clock 30 input by the compressed frame clock generation means 35 is input.
Is divided by a constant value to generate a compressed frame clock 32. Further, the ⅛ frequency dividing means 36 divides the compressed frame clock 32 by ⅛ to ⅛ compressed frame clock 3
7 is generated. Further, the edge detecting means 38 detects the rising edge of the 1/8 compressed frame clock 37 and supplies an edge pulse 39 to the recording sector clock generating means 40. On the other hand, the recording sector clock generating means 40 divides the master clock 30 to generate a recording sector clock 33. At that time, 3 is given by the applied edge pulse 39.
Synchronization is applied for each sector. Therefore, the synchronization between the compressed frame in units of 8 frames and the recording sector in units of 3 sectors is established.

FIG. 4 is a waveform diagram showing the waveform of each part of FIGS. 2 and 3. Input data 21 has a sampling frequency of 48K
If the frequency is set to Hz, quantized 16 bits, and 2 channels, the bit rate is 1.536 Mbps, and by subjecting it to ¼ compression processing, the bit rate becomes 384 Kbps. The frame at the time of data compression is compressed frame clock generation means 34.
The compressed frame clock 32 generated in the above step is used as a reference. Since one frame is composed of 3092 bits, the compressed frame frequency is 125 Hz. The recording sector clock 33 is synchronized every three clock cycles at the rising edge of the 1/8 compressed frame clock 37 (frequency 15.625 Hz) obtained by dividing the compressed frame clock 32 by 1/8 at an arbitrary timing.

As described above, according to this embodiment, it is possible to form three sectors which are always completed by eight compressed frames.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a block diagram showing the configuration of a disk recording apparatus according to the second embodiment of the present invention. The second embodiment is an example in which the present invention is applied in the case of using a system in which data that has been compressed to 1/4 is time-axis compressed and is intermittently recorded on a disk at a high transfer rate. In FIG. 5, the digitized input signal 21
Is subjected to data compression processing by the compression means 22.
The compressed data 23 output from the compression means 22 is once written in the memory means 41 for time axis compression at the rate of the compression frame clock 32. From the memory means 41, the above-mentioned compressed frame is intermittently read as the memory read data 42 in units of compressed frames in accordance with a high-speed memory read compressed frame clock 43 matching the recording transfer rate. The memory read data 42 read at a high rate is input to the sector generation means 24 and converted into a sector structure. Subsequent operations are the same as those in the first embodiment and will not be described.

FIG. 6 is a block diagram showing a configuration example of the timing generation means 31 in the second embodiment of the present invention.
In FIG. 6, the compressed frame clock generation means 35 divides the master clock 30 to generate a compressed frame clock 32.
To generate. Further, the memory read compressed frame clock generation means 44 divides the master clock 30 to generate a high-rate memory read compressed frame clock 43. The ⅛ frequency divider 36 divides the memory read compressed frame clock 43 by ⅛, and thereafter, three recording sectors are allocated to the eight compressed frames read from the memory unit 41 as in the first embodiment. Synchronize.

FIG. 7 is a waveform diagram showing the waveform of each part of FIGS. The compression process for the input data 21 is performed at the same rate as in the first embodiment. The data compressed to 384 Kbps is time-axis compressed in the memory means 41, and is read out intermittently and in compressed frame units at a high transfer rate, which is a data rate slightly higher than three times in this example. The memory read data 42 read according to the memory read compressed frame clock 43 is 3 in 8 compressed frame units.
It is composed of recording sectors and is recorded on the disk 29 as a recording sector signal 25.

As described above, according to the present embodiment, even in the system in which the time base compression operation is performed by the memory means after the compression, it is possible to configure three recording sectors which are always completed by eight compressed frames.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a block diagram showing the configuration of a disc recording apparatus according to the third embodiment of the present invention. In the third embodiment, the recording command output 34 on the disk 29 given to the recording means 26 is synchronized in units of three recording sectors completed by eight compressed frames. The recording command is given by the system control means 5 according to the operation mode.
It is generated at 0 and is input to the timing generation means 31 as the recording command input 51. Timing generation means 31
Then, the timing of the recording command input 51 is corrected in three recording sector cycles in which eight compressed frames are completed, and it is output to the recording means 26 as the recording command output 34. The other operations are the same as those in the first embodiment, and the description thereof will be omitted.

FIG. 9 is a block diagram showing a structural example of the timing generating means 31 in the third embodiment of the present invention.
In FIG. 9, the recording command input 51 output from the system control means 50 is input to the flip-flop 61. Further, the clock input of the flip-flop 61 is input with a 1/8 divided clock 37 obtained by dividing the compressed frame clock 32 generated by the 1/8 dividing means 36 by 1/8. Therefore, the recording command output 34, which is the output of the flip-flop 61, is synchronized with the rising of the 1/8 divided clock 37.

FIG. 10 is a waveform diagram showing the waveform of each part of FIGS. 8 and 9. Since the process of compressing the input data 21 and distributing the 8 compressed frames to 3 recording sectors is the same as that of the first embodiment, its explanation is omitted. The recording command input 51 is output from the system control means 50 irrespective of the generation timing of the recording sector, is synchronized with the 1/8 frequency-divided clock 37 in the timing generation means 31, and is output as the recording command output 34. Since the recording means 26 records on the disc only during the period when the given recording command output 34 is given, by changing the recording command output 34 in units of three recording sectors in which eight compressed frames are completed. The sectors recorded on the disk can be completed in units of the above-mentioned three sectors.

As described above, according to this embodiment, recording on the disk can be performed in units of three recording sectors, which is always completed by eight compressed frames.

Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a block diagram showing the structure of a disk recording apparatus according to the fourth embodiment of the present invention. In the fourth embodiment, a sector address that cyclically goes by 3 is added to three recording sectors that complete eight compressed frames. The recording sector address 81 is generated by the timing generation means 31 and supplied to the sector generation means 24, and is recorded for each sector using, for example, the P (AUX) byte indicated by 8 in FIG. The operation of the blocks other than the above is the same as that of the third embodiment, and the description thereof will be omitted.

FIG. 12 is a structural example of the timing generating means 31 in the fourth embodiment of the present invention, and FIG. 13 is FIG. 11 and FIG.
It is a waveform diagram which shows the waveform of each part of 2. The sector address generation means 91 generates and outputs a recording sector address 81 which circulates every three sectors in synchronization with the recording sector clock 33 and the 1/8 frequency division edge clock 39. The recording sector address 81 circulating every three sectors is the sector generating means 24.
Is supplied to.

The sector address 37 is, for example, 0 → 1 in the three sector cycle of the recording sector clock 33 as shown in FIG.
→ 2 → 0 → 1 → 2 → 0 → ... is repeated, and the compressed data is recorded on the disc. Therefore, by extracting the sector address from the sector already recorded on the disc, it is possible to easily detect a group of three sectors that completes eight compressed frames.

As described above, according to the present embodiment, by adding to each sector a sector address that circulates in three recording sector periods that are completed in eight compressed frames, the circulating period of recorded sectors can be facilitated. Can be detected.

Next, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 14 is a block diagram showing the structure of a disk recording apparatus according to the fifth embodiment of the present invention. In FIG. 14, first, in the reproduction mode, the reproduction sector address detection means 93 detects the sector address already recorded on the disk described in the fourth embodiment from the reproduction signal 92, and it is completed with eight compressed frames. Three
The cyclic cycle of each recording sector is detected, and reproduction sector cycle information 94 is output. Detected reproduction sector cycle information 94
Is supplied to the timing generation means 31, and is used as a reference signal when the compressed frame clock 32, the 1/8 frequency-divided clock 37, the frequency division of the recording sector clock 33 and the generation of the recording sector address 81. The operation of the blocks other than the above is the same as that of the fourth embodiment, and the description thereof will be omitted.

FIG. 15 is a structural example of the timing generating means 31 in the fifth embodiment of the present invention, and FIG. 16 is FIG. 14 and FIG.
5 is a waveform diagram showing the waveform of each part of FIG. First, in the reproducing mode, the reproducing sector period information 94 indicating the cyclic period of the three reproducing sectors generated by the reproducing sector address detecting means 93 is the compressed frame clock generating means 35, 1.
It is input to the / 8 frequency dividing means 36, and is synchronized with the rising edge of the reproduction sector period information 94, for example. Recording sector clock generation means 40 or sector address generation means 9
Since 1 is synchronized by the 1/8 frequency-divided clock 37, as a result, the recording sector clock 33 and the recording sector address 81 are also synchronized with the reproduction sector cycle information 94. When the recording mode is changed to the recording mode in this state, the reproduction cycle sector information 94 cannot be detected. However, since the cyclic cycle of the recording sector address specified in the reproduction mode is retained as it is, the sector addresses before and after the recording connection point are stored. There is no discontinuity in the cyclic period of.

As described above, according to the present embodiment, the reproduction sector cycle information is detected from the sector address that cyclically travels in three sector cycles completed by eight compressed frames, and the cyclic cycle of the sector address to be newly recorded. Has been decided. Therefore, even in the case of joint recording or overlapping recording, it becomes possible to record a new 3-sector cycle without disturbing the cycle following the recorded 3-sector cycle, and the disturbance of the compressed frame at the recording connection point can be prevented. Since it is not generated, it is possible to obtain a smooth reproduced sound.

Next, a sixth embodiment of the present invention will be described with reference to the drawings. In the sixth embodiment, as a method for detecting the cyclic cycle in three sectors completed by eight compressed frames, the cyclic cycle is detected instead of the sector address described in the fourth and fifth embodiments. Sector sector flag information is used.

FIG. 17 is a block diagram showing the structure of a disk recording apparatus according to the sixth embodiment of the present invention. In the present embodiment, the sector cycle flag information 96 is generated by the timing generation means 31 and supplied to the sector generation means 24, and is recorded for each sector using, for example, the P (AUX) byte indicated by 8 in FIG. To be done. In this example, the sector cycle flag information is set (set to 1) only for the first sector of the three sectors.

In FIG. 17, first, in the reproduction mode, the sector cycle flag detecting means 95 detects the sector cycle flag information already recorded on the disk from the reproduction signal 92. By detecting the flagged sector, the cyclic cycle of three recording sectors completed by eight compressed frames is detected, and reproducing sector cycle information 94 is output.
The following operation and the configuration of the timing generation means 31 are the same as those in the fifth embodiment, and therefore their explanations are omitted.

FIG. 18 is a waveform diagram showing the waveform of each part of FIG. In the reproduction mode, the reproduction sector cycle information 94 indicating the cyclic cycle of the three reproduction sectors generated by the sector cycle flag detecting means 95 is generated. Similar to the fifth embodiment, the reproduction sector cycle information 94 synchronizes with the compressed frame clock generation means 35 and the recording sector clock generation means 40, and also with respect to newly generated sector synchronization flag information 96. It can be synchronized. When the recording mode is entered in this state, as in the fifth embodiment, the sector synchronization flag information 96 retains the cyclic period defined in the reproduction mode as it is, so the sector period flag information 96 before and after the recording connection point. There is no discontinuity in the cyclic cycle of.

As described above, according to the present embodiment, the cyclic cycle of three sectors completed in eight compressed frames is detected by the sector cycle flag information, and the cyclic cycle of the sector to be newly recorded is determined. There is. Therefore, even when performing joint recording or overlapping recording, it becomes possible to record a new three-sector cycle without disturbing the cycle following the recorded three-sector cycle, and the disturbance of the compressed frame at the recording connection point occurs. Since it is not performed, it is possible to obtain a smooth reproduced sound.

Although the timing generation means 31 in the first to sixth embodiments is configured to synchronize with the recording sector clock based on the compressed frame clock, this is based on the recording sector clock. It may be configured to synchronize with.

In each of the first to sixth embodiments, the time delay required for processing each block is not taken into consideration, but the timing signal supplied to each block is actually the processing time of each block. You need to delay by minutes.

[0050]

As described above, the present invention provides a data compression means for performing a data compression process on digitally encoded input data and adding supplementary information on the data compression process to form a compressed frame of a fixed length. , M (M is a positive integer) of the compressed frames, N (N is a positive integer)
By providing the recording signal generating means for generating the recording signal by dividing into the above sectors, it is possible to configure three sectors which are always completed by eight compressed frames.

Further, according to the present invention, data compression means for performing a data compression process on digitally encoded input data and adding supplementary information on the data compression process to form a compressed frame of a fixed length, and the compressed frame On the other hand, memory means for performing time base compression and M (M is a positive integer) compressed frames read from the memory means are divided into N (N is a positive integer) sectors and recorded. By providing the recording signal generating means for generating a signal, even in a system in which the time base compression operation is performed by the memory means after the compression, it is possible to configure three recording sectors which are always completed by eight compressed frames.

Further, according to the present invention, the recording operation is performed only in the unit of N sectors in which M compressed frames are recorded, so that the recording on the disk is always completed with 8 compressed frames. This can be performed in recording sector units, and it is possible to prevent discontinuity of the compressed frame at the start and end points of recording.

Further, according to the present invention, it is possible to easily detect the cyclic cycle of a recorded sector by recording the sector address cyclically in the cycle of N sectors in which M compressed frames are recorded, for each sector. You can

Further, the present invention comprises sector address detecting means for reproducing and extracting from the recorded sector a sector address circulating in a cycle of N sectors in which M compressed frames are recorded, and the sector address detecting means. Recording is performed even when joint recording or overlapping recording is performed by dividing the compressed frame for every M or newly dividing the sector for every N based on the reproduction sector cycle information output from It is possible to record a new 3-sector cycle without disturbing the cycle following the already-completed 3-sector cycle, and since the disturbance of the compressed frame at the recording connection point does not occur, a smooth reproduced sound can be obtained. Will be possible.

Further, according to the present invention, the flag information for identifying the cyclic period of the N sectors in which the M compressed frames are recorded is recorded in the sector, so that the sector address is recorded in the same manner. It is possible to easily detect the cycle period of the completed sector.

The present invention further comprises sector period flag detecting means for reproducing and extracting flag information for identifying the cyclic period of N sectors in which M compressed frames are recorded from the recorded sector. Similarly, joint recording and recording are performed by dividing the compressed frame to be newly recorded based on the reproduced sector period information output from the sector period flag detection unit into M units or N units into the sectors. Even when overwriting is performed, a new 3
It becomes possible to record the sector cycle, and since the disturbance of the compressed frame at the recording connection point does not occur, it is possible to obtain a smooth reproduced sound.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a sector configuration of a disk recording device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a disk recording device according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a timing generation means in the first embodiment.

FIG. 4 is a waveform chart showing the operation of each block of the disk recording apparatus in the first embodiment.

FIG. 5 is a block diagram showing the configuration of a disk recording device according to a second embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a timing generation means in the second embodiment.

FIG. 7 is a waveform chart showing the operation of each block of the disk recording apparatus in the second embodiment.

FIG. 8 is a block diagram showing the configuration of a disk recording device according to a third embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a timing generation means in the third embodiment.

FIG. 10 is a waveform chart showing the operation of each block of the disk recording apparatus in the third embodiment.

FIG. 11 is a block diagram showing the configuration of a disk recording device according to a fourth embodiment of the present invention.

FIG. 12 is a block diagram showing a configuration of a timing generation means in the fourth embodiment.

FIG. 13 is a waveform chart showing the operation of each block of the disk recording apparatus in the fourth embodiment.

FIG. 14 is a block diagram showing the configuration of a disk recording device according to a fifth embodiment of the present invention.

FIG. 15 is a block diagram showing a configuration of a timing generation means in the fifth embodiment.

FIG. 16 is a waveform chart showing the operation of each block of the disk recording apparatus in the fifth embodiment.

FIG. 17 is a block diagram showing the configuration of a disk recording device according to a sixth embodiment of the present invention.

FIG. 18 is a waveform chart showing the operation of each block of the disk recording apparatus in the sixth embodiment.

FIG. 19 is a schematic diagram showing a signal format of a conventional CD.

FIG. 20 is a block diagram showing the configuration of a conventional disc recording / reproducing apparatus.

FIG. 21 is a schematic diagram showing a conventional compressed data format.

[Explanation of symbols]

22 compression means 24 sector generation means 26 recording means 28 Optical head 29 optical disc 31 timing generation means 35 Compressed frame clock generation means 36 1/8 frequency divider 38 Edge detection means 40 recording sector clock generation means 41 memory means 44 Memory read compressed frame generation means 61 flip-flops 50 System control means 93 reproducing sector address detecting means 95 Sector cycle flag detecting means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Satoshi Kasahara             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Satoshi Izumi             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd.

Claims (7)

[Claims] 1. An optical disc apparatus in which a sector having a constant information recording capacity is formed on a track formed on a disc, and information is recorded in the sector using an optical head, wherein a digitally encoded input is provided. A data compression unit that performs data compression processing on the data and adds additional information related to the data compression processing to form a compression frame of a fixed length, and M (M is a positive integer) N compression frames (where M is a positive integer). A disk recording device, comprising: a recording signal generating unit for generating a recording signal by dividing the sector into N sectors, each of which is a positive integer. 2. An optical disc apparatus in which a sector having a constant information recording capacity is formed on a track formed on a disc, and information is recorded in the sector by using an optical head, which is a digitally encoded input. A data compression unit that performs a data compression process on the data and adds a supplementary information regarding the data compression process to form a compressed frame of a fixed length; a memory unit that performs a time base compression on the compressed frame; M read from the means (M is a positive integer)
Recording signal generation means for generating a recording signal by dividing the compressed frame into N (N is a positive integer) sectors.
Disk recording device equipped with. 3. The disk recording apparatus according to claim 1, wherein the recording operation is performed only in a unit of N sectors in which M compressed frames are recorded. 4. The disk recording apparatus according to claim 1, wherein a sector address cyclically recorded in a cycle of N sectors in which M compressed frames are recorded is recorded for each sector. 5. N in which M compressed frames are recorded
The compressed frame which is provided with sector address detecting means for reproducing and extracting a sector address circulating in a cycle of one sector from a recorded sector, and for newly recording based on reproduced sector cycle information output from the sector address detecting means. 3. The disk recording apparatus according to claim 1, wherein the division is performed for each M or the sector is divided for each N. 6. The disk recording apparatus according to claim 1, wherein flag information for identifying a cyclic period of N sectors in which M compressed frames are recorded is recorded in the sectors. 7. An N recorded with M compressed frames.
A sector cycle flag detecting means for reproducing and extracting the flag information for identifying the cyclic cycle of each sector from the recorded sector, and newly recording based on the reproduction sector cycle information output from the sector cycle flag detecting means. 3. The disk recording apparatus according to claim 1, wherein the compressed frame is divided into M pieces or the sector is divided into N pieces.