JPH0773593A - Device and method for recording and reproducing optical disk data, optical disk system and optical disk drive - Google Patents

Abstract

PURPOSE:To transfer data between a CD-ROM drive and a MO disk drive. CONSTITUTION:Recording capacity per one sector of a MO disk 11 is increased from 2320 bytes to recording capacity 2340 bytes in which recording capacity 2340 bytes per one sector of the CD-ROM 12 except 12 bytes of a synchronizing signal can be recorded so that a recording format of the MO disk 11 corresponds to a recording format of the CD-ROM 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a magneto-optical (MO) disk for recording data (hereinafter referred to simply as data MO).
Or it is called MO disk. ) And CD-ROM format compatibility.

[0002]

2. Description of the Related Art Conventionally, for example, data MO and CD-RO.
There was no format compatibility with M, and a simple interoperability of the data recorded in each was not conceivable.

Here, the concept of mutual entry of data will be described. As shown in FIG. 5, consider a state in which the CD-ROM reproducing device 1 and the data MO recording / reproducing device 2 are connected so as to be able to communicate with each other, for example, via a SCSI interface.

In FIG. 1, data reproduced from a CD-ROM by a CD-ROM drive 4 under the control of one host computer 3 is transferred to a data MO drive operating under the control of another host computer 5, for example. 6, a process of receiving (writing) in the data MO and recording (writing) the data MO in the data MO drive 4 and reproducing (reading) the data MO on the other host computer 5, and vice versa. Under the control of the host computer 5, the data reproduced from the data MO drive 6 is received by the one host computer 3 which controls the CD-ROM drive 4, and is reproduced (read out) on the one host computer 3. It means that processing is possible.

In particular, recently, a CD-R having a large recording capacity
The spread of OM has progressed considerably, and this CD-ROM
In addition to recording the data reproduced from the above into the data MO as described above, the demand for recording the data on a hard disk or a write-once optical disc (referred to as a WO disc) and reproducing it, or vice versa increases. Seem.

[0006] Conventionally, in order to cope with such an application, for example, a hard disk whose one sector is 512 bytes has a CD.
When porting ROM data (2352 bytes for one sector), the data in units of 2352 bytes is recorded by a so-called soft sector concept, for example, recording in 5 sectors of a hard disk. I could only do that.

In addition, the data on the hard disk is recorded on the CD-R.
In order to reproduce on the host computer which controls the OM drive, the structure was further complicated. That is, after converting the data on the hard disk and the data on the CD-ROM by an authoring system, the data is once written on a magnetic tape, so-called solid. Next, the solid-written magnetic tape is reproduced by a magnetic tape reproducing machine, a synchronizing signal and a header are added thereto, the header and the data are scrambled, and then EFM-modulated. This EFM
A glass master is laser-exposed with the modulated data, a stamper is created, and a stamping process is performed using this stamper to create a CD-ROM. By reproducing the CD-ROM thus created by the host computer controlling the CD-ROM drive, as a result, the data on the hard disk is recorded on the CD-RO.
It was supposed to be played by M drive.

[0008]

However, in the conventional technique of porting data according to the soft sector-like concept described above, a disk created according to the soft sector-like concept, in the case of the above example, a hard disk, There is a problem that the access time becomes long and the use efficiency of the disk, in other words, the usable recording capacity becomes small.

In addition, in the prior art involving the porting of data mediated by a solid magnetic tape, one disk,
For example, it takes a considerable amount of time to reproduce the data on the hard disk on the host computer that controls the CD-ROM drive, and since the device is a large-scale device, it is almost impossible for general users to use. There was a problem.

The present invention has been made in consideration of such a problem, and makes it possible to easily transfer data from the first optical disk for reproduction to the second optical disk capable of recording (writing). An object is to provide an optical disc recording device, an optical disc recording method, and an optical disc drive.

Further, according to the present invention, the data reproduced from the second optical disc capable of recording (writing) is reproduced for the first optical disc.
It is an object of the present invention to provide an optical disk reproducing device that can be reproduced (read) by a reproducing device that reproduces the optical disk.

A further object of the present invention is to provide an optical disc system which enables mutual use of a second optical disc for reproduction and a first optical disc capable of recording (writing).

[0013]

According to the present invention, a recording format is divided into a first recording block unit having a sync signal data area and a data area other than the sync signal data area. An optical disk and a second optical disk whose recording format is divided into second recording block units having a data area other than the sync signal data area are used.

For example, as shown in FIG. 2 and FIG.
In order that the recording format of the disk 11 corresponds to the recording format of the CD-ROM 12, the MO disk 11
The recording capacity per recording block unit (1 sector) of 2320 bytes to the recording capacity per recording block unit (1 sector) of the CD-ROM 12 of 2340 bytes (excluding 12 bytes for the sync signal data area SD) can be handled. The recording capacity is 2340 bytes or 2352 bytes.

[0015]

According to the present invention, the data area other than the sync signal data area of the first optical disk matches the recording format of the second optical disk, so that the area between the first and second optical disks is The data can be ported, and so-called data can be easily interoperated.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the drawings referred to below,
Components corresponding to those shown in FIG. 5 are designated by the same reference numerals.

FIG. 1 shows the configuration of an optical disk data transmission system to which an embodiment of the present invention is applied.

This optical disk data transmission system comprises a host computer 5, a magneto-optical (MO) disk drive 6 and a CD-R connected to the host computer 5.
It has an OM drive 4.

An MO disk 11 is mounted on the MO disk drive 6, and a CD-ROM 12 which is a disk is mounted on the CD-ROM drive 4.

As is well known, the rotation of the CD-ROM 12 mounted in the CD-ROM drive 4 is controlled by a CLV (constant linear velocity) method by a spindle motor (not shown). The tracking system of the CD-ROM 12 is a continuous servo system. The storage capacity of the CD-ROM 12 is, for example, 12 cm, which is considerably large at 640 MB (megabytes).

FIG. 2A shows a physical format (record data format) of the CD-ROM 12 in mode 1, and FIG. 2B shows a physical format of mode 2 of the CD-ROM 12 in units of one recording block (in this case, one sector). ing. In mode 1, a 4-byte error detection code EDC (hereinafter, referred to as B if necessary), parity P (172 bytes) and parity Q (104 bytes)
This is different from the mode 2 in that there is an error correction code ECC consisting of and an 8 byte space between which an all zero is taken.

For this reason, the mode 1 is used for the purpose of computational work which demands high reliability, and the mode 2 without error correction / detection code is relatively strict about the error rate such as image information and audio information. Used for purposes. These may be mixed and used in one CD-ROM.

Each recording block (referred to as one recording block or recording block unit) is encoded in units of 24 bytes, and 98 frames are accommodated. Therefore, 2352 bytes of data are recorded in one recording block.

The head of the above-mentioned 2352 bytes (one recording block), in other words, the top 12 bytes in the reading direction is used as a synchronization signal, and the next 4 bytes are used as a header. User data is 2048 bytes in mode 1 and 2336 in mode 2
It is a bite. To protect the sync signal, all the remaining data of the sync signal, that is, 2340 bytes, is scrambled by the M sequence. This 2
Since different data can be recorded in recording blocks in 340 bytes, the header and the other area, in other words, the area other than the sync signal data area are collectively referred to as the data area DR.

After all, the physical format (recording format) of the CD-ROM 12 is 1 per recording block.
It can be said that it is composed of a 2-byte sync signal data area SD and a 2340-byte data area DR other than the sync signal data area SD.

Referring again to FIG. 1, the data recorded on the CD-ROM 12 is read by the CD-ROM drive 4 under the control of the host computer 5, and the SCS is read.
Reproduction is performed on a speaker and a display monitor (not shown) which form the host computer 5 through the I communication line 13. In addition to the speaker and the display monitor, the host computer 5 has a computer body (CP
U, ROM, RAM), keyboard, mouse, etc.

In this embodiment, as will be described later in detail, not only the data read from the CD-ROM 12 by the CD-ROM drive 4 is reproduced on the host computer 5, but also the data is read by the CD-ROM drive 4. C
The data read from the D-ROM 12 is also recorded (written) in the MO disc 11 in the MO disc drive 6.
It is possible to do. Then, the data of the CD-ROM 12 recorded on the MO disc 11 is recorded on the MO disc.
It can also be read from the disk 11 and reproduced on the host computer 5. That is,
Mutual access of data is possible. In this embodiment, the host computers 3 and 5 are combined into one host computer 5 as compared with the conceptual explanation example of FIG. 5, but a system of two host computers may be assembled as shown in FIG. Of course.

The MO disk 11 is the spindle motor 2
1, the rotation is controlled by the CAV (constant rotation angular velocity) method. The tracking method of the MO disk 11 is a well-known sample servo method. Therefore, the MO disk drive 6 has the advantage that the seek time is short and the data access time is considerably shorter than the CD-ROM drive 4.

FIG. 3 shows a recording format of one recording block unit of a normal (conventional) MO disk.

In FIG. 3, the data of each byte is in the recording direction of the arrow from the upper left to the lower right in the figure, that is, the data D0, D1, ... D15, D16 ,.
47, TBD (TO BE DEFINED; future decision), ……,
CRC (error detection code) 1, ... CRC 8, E (error correction code) 1, 1, ... E16, 16 are recorded or reproduced in this order. The normal (conventional) recording format shown in FIG. 3 does not allow the interoperability described above and above.

FIG. 4 shows an example of a recording format of one recording block unit of the MO disk 11 according to the present embodiment, which is capable of mutual entry as described above and above.

As can be easily understood from FIGS. 3 and 4, the storage capacity of one recording block unit in the normal MO disc of FIG. 3 is 2320 bytes (16 bytes × 145 codewords). In addition, the storage capacity of one recording block unit in the MO disk 11 of the present example of FIG.
Two codewords (data D-32 to
Since 32 bytes up to D-1) have been added, 23
It is 52 bytes (16 bytes x 147 codewords).

In this case, the CD-ROM 12 shown in FIG.
Considering that the data area of 2 is 2340 bytes, it is possible to make the data of the CD-ROM 12 compatible with the MO disk 11 shown in the example of FIG.

That is, the 4-byte data of the header portion at the beginning in the data area DR (see FIG. 2) of the CD-ROM 12 is, for example, respectively written to the MO disk 11 (see FIG.
Data) of the codeword 130 of the reference) D-20 to D-1
Write corresponding to the address represented by 7. Then, the remaining 233 of the data area DR of the CD-ROM 12
The 6-byte data is converted from the code word 129 of the code word 129 of the MO disk 11 to the code word −
The 16 error correction codes E16, 16 are written in correspondence with the addresses represented up to. CD-ROM
The remaining 12 sync signal data areas SD are the MO disk 1
No need to port to 1. Therefore, MO disk 1
It is not necessary to write anything in the address represented by the data D-32 to D-21 of the codeword 130 of 1. In that sense, the recording block unit of the MO disk 11 is 235.
It turns out that 2340 bytes are sufficient instead of 2 bytes. After all, the recording format of the MO disk 11 of FIG. 5 is the same as the sync signal data area S of the CD-ROM 12.
It can be said that the recording area is divided into recording block units having a data area DR other than D.

Next, using the MO disk 11 recording-formatted in this way (as in FIG. 4), the CD-R
Mutual loading of data between the OM drive 4 and the MO disk drive 6 will be described with reference to FIG.

MO supplied from the host computer 5
Data to be recorded on the disk 11 (referred to as MO data) includes communication line 13, SCSI interface 21,
It is supplied to the modulation circuit 24 through the fixed contact 23c of the switch 23 and the movable contact 23a through the sector alignment control / ECC addition circuit 22. When the MO data is supplied from the host computer 5 to the SCSI interface 21, the movable contact 23a and the fixed contact 23c of the switch 23 are connected by the binary signal appearing on the control line 25, while the CD -C in ROM drive 4
Data read from the D-ROM 12 (CD-ROM
Data) is being supplied to the SCSI interface 21, the movable contact 23a is generated by the binary signal.
Is connected to the fixed contact 23b.

ECC by the sector alignment / ECC addition circuit 22
The MO data added with is modulated by the modulation circuit 24 from NRZ data to NRZI data, and then supplied to the optical pickup 26 through the laser diode driver 25 and the magnetic head 28 through the magnetic head driver 27. . A magnetic field according to the modulation data is generated from the magnetic head 28 for generating the external magnetic field, and the modulation data is recorded as pits on the MO disk 11 in cooperation with the laser light L from the optical pickup 26.

MO supplied from the host computer 5
When data is recorded on the MO disk 11, it may be recorded in 2320 bytes of codeword 128 to codeword-16. Codeword 130 and Codeword 1
Nothing is recorded at the address of 29.

On the other hand, from CD-ROM 12 to CD-ROM
When the CD-ROM data read by the drive 4 is to be recorded on the MO disk 11, the CD-ROM
Data is encoded by the CD-ROM encoder 29 (specifically, this encoding removes the sync signal data area SD in the recording format of the CD-ROM 12 and removes the scramble applied to the data area DR (descramble). ), And converting the EFM modulation to the NRZ modulation.), The encoded modulation data is subjected to the same processing as described above and recorded as pits on the MO disk 11 through the modulation circuit 24 and the like. The recording method in this case is as described above. That is, the 4-byte data (header information) in the header portion of the data area DR of the CD-ROM 12 is converted into the data D of the code word 130 of the MO disc 11, respectively.
Write corresponding to the address represented by -20 to D-17. The remaining 2336 bytes of data in the data area DR of the CD-ROM 12 are represented by the data D-16 of the code word 129 of the MO disk 11 to the error correction codes E16, 16 of the code word -16, respectively. Write according to.

The data recorded on the MO disk 11 is read by the optical pickup 26 and supplied to the demodulation circuit 32 through a well-known detector circuit 31 having a PLL circuit and the like. By supplying the output signal of the detector circuit 31 to the servo control circuit 33, known focus / tracking / seek servo control for the optical pickup 26 and write power control for the laser diode forming the optical pickup 26 are performed.

The output signal of the detector circuit 31 is the demodulation circuit 3
NRZI demodulated by 2 and ECC as so-called RF signal
It is supplied to the decoder 35, the CD-ROM decoder 36, and the header information detection circuit 37. The header information detection circuit 37 detects the data D of the codeword 130 in the RF signal.
CD-ROM for information recorded in -20 to D-17
12 mode 1 reference data and the CD-ROM 12 mode 2 reference data, and the result of comparison is compared to the communication line 3
9 to the CD-ROM decoder 36. Moreover, the RF signal is detected by the CD-R by the detection of the header information.
When it is determined that the data is related to the OM 12, the movable contact 38a of the switch 38 is connected to the fixed contact 38c side.

In this way, the CD-ROM decoder 36 (this function is performed by the above-mentioned CD-ROM encoder 29).
Is supplied to the host computer 5 through the switch 38, the SCSI interface 21, and the communication line 13 as data, and the RF signal decoded by the host computer 5 is transferred to the MO disk 11 on the host computer 5. The recorded CD-ROM 12
You can replay the ported data from. When reproduced in this way, there is an advantage that the data in the CD-ROM 12 can be reproduced by utilizing the high-speed accessibility of the MO disk drive 6.

The RF signal is MO when the header information is detected.
When it is determined that the data is data, the movable contact 38a of the switch 38 is connected to the fixed contact 38b. In this case, the RF signal decoded by the ECC decoder 35 is supplied as data to the host computer 5 through the switch 38, the SCSI interface 21 and the communication line 13, and is recorded on the MO disk 11 on the host computer 5. Data related to MO data can be reproduced.

In the above embodiment, the CD-ROM is used.
Although the data of 12 is ported to the MO disk 11, the MD drive is connected instead of the CD-ROM drive 4, and the CD-ROM encoder 29 and the CD-R are connected.
If an MD encoder and MD decoder are connected instead of the OM decoder 36, MD data can be transferred to the MO disk 11
In other words, it becomes possible to mutually transfer data between the MD drive and the MO disk drive. It should be noted that one frame of the MD is 24 bytes and one recording block unit (one sector) is 98 frames, and since the rotation of the disk is the CLV system, these characteristics are the same as those of the CD-ROM, Data can be ported by thinking.

Further, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various configurations can be adopted without departing from the gist of the present invention.

[0046]

As described above, according to the present invention, the data area other than the sync signal data area of the first optical disk coincides with the recording format of the second optical disk. Data can be transplanted between the second optical disk and the second optical disk, and an effect that so-called data can be easily interleaved is achieved.

Specifically, it becomes possible to transfer data between the CD-ROM drive (or MD drive) and the MO disk drive. Thus, for example, CD-
If the data recorded in the ROM (or MD) is recorded on the MO disc, the CD-ROM (MD)
The data recorded in can be accessed at high speed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an optical disk data transmission system to which an embodiment of the present invention is applied.

FIG. 2A is a diagram used for explaining a recording format (mode 1) of a CD-ROM. FIG. 3B is a diagram used for explaining the recording format (mode 2) of the CD-ROM.

FIG. 3 is a diagram provided for explaining a recording format of a normal (existing) MO disc.

FIG. 4 is a diagram used for explaining a recording format of an MO disc of this embodiment.

FIG. 5 is a block diagram provided for explaining a concept of mutual entry of data.

[Explanation of symbols]

 4 CD-ROM drive 5 Host computer 6 MO disk drive 11 MO disk 12 CD-ROM

Claims (35)

[Claims] 1. An optical disk data recording device having data writing means for receiving data reproduced by a data reproducing means from a first optical disk and writing the same on a writable second optical disk, wherein the recording format of the first optical disk is The recording area of the second optical disc is divided into first recording blocks having a sync signal data area and a data area other than the sync signal data area. An optical disk data recording device, wherein the optical disk data recording device is divided into the second recording block units. 2. The optical disk data recording device according to claim 1, wherein the first optical disk is a CD-ROM. 3. The optical disk data recording device according to claim 1, wherein the first optical disk is an MD. 4. The optical disk data recording device according to claim 1, wherein the second optical disk is an MO disk. 5. The rotation control system of the data reproducing means is C
The optical disk data recording device according to any one of claims 1 to 4, wherein the optical disk data recording device is an LV system, and a rotation control system of the data writing unit is a CAV system. 6. The tracking system of the data reproducing unit is a continuous servo system, and the tracking system of the data writing unit is a sample servo system. Optical disk data recording device. 7. The second recording block unit is 2340.
The optical disk data recording device according to claim 1, wherein the optical disk data recording device is a byte. 8. The second recording block unit is 2352.
The optical disk data recording device according to claim 1, wherein the optical disk data recording device is a byte. 9. A data reproducing means for reproducing data from a first optical disc, receiving data reproduced from a second writable optical disc, and reproducing the received data by the data reproducing means. In the optical disk data reproducing device, the recording format of the first optical disk is divided into first recording block units having a sync signal data area and a data area other than the sync signal data area, An optical disk data reproducing apparatus, wherein the recording format of the optical disk is divided into second recording block units having a data area other than the sync signal data area. 10. The first optical disc is a CD-ROM.
10. The optical disk data reproducing device according to claim 9, wherein 11. The optical disk data reproducing apparatus according to claim 9, wherein the first optical disk is an MD. 12. The optical disk data reproducing apparatus according to claim 9, wherein the second optical disk is an MO disk. 13. The rotation control method of the data reproducing means is a CLV method, and the rotation control method of the data writing means is a CAV method.
2. The optical disk data reproducing / recording device according to any one of 2 above. 14. The tracking system of the data reproducing unit is a continuous servo system, and the tracking system of the data writing unit is a sample servo system, according to any one of claims 9 to 13. Optical disk data reproducing device. 15. The second recording block unit is 234.
The optical disk data reproducing device according to any one of claims 9 to 14, wherein the optical disk data reproducing device has 0 bytes. 16. The second recording block unit is 235.
The optical disk data reproducing device according to any one of claims 9 to 14, wherein the optical disk data reproducing device is 2 bytes. 17. An optical disk data recording method for receiving data reproduced from a first optical disk and writing the same on a writable second optical disk, wherein a recording format of the first optical disk is a sync signal data area and this sync signal data. The recording format of the second optical disk is divided into second recording block units having a data area other than the sync signal data area. An optical disk data recording method, characterized in that it is recorded. 18. The first optical disc is a CD-ROM.
18. The optical disc data recording method according to claim 17, wherein 19. The optical disk data recording method according to claim 17, wherein the first optical disk is an MD. 20. The optical disc according to claim 17, wherein the second optical disc is an MO disc.
The optical disk data recording method described in the item. 21. The second recording block unit is 234.
21. The optical disc data recording method according to claim 17, wherein the optical disc data recording is 0 bytes. 22. The second recording block unit is 235.
The optical disk data recording method according to any one of claims 17 to 20, wherein the optical disk data recording method is 2 bytes. 23. An optical disk data reproducing method for receiving data reproduced from a writable second optical disk and reproducing the received data or the data of the first optical disk, wherein the recording of the first optical disk is performed. The format is divided into first recording block units having a sync signal data area and a data area other than the sync signal data area, and the recording format of the second optical disk is data other than the sync signal data area. An optical disk data reproducing method characterized by being divided into second recording block units each having an area. 24. The first optical disk is a CD-ROM
24. The optical disc data reproducing method according to claim 23, wherein 25. The optical disk data reproducing method according to claim 23, wherein the first optical disk is an MD. 26. The optical disc according to claim 23, wherein the second optical disc is an MO disc.
An optical disk data reproducing method described in the item. 27. The second recording block unit is 234.
27. The optical disc data reproducing method according to claim 23, wherein the optical disc data is 0 bytes. 28. The second recording block unit is 235.
27. The optical disk data reproducing method according to any one of claims 23 to 26, which is 2 bytes. 29. A first optical disk having a recording format divided into first recording block units having a sync signal data area and a data area other than the sync signal data area, and the recording format is the above-mentioned synchronization. An optical disk system using a second optical disk divided into second recording block units having a data area other than a signal data area. 30. The first optical disk is a CD-ROM
30. The optical disk system according to claim 29, wherein 31. The optical disk system according to claim 29, wherein the first optical disk is an MD. 32. The optical disc according to claim 29, wherein the second optical disc is an MO disc.
Optical disc system according to the item. 33. The second recording block unit is 234.
The optical disk system according to any one of claims 29 to 32, wherein the optical disk system is 0 bytes. 34. The second recording block unit is 235.
The optical disk system according to any one of claims 29 to 32, wherein the optical disk system is 2 bytes. 35. An optical disk drive for reading / writing a readable / writable second optical disk, wherein a recording format is divided into second recording block units having a data area other than a sync signal data area, When data whose format is divided into a first recording block unit having a sync signal data area and a data area other than the sync signal data area is supplied, this data is transferred to the second recording block. An encoder that encodes into a recording format divided into units, and the data read through the encoder is written into the readable / writable second optical disc and then read from the second optical disc. Set the data recording format to data other than the above sync signal data area. Optical disk drive, characterized in that it comprises a decoder for decoding the segmented recording format in the second recording block unit having a pass.