JPH09185464A - Information processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten processing time when recording/reproducing information and to reduce processing by releasing a host computer from substitutive processing by storing defect managing information showing a substitutive area for a defect read from an information recording medium. SOLUTION: When recording or reproducing data, while referring to initial defect substitutive area information stored in a memory buffer 43, substitutive processing is performed only to the relevant area. Besides, only when any defective area is discovered by checking of read-after-write at the time of recording data or only when the area unreproducible at the time of reproducing data is generated, while using the section of recording time defect substitutive area information, substitutive processing is performed for the defect. Therefore, a substitutive processing procedure for the initial defect and a substitutive processing procedure for the defect at the time of recording can be distinguished from one another corresponding to respective defective states (such as characters or features of defects) and substitutive processing can be efficiently functioned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing device such as an optical disk device for recording or reproducing information on an optical disk.

[0002]

2. Description of the Related Art In recent years, a large amount of image information of a document or the like is photoelectrically converted by two-dimensional optical scanning, and this photoelectrically converted image information is recorded in an image recording device, or if necessary. 2. Description of the Related Art Recently, an optical disc has been used as an image recording device in an image information file device capable of searching and reproducing and reproducing and outputting as a hard copy or a soft copy.

Conventionally, in such an optical disk apparatus, an optical disk for recording information in a spiral shape is used, and information is recorded or reproduced by an optical head which is linearly moved by a linear motor in the radial direction of the optical disk. It is like this.

In such an optical disk device, the defective area (block) is determined by reading the pre-header at the time of manufacture, and the data is recorded on the disk. As a result, recording is performed while skipping the defective area. Also, when recording,
Read-after-write is performed on the host computer side,
If the data cannot be read even after correction, the area (block) that cannot be read is determined to be a defective area, another block is set as a substitute block, and the record information to the defective area is recorded in this substitute block. It has become.
Then, the management information in which the defective area at the time of recording and the alternative area at the time of recording correspond to each other is stored in different memory buffers.

However, in the above-mentioned optical disk device, since the host computer manages the defective area and the alternative area at the time of recording, the processing at the time of recording and reproduction takes time, and the processing of the host computer is performed. There was a drawback that it became complicated.

[0006]

SUMMARY OF THE INVENTION As described above, it is intended to eliminate the drawback that the processing at the time of recording and reproducing takes a lot of time and the processing of the host computer becomes complicated. Processing time can be shortened, and by freeing the host computer from alternative processing,
An object is to provide an information processing device capable of reducing processing.

[0007]

An information processing apparatus according to the present invention records or reproduces information on or from an information recording medium in which defect management information indicating an alternative area for a defective area is stored. Storage means for storing defect management information indicating an alternative area for the defect read from the information recording medium, at the time of recording of information, the area to be recorded is determined by the defect management information of the storage means to determine whether it is a defect area, In the case of a defective area, the first alternative processing means for recording information in the alternative area by the defect management information, after the information is recorded, the recorded information is read out and the information is corrected by a predetermined error correction capability. When this information is not reproduced correctly, the recording area is treated as a defective area and information is recorded in another area. And a second alternative processing means for storing the correspondence between the defective area and another storage area as defect management information in the storage means, and the area to be reproduced when reproducing the information is the defect management of the storage means. Depending on the information
It judges whether it is a defective area, and in the case of a defective area, it reproduces the information for the alternative area by the defect management information, and it corrects the read information with a capacity higher than the above predetermined error correction capacity. Is constituted by the third alternative processing means for reproducing the information.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a schematic structure of an information processing apparatus of the present invention, that is, an optical disk apparatus. That is, the optical disk (information recording medium) 1 has a spiral or concentric information storage section having a constant radial pitch, and is driven to rotate by the motor 4.

[0010] As shown in FIG.
For example, a metal film layer of tellurium, bismuth or the like, that is, a recording film 1a is coated in a donut shape on the surface of a substrate formed of glass or plastics in a circular shape, and a cutout part is formed near the center of the metal film layer. A reference position mark 1 ₁ is provided.

On the optical disc 1, as shown in FIG. 3, the reference position mark _{11 is set} to "0" and "0 to 25".
5 "into 256 sectors. Variable length information is recorded on a plurality of blocks on the optical disc 1, and 36000 is recorded on the optical disc 1.
300,000 blocks are formed on the track.

The number of sectors in one block of the optical disc 1 is, for example, 40 sectors inside and 20 sectors outside. At the start position of the block, a block header A including a block number, a track number, and the like is recorded, for example, when the optical disc 1 is manufactured. When each block on the optical disc 1 does not end at the sector switching position, a block gap is provided so that each block always starts from the sector switching position.

As shown in FIGS. 4 and 5, the optical disc 1 has defect management information recorded on the innermost circumference of the recording film 1a and is composed of an alternative area, for example, an alternative process for 1000 tracks. A recording area (alternate processing recording area) a is provided, and in addition to this, a user area (user recording area) b as a recording area used by the user is provided.

As shown in FIG. 6, the alternative processing area a is a management information area (correct) c in which new and old defect management information f of 4 Kbytes is recorded, and this management information area c.
It is composed of a management information area (secondary) d in which the same information is recorded and an alternative block area e in which an alternative block (alternative area) is prepared, and the area cannot be recorded or reproduced by the user. There is. The substitute block is a block used as a substitute for a defective block (defective area) in the user area b during manufacturing or recording.

In the management information area c (, d), as shown in FIG. 7, new and old defect management information (error management information) f for every 4 Kbytes is recorded.
That is, the defect management information in which the defect replacement area information at the time of recording is updated is recorded. Here, two pieces of the same information are written to improve the reliability of the defect management information.

As shown in FIG. 8, the defect management information f includes initial defect replacement area information g and recording defect replacement area information h. The initial defect replacement area information g is information for designating a replacement block (substitution area) for a defect at the time of manufacture, that is, a block (defect area) that cannot be recorded at the time of manufacture. For example, a pre-header is read. ., A substitute block number (substitute area) for a block number (defective area) in which the pre-header cannot be read.

The recording defect replacement area information h specifies a replacement block (replacement area) for a defect found during recording, that is, a block (defect area) that cannot be correctly recorded at the time of recording. This is information. For example, the recorded information is played back (after read-after-write), and it is judged whether or not it was correctly written by whether it was played correctly. Block number (alternative area)
Is stored. That is, it is information for designating writing to another area for an area that cannot be understood unless it is actually written.

Below the optical disc 1 is shown in FIGS.
As shown in FIG. 3, an optical head 5 for recording and reproducing information is provided. The optical head 5 includes a movable portion 6 and a fixed portion 8 of the direct current linear motor 3 which is a movable portion 6.
Is fixed to the optical disk 1 by the movement of the movable part 6.
Is linearly moved in the radial direction, that is, in the directions a and b in the figure. 9 is a detector for detecting the position of the movable part 6,
These are movable parts 6 by a so-called superimposed grid detection method.
That is, two types of detection signals having different phases (the phase relationship changes depending on the direction) are output according to the movement amount of the optical head 5.

On the other hand, the optical head 5 fixed to the linear motor 3 includes a semiconductor laser, a collimator lens, a beam splitter, an objective lens, a focus drive coil for driving the objective lens in the direction of the optical disc 1, and an objective lens having a radius of the optical disc 1. Direction driving coil, a focusing detector having a pair of photo detectors for detecting whether or not the laser beam light is focused on the optical disc 1, and a pair of photo detectors for detecting whether or not the information track is being tracked. And a tracking detector having

A detection signal is output from each photodetector to a corresponding processing circuit, and a predetermined voltage is applied to each drive coil and semiconductor laser from each drive circuit.

The control circuit 20 controls the entire device according to a signal from an external device, that is, a host computer (not shown). The linear motor drive circuit 14 uses the target position signal and the detector 9 supplied from the control circuit 20.
The linear motor 3 is driven according to the output signal of.

On the other hand, the rotary motor drive circuit 10
The speed is determined according to the rotation clock from the control circuit 20, and the speed is controlled to the speed set by the control circuit 20. The focus servo circuit 11 adjusts the focus of the objective lens in the optical head 5 according to the detection signal from the detector in the optical head 5, and the focus pull-in circuit 1
6 makes it possible to accurately perform focusing when changing from a state in which focusing is not working to a state in which it is working.

The tracking servo circuit 12 sets the objective lens of the optical disk 1 so that the light beam emitted through the objective lens in the optical head 5 is at the center of the track in response to the detection signal from the detector in the optical head 5. It can be moved in the radial direction. Further, the tracking servo circuit 12 can temporarily stop the servo operation and generate a track jump drive pulse in accordance with the track jump pulse from the track jump pulse generation circuit 17 to move the objective lens and move the beam light for one track. It is possible.

The pit signal waveform shaping circuit 13 shapes the waveform of the detection signal from the detector in the optical head 5. The binarization circuit 18 binarizes the waveform shaping signal from the pit signal waveform shaping circuit 13.

The reference clock generator 41 generates a reference clock. The variable clock generation circuit 19
The reference clock supplied from the reference clock generator 41 is a clock signal (reference signal) having a frequency (time width) according to the clock speed information supplied from the control circuit 20.
Is to occur. That is, as the position of the optical head 5 moves outward of the optical disk 1, the frequency of the clock signal becomes higher (the time width becomes shorter).

The reproduction synchronous clock extraction circuit 23
When a control signal from the control circuit 20 is supplied,
According to the clock signal supplied from the variable clock generation circuit 19, the reproduction synchronous clock recorded first in the block header A of each block is extracted from the data supplied from the binarization circuit 18. .

The demodulation circuit 22 responds to the clock signal from the variable clock generation circuit 19 by following the reproduction synchronization clock from the reproduction synchronization clock extraction circuit 23.
The data supplied from the digitization circuit 18 is demodulated. The serial-parallel conversion circuit 25 converts the reproduction signal supplied from the demodulation circuit 22 from serial data into parallel data according to the clock signal from the variable clock generation circuit 19.

The header discrimination circuit 26 is the demodulation circuit 22.
The reproduction signal supplied from the variable clock generation circuit 1
Only the header data is discriminated according to the clock signal from 9. The recording / reproducing header register 29 stores the accessed header data supplied from the control circuit 20.

The header comparator 28 compares the header data stored in the recording / reproducing header register 29 with the header data supplied from the header discrimination circuit 26, and outputs a coincidence signal when they coincide. It is a thing.

The parallel-serial conversion circuit 24
Is for converting a reproduction signal supplied from a recording / reproducing switching circuit 27, which will be described later, from parallel data to serial data in accordance with a clock signal from the variable clock generating circuit 19.

The modulation circuit 21 modulates the data supplied from the parallel-serial conversion circuit 24 according to the clock signal from the variable clock generation circuit 19. The laser drive circuit 15 records data by drivingly controlling a semiconductor laser (not shown) in the optical head 5 according to the modulation signal supplied from the modulation circuit 21.

The recording / reproducing switching circuit 27 records the reproduction data following the header data when the coincidence signal is supplied from the header comparator 28 in response to the reproduction control signal from the control circuit 20, that is, the recording / reproducing data buffer 30. Is output to.

The recording / reproducing switching circuit 27
Is for outputting recording data following the header data supplied from the recording / reproducing data buffer 30 to the parallel / serial conversion circuit 24 in response to a recording control signal from the control circuit 20.

The recording / reproducing data buffer 30 stores the reproducing data from the recording / reproducing switching circuit 27 and the recording data from the recording / reproducing data transfer circuit 32. The error correction code adding / error correcting circuit 31 adds an error correction code by the Reed-Solomon method to the recording data stored in the recording / reproducing data buffer 30 and also reproduces the reproducing data stored in the recording / reproducing data buffer 30. The error is corrected.

The above-mentioned error correction code addition / error correction circuit 3
In No. 1, in the case of read-after-write at the time of recording, the weak correction capability is used for correction to perform a strict check, and at the time of reproduction, the normal error correction capability is used for correction.

The weak correction capability is that the size of an error that can be corrected is smaller than that during reproduction. The above-mentioned error correction code addition / error correction circuit 31
Since the correction method using the cross interleave in (1) is described in detail in Japanese Patent Application No. 59-15501, it will be omitted here.

The recording / reproducing data transfer circuit 32 transfers the reproducing data supplied from the recording / reproducing data buffer 30 to the host computer (not shown) via the external interface circuit 33, and the host computer external interface circuit. The recording data supplied via 33 is output to the recording / reproducing data buffer 30.

Further, as shown in FIG. 9, the ROM 42 as a storage circuit has clock speed information of the optical disk 1 for every 256 tracks, the number of sectors of one block at this clock speed, and the first of 256 tracks at the above speed. A conversion table in which the block number and the start sector of the block correspond to each other is stored. Further, when the control circuit 20 is supplied from the host computer via the external interface circuit 33 with the block number of the recording or reproducing position, that is, the position to be accessed, the ROM 42 determines the access position corresponding to the block number. Read out, and the linear motor 3 and the optical head 5 make access while the frequency of the clock signal is constant. Since the clock speed information and the reading (calculation) of the access position are described in detail in Japanese Patent Application No. 59-32825, they are omitted here.

The control circuit 20 also stores the latest defect management information read from the management information area c (, d) of the optical disc 1 in the memory buffer 43 when the optical disc 1 is set in the apparatus (when it is opened). Also, when the optical disc 1 is removed from the apparatus (when closed) or when the defect management information is updated, the defect management information stored in the memory buffer 43 is used as the latest information to manage the optical disc 1 in the management information area c. , D in the first unrecorded area.

The memory buffer 43 has a capacity which is an integral multiple of the minimum recording unit of data, for example, 4 which is the same as one block.
The size is K bytes, and as shown in FIG. 10, initial defect replacement area information as defect management information and recording defect replacement area information are stored.

Next, the operation of this structure will be described. First, the optical disc 1 is set in this device (at the time of opening). Then, the control circuit 20 firstly sets the motor 4
To rotate the optical disk 1 at a constant speed. Then, the control circuit 20 reads the clock speed information and the access position, that is, the track number and the start sector number according to the block number corresponding to the management information area c from the ROM 42.

As a result, the control circuit 20 outputs the clock speed information to the variable clock generation circuit 19. Then, the variable clock generation circuit 19 causes the reference clock generator 4 to
A clock signal having a frequency (time width) according to the clock speed information supplied from the control circuit 20 is generated using the reference clock from No. 1, and the modulation circuit 21, the demodulation circuit 22, the reproduction synchronous clock extraction circuit 23, the parallel circuit -Supply to the serial conversion circuit 24, the serial-parallel conversion circuit 25, and the header discrimination circuit 26.

The control circuit 20 converts the track number into a scale value according to the track number, and drives the linear motor driver 14 until the scale value and the position detected by the output of the position detector 9 match. By doing so, the optical head 5 is moved. Then, when the movement of the optical head 5 is completed, the detection signal from the detector in the optical head 5 is shaped by the waveform shaping circuit 13,
It is binarized by the binarization circuit 18 and supplied to the demodulation circuit 22 and the reproduction synchronous clock extraction circuit 23. Then, the reproduction synchronization clock extraction circuit 23 extracts the reproduction synchronization clock recorded first in the block header A from the supplied data and outputs it to the demodulation circuit 22.

As a result, the demodulation circuit 22 demodulates the reproduction synchronization clock and the read signal subsequently supplied from the binarization circuit 18 to the recording / reproduction switching circuit 27 via the serial-parallel conversion circuit 25. It outputs and supplies to the header discrimination circuit 26. The header discriminating circuit 26 discriminates only the header data to discriminate the control circuit 20.
And to the header comparator 28.

As a result, the control circuit 20 determines the track to which the optical head 5 corresponds from the header data,
Compare this track with the target track. As a result of this comparison, the control circuit 20 moves the optical head 5 again by the linear motor 3 when it is separated by several tens of tracks or more, and when it is within several tens of tracks, the optical head 5 is moved by the number of corresponding tracks by the track jump. Moving.

When the optical head 5 corresponds to the target track, the header discriminating circuit 26 discriminates only the header data and outputs it to the header comparator 28. At this time,
The header data of the target block, that is, the block corresponding to the management information area c is stored in the header register 29 in advance by the control circuit 20, and the header data of the header register 29 is supplied to the header comparator 28. Thus, the header comparator 28 outputs a match signal to the recording / reproducing switching circuit 27 when the header data match. Then, the recording / reproduction switching circuit 27 outputs the reproduction data supplied following the header data to the recording / reproduction data buffer 30.

The reproduction data of the recording / reproduction data buffer 30 is error-corrected by the error correction code addition / error correction circuit 31 and then supplied to the control circuit 20. As a result, the defect management information f for every 4 k bytes in the management information areas c and d is sequentially supplied to the control circuit 20.

Then, the control circuit 20 reads the latest defect management information f from the management information areas c and d and stores it in the memory buffer 43. In reading the latest defect management information f, the defect management information f in front of five consecutive free areas is read as the latest information. Further, the latest defect management information f read from the management information areas c and d is compared to confirm the data.

Next, in the state where the latest defect management information is stored in the memory buffer 43 as described above, the block number for recording (accessing) from the host computer (not shown) via the external interface circuit 33. Is supplied to the control circuit 20. Then
The control circuit 20 indicates that the block number is the memory buffer 4
It is checked whether it is included in the initial defect replacement area information g of No. 3, that is, whether it is the initial defect area. As a result of this check, if the area is not the initial defect area, the block is recorded as a block number from the host computer. Further, as a result of the above check, in the case of the initial defect area, the alternative block read by the initial defect alternative area information g is set as a block to be recorded (first alternative processing means).

Then, the control circuit 20 uses the conversion table of the ROM 42 to calculate the track, start sector and clock speed information of the target block (block number from the host computer or alternative block). Then, the control circuit 20 outputs the clock speed information to the variable clock generation circuit 19. As a result, the variable clock generation circuit 19 uses the reference clock from the reference clock generator 41 to generate a clock signal having a frequency according to the clock speed information supplied from the control circuit 20, and the modulation circuit 21 and the demodulation circuit 22. , The reproduction synchronization clock extraction circuit 23, the parallel-serial conversion circuit 24, the serial-parallel conversion circuit 25, and the header discrimination circuit 26.

Further, according to the track number, the control circuit 20 operates similarly to the case of accessing the above-mentioned alternative processing area, and makes the beam light of the optical head 5 correspond to the track of the target block.

At this time, the recording data is recorded / reproduced from the host computer via the external interface circuit 33 and the recording / reproduction data transfer circuit 32.
Is stored in

When the match signal of the block header of the target block is supplied from the header comparator 28 to the recording / reproducing switching circuit 27, the recording / reproducing switching circuit 27 causes the recording data in the recording / reproducing data buffer 30 to be parallel-serial. It is supplied to the conversion circuit 24. The recording data converted into serial data by the parallel-serial conversion circuit 24 is modulated by the modulation circuit 21,
It is supplied to the laser drive circuit 15. As a result, the laser drive circuit 15 drives the semiconductor laser (not shown) in the optical head 5 in accordance with the supplied modulation signal to record data.

After this recording, read-after-write is performed.
That is, the block on which the recording has been performed is read. That is, the control circuit 20 causes the laser beam of the optical head 5 to correspond to the track of the target block, as in the case of the above recording.

When the match signal of the block header of the target block is supplied from the header comparator 28 to the recording / reproducing switching circuit 27, the recording / reproducing switching circuit 27 records the reproduced data from the serial-parallel conversion circuit 25. It is supplied to the reproduction data buffer 30. The reproduction data stored in the recording / reproduction data buffer 30 is subjected to error correction by the weak correction capability in the error correction code addition / error correction circuit 31. As a result, if no correction error (defect) occurs, the control circuit 20 ends the recording process.

Further, as a result of the above, when a correction error (defect) occurs, the control circuit 20 determines the alternative block to be used next based on the defect alternative area information at the time of recording, and rewrites the recording data in the alternative block. After this recording is performed, if read-after-write is performed in the same manner as described above, and if no correction error (defect) occurs, the control circuit 20 uses the substitute block corresponding to the defective block to record defective substitute area information in the memory buffer 43. Is updated and the information in the memory buffer 43 is recorded in the management information areas c and d. When a correction error (defect) occurs, the control circuit 20 records the recording data again in another alternative block, and then operates in the same manner as above (second alternative processing means).

As described above, when the defect is found a plurality of times in the check of the recording data, the defect management information can be recorded a plurality of times.

Also, when data is recorded in another block, the same operation as described above can be performed. In this case, data recording is performed in a state where the frequency of the clock signal is increased as the block position is located on the outer peripheral side.

The operation during recording is as shown in FIG.

A host computer (not shown)
It is assumed that a block number for reproduction (access) is supplied from the external interface circuit 33 to the control circuit 20.

Then, the control circuit 20 checks whether the block number is included in the initial defect replacement area information g of the memory buffer 43, that is, whether it is the initial defect area. If the result of this check is that the block is not an initial defect area, the block number from the host computer is set as a block to be reproduced. In addition, as a result of the above check, in the case of the initial defective area, the substitute block read based on the initial defect alternative area information g is set as a block to be reproduced (third alternative processing means).

Then, as in the case of the above recording, the clock speed information corresponding to the block (the block number from the host computer or the alternative block) is read out, and the clock signal having the frequency corresponding to the clock speed information is modulated. The signal is supplied to the circuit 21, the demodulation circuit 22, the reproduction synchronous clock extraction circuit 23, the parallel-serial conversion circuit 24, the serial-parallel conversion circuit 25, and the header discrimination circuit 26.

Further, as in the case of the above recording, the laser beam of the optical head 5 is made to correspond to the track of the target block.

When the match signal of the block header of the target block is supplied from the header comparator 28 to the recording / reproducing switching circuit 27, the recording / reproducing switching circuit 27 records the reproduced data from the serial-parallel conversion circuit 25. It is supplied to the reproduction data buffer 30. The reproduction data stored in the recording / reproduction data buffer 30 is error-corrected by the error correction code addition / error correction circuit 31 with a normal error correction capability. As a result, if no correction error (defect) occurs, the control circuit 20 transfers the reproduction data to the host computer via the recording / reproduction data transfer circuit 33 and the external interface circuit 33, and ends the reproduction processing.

Further, as a result of the above, when a correction error (defect) occurs, the control circuit 20 reads the replacement block corresponding to the defective block from the recording defect replacement area information in the memory buffer 43, and records the replacement block. The data is corrected and reproduced with the ordinary error correction capability as described above (third alternative processing means).

Then, the control circuit 20 transfers the reproduction data from the alternative block to the host computer via the recording / reproduction data transfer circuit 33 and the external interface circuit 33, and ends the reproduction processing.

Also, when the data of another block is reproduced, the same operation as described above can be performed. In this case, data is reproduced in a state where the frequency of the clock signal is increased as the block position is located on the outer peripheral side.

The operation during the reproduction is as shown in FIG.

When the optical disk 1 is removed (closed) or when the defect management information is updated, the control circuit 20 uses the defect management information stored in the memory buffer 43 as the latest information. The data is recorded in the first unrecorded area of the areas c and d.

As described above, the optical disk device itself can
In order to improve the reliability of the recorded data, it is possible to perform alternative processing for defective areas at the beginning or at the time of recording, so the processing time at the time of recording and reproduction can be shortened and the host computer can be replaced. By releasing the processing, it is possible to reduce the processing.

In the data defect check, the correction capability is weakened at the time of recording (1 byte correction), and a strict check is performed.
Improve reliability during recording. Then, at the time of reproduction, the correction capability of the normal level (3 byte correction) is checked, and only the data that cannot be reproduced is reproduced with the data subjected to the substitution process. As a result, even if the weak correction ability becomes defective,
For areas that can be corrected with normal level correction ability,
Do not perform substitution processing. For this reason, the number of accesses required for the alternative process can be reduced, and the access speed can be improved. Therefore, the efficiency of the processing can be improved without losing the reliability.

Further, at the time of recording and reproducing data, normally, the initial defect replacement area information stored in the memory buffer is referred to, and the replacement processing is performed only for the corresponding area. Further, only when a defective area is found by checking the read-after-write at the time of data recording or when an area that cannot be reproduced at the time of data reproduction occurs, a substitution process for a defect is performed using the defect substitution area information part at the time of recording. Therefore, it is possible to distinguish between the alternative processing procedure for the initial defect and the alternative processing procedure for the recording defect, and set them to suit each defect state (defect characteristics and characteristics).
The alternative processing can function efficiently.

Further, the recording defect replacement area information in the memory buffer is updated every time the replacement process at the time of recording is performed, and the initial defect replacement area information and the recording defect in the memory buffer are updated every time the optical disc is closed. Defect management information of 4 Kbytes including alternative area information is recorded in the management information area in the alternative processing area of the optical disc. In this case, since the initial defect replacement area information and the latest recording defect replacement area information are combined, each information can be recorded on the optical disc without special processing.

Since the defect management information is placed under the control of the optical disk device, it is possible to prevent the host computer from accidentally destroying the defect management information. Furthermore, since the defect management can be entirely performed by the optical disc device, compatibility with other optical disc recording formats can be achieved.

Further, since the replacement area information as the management information for the initial defect and the recording defect is one unit, the speed of the internal processing can be improved.

In the above embodiment, the case where the alternative process is performed for the defective area has been described. However, the present invention is not limited to this, and whether or not the alternative process is performed can be selected by a command from the host computer. good. In this case, compatibility with the conventional device can be maintained. Further, although the case where the optical disk is used as the information recording medium has been described, the present invention is not limited to this, and a magnetic disk, a floppy disk, a laser card, or the like may be used.

[0077]

As described above in detail, according to the present invention, the processing time at the time of recording and reproducing information can be shortened, and the processing can be reduced by releasing the host computer from the alternative processing. It is possible to provide an information processing device capable of performing the above.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a configuration of an optical disc device of the present invention.

FIG. 2 is a diagram schematically showing a configuration of an optical disk device of the present invention.

FIG. 3 is a plan view showing the configuration of an optical disc.

FIG. 4 is a plan view showing the configuration of an optical disc.

FIG. 5 is a plan view for explaining an alternative processing area and a user area.

FIG. 6 is a plan view for explaining a configuration of an alternative processing area.

FIG. 7 is a diagram showing a recording example of a management information area.

FIG. 8 is a diagram for explaining an example of recording defect management information.

FIG. 9 is a diagram showing an example of storage of a conversion table.

FIG. 10 is a diagram for explaining a storage example of a memory buffer.

FIG. 11 is a flowchart for explaining a recording operation.

FIG. 12 is a flowchart for explaining a reproduction operation.

[Explanation of symbols]

 1 ... Optical disc (information recording medium) 1a ... Recording film a ... Alternate processing area (alternate processing recording area) b ... User area (user recording area) c, d ... Management information area e ... Alternate block area f ... Defect Management information g ... Initial defect replacement area information h ... Recording defect replacement area information 20 ... Control circuit 31 ... Error correction code addition / error correction circuit 43 ... Memory buffer (storage means)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location G11B 20/18 552 9558-5D G11B 20/18 552A 572 9558-5D 572F 9558-5D 572C

Claims (1)

[Claims] 1. An information processing apparatus for recording or reproducing information on an information recording medium in which defect management information indicating an alternative area for a defective area is stored, the alternative for the defect read from the information recording medium. Storage means for storing defect management information indicating an area, and when recording information, it is judged whether or not the area to be recorded is a defect area based on the defect management information in the storage means. First alternative processing means for recording information in the alternative area by means of, and after recording the information, the recorded information is read out, and the information is reproduced by performing error correction with a predetermined error correction capability. When the data cannot be reproduced correctly, the recorded area is used as a defective area, and information is recorded in another area, and it is separated from the defective area. Secondly, the correspondence with the storage area is stored in the storage means as defect management information.
When the information is reproduced, it is determined whether the area to be reproduced is a defect area based on the defect management information in the storage unit. If the area is a defect area, the information is reproduced from the alternative area by the defect management information. And a third alternative processing means for reproducing information by performing error correction on the read information with a capacity higher than the predetermined error correction capacity. Information processing equipment.