JPS6358671A - Information processor - Google Patents

Abstract

PURPOSE:To increase the reading speed with an information processor by enabling an information processor to perform the substitute processing to a defective area and setting the capacity of a memory means for defect control information at an integer-fold value of the minimum recording unit of the recording information. CONSTITUTION:The new/old defect processing information (f) are recorded every 4k bytes in a control information area of an optical disk. The information (f) include the initial defect substitute area information (g) and a recording mode defect substitute area information (h). The data on the information (f) is recorded in the minimum recording unit (4k bytes) and therefore the information (f) is completely obtained just by reading out the minimum unit. Thus the information reading speed is increased. When a block number is supplied from a host in a state where the latest information (f) is stored in a memory buffer, the substitute block read out by the information (g) is defined as a block to be recorded as long as said block number is included in the information (g). The recorded information is reproduced and this record data is recorded again to another substitute block if a defect occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an information processing device such as an optical disk device that records or reproduces information on or from an optical disk.

(Prior art) In recent years, image information such as documents, which is generated in large quantities, is charged and converted by two-dimensional optical scanning, and this photoelectrically converted image information is recorded on an image recording device, or it is used as needed. Recently, optical disks have been used as image recording devices in image information file devices that can search, reproduce, and reproduce and output as hard copies or soft copies.

Conventionally, such optical disk devices use an optical disk that records information in a spiral manner, and information is recorded or reproduced using an optical head that moves linearly in the radial direction of the optical disk using a linear motor. It has become.

In such an optical disk device, a defective area (block) is determined by reading a block header during manufacturing, and the data is recorded on the disk.

As a result, recording is performed while skipping the defective area.

Also, when recording, if the host computer performs read-after-write and corrections are made but reading cannot be performed, the area (block) that cannot be read is determined to be a defective area, and another block is used as a substitute block. The information to be recorded in the defective area is recorded in this alternative block. Defect management information corresponding to defective areas and replacement areas during manufacturing and recording is stored in separate memory buffers.

However, in the above-mentioned optical disk device, the host computer manages the defective areas and replacement areas during recording, which has the disadvantage that the processing takes time and the host computer's processing becomes complicated. there were.

Furthermore, since the memory buffer capacity of the defect management information and the unit of recorded information do not match, processing of the defect management information becomes complicated.

(Problems to be Solved by the Invention) As mentioned above, it is possible to eliminate the drawbacks that the processing at the time of recording takes time, the processing of the host computer becomes complicated, and the processing of defect management information also becomes complicated. This is an information processing device that can shorten the processing time when recording information, reduce processing by freeing the host computer from alternative processing, and facilitate the processing of defect management information. It is about providing.

[Structure of the Invention] (Means for Solving the Problems) The information processing device of the present invention includes an information recording medium in which defect management information indicating an alternative area for a defective area at the time of manufacturing or information recording is recorded. On the other hand, in a device that records or reproduces information, it has a capacity that is an integral multiple of the minimum recording unit of the recorded information, and has a replacement area for the defective area at the time of manufacturing or recording of information read from the information recording medium. storage means for storing defect management information indicated;
When recording or reproducing information, it is determined whether the area to be accessed is a defective area based on the defective alternative area information of the storage means, and if it is a defective area, the information is recorded or reproduced in the alternative area based on the defect management information. After the first alternative processing means and the information are recorded, the information is reproduced by reading the recorded information and performing error correction, and when the information cannot be reproduced correctly, the recorded area is separated as a defective area. a second area for recording information on the area, and storing the correspondence between the defective area and another recording area in the storage means as defect management information;
It consists of alternative processing means.

(Function) This invention enables the information processing device itself to perform alternative processing for defective areas at the initial stage or at the time of recording information, and to reduce the capacity of the storage means for storing defect management information to an integer of the minimum recording unit of recorded information. This is to double the amount.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 shows a schematic configuration of an information processing device, ie, an optical disk device, according to the present invention. In other words, an optical disc (
The information recording medium 1 has a spiral or concentric information storage section with a constant pitch in the radial direction, and is rotationally driven by a motor 4K.

As shown in FIG. 3, the optical disc 1 has a donut-shaped metal coating layer 1a made of tellurium or bismuth coated on the surface of a circular substrate made of glass or plastic, for example. A notch, that is, a reference position mark 11, is provided near the center of the metal covering Ill.

In addition, as shown in FIG. 3, the optical disc 1 has a reference position mark 11 of 2.
It is divided into 6 sectors. On the optical disk 1, variable length information is recorded over a plurality of blocks, and 300,000 blocks are arranged in 36,000 t-racks on the optical disk 1.

The number of sectors in one block on the optical disc 1 is, for example, 40 sectors on the inner side and 20 sectors on the outer side. At the start position of the block, a block header A consisting of a block number, track number, etc. is recorded, for example, when the optical disc 1 is manufactured. Furthermore, if 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.

Further, 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, 10oO
An alternative processing area (alternative processing recording area) a for tracks is provided, and in addition to this, a user area (user recording area) b is provided as a recording area used by the user.

The above alternative processing area a is a 4K
A management information area (primary) cl in which new and old defect management information f for each byte is recorded, a management information area (sub) d in which the same information as this management information area C is recorded, and an alternative block (alternative area) This is a special area that cannot be recorded or reproduced by the user (by the host computer). 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.

As shown in FIG. 7, the management information area C, d) records new and old defect management information (error management information) f every 4 Kbytes. That is, defect management information with updated defect replacement area information at the time of recording is recorded. Here, the same information is written twice, improving the reliability of the defect management information.

The defect management information f, as shown in FIG. 8, consists of initial defect replacement area information 9 and recording defect replacement area information. The above-mentioned initial defect replacement area information port refers to defects during manufacturing, that is, blocks that cannot be recorded during manufacturing (
This is information that specifies an alternative block (alternative area) for a defective area), for example, by reading a block header and storing an alternative block number (alternative area) for a block number (defective area) whose block header cannot be read. This is what we are doing.

The above-mentioned recording defect replacement area information is information that specifies a replacement block (alternative area) for a defect found during recording, that is, a block (defect area) that cannot be recorded correctly during recording. (for example, after reading after writing without reproducing the recorded information), it is determined whether recording was performed correctly based on whether or not the recorded information was reproduced correctly, and an alternative block number (defective area) for the block number (defective area) that cannot be recorded correctly is determined. (alternative area). In other words, it is information that specifies writing to an area other than the area that cannot be known until actually writing.

Here, when recording the defect management information f on the optical disc 1,
The latest information that manages everything from the earliest defects to the latest defects is always recorded. Furthermore, since the data recording in the defect management information of the optical disc 1 is in the minimum recording unit (4K bytes), by reading out the minimum unit, all the information in the defect management information f can be obtained, improving the reading speed. It looks like this.

As shown in FIG. 2, an optical head 5 for recording and reproducing information is provided below the optical disc 1. As shown in FIG. The optical head 5 is fixed to a movable part 6 of a DC linear motor 3, which is composed of a movable part 6 and a fixed part 8, and is linearly moved in the radial direction of the optical disc 1, that is, in the directions a and b in the figure, by the movement of the movable part 6. will be moved to Reference numeral 9 denotes a detector for detecting the position of the movable part 6, and these detect two types of different phases according to the amount of movement of the movable part 6, that is, the optical head 5 (this phase relationship is outputs a detection signal (changes depending on direction).

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 that drives the objective lens in the direction of the optical disc 1, and a focus drive coil that drives the objective lens in the radial direction of the optical disc 1. A tracking drive coil for detecting a laser beam, a focus detector having a pair of photodetectors for detecting whether the laser beam is focused on the optical disk 1, and a pair of photodetectors for detecting whether the laser beam is tracking on an information track. It consists of a tracking detector.

Each photodetector outputs a detection signal to a corresponding processing circuit, and each drive circuit applies a predetermined voltage to each drive coil and semiconductor laser.

The control circuit 20 controls the entire apparatus in response to signals from an external device, that is, a host computer (not shown). The linear motor drive circuit 14 includes the control circuit 2
The linear motor 3 is driven in accordance with the target position signal supplied from the sensor 0 and the output signal of the detector 9.

On the other hand, the rotary motor drive circuit 10 determines the speed according to the rotation clock from the motor 4, and controls the speed to the set speed from the control circuit 20. The focus servo circuit 11 adjusts the focus of the objective lens in the optical head 5 in accordance with the detection signal from the detector in the optical head 5, and the focus servo circuit 11 adjusts the focus of the objective lens in the optical head 5. When changing from a state to a movable state, force tsusing is performed accurately.

The tracking servo circuit 12 moves the objective lens in the radial direction of the optical disk 1 in response to a detection signal from the detector in the optical head 5 so that the beam of light emitted through the objective lens in the optical head 5 is centered on the track. It is something that allows you to move.

Further, the tracking servo circuit 12 can temporarily stop the servo operation and generate a track jump drive pulse in response to a track jump pulse from the track jump pulse generation circuit 17 to move the objective lens and move the beam by one track. It is possible.

Further, the bit signal waveform shaping circuit 13 shapes the waveform of the detection signal from the detector in the optical head 5. The binarization circuit 18 is the bit signal waveform shaping circuit 13
This is to binarize the waveform shaped signal from.

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

Furthermore, when the regenerated synchronization clock extraction circuit 23 is supplied with the control signal from the control circuit 20, the clock is supplied from one of the variable clock generation circuits, or from the binarization circuit 18 in response to a lock signal. The reproduction synchronization clock recorded first in the block header of each block is extracted from the data.

The 11 circuit 22 generates the binarization circuit 18 following the regenerated synchronization clock from the regeneration synchronization clock extraction circuit 23 in accordance with the clock signal from the variable clock generation circuit 19.
It demodulates the data supplied from the The serial-parallel conversion circuit 25 converts the reproduced signal supplied from the demodulation circuit 22 from serial data to parallel data in accordance with the clock signal from the variable clock generation circuit 19.

The header discrimination circuit 26 discriminates only header data from the reproduced signal supplied from the demodulation circuit 22 in accordance with the clock signal from the variable clock generation circuit 19. The recording/reproducing ladder register 29 is connected to the control circuit 2.
The header data to be accessed supplied from o is stored.

The header comparator 28 is connected to the recording/reproducing header register 29.
The header data stored in the header data and the header data supplied from the header discrimination circuit 26 are compared to see if they match, and -
It outputs a dispersive, coincidence signal.

Further, the parallel-serial conversion circuit 24 converts a reproduction signal supplied from a recording/reproduction switching circuit 27 (described later) from parallel data to serial data in accordance with a clock signal from the variable clock generation circuit 19.

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

The recording/reproduction switching circuit 27 outputs the reproduction data following the header data to the recording/reproduction data buffer 30 when the coincidence signal is supplied from the header comparator 28 in response to the reproduction control signal from the control circuit 20 . It is something.

Further, the recording/reproduction switching circuit 27 outputs recording data following the header data supplied from the recording/reproduction data buffer 30 to the parallel/serial conversion circuit 24K in response to a recording control signal from the control circuit 20. It is.

The recording/reproduction data buffer 30 stores reproduction data from the recording/reproduction switching circuit 27 and also stores recording data from the recording/reproduction data transfer circuit 32. The error correction code addition/error correction circuit 31 is
An error correction code based on the Reed-Solomon method, for example, is added to the recording data stored in the recording/reproduction data buffer 30, and errors in the reproduction data stored in the recording/reproduction data buffer 30 are corrected.

The above-mentioned error correction code addition/error correction circuit 31 performs a strict check by performing correction with weak correction ability in the case of read-after-write during recording, and performs correction with normal error correction ability during playback. It has become.

The above-mentioned weak correction ability means that the magnitude of errors that can be corrected is smaller than that during normal reproduction. Regarding the correction method using cross interleaving in the above error correction code addition/error correction circuit 31, the patent application No. 5
9-15501, the details are omitted here.

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

Further, as shown in FIG. 9, the ROM 42 as a storage circuit stores clock speed information of the optical disk 1 for each 256 tracks, the number of sectors in one block at this clock speed, and the first block in the 256 tracks at the above speed. A conversion table is stored in which the number of the block corresponds to the starting sector of the block.

Further, when the control circuit 20 is supplied with a block number of a recording or reproducing position, that is, an access position, which is supplied from the host computer via the external interface circuit 33, the control circuit 20 sets the access position in the ROM 42 according to the block number. , and access is performed by the linear motor 3 and optical head 5 while keeping the frequency of the clock signal constant. The above-mentioned clock speed information and access position readout calculation) are explained in detail in Japanese Patent Application No. 59-32825, and therefore will not be repeated here.

Further, the control circuit 20 controls the management information area C of the optical disc 1 when setting the optical disc 1 to the device (in the oven).
The latest defect management information read from (, d) is stored in the memory buffer 43, and when the optical disc 1 is removed from the device (when closed) or when the defect management information is updated, the memory buffer 43 is stored. The stored defect management information is recorded in the first unrecorded area of the management information areas c and d of the optical disc 1 as the latest information.

The memory buffer 43 has a capacity that is an integral multiple of the minimum recording unit of data, for example, 4K bytes, which is the same as one block, and as shown in FIG. 1, initial defect replacement area information as defect management information and recording time are stored. Defect replacement area information is stored.

Next, the operation in such a configuration will be explained. First, set optical disc 1 to this gi@ (when in oven)
. Then, the control circuit 20 first drives the motor 4,
The optical disc 1 is rotated at a constant speed. Next, the control circuit 20 reads the clock speed information and the access position, that is, the track number and start sector number, corresponding to the block number corresponding to the management information area C from the ROM 42.

Thereby, the control circuit 20 outputs the clock speed information to the variable clock generation circuit 19. Then, the variable b
The clock generation circuit 19 uses the reference clock from the reference clock generator 41 to generate a clock signal with a frequency (time width) according to the clock speed information supplied from the control circuit 20, , a reproduced synchronization clock extraction circuit 23, a parallel-serial conversion circuit 24, a serial-parallel conversion circuit 25, and a header discrimination circuit 26.

Also, based on the track number, the control circuit 2° converts the track number into a scale value, and drives the linear motor driver 14 until this scale value matches the position detected by the output of the position detector 9. The optical head 5 is thereby moved. Next, when the movement of the optical head 5 is completed, the detection signal from the detector in the optical head 5 is waveform-shaped by the waveform shaping circuit 13 and then sent to the binarization circuit 1.
The signal is binarized at step 8 and supplied to the demodulation circuit 22 and the reproduction synchronization clock extraction circuit 23. Then, the reproduction synchronization clock extraction circuit 23 extracts the block header A from the supplied data.
The first recorded reproduction synchronization clock is extracted and output to the demodulation circuit 22.

As a result, the demodulation circuit 22 converts the reproduced synchronization clock and the read signal subsequently supplied from the binarization circuit 18 into I/O.
Im, is output to the recording/reproduction switching circuit 27 via the serial-parallel conversion circuit 25, and is also supplied to the header discrimination circuit 26. Then, the header discrimination circuit 26
discriminates only the header data and outputs it to the control circuit 20 and the header comparator 28.

Thereby, the control circuit 20 determines the track to which the optical head 5 corresponds from the header data, and compares this track with the target track. As a result of this comparison, 1I
If the distance is several tens of tracks or more, the circuit 20 moves the optical head 5 again by the linear motor 3, and if the distance is within several tens of tracks, the optical head 5 is moved by the corresponding number of tracks by a track jump.

Then, when the optical head 5 corresponds to the target track,
The header discrimination circuit 26 discriminates only header data and outputs it to the header comparator 28. At this time, the header data of the block corresponding to the target management information area C is stored in advance in two header registers by the control circuit 20, and the header data of the two header registers is supplied to the header comparator 28. Thereby, the header comparator 28 outputs a match signal to the recording/reproduction switching circuit 27 when the header data match. Then, the recording/reproduction switching circuit 27 transfers the reproduction data supplied following the header data to the recording/reproduction data buffer 3.
Output to 0.

The reproduced data in the recording/reproducing data buffer 30 is subjected to error correction 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 each 4K byte of 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 area C1d and stores it in the memory buffer 43. The latest defect management information f is read out by reading the defect management information f located before five consecutive free areas as the latest information. Furthermore, the data is confirmed by comparing the latest defect management information f read from the management information areas c and d.

Next, with the latest defect management information stored in the memory buffer 43 as described above, a host computer (not shown) sends it to the external interface circuit 33.
Assume that a block number to be recorded (accessed) is supplied to the control circuit 20 via the block number. Then, the control circuit 20
Is that block number a memory buffer? It is checked whether the area is included in the initial defect replacement area information Q of No. 43, that is, whether it is an initial defect area. As a result of this check, if the area is not an initial defective area, the block number from the host computer is recorded as the block. Further, if the result of the above check is that the area is an initial defective area, the alternative block read out based on the initial defect alternative area information Q is set as the block to be written B (first alternative processing means).

Then, the control circuit 20 uses the conversion table in 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 plate 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 with a frequency corresponding to the clock speed information supplied from the control circuit 20, and
1. The signal is supplied to the demodulation circuit 22, the reproduced synchronization clock extraction circuit 23, the parallel-serial conversion circuit 24, the serial-parallel conversion circuit 25, and the header discrimination circuit 26.

Further, based on the track number, the control circuit 2° operates in the same manner as when accessing the alternative processing area described above, and causes the beam light of the optical head 5 to correspond to the track of the target block.

' At this time, the recording data is stored in the recording/reproducing data buffer 30 from the host computer via the external interface circuit 33 and the recording/reproducing data transfer circuit 32 .

Then, a matching signal of the block header of the target block is sent from the header comparator 28 to the recording/reproducing switching circuit 2.
7, the recording data in the recording/reproducing data buffer 30 is supplied by the recording/reproducing switching circuit 27 to the parallel-to-serial converting circuit 24. This parallel
The recording data converted into serial data by the serial conversion circuit 24 is modulated by the modulation circuit 21 and supplied to the laser drive circuit 15. As a result, the laser drive circuit 1
5 records data by driving a semiconductor laser (not shown) within the optical head 5 in accordance with the supplied modulation signal.

After this recording, read-after-write is performed. That is, the block in which the above recording has been performed is read.

That is, the control circuit 20, 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.

Then, a matching signal of the block header of the target block is sent from the header comparator 28 to the recording/reproducing switching circuit 2.
7, the recording/reproducing switching circuit 27 supplies the reproduced data from the serial-to-parallel converting circuit 25 to the recording/reproducing data buffer 30. The reproduced data stored in the recording/reproducing data buffer 30 is subjected to error correction by an error correction code addition/error correction circuit 31 using a weak correction capability. As a result, if no correction error (defect) occurs, the control circuit 20 ends the recording process.

Further, if a correction error (defect) occurs as a result of the above, the control circuit 20 determines the next substitute block to be used based on the recording defect substitute area information, and records the recording data in the substitute block again. After performing this recording, read-after-write is performed in the same manner as described above, and if no correction error (defect) occurs, the control circuit 20 uses a replacement block corresponding to the defective block to store the defect replacement area information at the time of recording in the memory buffer 43. and also this memory buffer 4
3 is recorded in management information areas c and d. Also,
If a correction error (defect) occurs, the control circuit 20 records the recorded data again in another alternative block, and thereafter operates in the same manner as described above (second alternative processing means).

In this way, when checking recorded data,
When a defect is discovered, defect management information can be recorded multiple times.

Furthermore, data can be recorded in other blocks in the same manner as described above. In this case, data is recorded with the frequency of the clock signal increased as the block position is located on the outer circumferential side.

Incidentally, the operation during the above recording is as shown in FIG.

It is also assumed that a block number to be reproduced (accessed) is supplied to the control circuit 20 from a host computer (not shown) via the external interface circuit 33.

Then, the control circuit 20 checks whether the block number is included in the initial defect replacement area information Q of the memory buffer 43, that is, whether it is an initial defect area. As a result of this check, if the area is not an initial defective area, the block number from the host computer is used as the block to be reproduced. Furthermore, if the result of the above check is an initial defective area, the alternative block read out based on the initial defect alternative area information q is set as the block to be reproduced (first alternative processing means).
.

Then, as in the case of recording above, the clock speed information corresponding to the block (block number from the host computer or alternative block) is read out, and a clock signal of a frequency corresponding to this clock speed information is transmitted to the modulation circuit 21. Demodulation circuit 22, reproduction synchronization clock extraction circuit 23
, a parallel-serial conversion circuit 24, a serial-parallel conversion circuit 25, and a header discrimination circuit 26.

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

Then, a matching signal of the block header of the target block is sent from the header comparator 28 to the recording/reproducing switching circuit 2.
7, the recording/reproducing switching circuit 27 supplies the reproduced data from the serial-to-parallel converting circuit 25 to the recording/reproducing data buffer 30. The reproduced data stored in the recording/reproducing data buffer 30 is subjected to error correction by an error correction code addition/error correction circuit 31 using normal error correction capability. As a result, if no correction error (defect) has occurred, the control circuit 2o transfers the reproduced data to the host computer via the recording/reproducing data transfer circuit 33 and the external interface circuit 33,
End the playback process.

If a correction error (defect) occurs as a result of the above, the control circuit 20 reads a replacement block corresponding to the defective block from the recording defect replacement area information in the memory buffer 43, and records data of the replacement block. Similarly to the above, correction is performed using normal error correction capability and reproduction is performed. Then, the control circuit 20 transfers the playback data from the alternative block to the host computer via the recording/playback data transfer circuit 33 and the external interface circuit 33,
End the playback process.

Further, when reproducing data of another block, it can be performed in the same manner as described above. In this case, data is reproduced with the frequency of the clock signal being increased as the block position is located on the outer circumferential side.

Note that the operation during the above-mentioned reproduction is as shown in FIG.

Further, when the optical disc 1 is removed (when 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 and updates the management information area c of the optical disc 1, Record in the first unrecorded area of d.

As mentioned above, in order to improve the reliability of recorded data, the optical disk device itself can perform alternative processing for defective areas at the initial stage or during recording, thereby reducing the processing time during recording. By freeing the host computer from alternative processing, processing can be reduced.

Furthermore, since the capacity of the memory buffer for storing defect management information is 4K bytes, which is the same as the minimum recording unit on an optical disc, processing becomes easier.

Furthermore, by reproducing the latest defect management information, all the previous information can be obtained, so that the time required to load the defect management information from the optical disc into the memory buffer when starting the optical disc apparatus can be shortened.

Furthermore, the recording defect replacement area information in the memory buffer is updated each time recording replacement processing is performed.
Every time an optical disc is closed, 4K bytes of defect management information consisting of initial defect replacement area information and recording defect replacement area information of the memory buffer is recorded in the management information area in the substitute processing area of the optical disc. It has become so. In this case, since the initial defect replacement area information and the latest recording defect replacement area information are combined, each piece of information can be recorded on the optical disk without special processing.

Furthermore, 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, and the reliability of the defect management information is improved.

Furthermore, since all defect management can be performed on the optical disc device side, compatibility with other optical disc recording formats can be achieved.

Furthermore, since the alternative area information as management information for initial defects and recording defects is one unit, the speed of internal processing can be improved.

In the above embodiments, an optical disk is used as the information recording medium, but the information recording medium is not limited to this, and may be a magnetic disk, a floppy disk, a laser card, or the like.

[Effects of the Invention] As detailed above, according to the present invention, the processing time when recording information can be shortened, and the processing can be reduced by freeing the host computer from alternative processing. , it is possible to provide an information processing device that facilitates processing of defect management information.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a diagram for explaining an example of storage of a memory buffer, FIG. 2 is a diagram schematically showing the configuration of an optical disk device, and FIG. 4 is a plan view showing the structure of the optical disc, FIG. 5 is a plan view showing the alternative processing area and the user area, and FIG. 6 is a plan view showing the structure of the alternative processing area. 7 is a diagram illustrating an example of recording of the management information area; FIG. 8 is a diagram illustrating an example of recording defect management information; FIG. 9 is a diagram illustrating an example of how the conversion table is stored. , FIG. 10 is a flowchart for explaining the recording operation, and FIG. 11 is a flowchart for explaining the reproduction operation. 1... Optical disk (information recording medium), 1a... Recording film, a... Proxy processing area (alternative processing recording area), b... User area (user recording area), c,
d... Management information area, e... Alternative block area, f... Defect management information, Q... Initial defect replacement area information, h... Defect replacement area information during recording, 20...
- Control circuit, 31...Error correction code addition/error correction circuit, 43...Memory buffer (storage means). Applicant's representative Patent attorney Takehiko Suzue Figure 1 Block n Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (4)

[Claims] (1) In an information processing device that records or reproduces information on an information recording medium on which defect management information indicating an alternative area to a defective area at the time of manufacturing or information recording is recorded, the minimum a storage means having a capacity that is an integral multiple of a recording unit and storing defect management information indicating an alternative area for a defective area read from the information recording medium during manufacturing or during information recording; At this time, it is determined whether the area to be accessed is a defective area based on the defect replacement area information in the storage means, and if it is a defective area,
a first alternative processing means for recording or reproducing information in the alternative area based on the defect management information; When reproduction cannot be performed correctly, the recording area is treated as a defective area and information is recorded in another area, and the correspondence between the defective area and another recording area is stored in the storage means as defect management information. An information processing device comprising: an alternative processing means; and an information processing device. (2) The defect management information is composed of initial defect replacement area information indicating a replacement area for initial defects during manufacturing and recording defect replacement area information indicating a replacement area for defects during information recording. An information processing device according to claim 1, characterized in that: (3) When reproducing information, the information is reproduced by performing error correction on the read information, and if this information cannot be reproduced correctly, the defective area for the recording area is replaced with defect replacement area information. Claim 2, characterized in that the information is reproduced by reading the information from the defective area and reading the information of the defective area thus read.
The information processing device described in the section. (4) The information processing apparatus according to claim 1, wherein the storage means has a capacity of 4 Kbytes, which is the same as the minimum recording unit of the recorded information.