JP2003178538A - Optical recording medium recording / reproducing method and apparatus - Google Patents

Abstract

(57) [Problem] To remedy a defect even if an optical recording medium has a defective recording block that cannot be repaired even by an error correction code, by immediately performing a replacement process in another area. SOLUTION: When a normal recording block having no defect is accessed, information is recorded or reproduced in that recording block as it is, and when there is access to the defect recording block 32, 33, the defect recording block 32, 33 is accessed. The next recording indicated by the moving direction 36 to the replacement recording block according to the information written in the defect management circuit for storing and managing the positional relationship between the defect recording block and the replacement recording block without recording or reproducing the information at Information is recorded or reproduced in the replacement recording blocks 34 and 35 which are blocks.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording medium recording / reproducing method and apparatus capable of recording / reproducing information on / from an optical recording medium having a defect.

[0002]

2. Description of the Related Art FIG. 1 shows an example of an optical recording medium, here a laminated waveguide hologram optical card (hereinafter referred to as an optical card), in which a hologram recording film (hereinafter referred to as a recording film) is formed on a transparent substrate 11 made of glass or the like. ) 12 are laminated, for example, about 100 layers. Further, each recording film 12 has a plurality of minimum unit recording blocks 13 for recording or reproducing information arranged in a predetermined array, and information can be recorded or reproduced for each recording block and each recording film. .

FIG. 2 shows an example of a conventional optical recording medium recording / reproducing apparatus for the above-mentioned optical card.
Is the above-mentioned optical card, 21 is a laser for generating a flat reference light corresponding to one recording film of the optical card 10, and 22 is a recording light (object light) corresponding to the size of a recording block of the optical card 10. An object light generator 23 for receiving the reproducing light C corresponding to the size of the recording block of the optical card C
It's a CD.

In the above apparatus, the recording of information on the optical card 10 is performed by irradiating the flat reference light 24 generated by the laser 21 on the recording film including the recording block to be recorded from the side surface of the optical card 10. The object light 25 is applied to the recording block to be recorded from below. In addition, the reproduction of information from the optical card is similar to the recording, and the flat reference light 24 generated by the laser 21 on the recording film including the recording block to be reproduced from the side surface of the optical card 10.
Is performed, and the reproduction light from the recording block to be reproduced is read by the CCD 23 placed above the optical card 10.

Information is recorded or reproduced on a desired recording film and a desired recording block of the optical card 10.
This is performed by changing the relative positional relationship between the laser 21, the object light generator 22 and the CCD 23 and the optical card 10 by a drive (not shown), or by optically changing the position of each light beam.

[0006]

Normally, in this type of device, in consideration of the case where information cannot be correctly recorded / reproduced due to defects in the recording film of an optical card, information is recorded by adding an error correction code or the like. There is. However, there are many defects,
When there are a large number, the error correction code cannot correct the error, and the correct information cannot be recorded.

Therefore, conventionally, when recording information, after recording information in recording block units, immediately reproducing information to confirm whether correct information can be obtained, and if correct information must be obtained. For example, the recording film or the entire optical card including the recording block (hereinafter, defective recording block) is not used because the error correction is impossible.

The present invention has improved such a conventional defect, and an object thereof is to quickly perform replacement processing on another area even if there is a defective recording block which cannot be repaired by an error correction code on an optical recording medium. The purpose is to remedy defects.

[0009]

In order to achieve the above object, the present invention provides an optical recording having at least one recording film having a plurality of minimum unit recording blocks for recording or reproducing information arranged in a predetermined arrangement. Irradiating a recording film including a recording block to be recorded with a reference light to a medium, irradiating the recording block with the recording light to record information, and irradiating a recording film including a recording block to be reproduced with the reference light. At the same time, in the optical recording medium recording / reproducing method of receiving the reproduction light from the recording block to reproduce the information, the recording block in which a normal or error-correctable code recovers error is directly recorded in the recording block. For defective recording blocks that record or reproduce and generate errors that cannot be repaired with error correction codes, switch to another recording block. And performing recording or reproduction of information.

According to the above structure, even if the optical recording medium has a defective recording block that cannot be repaired by an error correction code, it is possible to switch to another recording block to record or reproduce information, and the defective recording block The recording film including it or the entire optical recording medium does not become unusable.

Here, the different recording block may be a recording block at an address next to the defective recording block on the address representing each recording block, or a spare recording block prepared in advance in the same recording film. good.

Further, in the present invention, in order to achieve the above-mentioned object, recording to be recorded on an optical recording medium comprising a plurality of recording films having at least one recording block of a minimum unit for recording or reproducing information. The recording film including the block is irradiated with the reference light, the recording block is irradiated with the recording light to record information, and the recording film including the recording block to be reproduced is irradiated with the reference light and the reproduction light from the recording block is also recorded. In a recording / reproducing method of an optical recording medium that receives light and reproduces information, for a recording block in which a normal or error recoverable error occurs, the information is directly recorded or reproduced in the recording block to correct the error. For a defective recording block that causes an error that cannot be repaired even with a code, cut the recording film including the defective recording block into a different recording film. And performing recording or reproduction of information in place.

According to the above structure, even if the optical recording medium has a defective recording block that cannot be repaired by an error correction code, it is possible to switch to another recording film to record or reproduce information, and the defective recording block The entire optical recording medium including it will not become unusable.

Here, the different recording film may be a recording film adjacent to the recording film including the defective recording block in terms of physical position in the same optical recording medium, or may be prepared in advance in the same optical recording medium. It is also possible to use a spare recording film that has been prepared.

Further, the above-mentioned optical recording medium recording / reproducing method includes an optical recording medium having at least one recording film having a plurality of minimum unit recording blocks for recording or reproducing information arranged in a predetermined arrangement, and an optical recording. Reference light generating means for generating reference light corresponding to the recording film of the medium, recording light generating means for generating recording light corresponding to the size of the recording block of the optical recording medium, and size of the recording block of the optical recording medium And a light receiving unit for receiving a reproduction light corresponding to the recording light, the recording film including the recording block to be recorded is irradiated with the reference light from the reference light generating unit, and the recording light generating unit is applied to the recording block. Information is recorded by irradiating the recording light from the recording medium, the recording film including the recording block to be reproduced is irradiated with the reference light from the reference light generating means, and the reproducing light from the recording block is received by the light receiving means. In an optical recording medium recording / reproducing apparatus which receives light and reproduces information, a defect recording block in which an error that cannot be repaired by an error correction code is generated, and another recording block which records or reproduces information instead of the defect recording block Defect management means for managing the positional relationship of
When the recording block for recording or reproducing the information is a defective recording block, it is provided with control means for recording or reproducing the information in another recording block according to the information managed by the defect management means. Optical recording medium recording / reproducing apparatus, or an optical recording medium in which a plurality of recording films having at least one minimum unit recording block for recording or reproducing information are laminated, and reference light corresponding to the recording film of the optical recording medium. For generating the recording light, recording light generating means for generating recording light corresponding to the size of the recording block of the optical recording medium, and receiving light for receiving reproducing light corresponding to the size of the recording block of the optical recording medium. Means for irradiating the recording film including the recording block to be recorded with the reference light from the reference light generating means to the optical recording medium, and recording light to the recording block. Information is recorded by irradiating the recording light from the recording means, the recording film including the recording block to be reproduced is irradiated with the reference light from the reference light generating means, and the reproducing light from the recording block is received by the light receiving means. In an optical recording medium recording / reproducing apparatus that reproduces information by using a recording film including a defective recording block that causes an error that cannot be repaired even with an error correction code, and recording or reproducing information instead of the recording film including the defective recording block. If the defect management unit that manages the positional relationship with another recording film and the recording block that records or reproduces information is a defect recording block, another recording film of another recording film is recorded according to the information managed by the defect management unit. It can be realized by an optical recording medium recording / reproducing apparatus characterized by comprising control means for recording or reproducing information in a recording block.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] In the case of a rewritable optical recording medium that can be read and written at random, initialization is performed in recording film units before the user uses it. In the first embodiment, when a defective recording block is found during this initialization, the recording block is shifted to the next recording block to perform the defect relief processing.

Here, shifting the recording block to the next recording block means using the recording block at the address next to the defective recording block on the address representing each recording block.

FIG. 3 is for explaining the first embodiment. In the figure, 30 is a recording film of an optical card in which recording blocks are arranged in 4 rows × 5 columns, 31 is an address (address) step. Advancing direction, 32 and 33 are defect recording blocks 1, 2, 34 and 3
Reference numeral 5 is a replacement recording block 1, 2, and 36 is a moving direction to the replacement recording block.

FIG. 4 shows an example of an embodiment of an optical recording medium recording / reproducing apparatus of the present invention. In the figure, the same components as those in FIG. 2 are represented by the same reference numerals. That is, 21 is a laser, 2
2 is an object light generator, 23 is a CCD, 27 is a defect management circuit that stores and manages the positional relationship between defective recording blocks and replacement recording blocks, and 28 is a normal recording block for recording or reproducing information. In the case, the information is recorded or reproduced as it is, and when it is a defective recording block, a control circuit for recording or reproducing information in the replacement recording block according to the information managed by the defect management circuit 27, 29 is a control circuit A drive including 28.

The defect management circuit 27 includes a control circuit 2
8, it is assumed that the positional relationship between the defective recording block and the replacement recording block found at the time of the above-described initialization is written. Further, in FIG. 4, it is assumed that the solid line represents the electrical connection relationship and the broken line represents the physical connection relationship.

Next, an outline of the operation of this embodiment will be described.
First, the optical card 10 is attached to the drive 29. Then, when a normal recording block having no defect in the recording film 30 is accessed from the host device, the control circuit 28 controls the drive 29 so as to record or reproduce the information in the recording block as it is. However, when the defect recording blocks 32 and 33 of the recording film 30 are accessed, the control circuit 28 does not record or reproduce information in the defect recording blocks 32 and 33, and according to the information written in the defect management circuit 27. , Direction of movement to the replacement recording block 36
Replacement recording block 34, which is the next recording block indicated by
Drive 29 to record or play information
To control.

Thus, when there is a defective recording block, information is recorded or reproduced by shifting to the next replacement recording block.

[Second Embodiment] In the second embodiment, when a defective recording block is found after initialization, the defect relief processing is performed by switching the recording block to a spare recording block.

Here, switching a recording block to a spare recording block means using a spare recording block prepared in advance in the same recording film instead of the defective recording block.

FIG. 5 is for explaining the second embodiment. In the figure, 40 is a recording film of an optical card in which recording blocks are arranged in 4 rows × 5 columns, and 41 is information of the recording film 40. Area 42 is a preliminary recording area of the recording film 40, 43 and 44 are defective recording blocks 1, 2, 45 and 46 are replacement recording blocks 1, 2 and 47 are moving directions to the replacement recording blocks.

In the apparatus configuration corresponding to this embodiment, when the defective recording block is found after initialization, the control circuit 28 adds the positional relationship between the defective recording block and the replacement recording block to the defect management circuit 27. It may be basically the same as that of FIG. 4 except that it is written.

Next, an outline of the operation of this embodiment will be described.
First, the optical card 10 is attached to the drive 29. Then, when a normal recording block having no defect on the recording film 40 is accessed from the higher-level device, the control circuit 28 controls the drive 29 so as to record or reproduce information in the recording block as it is. However, when the defect recording blocks 43 and 44 of the recording film 40 are accessed, the control circuit 28 does not record or reproduce information in the defect recording blocks 43 and 44, and according to the information written in the defect management circuit 27. , Moving direction to the replacement recording block 47
Replacement recording block 4 which is a spare recording block indicated by
The drive 29 is controlled so as to record or reproduce the information by 5, 46.

As described above, when there is a defective recording block, information is recorded or reproduced in the spare replacement recording block. Regarding the defective recording block found at the time of initialization, the information may be recorded or reproduced in the spare replacement recording block instead of the recording block at the address next to the defective recording block.

[Third Embodiment] Even if the first or second embodiment cannot repair the problem, that is, if the recording film contains a large number of defective recording blocks, each recording film is switched to another recording film to cause a defect. The relief processing is performed in the third embodiment.

Here, switching to another recording film for each recording film means that a recording film adjacent to a recording film containing a large number of defective recording blocks is used because of its physical position in the same optical card.
Alternatively, it means using a spare recording film prepared in advance in the same optical card.

FIG. 6 is for explaining the third embodiment. In the figure, 50 is a recording film of an optical card, 51 is a defective area of the recording film 50, and 52 is information of the recording film 50 instead of the recording film 50. It is an alternate recording film for recording or reproducing. The recording film 5
Similarly to the above, recording blocks 0 and 52 are arranged in 4 rows × 5 columns.

The apparatus configuration corresponding to the present embodiment has a defect management circuit 27 in which a defect recording film containing a large number of defect recording blocks and an alternate recording film for recording or reproducing information instead of the defect recording film. Basically, except that the positional relationship between the defective recording film and the replacement recording film, which is found at the time of initialization and thereafter, is written in the defect management circuit 27 while the positional relationship between the defective recording film and the positional relationship between the defective recording film and the replacement recording film is also managed. It can be the same as the one in 4.

Next, an outline of the operation of this embodiment will be described.
First, the optical card 10 is attached to the drive 29. Then, when the host device accesses a normal recording block having no defect in the optical card 10, the control circuit 28 controls the drive 29 so as to record or reproduce the information in the recording block as it is. However, the defective area 5 of the recording film 50 including a large number of defective recording blocks of the optical card 10.
When there is an access to 1, the recording film cannot record or reproduce information. Therefore, the control circuit 28 does not record or reproduce information on the defect recording film 50, but records or reproduces information on the adjacent replacement recording film or the spare replacement recording film 52 according to the information written in the defect management circuit 27. The drive 29 is controlled so that

As described above, when there is a defective recording film, information is recorded or reproduced on the adjacent alternative recording film or the spare alternative recording film.

In the case of a rewritable optical recording medium,
The recognition of the defect in the recording block or the recording film is performed by recording the reference data for initialization and read-verifying at the time of initialization, and recording and reading-verifying the data after initialization.

[Fourth Embodiment] As a fourth embodiment, as described above, the optical recording medium is not a rewritable optical recording medium that can be randomly read and written, but a write-once, that is, an optical recording medium that can be written only once. Will be described.

When such a medium is used, information is recorded on one recording block and information is immediately reproduced,
Read-verify if it is recorded correctly,
If there is no error, the address is incremented. At this time, if there is an error, the step proceeds to the replacement recording block of the next address as described with reference to FIG. 3, or the same information is again provided to the spare replacement recording block as described with reference to FIG. Record.

In this way, the defect recording block is processed, the defect address is stored in the defect management circuit, and when the next defect recording block is accessed (reproduction access), the instruction of the defect management circuit is given. To access the replacement recording block.

When most of the recording film has a defect,
As in the case of the third embodiment, writing is performed on the adjacent alternative recording film or the spare alternative recording film.

[0040]

As described above, according to the present invention,
Even if there is a defective recording block that cannot be repaired even with an error correction code, by switching to the recording block at the next address or the spare recording block, or by switching each recording film to the adjacent recording film or spare recording film, , It becomes possible to record or reproduce information.

[Brief description of drawings]

FIG. 1 is a structural diagram showing an example of an optical recording medium.

FIG. 2 is a configuration diagram showing an example of a conventional optical recording medium recording / reproducing apparatus.

FIG. 3 is an explanatory diagram showing a first embodiment of a recording / reproducing method of an optical recording medium of the present invention.

FIG. 4 is a configuration diagram showing an example of an embodiment of an optical recording medium recording / reproducing apparatus of the present invention.

FIG. 5 is an explanatory diagram showing a second embodiment of a recording / reproducing method of an optical recording medium of the present invention.

FIG. 6 is an explanatory diagram showing a third embodiment of a recording / reproducing method for an optical recording medium of the present invention.

[Explanation of symbols]

10: optical card, 11: substrate, 12: recording film, 13: recording block, 21: laser, 22: object light generator, 2
3: CCD, 24: reference light, 25: object light, 26: reproducing light, 27: defect management circuit, 28: control circuit, 29: drive, 30, 40, 50: recording film, 31: address step direction, 32, 33: defective recording block, 34, 35: replacement recording block, 36: moving direction to replacement recording block,
41: information area, 42: preliminary recording area, 43, 44: defective recording block, 45, 46: replacement recording block, 4
7: moving direction to the replacement recording block, 51: defective area,
52: Alternate recording film.

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) G11B 7/0065 G11B 7/0065 20/10 20/10 C 20/12 20/12 (72) Inventor Yasuko Ando Tokyo Nihon Telegraph and Telephone Corporation, 2-3-1 Otemachi, Chiyoda-ku (72) Inventor Masakatsu Chida 2-3-1, Otemachi, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Hiroshi Yoshikawa 2-3-1, Otemachi, Chiyoda-ku, Tokyo F-Term inside Nippon Telegraph and Telephone Corporation (reference) 5D044 BC02 CC08 DE38 DE62 DE68 FG19 5D090 AA03 DD01 EE20 FF27 FF43 GG11 LL02

Claims (8)

[Claims] 1. An optical recording medium having at least one recording film comprising a plurality of recording blocks, each of which is a minimum unit for recording or reproducing information, arranged in a predetermined arrangement, and refers to a recording film including a recording block to be recorded. Information is recorded by irradiating light and irradiating the recording block with recording light to record information, irradiating the recording film including the recording block to be reproduced with reference light, and receiving the reproducing light from the recording block to reproduce information. In the optical recording medium recording / reproducing method for performing, for a recording block in which an error that can be repaired with a normal or error correction code is recorded, information is recorded or reproduced in that recording block as it is, and an error that cannot be repaired with an error correction code is generated. For the defective recording block to be recorded, optical recording characterized by switching to another recording block to record or reproduce information Body recording and reproducing method. 2. The recording / reproducing method for an optical recording medium according to claim 1, wherein the another recording block is a recording block at an address next to the defective recording block in an address representing each recording block. 3. The optical recording medium recording / reproducing method according to claim 1, wherein the different recording block is a spare recording block prepared in advance in the same recording film. 4. An optical recording medium comprising a plurality of recording films having at least one recording block as a minimum unit for recording or reproducing information, and irradiating the recording film including a recording block to be recorded with reference light. At the same time, the recording block is irradiated with recording light to record information, the recording film including the recording block to be reproduced is irradiated with the reference light, and the reproducing light from the recording block is received to reproduce the information. In the medium recording / playback method, for a recording block that causes a normal or error that can be repaired with an error correction code, the information is recorded or played back with that recording block as it is, and a defective recording block that causes an error that cannot be repaired with an error correction code. With respect to the above, it is necessary to switch to another recording film for each recording film including the defective recording block to record or reproduce information. Optical recording medium recording and reproducing method according to symptoms. 5. The optical recording according to claim 4, wherein the another recording film is a recording film adjacent to a recording film including a defective recording block in terms of a physical position in the same optical recording medium. Medium recording / reproducing method. 6. The optical recording medium recording / reproducing method according to claim 4, wherein the another recording film is a spare recording film prepared in advance in the same optical recording medium. 7. An optical recording medium having at least one recording film having a plurality of recording blocks of a minimum unit for recording or reproducing information arranged in a predetermined arrangement, and a reference beam corresponding to the recording film of the optical recording medium. Reference light generating means for generating, recording light generating means for generating recording light corresponding to the size of the recording block of the optical recording medium, and light receiving means for receiving reproducing light corresponding to the size of the recording block of the optical recording medium And irradiating an optical recording medium with reference light from a reference light generating unit to a recording film including a recording block to be recorded, and irradiating the recording block with recording light from the recording light generating unit to record information. Optical recording medium recording for reproducing information by irradiating a recording film including a recording block to be recorded and reproduced with a reference light from a reference light generating means and receiving a reproduction light from the recording block by a light receiving means In the reproducing apparatus, defect management means for managing the positional relationship between a defective recording block that causes an error that cannot be repaired even with an error correction code and another recording block that records or reproduces information in place of the defective recording block, and information. When the recording block for performing the recording or reproducing of is a defective recording block, it is provided with control means for recording or reproducing the information in another recording block according to the information managed by the defect management means. Optical recording medium recording / reproducing apparatus. 8. An optical recording medium in which a plurality of recording films having at least one recording block of a minimum unit for recording or reproducing information are laminated, and a reference light for generating a reference light corresponding to the recording film of the optical recording medium. And a recording light generating means for generating recording light corresponding to the size of the recording block of the optical recording medium, and a light receiving means for receiving reproducing light corresponding to the size of the recording block of the optical recording medium, With respect to the optical recording medium, recording information is recorded by irradiating the recording film including the recording block to be recorded with the reference light from the reference light generating unit and irradiating the recording block with the recording light from the recording light generating unit,
In an optical recording medium recording / reproducing apparatus for irradiating a recording film including a recording block to be reproduced with a reference light from a reference light generating means and receiving the reproducing light from the recording block by a light receiving means to reproduce information, Defect management means for managing the positional relationship between a recording film including a defective recording block that causes an error that cannot be repaired even with a correction code and another recording film that records or reproduces information instead of the recording film including the defective recording block. And, if the recording block for recording or reproducing information is a defective recording block, control means for recording or reproducing information on a recording block of another recording film according to the information managed by the defect management means. An optical recording medium recording / reproducing apparatus characterized by being provided.