JP2000339869A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the continuation of the recording or reproducing operation without interruption during the continuous recording or reproducing operation even in the state when either one of the spare area or the defective list is used up. SOLUTION: In the case when the defective block is generated on the optical disk 71 in the process of the data recording or reproducing operation and such an erroneous state is induced that at least either one of the spare area for recording alternate data of the defective block or the defective list for recording the address of the defective block is used up, the arrangement is made so that the alternate data or the address of the defective block is continuously stored in a memory 1 and an alternate buffer memory 2, after the recording or the reproduction of at least one of the continued data is finished, or when the optical disk 71 is taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device that can be used as a DVD-RAM, and more particularly to an optical disk device that is rewritable and has defect management means.

[0002]

2. Description of the Related Art The hardware configuration of an optical disk device (hereinafter also referred to as a DVD-RAM device) of this type which is rewritable and has defect management means is as shown in FIG. The optical disk device section 500 that drives the optical disk to perform data management such as writing, reading, and defect management of information, and the processing and reading of information written to the optical disk device section 500 in cooperation with the optical disk apparatus section 500. A host computer section 600 for processing information.

An optical disk device section 500 reads information from an optical disk (hereinafter also referred to as a DVD-RAM), and a pickup 501 for writing to the optical disk, a servo circuit 502 for driving and controlling the optical pickup 501, and reading by an optical pickup 501. Signal processing circuit 503 for performing signal processing on the information and the information to be written via the optical pickup, an input / output circuit 504 forming an interface for inputting and outputting the signal processed and the signal for signal processing, ROM 505, RAM 506, ROM
A control circuit 507 for storing data to be written to the optical disk, storing and managing data read from the optical disk in cooperation with the RAM 505 and the RAM 506 is provided.

The host computer section 600 includes an input / output circuit 601, an RAM 602, a ROM 603, and an H for forming an interface for inputting a signal from the input / output circuit 504 and transmitting a signal to the input / output circuit 504.
It includes a DD (hard disk driver) 604, a control circuit 605 composed of a computer, and an input / output circuit 606 forming an interface for exchanging signals with a CRT and a keyboard.

[0005] The system configuration of the optical disk device is shown in FIG.
The system is divided into an optical disk device part 70 and a data management part 80 systematically.

[0006] The optical disk device portion 70 includes an optical disk 7.
1, a data demodulation / access control unit 72, an address conversion unit 73 that converts between a physical address and a logical address,
A RAM 74 for storing a zone configuration table, which is information on zones, etc., that divide the user area of the optical disk 71; a RAM 75 for storing a primary defect list (defect list 1); a RAM 76 for storing a secondary defect list (defect list 2); An input / output buffer memory 77 and an input / output circuit 78 are provided.

The RAM 74, the RAM 75, and the RAM 76 save a zone configuration table, a defect list 1, and a defect list 2 which are respectively recorded at the end of the lead-in area and the beginning of the lead-out area of the optical disk, which will be described later. Is stored.

The data management section 80 comprises a host computer section 600 and includes a storage area 81 for storing application programs, a storage area 82 for storing data management information, and a storage area 83 for storing operating system information. I / O buffer memory 8
4. An input / output circuit 85 that forms an interface for inputting and outputting information to and from the input / output circuit 78 is functionally provided.

In the optical disk device having the above configuration, when accessing the user data in the optical disk device portion 70 from the host computer unit 600 through an interface such as ATAPI, a logical address used in the file system of the optical disk 71 is used. . When a request for an optical disk is received from the host computer unit 600 using a logical address, the zone configuration table, defect list 1 and defect list 2 at the end of the lead-in area and the head of the lead-out area of the optical disk 71 are referred to. While they are converted into physical addresses by the address conversion unit 73, they are sent to the data demodulation / access control unit 72. The data is now read through the data channel and transferred to the host computer 600.

[0010] The optical disk is divided into a lead-in area, a data area and a lead-out area as shown in FIG. FIG. 7B shows the physical address of the optical disk and the positions of the defect management area and the data area. Also,
Spare areas are provided on the inner peripheral side and outer peripheral side of the optical disk 71, and the spare area on the outer peripheral side is configured to be expandable, and is also referred to as an extended spare area in this specification.

In the DVD-RAM device portion 70, a defect list (PDL, Primary Defect List) is provided.
And secondary defect list (SDL, Secondly Defect List)
Are recorded at the end of the lead-in area on the inner peripheral side of the optical disc 71 and at the beginning of the lead-out area on the outer peripheral side together with the zone configuration table. This area on the optical disk is defined as a defect management area (DMA, Defect Man
agement Areas). If a total of four defect lists are saved normally, they will all be the same.

FIG. 8 shows a zone configuration table (DDS, Disc Defin).
ition Structure). In a DVD-RAM disk (4.7 GByte version), the data area is divided into 35 zones, and a spare area is provided on the inner peripheral side of the optical disk. The zone configuration table describes a logical address number (LSN) indicating the start position of each zone. The DDS / PLD update counter is used to identify the most recent zone configuration table even if the four defect lists do not match.

The DVD-RAM device employs a defect compensation system of slip replacement, linear replacement and skip replacement.

The slip replacement will be described with reference to FIG. Slip alternation applies to initial defects. DVD-RA
If a defective sector is found in the certification of the M disk, the sector is skipped. Use the next sector instead. Defective sectors are determined from errors in address signals and data signals. The slip-replaced initial defect is registered in a defect list 1 (PDL, Primary Defect List).

The defect list 1 stores the physical address of the defective sector that has undergone slip replacement, and a maximum of 7679 defects can be registered. FIG. 9 illustrates a defect list 1, a user area a without a defective sector, and a user area b with a defective sector. The physical addresses of the defective sectors are sequentially stored in the defect list 1. As illustrated in FIG. 9, when there are defects in m sectors on the inner circumference side, the physical address of each defective sector is the defect registration record number 1
When the n outer sectors have defects, the physical addresses of the defective sectors are stored in the defect registration numbers (m + 1) to (m + n).

The slip replacement is performed in the data area.
For example, as shown in FIG. 9, when a defective sector occurs in m sectors and n sectors, (m + n) sectors are shifted to the head of the spare area at the head of the user area.

The linear replacement will be described with reference to FIG. Linear replacement applies to secondary defects. The linear replacement is performed in units of error correction blocks. When a row having a predetermined number of errors or more is found, the block is determined to be defective and is not used (block A in FIG. 10). Instead, a block in the spare area of the optical disk is used (block A 'in FIG. 10). Here, one block is formed of consecutive valid sectors (sectors excluding defective sectors).

In the linearly replaced portion, the spare area is accessed each time the data passes through a defective sector, and data recording / reproducing work is performed. The replaced logical sector is assigned the same logical address as the original sector. The secondary defect is registered in a defect list 2 (SDL, Secondary Defect List).

In the case of linear replacement, the physical address of the head sector of the defective block and the physical address of the head sector of the replaced block are registered in the defect list 2.

Next, skip replacement will be described with reference to FIG. Skip replacement is applied to secondary defects as in linear replacement. Skip replacement is especially real-time AV
(Audio video) Used to record data. The skip replacement is performed in units of error correction blocks, and when a row having an error equal to or more than a specified number is found, the block is determined to be defective and is not used (block B in FIG. 10). Instead of this, the next normal block is used (block B 'in FIG. 10).

In the case of skip replacement, the physical address of the head sector of the defective block is stored in the defect list 2 together with the SLR flag bit 1.

The replaced sector is assigned the same logical address as the original sector. The secondary defect is registered in the defect list 2. The determination of linear replacement is made by recording 000000h in the physical address of the first sector of the replaced block and setting the SLR flag bit to 1. Here, h indicates hexadecimal notation.

[0023]

However, when defect management is performed by the above-mentioned conventional optical disk device,
The size of a spare area for recording replacement data of a replacement block for replacing data of a defective block and the size of a defect list for registering addresses of the defective block are determined according to the physical standard of the optical disk used. Therefore, when at least one of the spare area and the defect list is used up, there is a problem that defect management cannot be performed.

Furthermore, if a new defective block occurs while at least one of the spare area and the defect list is used up during video recording in real time recording or the like, a defect management error occurs and an Recording is interrupted or stopped, and it becomes impossible to record important real-time data.

The present invention provides an optical disk device capable of continuing recording or reproduction without interruption during continuous recording or reproduction even when either the spare area or the defect list is used up. The purpose is to:

[0026]

An optical disk device according to a first aspect of the present invention is an optical disk device having defect management means for an optical disk, wherein at least a defective block is generated on the optical disk during data recording or reproduction. At least one of continuous data is recorded or reproduced when an error state occurs in which one of a spare area for recording replacement data of a defective block and a defect list for recording an address of the defective block is almost exhausted. During this time, the replacement data of the defective block on the side where the error has occurred or the address of the defective block is kept stored in the memory of the optical disk device.

According to the optical disk apparatus of the present invention, at least one of a spare area for recording replacement data of a defective block and a defect list for recording an address of the defective block during data recording or reproduction. When an error state is reached in which one of them is almost exhausted, while recording or reproducing at least one continuous data, the replacement data of the defective block on the error side or the address of the defective block of the optical disk apparatus is changed. Since the data is continuously stored in the memory, the defect management is not disabled, and the recording on the optical disk and the reproduction are not interrupted.

Therefore, even when the spare area has been exhausted but the defect list for recording the address of the defective block has not been exhausted, even when the defect list for recording the address of the defective block has been exhausted but the spare area has not been exhausted yet. Even when the defect list for recording the addresses of the spare area and the defective block is exhausted, the defect management is not disabled, and the recording or reproduction can be continued even when the error state is almost reached.

According to a second aspect of the present invention, there is provided an optical disk device according to the first aspect, wherein a defective block is generated on the optical disk during data recording or reproduction, and alternative data of the defective block is recorded. When the spare area on the side is almost exhausted, an extended spare area is created on the outer peripheral side of the optical disc after recording or reproduction of at least one continuous data is completed, or when the optical disc is ejected, The information stored in the memory of the apparatus is written.

According to the optical disk apparatus of the second aspect of the present invention, a defective block is generated on the optical disk during data recording or reproduction, and the spare area on the inner and outer peripheral sides for recording alternative data of the defective block is almost exhausted. When an error occurs, an extended spare area is created on the outer peripheral side of the optical disk after recording or reproduction of at least one continuous data is completed, or when the optical disk is taken out, and the information stored in the memory of the optical disk device is read. Recording or reproduction can be continued even when the data is written and almost in an error state.

According to a third aspect of the present invention, there is provided the optical disk device according to the first aspect, wherein at least one continuous data is recorded or reproduced after the end of the data or when the optical disk is taken out from the host computer. In order to write information stored in the memory of the optical disk device in an area managed by the file system, the data is transmitted to the host computer.

According to the optical disc apparatus of the present invention, the area managed by the host computer in the file system of the optical disk after the end of recording or reproduction of at least one continuous data or at the time of taking out the optical disk. In order to write the information stored in the memory of the optical disk device, the data is transmitted to the host computer, and the information stored in the memory of the optical disk device is written into the file system area of the optical disk. The information is held, and recording or reproduction can be continued even when almost in an error state.

An optical disk device according to a fourth aspect of the present invention is an optical disk device having defect management means for an optical disk, wherein a defective block occurs on the optical disk during data recording or reproduction, and substitute data for the defective block is recorded. When an error state is reached in which one of the spare area to be recorded and the defect list for recording the address of the defective block is almost exhausted, the optical disk apparatus sends the address of the defective block together with the defect management error information to the host computer. It is characterized in that it is included and transmitted.

According to the optical disk apparatus of the present invention, a defective block occurs on the optical disk during data recording or reproduction, and a spare area for recording alternative data of the defective block or an address of the defective block is recorded. When an error state occurs in which one of the defect lists is almost exhausted, the defect management error information is transmitted from the optical disk device to the host computer together with the defect management error information and the address of the block in which the defect has occurred. At the same time, the address of the block in which the defect has occurred is held, so that recording or reproduction can be continued even when the block is almost in an error state.

According to a fifth aspect of the present invention, in the optical disk device of the fourth aspect, write data of a defective block is added together with defect management error information and transmitted to a host computer. .

According to the optical disk apparatus of the present invention, the write data of the defective block is added to the defect management error information and transmitted to the host computer, and the defect management error information and the write data of the defective block are retained. Thus, recording or reproduction can be continued even when an almost error state occurs.

According to the optical disk device of the present invention, in an optical disk device having defect management means for an optical disk, a defective block is generated during data recording or reproduction, and substitute data for the defective block in the optical disk is replaced. When an error state is reached in which one of the spare area for recording and the defect list for recording the address of the defective block is almost exhausted, the address information of the defective block is received from the optical disk device together with the defect management error information, The host computer is provided with defect management means for performing defect management of the optical disk based on this information.

According to the optical disk device of the present invention, a defective block occurs during data recording or reproduction, and a spare area or a defective block address for recording replacement data of the defective block on the optical disk is set. When an error state occurs in which one of the recorded defect lists is almost exhausted, the defect management means provided in the host computer receives the defect management error information and the address information of the defective block from the optical disk device. In addition, the defect management of the optical disk is performed based on this information, and the recording or reproduction can be continued even when the optical disk is almost in an error state.

According to a seventh aspect of the present invention, in the optical disk device according to the sixth aspect, the defect management means in the host computer includes an address of a block in which a defect has occurred together with defect management error information from the optical disk device. When the information is received, the write data to the defective block is held in the substitute buffer memory of the host computer, and the defect list in which the address information of the defective block and the memory address information of the data of the substitute block held in the substitute buffer memory are registered. It is characterized in that it is created and defect management of the optical disc is performed.

According to the optical disk apparatus of the present invention, when the defect management means in the host computer receives the defect management error information and the address information of the block in which the defect has occurred from the optical disk apparatus, the defect management means transfers the defective block to the defective block. The write data is stored in the replacement buffer memory of the host computer, and a defect list is created in which the address information of the defective block and the memory address information of the data of the replacement block stored in the replacement buffer memory are created. Recording or reproduction can be continued even in the state.

According to an eighth aspect of the present invention, in the optical disk device according to the sixth aspect, the defect management means in the host computer includes an address of a block in which a defect has occurred together with defect management error information from the optical disk device. When the information is received, a defect list in which the address information of the defective block is registered is created, and the data of the defective block is designated to be written in a block next to the defective block.

According to the optical disk device of the present invention, when the defect management means of the host computer receives the defect management error information and the address information of the block in which the defect has occurred from the optical disk device, the defect management means of the defect block. A defect list in which the address information is registered is created, and the data of the defective block is designated to be written in the block next to the defective block, and is written and held, so that recording or reproduction is continued even when almost in an error state. can do.

According to a ninth aspect of the present invention, in the optical disk device according to the sixth aspect, the defect management means in the host computer is provided after completion of recording or reproduction of at least one continuous data. Alternatively, at the time of taking out the optical disk, the information of the defect list saved in the memory of the host computer or the replaced data is written into any one of the defect management area, the spare area, and the file system area of the optical disk.

According to the optical disk apparatus of the ninth aspect of the present invention, the defect management means in the host computer stores the memory of the host computer after the end of recording or reproduction of at least one continuous data or at the time of taking out the optical disk. Since the information of the defect list saved in the optical disk or the replaced data is written to any of the defect management area, the spare area, and the file system area of the optical disc, the recording or reproduction is continued even when almost an error occurs. can do.

[0045]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk device according to the present invention will be described below with reference to an embodiment.

FIG. 1 is a block diagram showing the configuration of an optical disk device according to an embodiment of the present invention.

In the optical disk device according to one embodiment of the present invention, the same components as those of the optical disk device shown in FIG. 6 are denoted by the same reference numerals, and description thereof will be omitted. RAM
A RAM 1 is provided in place of the RAM 76, and an alternative buffer memory 2 and a defect management error detecting means 3 are provided. The defect management error detecting means 3 includes a defective block occurrence detecting means 31 and a defective block address generating means 32.
And a spare area shortage detection unit 33 and a defect list shortage detection unit 34.

The replacement buffer memory 2 is used when the recording capacity of the spare area is almost completely used up by the recording of the replacement data, when a defective block is detected during continuous recording or during reproduction, and when the detected defective block is detected. Is to be temporarily stored prior to recording in the spare area, and is recorded in the spare area immediately after continuous recording or reproduction is completed or immediately before the optical disk 71 is taken out.

The RAM 1 stores a defect list 3 instead of the defect list 2. The defect list 3 is the defect list 2
In addition to the contents of (1), information indicating whether the generated defect is a newly generated defect, for example, 0h, and address information of the replacement buffer memory 2 storing data to be written to the newly generated defective block. Is stored.
Further, when a defect management error occurs in the RAM 1,
A defect list 3 ′ storing the defect list exceeding the storage capacity of the defect list 3, the physical address of the head sector of the defective block, the physical address of the head sector of the replaced block, and the like are formed.

In other words, in the optical disk device according to the embodiment of the present invention, when a defective block is detected by the defective block occurrence detecting means 31, for example, in the case of video recording of image data or the like by a video camera, etc. The physical address of the first sector is detected by the defective block address generation means 32, the shortage of the spare area is detected by the spare area shortage detection means 33, and the shortage of the defect list is detected by the defect list shortage detection means.

Even if the spare area or the defect list is almost exhausted by these detection means and a defect management error is detected, the defective block is stored in the memory 1 and the substitute buffer memory 2 in the optical disk device. The physical address of the first sector and the substitute data that should have been written to the newly generated defective block are kept evacuated, and recording or reproduction is continued.

Regarding the operation of the optical disk device according to the embodiment of the present invention, first, the storage contents of the defect list, and then the saving in the case of a defect management error will be described sequentially.

At the start of the operation, first, the information of the zone configuration table, the defect list 1 and the defect list 2 recorded on the optical disk 71 are stored in the RAMs 74, 75 and 1 of the optical disk device.
Respectively, the zone configuration table, the defect list 1, and the defect list 3
As evacuation.

The contents of the defect list 3 are as shown in FIG. The defect list 3 includes four items (1) to (4).

(1) SLR bit, a bit for indicating whether or not linear replacement is performed. 0h is the linear replacement, 1h is the other case, (2) the physical address of the leading sector of the defective block, (3) the physical address of the leading sector of the replaced block, and (4) the leading sector of the replaced block. Memory address.

0h is input for the unused items.
At the position of 0h, it is determined whether the contents of the defect list 2 are existing data or new data. Also SL
Based on the R bit, it is determined whether it is a linear replacement or a skip replacement.

Defect List 3 and Alternative Buffer Memory 2
The operation of writing to is as follows. A logical address is designated by the host computer constituting the data management part, a data write command is issued, and the data is written. At this time, the defect judgment of the written data is, for example, 1
It shall be performed in block units. This is because the signal processing in the optical disk device divides 16 sectors into one block (32K).
Byte) for error correction.

After recording in the write destination block, the data is reproduced, and the presence or absence of a defect is checked based on the number of error bytes in the block. A block having an error of a predetermined value or more is regarded as a defective block as an unreliable block, and is detected by the defective block occurrence detecting means 31.

When a defective block is detected, the physical address of the first sector of the defective block is detected by the defective block address detecting means 32 and added to the defect list 3 as the physical address of the first sector of the defective block. When performing a linear replacement, the defect list 3
Is set to 0h, and when skip replacement is performed, the SLR bit of the defect list 3 is set to 1h.

When performing linear replacement, an input / output buffer memory (8
From 4), the data to be recorded in the defective block is moved to the alternative buffer memory 2 and stored. Alternatively, the data of the defective block reproduced from the optical disk device may be transferred from the input / output buffer memory 77 in which the data is temporarily stored.
This is performed when a normal block is replaced before data in an unreliable block cannot be read. This data is not recorded in the spare area but is stored in the alternative buffer memory 2. The memory address of the first sector of the stored alternative data is added to the defect list 3.

When skip replacement is performed, the replacement data is recorded in a normal block next to the defective block. In this case, the substitute data is directly written on the optical disk 71 and is not stored in the substitute buffer memory 2. Only the address of the defective block is stored in the defect list.

This will be specifically described with reference to FIG. Defect registration numbers 1 and 3 are existing data, and defect registration number 2 is newly generated new data.

It is determined that the defect registration number 1 is existing data from the position of 0h, that the data of one block (A) is linearly replaced with the spare area (A '), and that each physical address is indicated. It is shown that the information is recorded on the optical disk 71.

Also in the case of the defect registration number 3, the last 0h determines that the data is existing data, and the SLR bit determines that the data is skip replacement, and the data of one block (C) is skip replacement ( C ′) indicates that the image has been skipped.

It is found from the SLR bit that the defect registration number 2 is a linear replacement, and furthermore, the physical address of the first sector of the newly generated defective block B from the position of 0h is the defect list. 3, the data that would have been recorded in the defective block B is stored in the replacement buffer memory 2, and the head address of the replacement buffer memory 2 at the time of the storage, that is, the memory address of the head sector of the replaced block Is stored as As described above, for the defect registration number 2, 0h indicates that the block is a newly generated defect block and that it has not yet been recorded on the disk 71 by light.

When the occurrence of a defective block is detected, whether or not the capacity of the defect list 2 becomes insufficient by registering the new defective block is detected from the registered number of the defect list 3 in the optical disk 71. Also, it is detected from the number of registrations in the defect lists 1 and 3 whether or not the capacity of the spare area is insufficient. If either of the capacities is exhausted and insufficient, it is determined as a defect management error. This is performed by the defect management error detecting means 3.

When a defect management error occurs, a portion of the defect list 3 which has exceeded the capacity is designated as a defect list 3 'in FIG.
The stored contents are the same as those of the defect list 3 as shown in FIG. The physical address of the first sector of the defective block is recorded in the defective block 3 '. When a defective block occurs during recording on the optical disk 71 or the like, linear replacement and skip replacement are performed as a defect compensation method.

In the linear replacement, data of a defective block is written as replacement data in a spare area. Since the recording is intermittently performed by moving the optical pickup, it is used for data recording of a computer. The skip replacement is a method in which data of a defective block is recorded in the next normal block, so that the movement of the pickup is reduced and the data is suitable for recording such as real-time video recording.

Next, a case where each of these replacement processes is performed will be described.

When performing the linear replacement, the data of the defective block is saved in the alternative buffer memory 2 and the address of the defective block is registered in the defect list. The alternative buffer memory 2 is, for example, a DR for error correction of a DVD signal processing circuit.
AM (up to 16 Mbit) can be used. Since one block is 2 kbytes, it is possible to store data of a considerable number of defective blocks.

At the time of data recording, the data of the defective block is moved from the input / output buffer memory 77 temporarily storing the data received from the host computer to the substitute buffer memory 2 and stored. Then, the physical address of the first sector of the defective block is recorded in the defect list 3 '.

At the time of data reproduction, the data of the defective block reproduced from the optical disk device is stored in the input / output buffer memory 77.
, The data is transferred to the alternative buffer memory 2. This is performed when a normal block is replaced before data of an unreliable defective block cannot be read. Although the spare area is already insufficient, recording can be continued by storing all data in the alternative buffer memory 2.

When skip replacement is performed, it is only necessary to register the address of the defective block in the defect list 3 and, when the defect list is exhausted, to the defect list 3 '.
The replacement data is recorded in a normal block next to the defective block. Therefore, the substitute data is directly written on the optical disk and is not stored in the substitute buffer memory 2. When performing the skip replacement, the SLR bits of the defect lists 3 and 3 'are set to "1".

Thus, storing the information of the defective block in the defect list and saving the alternative data in the alternative buffer memory 2 are completed.

The data stored in the alternative buffer memory 2 is stored in the file system of the optical disk 71 after the recording or the reproduction of the continuous data is completed, or when the optical disk 71 is taken out. Therefore, the contents of the defect list 3 'and the substitute data saved in the substitute buffer memory 2 are transferred to the host computer. Normally, when reading the contents of the optical disk 71 from an operating system or the like of the host computer, it is necessary to know the address of each file.

As one file system (ethical format standard) describing this file structure, UDF (Un
iversal Disk Format). A volume structure and a file structure are described in the UDF so that data can be read. In a DVD-RAM disk or the like, an unallocated space management function is added so that operations such as file change, addition, and deletion can be performed.

Using this function, unassigned (unused)
An area for storing the data of the substitute block is reserved for the required size in the space, and is allocated to the logical block.

In the case of linear replacement, the defect list 3 '
Is stored in the file system of the optical disk 71, and only the contents of the defect list 3 'are recorded in the file system of the optical disk 71 in the case of skip replacement.

As described above, according to the optical disk device of the embodiment of the present invention, the spare area or the defect list of the optical disk 71 is almost exhausted during continuous recording or reproduction, and a defect management error occurs. However, since information is continuously saved in the memory in the optical disk device, recording or reproduction can be continued.

Next, another optical disk device according to an embodiment of the present invention will be described.

FIG. 3 is a block diagram showing a system configuration of another optical disk device according to an embodiment of the present invention.

Another optical disk device according to an embodiment of the present invention comprises an optical disk device portion 70A and a data management system portion 80A.

The optical disk device portion 70A includes a defective block occurrence detecting device 31, a defective block address detecting device 32, a spare area shortage detecting device 33, and a defect list shortage detecting device 34 in the optical disk device portion 70A (see FIG. 6). Defect management error detection means 3 is provided.

The data management system section 80A includes a storage area 82 for storing the data management information of the data management system section 80 (see FIG. 6), an area 51 for storing the defect list 4, an alternative buffer memory area 52, and an address conversion section. An area 53 is formed. In FIG. 3, an area 51,
52 and 53 are displayed in the area 5. Hereinafter, area 5
1 is also referred to as a defect list 4 area 51.

The operation of another optical disk device according to an embodiment of the present invention will be described with reference to FIG. In this example, a case where both the spare area and the defect list for recording the address of the defective block are used up will be described.

First, the information of the defect list 2 of the optical disk is stored in the defect list area 51 by the optical disk apparatus.
(A). Next, the data management system 80
A designates a logical address, reads data to be written from the transfer buffer memory, and issues a logical address, data, and data write command to the optical disk device portion 70 (B). At this time, the data to be transferred is, for example, one block unit. This is because the signal processing of the optical disk device is 16 blocks and 1 block (32K bytes)
This is to correct the error.

In response to the logical address, the data, and the data write command, the optical disk unit 70 stores the data in the receive buffer 4 and records the data in the write destination block. Is checked by the defect error detecting means 3. A block having an error equal to or greater than a predetermined value is regarded as a defective block as an unreliable block.

When the occurrence of a defective block is detected, whether or not the capacity of the defect list 2 has been used up by registering the new defective block is detected from the registered number of the defect list 2 in the optical disk 71. Further, it is detected from the number of registrations in the defect list 1 and the defect list 2 whether or not the capacity of the spare area has been used up. If either capacity is exhausted, it is determined that a defect management error has occurred. This is performed by the defect management error detecting means 3.

When a defect management error occurs, the physical address of the first sector of the block is returned to the data management system 80A together with the error information (C). The data management system 80A adds the received physical address as a defective block to the defect list 4 (C1). If a defective block occurs during recording on the optical disk 71,
Linear replacement and skip replacement are performed as defect compensation methods.

The linear replacement writes the data of the defective block into the spare area as replacement data, and is a method used for data recording of a computer because recording is performed intermittently by movement of the optical pickup. The skip replacement is a method in which data of a defective block is recorded in the next normal block, so that the movement of the optical pickup is reduced and the data is suitable for recording such as real-time video recording. Hereinafter, a case where each of these replacement processes is performed will be described.

When performing the linear replacement, the data to be recorded in the defective block from the transfer buffer memory 5 of the data management system 80A is moved to the alternative buffer memory 52 and stored (C2). Alternatively, the data to be recorded in the defective block may be returned together with the error information from the optical disk device. At this time, this data is stored in the alternative buffer memory 52 of the data management system 80A (C3). The memory address of the first sector of the stored alternative data is added to the defect list 4 (C4).

When skip replacement is performed, the substitute data is recorded in a normal block next to the defective block.
The data management system 80A issues an instruction to start recording data in units of one block from the address of the first sector of the next block (D). Optical disk unit 70
In A, skip replacement is performed based on this instruction. If skip replacement is specified before continuous recording, the command D does not have to be transmitted every time.

After the end of the continuous data recording (video recording), the following data is stored in each of the alternate systems and the process ends (E).

First, in the case of the linear replacement, the data of the defect list 4 evacuated to the data management system 80A and exceeding the capacity of the defect list 2 and the data of the substitute buffer memory 52 are stored in the defect management area of the optical disk 71. The files having the same function are recorded in areas (defect list 2) managed by the file system.

In the case of the skip replacement, data exceeding the capacity of the defect list 2 in the information of the defect list 4 of the data management system 80A is managed by the file system as a file having the same function as the defect management area of the optical disk 71. Is recorded in the area to be recorded. At this time, the zone configuration table in the optical disk device is also corrected from the information of the defect list 4.

The contents of the defect list 4 are the same as those of the defect lists 3 and 3 'in FIG. The data of the defect list 4 that exceeds the capacity of the defect list 2 is the same as that of the defect list 3 '.

As described above, according to the other optical disk device according to the embodiment of the present invention, the spare area or the defect list of the optical disk 71 is almost exhausted during continuous recording or reproduction, and the defect management error is generated. , The information is continuously saved in the memory in the data management system 80A, so that the recording or the reproduction can be continued.

[0098]

As described above, according to the optical disk apparatus of the present invention, a spare area for recording replacement data of a defective block of an optical disk or a defect list for recording an address of a defective block during data recording or reproduction. Even when one of the two is exhausted, the information is kept stored in the memory of the optical disk device or the memory of the data management system while recording or reproducing at least one continuous data. The effect is obtained that the recording is interrupted or stopped due to the management error, and data such as important video images is not lost.

Further, according to the optical disk device of the present invention, the information stored in the memory of the optical disk device or the memory of the data management system is read after the end of the recording or reproduction of at least one continuous data, or after the removal of the optical disk. Sometimes, the data is written to the file system area of the optical disk via the data management system, so even if the capacity of the spare area or defect list specified by the physical standard of the optical disk is exceeded, the file system replaces the defective block replacement data or The effect is obtained that the defect management can be continued by managing the address of the defective block.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration of an optical disk device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a defect list 3 in the optical disk device according to the embodiment of the present invention.

FIG. 3 is a block diagram showing a system configuration of another optical disk device according to an embodiment of the present invention.

FIG. 4 is a schematic diagram for explaining defect management of another optical disk device according to an embodiment of the present invention.

FIG. 5 is a block diagram illustrating a hardware configuration of the optical disk device.

FIG. 6 is a block diagram showing a conventional system configuration of an optical disk device.

FIG. 7 is a schematic diagram for explaining each area of the optical disk;

FIG. 8 is a schematic diagram for explaining a zone configuration table.

FIG. 9 is a schematic diagram for explaining a defect list 1 and slip replacement.

FIG. 10 is a schematic diagram for explaining a defect list 2 and linear replacement and skip replacement.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Defect list 3 2 and 52 Alternative buffer memory 3 Defect management error detection means 31 Defective block occurrence detection means 32 Defective block address detection means 33 Spare area shortage detection means 34 Defect list shortage detection means 51 Defect list 4

Claims (9)

[Claims] In an optical disk apparatus having an optical disk defect management means, a defective block occurs on an optical disk during data recording or reproduction, and at least a spare area for recording replacement data of the defective block or an address of the defective block is recorded. When an error state occurs in which one of the defect lists is almost exhausted, while recording or reproducing at least one continuous data, the replacement data or the defective block of the defective block on the error side is used. An optical disk device wherein addresses are continuously stored in a memory of an optical disk device. 2. The optical disk device according to claim 1, wherein
After recording of at least one continuous data, when a defective block occurs on the optical disk during data recording or reproduction and the spare area on the inner and outer circumferences for recording the replacement data of the defective block is almost exhausted and an almost error state occurs. Alternatively, an optical disk device wherein an extended spare area is created on the outer peripheral side of the optical disk after reproduction is completed or when the optical disk is taken out, and information stored in a memory of the optical disk device is written. 3. The optical disk device according to claim 1, wherein
After the end of recording or reproduction of at least one continuous data, or at the time of taking out the optical disk, the host computer writes the information stored in the memory of the optical disk device to the area managed by the file system of the optical disk. An optical disk device for transmitting data. 4. In an optical disk apparatus having an optical disk defect management means, a defective block occurs on an optical disk during data recording or reproduction, and a spare area for recording alternative data of the defective block or a defect for recording an address of the defective block. When one of the lists becomes almost exhausted, the optical disk device transmits the defect management error information to the host computer together with the address of the block in which the defect has occurred. Optical disk device. 5. The optical disk device according to claim 4, wherein
An optical disk device wherein write data of a defective block is added together with defect management error information and transmitted to a host computer. 6. In an optical disk apparatus having an optical disk defect management means, a defective block occurs during data recording or reproduction, and a spare area for recording replacement data of the defective block in the optical disk or an address of the defective block is recorded. When an error state is reached in which one of the defect lists is almost exhausted, defect management is performed together with defect management error information and address information of a block in which a defect has occurred from the optical disk device, and defect management of the optical disk is performed based on this information. An optical disk device, wherein the means is provided in a host computer. 7. The optical disk device according to claim 6, wherein
The defect management means in the host computer, when receiving the address information of the block in which the defect has occurred together with the defect management error information from the optical disk device, holds the write data to the defective block in the substitute buffer memory of the host computer, and An optical disk device for creating a defect list in which address information and memory address information of data of a substitute block held in a substitute buffer memory are registered, and performs defect management of an optical disk. 8. The optical disk device according to claim 6, wherein
When receiving the defect management error information and the address information of the block in which the defect has occurred from the optical disk device, the defect management means in the host computer creates a defect list in which the address information of the defective block is registered, and stores the data of the defective block in the defective block An optical disk device characterized in that writing is designated in the next block of the optical disk. 9. The optical disk device according to claim 6, wherein
The defect management means in the host computer stores the information of the defect list saved in the memory of the host computer or replaced data at the end of recording or reproduction of at least one continuous data or at the time of taking out the optical disk, in the defect management area of the optical disk. An optical disk device for writing to any of a disk, a spare area, and a file system area.