KR20070010399A - Recording medium, defect management method and recording/reproducing method and apparatus thereof - Google Patents

Abstract

A recording medium, a defect management method in the recording medium, a recording and reproducing method for the recording medium, and an apparatus therefor are provided to efficiently record defect management information. A defect entry for defect management is recorded in a recording medium(S10,S20,S30). State information for discriminating whether a replacement block is valid is recorded in the defect entry(S40,S50). When the replacement block is valid, position information of a defective block and position information of a replacement block are recorded in the defect entry.

Description

Fault management method of recording medium and recording medium and recording and reproducing method and apparatus of recording medium {RECORDING MEDIUM, DEFECT MANAGEMENT METHOD AND RECORDING / REPRODUCING METHOD AND APPARATUS THEREOF}

1 illustrates a defect management method in a recording medium to which the present invention is applied.

2 shows an example of a defect entry as defect management information of the present invention.

Figure 3 shows an example of use utilizing the defect entry of the present invention.

4A-4B illustrate another example of use utilizing a defect entry of the present invention.

5 shows a recording medium recording and reproducing apparatus applicable to the present invention.

6 is a flowchart showing a recording medium recording and reproducing method and a defect management method applicable to the present invention.

-Description of the main parts in the drawing-

20: recording and playback section 11: pickup

12 control unit 13 signal processing unit

14: Servo 15: Memory

16: micom

The present invention relates to a recording medium, and more particularly, to a defect management method of a recording medium and a recording and reproducing method and apparatus of the recording medium using the same.

As a recording medium, an optical disc capable of recording a large amount of data is widely used. Recently, new high-density optical recording media capable of recording and storing high-definition video data and high-quality audio data for a long time, for example, HD-DVD (High Density DVD), have been developed.

HD-DVD, the next-generation optical recording media technology, is a next-generation optical recording solution that can store data that is significantly surpassing that of conventional DVDs. Recently, technical specifications of the world standard have been established.

In particular, in the case of a high density optical recording medium, there is a high possibility that defects occur in the data recording area due to scratching, contamination or repeated rewriting of the surface of the recording medium. Therefore, there is a need for a method of efficiently managing the defects in the recording medium, and many discussions are in progress.

The present invention was created in view of the above circumstances, and an object thereof is to provide an efficient defect management method of a recording medium.

It is also an object of the present invention to provide a recording and reproducing method and apparatus utilizing the defect management method in performing recording and / or reproduction on a recording medium.

It is also an object of the present invention to provide a structure of a recording medium capable of recording defect management information efficiently.

In order to achieve the above object, a defect management method of a recording medium according to the present invention performs a defect management operation of replacing a defective block with a replacement block, and includes a defect entry for the defect management in the recording medium. In the defect entry, status information for determining whether the replacement block is valid is recorded.

In addition, a defect management method of another recording medium according to the present invention performs a defect management operation of replacing a defective block with a replacement block, detecting the presence or absence of a defect in the replacement block, and if a defect exists in the replacement block, Position information of the replacement block and status information indicating that the replacement block is defective are recorded in a defect entry.

In addition, a defect management method of another recording medium according to the present invention performs a defect management operation of replacing a defective block in a user area with a first replacement block in a spare area, and performs a first defect entry ( entry) in a recording medium, in which the location information of the defective block and the location information of the first replacement block are recorded in the first defect entry, the presence or absence of a defect of the first replacement block is determined, and the first replacement is performed. If a defect exists in the block, a defect management operation of transferring data in the first replacement block to a second replacement block in the spare area is performed, and by the defect management operation, the defect management operation is performed in the first defect entry. Sets information indicating that the first replacement block is a defect, and records another second defect entry in the recording medium, wherein in the second defect entry, the position information of the defect block and the second replacement It characterized in that for recording the position information of the lock.

In addition, the recording medium according to the present invention includes a data area including a user area and a spare area, and a management area including a defect management area in which a defect entry is recorded as defect management information. And an area for recording state information for determining whether the replacement block is valid.

Further, the recording medium recording / reproducing method according to the present invention reads out the defect entry recorded in the defect management area, checks whether there is a defect in the replacement block from the state information in the defect entry, and replaces the replacement block determined as the defect. It is characterized by not performing the recording.

The recording medium recording and reproducing apparatus according to the present invention further includes a pickup section for reading out a defect entry recorded in the defect management area in the recording medium, and determining the presence or absence of a defect in the replacement block from the status information in the defect entry. The replacement block is determined to include a microcomputer to control the pickup so as not to perform the replacement recording.

Hereinafter, exemplary embodiments of a recording medium and a defect management method of the recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

In addition, the terminology used in the present invention was selected as a general term widely used as possible, but in some cases, the term is arbitrarily selected by the applicant, and in this case, the meaning is described in detail in the description of the present invention. The present invention is to be understood as the meaning of terms rather than names.

In the present invention, the term " recording medium " in the present invention refers to any medium on which data can be recorded, and encompasses all mediums regardless of a recording method such as an optical disc or a magnetic tape. Hereinafter, the present invention will be described using an optical disc, in particular, "HD-DVD" as a recording medium for convenience of explanation, but it will be apparent that the technical idea of the present invention is equally applicable to other recording media.

In addition, in the present invention, the term "defective area" means an area in which a defect is included in a recording medium. However, in the present invention, the cause of the defect is left out. Therefore, it is assumed that the determination of the "defective area" is made independently by the defect detection method provided for each optical recording / reproducing system.

In this regard, for example, a recording area in a recording medium forms a block as a specific recording unit and also performs defect management in units of blocks, so that the defective area is referred to as a "defective block." ) " Also, for example, in the case of HD-DVD, the block is referred to as a "PS block (Physical segment block)". However, it is obvious that the technical idea of the present invention is not limited thereto.

Further, in the present invention, " replacement area " means an area for alternately recording data recorded or to be recorded in the defect area. Generally, a spare area is provided in the recording medium, and the replacement recording is performed in the spare area in the spare area. In response to the "defective block", the "replacement block" may also be referred to as a "replacement block." In particular, a defect management method of replacing a defective area with a replacement area as described above is referred to as "linear replacement".

1 illustrates a defect management method in a recording medium to which the present invention is applied.

First, looking at the structure of the recording medium, the recording medium is divided into an inner area, a data area and an outer area from the inner circumference. In particular, the data area is divided into a user area in which actual user data is recorded and a spare area for defect management, and defect management information in an inner area and an outer area. There is provided a defect management area (DMA) for recording data. In relation to the present invention, for example, although the spare area is formed at the head and the rear end of the data area, the present invention is not limited to this.

In addition, DMA1 and DMA2 are provided in the inner area, and DMA3 and DMA4 are provided in the outer area. The information recorded in the DMA1 to DMA4 is the same information repeatedly recorded. This is to ensure the reliability of the DMA area. Hereinafter, each of DMA1 to DMA4 is collectively referred to as DMA.

That is, when a defect area is detected in the user area, a defect management operation of performing replacement recording on the spare area in the spare area is performed. In addition, the result of the defect management operation is recorded as defect management information in the DMA, which is referred to as a defect list (for example, SDL: Secondary Defect List). In particular, the defect list is composed of a set of defect entries. In the present invention, a defect entry is described as an SDL entry as an example. This will be described in detail as follows.

2 shows an example of a defect entry as defect management information of the present invention.

That is, for example, the defect entry of the present invention is composed of 8 bytes, and the defect entry includes position information of the defect area and position information of the replacement area, and state information indicating the state of the defect entry.

For example, the location information of the defective area is recorded in the "First PSN in the defective PS block" field. That is, the location information of the defective area is represented by the first PSN (Physical Sector Number) value present in the defective block. The PSN means an address of an allocated physical sector in the recording medium, and a block includes a plurality of sectors.

In addition, the position information of the replacement area is recorded in the "First PSN in the replacement PS block" field. That is, the location information of the spare area is represented by the first PSN (Physical Sector Number) value existing in the spare block.

In addition, the status information is classified into two types, one of which is information indicating whether or not the replacement recording is effectively performed by a defect management operation (eg, SLR), and the other is whether the replacement block is valid or not. Information that indicates (for example, SE).

That is, for example, if the 1-bit "Status of Linear Replacement" flag is "0b", it means that the data of the defective block is effectively replaced by the replacement block, and "1b". This means that the replacement record is invalid or no replacement record has been performed. Therefore, when the optical recording / reproducing apparatus reads out a defect entry having "SLR = 1b", the replacement area position information in the defect entry is ignored.

Also, for example, a 1-bit "Status of Entry" flag flag "0b" means that the replacement block written in the "First PSN in the replacement PS block" field in the defect entry is valid. "1b" indicates that the replacement block is invalid or defective. Therefore, when the optical recording / reproducing apparatus reads out a defect entry having "SE = 1b", it is determined that the replacement block in the defect entry is an invalid area.

Also, a "First PSN in the defective PS block" field, a "First PSN in the replacement PS block" field, a "Status of Linear Replacement" flag, and a "Status of Entry" (SE) in the defect entry. The remaining area except for the flag is left as a reserved area for future use.

In this regard, a defect management method using the defect entry will be described in detail below with reference to FIGS. 3 to 4B.

Figure 3 shows an example of use utilizing the defect entry of the present invention.

This example checks whether a defective block exists in the spare area by verifying the spare area, especially when formatting or re-formatting, and when the defective block exists, It is about registering as a defect entry in advance. Therefore, the location of the replacement area registered as a defect entry by this example will not be used as a replacement block in the future, thereby preventing an error that the replacement area in which the defect has occurred in the spare area is used as a replacement block. Will be.

In particular, Fig. 3 shows a case where B and D blocks among the A, B, C, and D blocks in the spare area are detected as defects, for example, by verification before recording and reproducing the recording medium. Therefore, a defect entry is generated for each of the B and D blocks identified as the defect area, and the generated defect entry is recorded in a defect list (e.g., SDL) in the DMA. In this regard, the illustrated "A1", "B1", "C1" and "D1" mean the first sector ("First PSN") of the A, B, C and D blocks, respectively.

That is, the "First PSN in the replacement PS block" field in the defect entry (SDL entry 1, SDL entry 2) records "B1" and "D1" values respectively representing the first sector in the B block and the D block. Since the "First PSN in the defective PS block" field is not a defective entry by the replacement recording, "00h" or dummy data is recorded. Also, the "Status of Linear Replacement" flag (SLR) records "1b" because no replacement is performed, and the "SE (Status of Entry)" flag indicates that the corresponding B and D blocks Since it is a defect, "1b" is recorded.

Thereafter, when certification is completed through registration of the defect entry as described above, recording or reproducing to the corresponding recording medium is performed. Therefore, if a defective block is detected in the user area during recording or playback, the B blocks and the D blocks in the spare area registered as the defective entry are excluded from the replacement block, and the remaining blocks are used as the replacement block.

4a to 4b illustrate another example of use utilizing the defect entry of the present invention.

This example is particularly concerned with registering each as a defect entry after writing the replacement block with another valid replacement block in the spare area, when the area in which the replacement block is effectively used is determined as a defective area later.

Regarding this, first, Fig. 4A shows a case where an alternative recording operation is effectively performed during recording or reproducing of a recording medium, and the result is registered as a defect entry. That is, a block (not shown) of the user area is replaced by A block of the spare area, and b block (not shown) of the user area is replaced by B block of the spare area. Therefore, each result of the valid substitution is recorded as a defect entry.

That is, the "First PSN in the defective PS block" field in the defect entry (SDL entry 1, SDL entry 2) records the "a1" and "b1" values, which mean the first sector in the a block and the b block, respectively. The "First PSN in the replacement PS block" field records "A1" and "B1" values, respectively, meaning the first sector in the A block and the B block. In addition, the "Status of Linear Replacement" flag (SLR) records "0b" because the replacement recording is validly performed, and the "SE (Status of Entry)" flag indicates that the corresponding A block and B block. Since it is not a defect, "0b" is recorded.

4B shows a case where the result is registered as a defect entry (SDL entry 2, SDL entry 3) when the B block is later found to be a defective area in the state of FIG. 4A. That is, although the b block (not shown) of the user area was originally replaced by the B block in the spare area, the b block (not shown) of the user area is replaced by another C block in the spare area as the B block is identified as the defective area. The replacement record has changed.

Therefore, the existing defect entry (SDL entry 2) should change only the "Status of Entry" flag from "0b" to "1b", and create a new defect entry (SDL entry 3).

That is, the "First PSN in the defective PS block" field in the new defect entry (SDL entry 3) records a "b1" value representing the first sector in the b block, and the "First PSN in the replacement PS block" field is C. The value " C1 " representing the first sector in the block is recorded. In addition, the "Status of Linear Replacement" flag (SLR) records "0b" because the replacement recording is valid, and the "SE (Status of Entry)" flag indicates that the corresponding A and C blocks Since it is not a defect, "0b" is recorded.

As described above, by utilizing the "Status of Entry" flag information in the defect entry, it is possible to easily check whether there is a defect in the replacement block.

5 shows a recording medium recording and reproducing apparatus to which the present invention is applicable, and the recording and reproducing apparatus is largely divided into a recording and reproducing unit 20 and a control unit 12. As shown in FIG.

The recording / reproducing section 20 includes a pickup section 11 for reading data and management information recorded on the optical disk or recording data and management information on the optical disk, and a servo controlling the operation of the pickup section 11. (14) demodulating the reproduction signal received from the pickup section 11 to a desired signal value, or modulating the signal to be recorded into a signal recorded on an optical disc and transferring the signal to the pickup section 11; A signal processor 13, a memory 15 for temporarily storing management information read out from the optical disc, and a microcomputer 16 for controlling the operation are basically configured. In particular, a product consisting of only the recording and reproducing section 20 is also referred to as a "drive."

In addition, the control unit 12 is an element for controlling the operation of the entire optical recording and reproducing apparatus, and receives a user command through an interface with the user, and transmits the user command to the microcomputer 16 in the recording and reproducing unit 20. As a control to perform the operation as it is, in particular, by using the disc management information transmitted from the recording and playback section 20 to generate a recording and playback command, it is delivered back to the recording and playback section 20.

In this regard, the AV decoder 17 finally decodes the output data under the control of the controller 12 and provides the same to the user. The AV encoder 18 controls the controller 12 to perform a function of recording a signal on the optical disc. The input signal is converted into a signal of a specific format, for example, MPEG2 (MPEG2) transport stream, and provided to the signal processing section 13 in the recording / reproducing section according to the control.

In relation to this, the recording and reproducing method and the defect management method using the recording and reproducing apparatus will be described in more detail with reference to FIG.

6 is a flowchart showing a recording medium recording and reproducing method and a defect management method applicable to the present invention.

In other words, it is checked whether a defective block exists in the user area during disc recording and reproducing (S10). If a defective block is detected, a linear replacement is performed with the replacement block in the spare area (S20), and a SDL entry is recorded in the DMA as the defect management information (S30). In this case, the defect entry has "SE flag = 0b" and "SLR flag = 0b" as the status information as described above because normal replacement is performed and there is no defect in the replacement block.

Thereafter, the disc recording / reproducing operation is continued, but if a defect is detected in a specific replacement block in the spare area (S40), it is registered as a defect entry (SDL entry) (S50). However, the registration method for the defect entry differs depending on the defect detection time of the replacement block, which has been described above with reference to FIGS. 3 and 4B.

That is, if the replacement block in which the defect is generated is a region that has not been previously used, a new defect entry is generated, and the defect entry has the form as shown in FIG. That is, in the new defect entry, the "First PSN in the replacement PS block" field records the first sector information in the replacement block in which the defect has occurred, and the "First PSN in the defective PS block" field indicates that the defect entry by replacement recording is Record as "00h". In addition, the "Status of Linear Replacement" flag in the new defect entry records "1b" because no replacement is performed, and the "Status of Entry" flag (SE) replaces the corresponding replacement. Since the block is defective, "1b" is recorded.

In addition, if the replacement block in which the defect has occurred is an area that has already been used as a replacement block, defect entry registration is performed in two steps, which are defect entries 2 and 3 (SDL entry 2 and SDL entry 3) of FIG. 4B. The same way as registration.

First, the existing defect entry should be changed to indicate that it has already been used as a substitute record. That is, by changing only the "Status of Entry" flag in the existing defect entry from "0b" to "1b", the replacement block recorded in the "First PSN in the replacement PS block" field in the defect entry is changed. Indicates that a fault has occurred.

Subsequently, a replacement recording should be made with a new replacement block in the spare area instead of the replacement block in which the defect has occurred, and a new defect entry for managing the registration is registered. In this case, the "First PSN in the defective PS block" field in the new defect entry records the first sector information of the defective block in the existing user area, and the "First PSN in the replacement PS block" field is replaced with the newly designated replacement area. Information indicating the first sector of the block is recorded. In addition, the "Status of Linear Replacement" flag in the new defect entry records "0b" because the replacement write is valid, and the "Status of Entry" flag (SE) replaces the new replacement. Since the block is not defective, it writes "0b".

As mentioned above, preferred embodiments of the present invention are disclosed for purposes of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The present invention provides an efficient defect management method for a recording medium and a recording and reproducing method and apparatus using the same, and through this, it is possible not only to manage defects of a unified recording medium, but also to efficiently cope with recording.

Claims (14)

In the defect management method of replacing a defective block with a replacement block, Recording a defect entry for the defect management in a recording medium, And recording state information for determining whether the replacement block is valid in the defect entry. The method of claim 1, And recording the location information of the defective block and the location information of the replacement block when the replacement block is valid in the defect entry. The method of claim 1, And another status information in which the replacement of the replacement block is valid is recorded in the defect entry. In the defect management method of replacing a defective block with a replacement block, Detecting the presence of a defect of the replacement block, And if there is a defect in the replacement block, recording position information of the replacement block and status information indicating that the replacement block is defective in a defect entry. The method of claim 4, wherein In the defect entry, when there is no defect in the replacement block, the location information of the defective block and the location information of the replacement block are recorded respectively. Perform a defect management operation of replacing a defective block in the user area with a first replacement block in the spare area, Recording a first defect entry by the defect management operation in a recording medium, in which the position information of the defect block and the position information of the first replacement block are recorded; Determining whether there is a defect in the first replacement block, and if a defect exists in the first replacement block, performing a defect management operation to transfer data in the first replacement block to a second replacement block in the spare area, By the defect management operation, information indicating that a first replacement block is a defect is set in the first defect entry, and another second defect entry is recorded in a recording medium, wherein the second defect entry is recorded in the recording medium. In the defect entry, the position information of the defective block and the position information of the second replacement block are recorded. The method of claim 6, And information indicating that there is no defect in the second replacement block is set in the second defect entry. A data area including a user area and a spare area; And a management area including a defect management area where defect entries are recorded as defect management information. And a region for recording state information for determining whether the replacement block is valid in the defect entry. The method of claim 8, And a region for recording the position information of the defective block in the user area and the position information of the replacement block in the spare area in the defect entry. The method of claim 9, And a region in the defect entry for recording status information for determining that the defective block has been effectively replaced with the replacement block. The method of claim 8, The defect entry includes eight bytes, and information for determining whether the replacement block is valid comprises one bit of flag information. Read defect entries recorded in the defect management area of the recording medium; Check the presence or absence of a replacement block from the state information in the defect entry, And a replacement recording is not performed on the replacement block determined as the defect. A pickup unit for reading out defect entries recorded in the defect management area in the recording medium; Recording / reproducing of the recording medium, characterized in that it is determined whether there is a defect in the replacement block from the state information in the defect entry, and the replacement block determined as the defect includes a microcomputer for controlling the pickup so as not to perform replacement recording. Device. Location information of the defect block, Location information of the replacement block, First status information indicating that a replacement write from the defective block to the replacement block is valid; And second status information indicating whether there is a defect of the replacement block.

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