JP2006114188A - Optical disk recording/reproducing system, and optical disk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk recording/reproducing apparatus and an optical disk medium which can read AVDP data favorably even if a defect is caused on a disk by preventing AVDP recording positions from being made adjacent to each other. <P>SOLUTION: The optical disk recording apparatus is characterized in that information on positional information of a file system is recorded at a position near the outermost circumference of a boarder area of a WO type optical disk with two or more recording layers. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dual-layer DVD-R disc recording system, and more particularly to a recording system that can prevent reliability deterioration due to scratches or the like by replacing the recording position of AVDP during multi-border recording.

  In recent years, development of high-density optical disks represented by DVD (Digital Versatile Disc) has progressed, and standardization has been promoted. As a result, UDF (Universal Disk Format) was established. A logical format according to the UDF is used for a read-only DVD-ROM or a writable DVD-R.

  The UDF is configured by a hierarchical file system, and sub-directories and substantive files are referred to from information stored in the root directory. The UDF is further referred to a sub directory or a substantial file from information stored in the sub directory. Hereinafter, the directory is abbreviated as “Dir.”.

That is, the recording area on the disc is accessed with the sector as the minimum unit, for example,
In the DVD-ROM, access is made from the inside to the outside of the disc. From the innermost side, a system area in which volume information is written is arranged following the lead-in area, and here, VRS (Volume Recognition Sequence), MVDS (Main Volume Descriptor Sequence), LVIS (Logical Volume Integrity Sequence) and AVDP (Anchor Volume Descriptor Pointer) is written.

  Route Dir. The position of the recording area where the file entry (File Entry, hereinafter abbreviated as “FE”) is written is recognized by sequentially referring to MVDS and FSD from AVDP.

  The FE includes file and directory attribute information and an allocation descriptor (hereinafter abbreviated as “AD”). AD is information on the logical address and size of a file or directory.

  Route Dir. Root of Dir. The logical address and size are indicated. Route Dir. Includes one or more file identifier descriptors (hereinafter abbreviated as “FID”), and the root Dir. The sub-Dir. FE and file FE are referenced. By these FEs, the corresponding sub-Dir. The file entity is referenced by each AD. Also, sub-Dir. The entity may further include one or more FIDs. That is, in the UDF, the root Dir. Other than the above, access is performed in the order of FID, FE, and entity using FID and FE as pointers. In UDF, the FID, FE, and entity may be written anywhere in the recordable area.

  For example, a lead-in area is arranged on the innermost circumference of the disk, and a system area is arranged on the outer circumference of the lead-in area. Route Dir. The entity is arranged outside the system area, for example.

  Route Dir. To sub-Dir. The case of accessing a file via the URL is as follows. That is, the route Dir. Based on the FID of the entity of the root Dir. Of the sub-Dir. FE is referenced. Further, sub-Dir. Based on AD of FE, sub-Dir. Sub-Dir. At an address away from the FE. The entity of is referenced.

  Similarly, sub-Dir. The FID of the entity of the sub-Dir. The FE of the file at an address distant from the entity of the file is referred to, and the entity of the file at the address distant from the FE of the file is referred to by the AD of the FE of the file.

  The AVDP is recorded in two or more locations of the sector of the logical address number 256, the sector of the final recording logical address N, and the sector of N-256. This assumes that the AVDP cannot be read due to a defect in the disk, and the same information is recorded in different locations.

When recording on a DVD-R disc, recording is performed so as to satisfy the above DVD-ROM regulations as much as possible in order to maintain reproduction compatibility with a DVD player.
In the DVD-R disc, there is a concept of R zone (RZone) and border (Border).

FIG. 5 schematically shows additional writing of information on the DVD-R disc. The recording area of the DVD-R disc is composed of an R information area 401 (denoted as R-Info.), A lead-in area 402 (Lead-In), and a data area 403 (Data) from the inner periphery to the outer periphery of the DVD-R disc. Area) and lead-out area 404 (Lead-Out).
R-Info. Is an area peculiar to the DVD-R disc, and is composed of a power calibration area 411 (Power Calibration Area, PCA) and a recording management area 412 (Recording Management Area, RMA).

  The data area 403 is an area where user data is recorded. The lead-in area 402 and the lead-out area 404 are buffer areas provided for an overrun of the recording / reproducing head when the data area 402 is accessed. A border-in area and a border-out area described later also function as buffer areas.

  Of the lead-in area 402, an area adjacent to the data area 403 is referred to as an extra border zone 421 (Extra-Border zone) and plays almost the same role as a border-in area (Border-In Area) described later.

Of the data area 403, an area not explicitly reserved is referred to as an invisible R zone. In a new DVD-R disc, the entire data area 403 is an invisible RZone.

  When an area for storing content to be recorded (for example, one music piece, one video drama, one computer data file, etc.) is reserved, an RZone is formed at the head of the Invisible RZone. Content data can be recorded in order from the top of the RZone.

If the size of the content is not known, it can be recorded in order from the beginning of the Invisible RZone.
In order to make a DVD-R disc on which content has been recorded ready to be played back by a DVD player, it is necessary to record the area including the area to be played back and the buffer areas on both sides thereof. This is because the DVD player generally cannot read the cutting information of the DVD-R disc, and reproduces the recorded data using only the pit information recorded on the land as a clue. For this purpose, if an unrecorded area remains in the reserved RZone, it is recorded with zero padding data (this is called closing of the RZone), and the extra border zone ( Alternatively, predetermined data is recorded in the border-in area and the border-out area (this is called border closing).
An area adjacent to the outside of the border-out area is left as a border-in area for user data to be recorded next. Therefore, the Invisible RZone starts from outside the border-in area. Here, the border-out area and border-in area adjacent to each other are collectively referred to as a border zone.

  Further, when content is added to a DVD-R disc, content data is recorded in order from the beginning of the Invisible RZone. When all the contents have been recorded on the DVD-R disc, the lead-out area is recorded in addition to the border closing described above (this is called finalization). No more data can be added to the finalized DVD-R disc.

  Now, the capacity that a user wants to record is increasing year by year, and the DVD-R having two recording layers is being developed to meet this demand. The recording area of the dual layer DVD-R disc is shown in FIG.

  In the first layer, Lead-Out is changed to Middle-Area for a single-layer DVD-R disc. The second layer has substantially the same structure as the first layer, but a lead-out is provided instead of the lead-in. The first layer is recorded from the inner peripheral side toward the outer peripheral side, and the second layer is recorded from the outer peripheral side toward the inner peripheral side.

  It is known that the recording characteristics of the second layer differ depending on whether the first layer is recorded or not recorded. Therefore, if the second layer recording is performed through the area where the first layer is recorded, there is no need to worry about the change in recording characteristics. At this time, as shown in FIG. 7, when the laser beam reaches the second layer through the first layer, the light beam is condensed and reaches, so that the second layer can be recorded with respect to the width of the area where the first layer is recorded. The width is narrow. This needs to be further narrowed in consideration of manufacturing errors in the first and second layers.

  If the second layer is recorded through the recorded area when the first layer is recorded to some extent, as shown in FIG. 7, both the first and second layers can be recorded from the inner peripheral side, which increases convenience. In FIG. 7, recording is performed in the direction of the arrow in order from 1) to 6).

FIG. 8 shows an example of recording on a dual-layer DVD-R disc with a plurality of borders. At this time, the AVDP is recorded at positions 801 to 806 in the drawing.
JP 2002-352518 A

When reproducing a dual-layer DVD-R disc recorded with a plurality of borders as shown in FIG. 8, there are the following two problems.
1. When the host device accesses the AVDP, the contents of the sector at any one of positions 801 to 803 in FIG. 8 are read, but what is originally desired to be read is border information 804 to 806 recorded later.

  2. In many cases, 801 to 803 and 804 to 806 in FIG. 8 are recorded at positions extremely adjacent to the disk radial position. If a disc defect occurs in the vicinity of S + 256, all AVDPs 804 to 806 may be unreadable, so there is no point in providing a plurality of recording positions.

  The present invention has been made for the purpose of solving these problems.

In order to solve the above problems, the present invention provides the following apparatus and recording medium.
(1) An optical disc recording apparatus for recording information related to position information of a file system at a position near the outermost periphery of a border area of a write-once optical disc having a plurality of recording layers.
(2) Information related to the position information of the file system is recorded at a position near the outermost periphery of the border area of a write-once optical disc having a plurality of recording layers, and the file system within the border in the border-in area and the border-out area. An optical disk recording apparatus for recording information relating to a position where information relating to the position information is recorded.
(3) An optical disk reproducing apparatus for reproducing a disk recorded by the optical disk recording apparatus according to (1), wherein a command for reading out information related to position information of a file system recorded at another position from a higher-level apparatus An optical disc reproducing apparatus which, when received, reads out information recorded at other positions or reads out information related to position information of a file system recorded at a position near the outermost periphery of the border area.
(4) An optical disk reproducing apparatus for reproducing a disk recorded by the optical disk recording apparatus according to (2), wherein a command for reading information related to position information of a file system recorded at another position is received from a host device. When receiving, read the information related to the position where the information related to the position information of the file system is recorded in the border recorded in the border-in area or the border-out area of the outermost border, and the data of the position of the information Alternatively, an optical disk reproducing apparatus that reads information related to position information of a file system recorded at a position near the outermost periphery of the border.
(5) The optical disk recording apparatus according to (1) or (2), wherein a position near the outermost periphery is a border-out area.
(6) The optical disk reproducing apparatus according to (3) or (4), wherein a position near the outermost periphery is a border-out area.
(7) A write-once optical disc having a plurality of recording layers recorded by the optical disc recording apparatus according to (1), (2) or (5).

  According to the present invention, since a copy of the AVDP information is recorded on the border-out, it is recorded at a location separated from the other sector in which the AVDP is recorded at the radial position of the DVD-R disc. Increases resistance to scratches.

  Further, according to the present invention, when a DVD-R disc has a plurality of borders, when a read command for logical addresses 256, N, and N-256 is received from the host device, a predetermined position of the outermost border is obtained. The AVDP recorded in the border or the AVDP copy recorded in the border-out area of the border is sent to the host device, so that the host device can obtain AVDP without being aware of the existence of multiple borders. There is convenience.

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

A first embodiment will be described with reference to the drawings.
FIG. 1 is a configuration example of a system 700 according to an embodiment of the present invention. The system 700 includes a host device 1, an optical disc device 2 (recording device), and a DVD-R disc 3 having two recording layers. The host device 1 instructs the optical disc device 2 to record or reproduce the DVD-R disc 3. The host device 1 is, for example, a personal computer.

  The host device 1 and the optical disk device 2 may be housed in the same housing. Such a form is employed in an optical disc recorder, for example. The DVD-R disk 3 is mounted on the optical disk device 2.

  The optical disk apparatus 2 includes a microcomputer 4 that controls the entire apparatus, a recording / reproducing circuit 5 that records and reproduces data on the DVD-R disk 3, a program memory 6 that stores a control program for the microcomputer 4, and a DVD-R disk. 3 includes a DRAM 7 that temporarily holds data to be recorded and reproduced, and an internal bus 8 that connects these components.

The recording / reproducing circuit 5 functions as a recording means for recording management information on the DVD-R disc 3 (information recording medium having a plurality of recording layers).
FIG. 2 shows a part of the area of the DVD-R disc 3 having two recording layers.

FIG. 3 illustrates the operation of the optical disc apparatus 2 of FIG.
FIG. 4 shows a part of data recorded in the border-out area and the border-in area of the DVD-R disc 3.

  FIG. 3A shows the operation of the optical disc apparatus 2 when a command for closing the first border on the innermost circumference is received from the host apparatus 1. The optical disk device 2 sets the recorded data with zero padding data if an unrecorded area remains in the reserved RZone. Next, the sector of the logical address number 256 of the DVD-R disc, the sector of the final recording logical address N, and the sector of N-256 are read to obtain AVDP information. Predetermined data is recorded in the extra border zone and the border-out area so as to sandwich the recorded RZone. At that time, the previously read AVDP information is added to a part of the data to be recorded in the border-out area and recorded.

  The state after recording is shown in FIG. A part of the recorded border-out content is shown in FIG. A copy of the contents of AVDP is stored at the position of Unit Position 6.

Next, data is recorded on the second border by a command from the host device 1. At this time, the new AVDP is selected from the sector of S + 256, the sector of the final recording logical address M of the second border, and the sector of M-256 with respect to the leading logical address S of the data area of the second border. Record in two or more sectors.

FIG. 3 (2) shows the operation of the optical disc apparatus 2 when the next instruction for closing the second border is received from the host apparatus 1. The optical disk device 2 sets the recorded data with zero padding data if an unrecorded area remains in the reserved RZone. Next, the sector of the logical address S + 256 in which the AVDP of the second border is stored, the sector of the logical address M, and the sector of M-256 are read to obtain AVDP information. Predetermined data is recorded in the border-in area and the border-out area so as to sandwich the recorded RZone. At that time, the previously read AVDP information is added to a part of the data to be recorded in the border-out area and recorded. Further, a part of data to be recorded in the border-in area and the border-out area is recorded by adding logical addresses S + 256, M, and M-256 in which AVDP is recorded.

  The state after recording is shown in FIG. Part of the recorded border-out content is shown in FIG. A copy of the contents of AVDP is stored at the position of Unit Position 6. Further, logical positions S + 256, M, and M-256 are stored at the positions of unit positions 5 and 100. In FIG. 4 (2), a border-in is arranged subsequent to a border-out. However, a border-in and border-out pair of one border is a border-in of the border and a border-out of the outer periphery. 4 (2), the border-in is recorded on the inner periphery of the border.

  Next, the DVD-R disc recorded as described above is taken out from the optical disc apparatus 2 and mounted on the optical disc apparatus 2 or another optical disc apparatus 2 again to reproduce the recorded data. Will be explained.

  FIG. 3 (3) shows the operation of the optical disc apparatus 2 when reproducing the DVD-R disc taken out in the state of FIG. 2 (1). When receiving a command for reading the logical address 256 from the host device 1, the optical disc device 2 reproduces the recording data at the logical address 256. If the reproduced data is error-detected and decoded and it is determined that there is no error, the data is sent to the host device 1. If it is determined that there is an error, the recorded data at the logical address N is reproduced and the presence / absence of an error is similarly determined. If there is an error, N-256 recorded data is reproduced. When it is determined that all of the above are errors, an AVDP copy in the border-out area 201 in FIG. Since the border-out area 201 is located away from the logical addresses 256, N, and N-256 at the radial position of the DVD-R disc, all of the logical addresses 256, N, and N-256 are determined to have errors. Even in this case, there is a high possibility that it can be reproduced without error.

FIG. 3 (4) shows the operation of the optical disc apparatus 2 when reproducing the DVD-R disc taken out in the state of FIG. 2 (2). When an instruction to read the logical address 256 is received from the host device 1, the optical disc device 2 determines that there is a second border and reproduces the data of the unit position 100 in the border-in area 202 of the second border. . If the reproduced data is error-detected and decoded, and it is determined that there is an error, the data of Unit Position 5 in the border-out area 203 of the second border is further reproduced. The data having no error is adopted in the reproduced data, and the logical addresses S + 256, M and M-256 stored therein are obtained. Next, the optical disc apparatus 2 reproduces the recording data of the area logical address S + 256. If the reproduced data is error-detected and decoded and it is determined that there is no error, the data is sent to the host device 1. If it is determined that there is an error, the recorded data at the logical address M is reproduced and the presence / absence of an error is similarly determined. If it is incorrect,
The recorded data of M-256 is reproduced. When it is determined that all of the above are errors, an AVDP copy in the border-out area 203 in FIG. Since the border-out area 203 is located away from the logical addresses S + 256, M, and M-256 at the radial position of the DVD-R disc, all of the logical addresses S + 256, M, and M-256 are determined to have errors. Even in this case, there is a high possibility that it can be reproduced without error.

  In this embodiment, a copy of the AVDP information is recorded in the border-out area. However, the present invention is not limited to this. For example, a special area is provided in the border near the outermost periphery. And may be recorded there.

It is a system configuration figure of one example of the present invention. It is the figure which showed a part of area | region of the dual layer DVD-R disc of this invention. It is a figure explaining operation | movement of one Example of this invention. It is the figure which showed a part of data recorded on the border-out area | region of the 2 layer DVD-R disc of this invention, and a border-in area | region. It is the figure which showed typically the additional writing of the information in the conventional DVD-R disc. It is the figure which showed the recording area of the conventional 2 layer DVD-R disc. It is the figure which showed a mode that it recorded on the conventional 2 layer DVD-R disc. It is a figure which shows the example at the time of recording on a 2 layer DVD-R disc with a some border.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High-order apparatus 2 Optical disk apparatus 3 DVD-R disk 4 Microcomputer 5 Recording / reproducing circuit 6 Program memory 7 DRAM
8 Internal bus

Claims (7)

  An optical disk recording apparatus for recording information relating to position information of a file system at a position near the outermost periphery of a border area of a write-once optical disk having a plurality of recording layers.   The information related to the position information of the file system is recorded in the vicinity of the outermost periphery of the border area of the write-once type optical disc having a plurality of recording layers. An optical disc recording apparatus for recording information relating to a position where the information relating to is recorded.   2. An optical disk reproducing apparatus for reproducing a disk recorded by the optical disk recording apparatus according to claim 1, wherein a command for reading information related to position information of a file system recorded at another position is received from a host apparatus. In addition, the optical disk reproducing apparatus is characterized in that information recorded at other positions is read or information relating to position information of the file system recorded at a position near the outermost periphery of the border area is read.   3. An optical disk reproducing apparatus for reproducing a disk recorded by the optical disk recording apparatus according to claim 2, wherein a command for reading information relating to position information of a file system recorded at another position is received from a host apparatus. Next, by reading the information related to the position where the information related to the position information of the file system is recorded in the border recorded in the border-in area or the border-out area of the outermost border, the position data of the information or the An optical disk reproducing apparatus, wherein information relating to position information of a file system recorded at a position near the outermost periphery of a border is read.   The optical disk recording apparatus according to claim 1 or 2, wherein a position near the outermost periphery is a border-out area.   5. The optical disk reproducing apparatus according to claim 3, wherein a position near the outermost periphery is a border-out area. 6. A write-once optical disc having a plurality of recording layers recorded by the optical disc recording apparatus according to claim 1, 2 or 5.

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