JP2007265462A - File management system and method for large-capacity optical recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a file management system for a large-capacity optical recording medium capable of storing a plurality of contents on one and the same disk by making a logical address start point on an optical disk changeable. <P>SOLUTION: An optical recording medium has a content management information recording area for recording content management information; management information of a plurality of contents is recorded in the content management information recording area; the content management information includes a content identifier showing that this is content management information, the total number of contents, and the content name, content leading physical sector address and a content end physical sector address of every content, and the content first physical sector address is made the logical address of the content = 0. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a file management system for a large-capacity optical recording medium suitable for application to a high-density, large-capacity optical disk.

  FIG. 1 shows a content recording state in a conventional optical disc. Each optical disc stores one content, and file management information for each content is recorded.

  Incidentally, in recent years, high-density and large-capacity optical disk recording media represented by HD DVD have been developed. Since these next-generation optical disks have a high density and a large capacity, a plurality of contents can be recorded as a recording capacity.

In addition, a file management area corresponding to a plurality of file systems or OS is provided in the ROM area of the information recording medium, and the file corresponding to the file management information written in one of these file management areas is filed by the OS. When management is performed, an address from a physical sector address (PSN) to a logical address so that the logical address (LBA: Logical Block Address) of the file management area is set to “000”. There is a disk recording medium for conversion (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 8-272541

  However, in the conventional optical disk, since one content is normally stored in one disk, the outer peripheral disk capacity cannot be effectively utilized when the content capacity is small.

  In the conventional optical disc, since the position of the file management information is fixed, it is difficult to store the independent content on one optical disc when creating content accessible by the existing file system. . In addition, when contents stored in a plurality of media are to be combined into one medium, it is necessary to reconfigure the contents.

  In addition, in a file system used for an optical disk, a logical address serving as a reference for storing file information is fixed, and when recording fails, even if there is an unused area on the outer periphery, the area is effectively used. I couldn't.

  Therefore, the present invention provides a file management system and method for a large-capacity optical recording medium capable of storing a plurality of contents on the same disc by enabling the change of the logical address start point on the optical disc in a large-capacity optical disc recording / reproducing apparatus. The purpose is to provide.

  In order to solve the above-described problems, the present invention provides a content management information recording area for recording content management information on an optical disc recording medium, and records the management information of a plurality of contents in the content management information recording area. The information includes a content identifier indicating content management information, a total number of contents, a content name for each content, a content head physical sector address, and a content last physical sector address. The content head physical sector address is the logical address of the content. The address = 0.

  With the above configuration, the logical address start position on the disk can be dynamically changed, and one medium can be used like a plurality of media.

  In the present invention, the file management information to be allocated to the fixed logical address is changed to the file system by making the relationship between the logical address and the physical sector address fixedly assigned in a one-to-one relationship relative to each other. It is possible to switch on a single optical disk without adding

  Further, when a new large-capacity optical disk is produced, a plurality of past optical disk contents can be stored and used in one new large-capacity optical disk without changing the data structure.

  The first effect of the present invention is that a plurality of contents can be stored on one optical disk.

  The second effect is that, since the relationship between the logical address and the physical sector address is relative, when recording fails, the optical disk can be used to avoid the failed part.

  Next, the best mode of the present invention will be described with reference to the drawings.

  FIG. 2A shows a content recording state of the optical disc according to the present invention. A content management information recording area for recording management information of the content to be recorded is provided, and management information of the contents 1 and 2 is recorded in the content management information recording area.

  FIG. 2B shows a state in which the content 1 is an access target, and the top PSN of the content 1 is set to LBA = 0. Content 1 file management information is recorded in the first area of the LBA.

  FIG. 2C shows a state where the content 2 is an access target, and the top PSN of the content 2 is set to LBA = 0. Content 2 file management information is recorded in the first area of the LBA.

  FIG. 3 is a system configuration diagram for carrying out the present invention. This system controls an optical disc 1 by controlling an optical disc 1 capable of recording a plurality of contents, an optical disc recording / reproducing drive 2 in which an optical disc 1 can be inserted and reading / writing information on the optical disc 1, and an optical disc recording / reproducing drive 2. The control computer 3 is configured to reproduce the above arbitrary content or record the arbitrary content on the optical disc 1 and the bus 4 that connects the optical disc recording drive 2 and the control computer 3 to enable information transmission.

  The optical disc 1 stores (or can store) a plurality of contents, and is provided with a contents management information recording area for recording contents management information. The content management information includes a content identifier indicating content management information, a total number of contents, a content name (label), a genre, a content top PSN (a PSN value with LBA = 0), and a content final PSN. The content name (label), genre, content start PSN, and content final PSN are set for each content.

  The optical disc recording / reproducing drive 2 can insert the optical disc 1 and is connected to the control computer 3 via the bus 4. Further, it has a function of reading data from the optical disc 1, a function of recording data, and a communication function with the control computer 3. When the optical disc 1 is inserted, the optical disc recording / reproducing drive 2 acquires the content management information, file management information, recording status of the disc, etc. of the optical disc 1 and sends these information to the bus 4 in response to a request from the control computer 3. Notify through.

  The control computer 3 designates the desired content on the optical disc 1 based on the information obtained from the optical disc recording / reproducing drive 2, and instructs the optical disc recording / reproducing drive 2 to read out the content data at the time of reproduction. Get content data via Further, when recording the content, the control computer 3 instructs the optical disc recording / reproduction drive 2 to record via the bus 4 and transmits the content data to record the content on the optical disc 1.

  As an application of recording of a plurality of contents on an optical disc, content data having the same content can be recorded as two contents in different areas to obtain duplicate data. When the optical disc on which the content is recorded cannot be read due to scratches or the like, the same content data recorded in the other area can be read, and the reliability can be improved.

  In this case, by adding data indicating that it is a duplex data recording medium to the content identifier, even if reading of one of the duplex data fails when the disk is read by the drive device, The other data can be read. It is also possible to verify the reliability of the recording medium by reading the paired duplex data and comparing them to determine whether they are the same.

  FIG. 4 is a sequence diagram showing the operation of the system configured as described above.

  When the optical disc 1 is inserted into the optical disc recording / reproducing drive 2, the optical disc recording / reproducing drive 2 acquires the content management information, file management information, recording status of the disc, etc. of the optical disc 1, and prepares for insertion and recording / reproducing of the optical disc 1. Is notified to the control computer 3 (S1).

  When notified that the optical disc 1 has been inserted, the control computer 3 requests the optical disc recording / reproducing drive 2 for information necessary to reflect the user's request to the optical disc 1 (S2).

  The optical disc recording / reproducing drive 2 collects necessary information from the optical disc 1 and notifies the result to the control computer 3 (S3). Based on this information, the control computer 3 recognizes that the optical disc 1 is a disc having a plurality of contents, the number of contents, and the like (S4).

  The control computer 3 requests the content management information of the optical disc 1 from the optical disc recording / reproducing drive 2 (S5).

  The optical disc recording / reproducing drive 2 collects content management information from the optical disc 1 and notifies the control computer 3 of the result (S6).

  The control computer 3 selects content to be accessed from the notified content management information (S7).

  The control computer 3 accesses the access target content (S9) by designating the LBA start PSN of the selected content to the optical disc recording / reproducing drive 2 (S8).

  FIG. 5 shows an example in which two contents are recorded using DVD-R as an example. In DVD-R, content management information is recorded in RMD (Recording Management Data).

  (A) First, in order to record content 1 on an unrecorded DVD-R, a leading PSN that sets LBA = 0 is set.

  (B) The content 1 data is recorded in the set recording area, and the content management information of the content 1 (total content, content name, top PSN, final PSN, etc.) is recorded in the RMD.

  (C) When recording the content 2, the DVD-R on which the content 1 is recorded is recognized by the control computer as an unrecorded disc with a capacity reduced by one content. In order to record new content 2 on this partially recorded disc, the position of the leading PSN where LBA = 0 is set is shifted.

  (D) The content 2 data is recorded in the set recording area, 1 is added to the total content, and content management information of the content 2 (total content, content name, top PSN, final PSN, etc.) is added to the RMD.

  FIG. 6 shows an example in which a DVD-R is read from a recording medium on which two contents are recorded.

  (A) First, the number of contents recorded from the RMD is determined. The control computer acquires the number of contents recorded on the DVD-R and its contents by a command. The content to be read by user operation is notified to the drive by a command.

  (B) When content 1 is designated, the top PSN of content 1 is LBA = 0, and the access area is limited from the top PSN of content 1 to the final PSN. Therefore, the disc is recognized as a disc on which only the content 1 is recorded from the control computer.

  (C) When content 2 is designated, the top PSN of content 2 is LBA = 0, and the access area is limited from the top PSN of content 2 to the final PSN. For this reason, the disc is recognized as a disc on which only the content 2 is recorded from the control computer.

  The present invention can be used for all large-capacity optical discs. For example, any type such as a read-only type, a write-once type, and a rewritable type may be used. Also, the content to be recorded may be any content such as computer data and video content.

It is a figure which shows the content recording state in the conventional optical disk. It is a figure which shows the content recording state of the optical disk by this invention. 1 is a system configuration diagram for carrying out the present invention. It is a sequence diagram which shows operation | movement of the system by this invention. It is a figure which shows the example which records two contents on DVD-R. It is a figure which shows the example which reads two content from DVD-R.

Explanation of symbols

1 optical disk 2 optical disk recording / reproducing drive 3 control computer 4 bus

Claims (9)

A content management information recording area for recording content management information on an optical disc recording medium is provided,
A file management system for a large-capacity optical recording medium, wherein management information for a plurality of contents is recorded in the content management information recording area. The content management information includes a content identifier indicating content management information, a total number of content, a content name for each content, a content start physical sector address, and a content final physical sector address.
2. The file management system for a large-capacity optical recording medium according to claim 1, wherein the content start physical sector address is set to the logical address of the content = 0.   When recording new content on the optical disk recording medium, 1 is added to the total number of contents, and a new content start physical sector address and content final physical sector address are set in an empty area of the optical disk recording medium. The file management system for a large-capacity optical recording medium according to claim 2.   2. The file management system for a large-capacity optical recording medium according to claim 1, wherein content data having the same content is recorded as two contents in different areas on the optical disc recording medium to obtain duplicate data. A content management information recording area for recording content management information on an optical disc recording medium is provided,
A file management method for a large-capacity optical recording medium, wherein management information for a plurality of contents is recorded in the content management information recording area. The content management information includes a content identifier indicating content management information, a total number of content, a content name for each content, a content start physical sector address, and a content final physical sector address.
6. The file management method for a large-capacity optical recording medium according to claim 5, wherein the content start physical sector address is set to the logical address of the content = 0.   When recording new content on the optical disk recording medium, 1 is added to the total number of contents, and a new content start physical sector address and content final physical sector address are set in an empty area of the optical disk recording medium. A file management method for a large-capacity optical recording medium according to claim 6.   6. The method of managing a file on a large-capacity optical recording medium according to claim 5, wherein content data having the same content is recorded as two contents in different areas on the optical disc recording medium to form duplex data. A content management information recording area for recording management information of a plurality of contents is provided,
The content management information includes a content identifier indicating content management information, a total number of contents, a content name for each content, a content start physical sector address, and a content end physical sector address. .

Images