Method of managing overwrite and method of recording management information on an optical disc write once

• US 7,668,054 B2
• Filed: 12/10/2003
• Issued: 02/23/2010
• Est. Priority Date: 12/11/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Sung Dae, Park, Yong Cheol
• Primary Examiner(s): Feild; Joseph H
• Assistant Examiner(s): GUPTA, PARUL H
• Application Number:
  US10/731,170
• Publication Number:
  US 20040120233A1
• Time in Patent Office: 2,267 Days
• Field of Search: None
• US Class Current: 369/47.14
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2020/10898 Overwriting or replacing recorded data
• CPC Class Codes: G11B 2020/10907 using pseudo-overwriting, i.e. virtually or logically overwriting data on WORM media by remapping recorded blocks to alternate areas
• CPC Class Codes: G11B 2020/1288 Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
• CPC Class Codes: G11B 2020/1873 Temporary defect structures for write-once discs, e.g. TDDS, TDMA or TDFL
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/218 Write-once discs
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs

Abstract

A method of managing overwrite and a method of recording management information on an optical disc write once can make it possible to perform a logical overwrite on the disc and thus heighten the use efficiency of the disc. The method includes replacement-recording data which is requested to be overwritten in a specified area of the disc where recording is completed in another data area physically separated from the specified area in the disc, and producing and recording management information for reproducing the physically replacement-recorded data.

Claims

1. A method of managing overwrite on an optical disc, the disc including a specified area having data written therein, the method comprising:

in response to a request that the specified area be overwritten, writing replacement-recording data associated with the specified area to a replacement area on the disc; and

recording management information for managing the replacement-recorded data,

wherein the management information includes first and second entries,

the first entry includes start address information of the specified area requested to be overwritten, and start address information of the replacement area corresponding to the specified area,

the second entry includes end address information of the specified area requested to be overwritten, and end address information of the replacement area corresponding to the specified area,

the first and second entries are consecutive entries, and

each of the first and second entries further includes status information for indicating whether the corresponding entry is either a leading entry or a following entry following the leading entry.

2. The method of claim 1, wherein the replacement area is located before an outer spare area among a data area of the disc.

3. The method of claim 1, wherein the replacement-recording data is consecutively replacement-recorded after a final data recording position among a data area of the disc.

4. The method of claim 1, wherein the replacement area is located in an overwrite area separately allocated in a data area of the disc.

5. The method of claim 1, wherein the replacement area is located in a spare area of the disc.

6. The method of claim 1, wherein the management information is recorded in a temporary defect management area of the disc.

10. The method according to claim 1, wherein the start address information and the end address information include first physical sector numbers (first PSNs).

13. The method according to claim 1, wherein the first entry is a single unit of information stored together in one location on the disc, and the second entry is another single unit of information stored together in another location on the disc, such that the entire entry is accessed at a time.

7. An apparatus for recording/reproducing an optical disc, the disc including a specified area having data written therein, the apparatus comprising:

a recording/reproducing device configured to, in response to a request that the specified area be overwritten, write replacement-recording data associated with the specified area to a replacement area on the disc, the recording/reproducing device further configured to record management information for managing the replacement-recorded data,

wherein the management information includes first and second entries,

the first entry includes start address information of the specified area requested to be Overwritten, and start address information of the replacement area corresponding to the specified area,

the second entry includes end address information of the specified area requested to be overwritten, and end address information of the replacement area corresponding to the specified area,

the first and second entries are consecutive entries, and

each of the first and second entries further includes status information for indicating whether the corresponding entry is either a leading entry or a following entry following the leading entry.

11. The apparatus according to claim 7, wherein the start address information and the end address information include first physical sector numbers (first PSNs).

14. The apparatus according to claim 7, wherein the first entry is a single unit of information stored together in one location on the disc, and the second entry is another single unit of information stored together in another location on the disc, such that the entire entry is accessed at a time.

8. A computer-readable recording medium comprising:

a data area including a specified area having data written therein, and a replacement area for writing replacement-recording data associated with the specified area in response to a request that the specified area be overwritten; and

at least one management area for storing management information associated with the replacement-recording data,

wherein the management information includes first and second entries,

the first entry includes start address information of the specified area requested to be overwritten, and start address information of the replacement area corresponding to the specified area,

the second entry includes end address information of the specified area requested to be overwritten, and end address information of the replacement area corresponding to the specified area,

the first and second entries are consecutive entries, and

each of the first and second entries further includes status information for indicating whether the corresponding entry is either a leading entry or a following entry following the leading entry.

9. The recording medium of claim 8, wherein the recording medium is a write once optical disc.

12. The recording medium according to claim 8, wherein the start address information and the end address information include first physical sector numbers (first PSNs).

15. The recording medium according to claim 8, wherein the first entry is a single unit of information stored together in one location on the disc, and the second entry is another single unit of information stored together in another location on the disc, such that the entire entry is accessed at a time.