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

• US 7,936,649 B2
• Filed: 10/28/2009
• Issued: 05/03/2011
• 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
• Application Number:
  US12/607,588
• Publication Number:
  US 20100046335A1
• Time in Patent Office: 552 Days
• Field of Search: None
• US Class Current: 369/47.13
• 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 device and method of reproducing and/or recording data onto a write once recording medium, the recording medium having a data area and a management area, the data area having a spare area. The recording method include: performing a replacement-recording by recording data requested to be recorded in a specified area onto a replacement area in the data area when the specified area is defective or contains data recorded thereon; and recording onto the management area a pair of consecutive entries for managing the replacement-recording when a size of the specified area corresponds to a plurality of consecutive recording-units. One of the pair of consecutive entries includes start address information of the specified area and start address information of the replacement area and another of the pair of consecutive entries includes end address information of the specified area and end address information of the replacement area.

Claims

1. An apparatus for recording data onto a write once recording medium, the recording medium having a data area and a management area, the data area having a spare area, the apparatus comprising:

a pickup configured to record the data onto the recording medium; and

a microcomputer configured to control the pickup,

wherein the microcomputer is further configured to perform a replacement-recording by controlling the pickup to record data requested to be recorded in a specified area onto a replacement area in the data area when the specified area is defective or contains data recorded thereon;

wherein the microcomputer is further configured to control the pickup to record onto the management area a pair of consecutive entries for managing the replacement-recording when a size of the specified area corresponds to a plurality of consecutive recording-units, and

wherein one of the pair of consecutive entries indicates a start position of the specified area and a start position of the replacement area,

wherein another one of the pair of consecutive entries indicates an end position of the specified area and an end position of the replacement area, and

wherein each of the pair of consecutive entries includes first status information indicating that the replacement-recording is performed and second status information indicating that the replacement-recording is performed for a plurality of consecutive recording-units.

2. The apparatus of claim 1,

wherein the microcomputer is configured to control the pickup to record onto the management area a single entry for managing the replacement-recording when the size of the specified area corresponds to one recording-unit, and

wherein the single entry includes first status information indicating that the replacement- recording is performed.

3. The apparatus of claim 2, wherein the first status information in the pair of consecutive entries has the same value as that of the single entry being recorded when the size of the specified area corresponds to the one recording-unit.

4. The apparatus of claim 3, wherein the single entry contains second status information indicating that the size of the specified area corresponds to the one recording-unit.

5. The apparatus of claim 4, wherein each recording-unit has a size of one cluster.

6. The apparatus of claim 5, further comprising:

a data processor configured to process a signal read/recorded from/onto the pickup; and

a servo configured to control the pickup to record/read the signal to/from the recording medium,

wherein the microcomputer is configured to further control the data processor and the servo,

wherein the microcomputer is configured to transfer, to the data processor and the servo, position information of the replacement area and the requested data when the specific area is defective or contains data recorded thereon so that the pickup records the requested data onto the replacement area, and

wherein the microcomputer is configured to record the pair of consecutive entries onto the management area when the size of the specified area corresponds to the plurality of consecutive recording-units, or to record the single entry onto the management area when the size of the specified area corresponds to the one recording-unit.

7. The apparatus of one of claims 6, further comprising:

a controller configured to transfer to the microcomputer a recording command requesting to record data onto the specified area,

wherein the microcomputer controls the servo and the data processor in response to the recording command from the controller.

8. An apparatus for reproducing data from a write once recording medium, the recording medium having a data area and a management area, the data area having a spare area, the apparatus comprising:

a pickup configured to reproduce the data from the recording medium; and

a microcomputer configured to control the pickup,

wherein the microcomputer is further configured to control the pickup to reproduce the data from a replacement area in place of a specified area requested by a reproducing command,

wherein the microcomputer is further configured to control the pickup to reproduce the data from the replacement area based on a pair of consecutive entries for managing the specified area when a size of the specified area corresponds to a plurality of consecutive recording-units, and

wherein one of the pair of consecutive entries indicates a start position of the specified area and a start position of the replacement area,

wherein another one of the pair of consecutive entries indicates an end position of the specified area and an end position of the replacement area, and

wherein each of the pair of consecutive entries includes first status information indicating that a replacement-recording is performed and second status information indicating that the replacement-recording is performed for a plurality of consecutive recording-units.

9. The apparatus of claim 8,

wherein the microcomputer is further configured to control the pickup to reproduce data from the replacement area based on a single entry for managing the specified area when the size of the specified area corresponds to one recording-unit, and

wherein the single entry includes first status information indicating that a replacement- recording for the specified area is performed and status information indicating that the size of the specified area corresponds to the one recording-unit.

10. The apparatus of claim 9, wherein the first status information in the pair of consecutive entries has a common value as a value of the single entry being recorded when the size of the specified area corresponds to the one recording-unit.

11. The apparatus of claim 10, further comprising:

a data processor configured to process a signal read from the pickup; and

a servo configured to control the pickup to accurately read the signal from the recording medium,

wherein the microcomputer is configured to control the data processor and the servo,

wherein the microcomputer is configured to transfer, to the data processor and the servo, position information of the replacement area having replaced the specified area based on the pair of consecutive entries when the size of the specified area corresponds to the plurality of consecutive recording-units so that the pickup reproduces data from the replacement area in place of the specified area, or to transfer, to the data processor and the servo, position information of the replacement area having replaced the specified area based on the single entry when the size of the specified area corresponds to the one recording-unit so that the pickup reproduces data from the replacement area in place of the specified area.

12. The apparatus of claim 11, further comprising:

a controller configured to transfer to the microcomputer the reproducing command requesting to reproduce data from the specified area,

wherein the microcomputer is configured to control the servo and the data processor in response to the reproducing command from the controller.

13. A method of recording data onto a write once recording medium, the recording medium having a data area and a management area, the data area having a spare area, the method comprising:

performing a replacement-recording by recording data requested to be recorded in a specified area onto a replacement area in the data area when the specified area is defective or contains data recorded thereon; and

recording onto the management area a pair of consecutive entries for managing the replacement-recording when a size of the specified area corresponds to a plurality of consecutive recording-units,

wherein one of the pair of consecutive entries indicates a start position of the specified area and a start position of the replacement area,

wherein another one of the pair of consecutive entries indicates an end position of the specified area and an end position of the replacement area, and

wherein each of the pair of consecutive entries includes first status information indicating that the replacement-recording is performed and second status information indicating that the replacement-recording is performed for a plurality of consecutive recording-units.

14. A method of reproducing data from a write once recording medium, the recording medium having a data area and a management area, the data area having a spare area, the method comprising:

reproducing data from a replacement area in place of a specific area requested by a reproducing command; and

reproducing data from the replacement area based on a pair of consecutive entries for managing the specified area when a size of the specified area corresponds to a plurality of consecutive recording-units,

wherein one of the pair of consecutive entries indicates a start position of the specified area and a start position of the replacement area,

wherein another one of the pair of consecutive entries indicates an end position of the specified area and an end position of the replacement area, and

wherein each of the pair of consecutive entries includes first status information indicating that a replacement-recording is performed and second status information indicating that the replacement-recording is performed for a plurality of consecutive recording-units.

15. A write once recording medium, comprising:

a data area including a spare area, the data area having an area usable as a replacement area onto which data requested to be recorded in a specified area is to be recorded when the specified area is defective or contains data recorded thereon; and

a management area for storing a pair of consecutive entries for managing the replacement area replacing the specified area when a size of the specified area corresponds to a plurality of consecutive recording-units,

wherein one of the pair of consecutive entries indicates a start position of the specified area and a start position of the replacement area,

wherein another one of the pair of consecutive entries indicates an end position of the specified area and an end position of the replacement area, and

wherein each of the pair of consecutive entries includes first status information indicating that a replacement-recording is performed and second status information indicating that the replacement-recording is performed for a plurality of consecutive recording-units.