Method and apparatus for managing a overwrite recording on optical disc write once

• US 8,223,607 B2
• Filed: 07/05/2004
• Issued: 07/17/2012
• Est. Priority Date: 07/04/2003
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Yong Cheol
• Primary Examiner(s): Young, Wayne
• Assistant Examiner(s): Pendleton, Dionne
• Application Number:
  US10/563,154
• Publication Number:
  US 20060171271A1
• Time in Patent Office: 2,934 Days
• Field of Search: 369/47.13, 369/53.17
• US Class Current: 369/53.17
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• 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 2220/216 Rewritable discs
• CPC Class Codes: G11B 2220/218 Write-once discs
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/036 Insert-editing
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 7/006 Overwriting G11B7/0065 takes precedence

Abstract

The present invention provides an overwrite method of a write-once optical disc and apparatus thereof, by which a logical overwrite is enabled by varying an overwrite system according to a recording mode to enhance efficiency of disc use. The present invention includes the step of performing a replacement recording on a data area within the optical disc with overwrite-requested data in a specific recording-completed area within the optical disc in a sequential recording mode (SRM) wherein a logical overwrite is executed to maintain continuity of a user data area by the replacement recording. And, the present invention includes the step of performing a replacement recording on a spare area within the optical disc with overwrite-requested data in a specific recording-completed area within the optical disc in a random recording mode (RRM) wherein a size of the spare area for allocation is determined on disc initialization for the replacement recording.

Claims

1. An overwrite method of an optical disc, comprising the steps of:

confirming whether a recording mode applied to the optical disc is a sequential recording mode by reading recording mode information recorded in a temporary management area of the optical disc, in which data is recorded sequentially onto sequential recording ranges allocated to a data area of the optical disc, wherein each of the sequential recording ranges is one of an open sequential recording range having a next writable area or a closed sequential recording range having no writable area;

performing an overwrite for an overwrite-requested data onto a replacement recording area,

wherein if the overwrite is requested in an open sequential recording range, a next writable area within the open sequential recording range is identified as the replacement recording area.

2. The overwrite method of claim 1, further comprising;

recording, after performing an overwrite, location information of the replacement recorded area as management information.

3. The method of claim 2, wherein the recording step records the location information in a temporary management area.

4. An apparatus for overwriting data on an optical disc, comprising:

a pickup unit configured to write data on the optical disc; and

a controller, operatively coupled to the pick up unit, configured to control confirming whether a recording mode applied to the optical disc is a sequential recording mode by reading recording mode information recoded in a temporary management area of the optical disc, in which data is recorded sequentially onto sequential recording ranges allocated to a data area of the optical disc, wherein each of the sequential recording ranges is one of an open sequential recording range having a next writable area and a closed sequential recording range having no writable area; and

wherein the controller is also configured to control the pickup unit to perform a replacement recording for an overwrite-requested data onto a replacement recording area, wherein if the overwrite is requested in an open sequential recording range, the controller identifies a next writable area within the open sequential recording range as the replacement recording area.

5. The apparatus of claim 4, wherein said controller configured to control the pickup unit to write location information of the overwrite-requested area and the replacement-recorded area as management information, after execution of the overwrite.

6. The apparatus of claim 5, wherein the controller configured to the pickup unit to write the location information in a temporary management area.