Link writing method for a recordable or rewritable compact disk and drive for using the method

• US 7,333,409 B2
• Filed: 08/29/2005
• Issued: 02/19/2008
• Est. Priority Date: 10/25/2000
• Status: Expired due to Term

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Tsai, Chao-Long, Pan, Jyh-Shin
• Primary Examiner(s): Davis; David
• Assistant Examiner(s): BELLINGER, JASON R
• Application Number:
  US11/214,192
• Publication Number:
  US 20050281160A1
• Time in Patent Office: 904 Days
• Field of Search: None
• US Class Current: 369/47.31
• CPC Class Codes: G11B 20/1252 for discontinuous data, e.g. digital information signals, computer programme data
• CPC Class Codes: G11B 2020/10814 involving specific measures to prevent a buffer underrun
• CPC Class Codes: G11B 2020/10972 Management of interruptions, e.g. due to editing
• CPC Class Codes: G11B 2020/1277 for managing gaps between two recordings, e.g. control data in linking areas, run-in or run-out fields, guard or buffer zones
• CPC Class Codes: G11B 2020/1461 8 to 14 modulation, e.g. the EFM code used on CDs or mini-discs
• CPC Class Codes: G11B 2220/218 Write-once discs
• CPC Class Codes: G11B 2220/2545 CDs
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/22 Means responsive to presence or absence of recorded information signals
• CPC Class Codes: G11B 27/24 by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 7/0045 Recording G11B7/006, G11B7/0065 take precedence
• CPC Class Codes: G11B 7/006 Overwriting G11B7/0065 takes precedence

Abstract

A link writing method for a recordable or rewritable compact disk includes recording a writing interruption address and enabling a succeeding writing process after the writing interruption. Enabling a succeeding writing process includes searching the linking area and enabling a start writing signal and activating a laser power. The method can link a succeeding writing area with a previously written interrupted area with sufficient accuracy to allow the data frame to be successfully processed by error correction within the host drive. The linking area may be positioned by counting the values of the interrupted block, the interrupted data frame, and the interrupted bit count or by detecting a blank area. Other techniques for positioning the linking area include detecting an unwritten area having a length greater than a maximum or writing a characteristic pattern after an interruption.

Claims

1. A link writing method for a recordable or rewritable optical disk comprising:

recording an interrupted position by storing values of an interrupted sector, an interrupted data frame, and an interrupted bit count when data under-run or other interruption occurs and enabling a succeeding writing process after the writing interruption, the succeeding writing process comprising;

positioning a linking area in accordance with the values of the interrupted sector, the interrupted data frame, and the interrupted bit count;

enabling a start writing signal;

advancing the linking area according to a write laser power settling time to an advanced linking area; and

activating a laser power, wherein the advanced linking area is linked to the interrupted position but is allowed to precede or be spaced from the interrupted position according to the write laser power settling time so that the interrupted data together with successively written data can be successfully error-correction processed.

2. The method of claim 1, wherein the positioning the linking area comprises:

reading the values of the interrupted sector, the interrupted data frame, and the interrupted bit count of the interrupted position;

setting a linking position, including starting sector, starting data frame and starting bit count;

searching the interrupted sector area by counting a sector SYNC signal to the starting sector;

searching the interrupted data frame by counting an EFM SYNC signal to the starting frame; and

searching the interrupted bit count by counting an EFMCLK pulse signal to the starting bit count.

3. The method of claim 2, wherein the starting sector, the starting data frame, and the starting bit count are set according to the interrupted sector, the interrupted data frame, and the interrupted bit count.

4. The method of claim 3, wherein an area length corresponding to a laser power settling time is subtracted from both the interrupted position and the linking position.

5. The method of claim 1, wherein the positioning the linking area comprises:

reading the values of the interrupted sector, the interrupted data frame, and the interrupted bit count of the interrupted position;

setting a linking position, including starting sector and starting bit count;

searching the interrupted sector by comparing an ATIP time code with the starting sector; and

searching the interrupted bit count by counting an EFMCLK pulse signal to the starting bit count.

6. The method of claim 5, wherein a value of the starting bit count is set to be a written bit count of the interrupted sector.

7. The method of claim 1, wherein the interrupted and successively written data frame is such that the data frame can be successfully CIRC processed.

8. An optical disk drive having a link writing function, comprising:

an encoding link controller for positioning a link area for a succeeding writing and generating a succeeding writing signal;

a microcontroller for receiving the succeeding writing signal of the encoding link controller and initiating a succeeding writing process; and

a laser responsive to the succeeding writing signal, the laser powered in a succeeding writing process to provide laser power to an optical disk at a position corresponding to data written prior to a data writing interruption, thereby providing an overlap area set according to a write laser power settling time.

9. The drive of claim 8, further comprising an ATIP decoder for providing an ATIP time code while reading data from a disk;

wherein the link area is positioned by the encoding link controller according to the ATIP time code and an EFMCLK pulse signal.

10. The drive of claim 8, wherein the overlap area is set to a length corresponding to a laser power settling time.

11. The drive of claim 8, wherein the laser writes an interrupted data frame portion and a successively written data frame portion that together form an interrupted and successively written data frame that can be successfully CIRC processed.

12. An optical disk drive having a link writing function, comprising:

a sub-code decoder for providing block SYNC signal and reproduced time code information while reading from a disk;

a SYNC pattern decoder for providing EFM SYNC signal while reading from the disk;

an encoding link controller for positioning a link area and generating a succeeding writing signal; and

a microcontroller for receiving the succeeding writing signal of the encoding link controller and starting a succeeding writing process; and

a laser responsive to the succeeding writing signal, the laser powered in a succeeding writing process to provide laser power to an optical disk at a position corresponding to data written prior to a data writing interruption, thereby exposing previously writing data to the laser during the succeeding writing process for a distance set according to the write laser power settling time.

13. The drive of claim 12, wherein the link area is positioned by the encoding link controller according to the block SYNC signal, the EFM SYNC pattern signal, and an EFMCLK pulse signal.

14. The drive of claim 12, wherein the encoding link controller detects an area where a data length is greater than a maximum run-length value to use the area as the linking area.

15. The drive of claim 12, wherein the laser writes an interrupted data frame portion and a successively written data frame portion that together form an interrupted and successively written data frame that can be successfully CIRC processed.