Optical recording medium, method of managing defective area thereof, recording method thereof, and recording/reproducing apparatus thereof

• US 7,539,100 B2
• Filed: 07/15/2004
• Issued: 05/26/2009
• Est. Priority Date: 07/15/2003
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Suh, Sang Woon, Kim, Jin Yong
• Primary Examiner(s): Young; Wayne R
• Assistant Examiner(s): SIMPSON, LIXI CHOW
• Application Number:
  US10/891,029
• Publication Number:
  US 20050210319A1
• Time in Patent Office: 1,776 Days
• Field of Search: None
• US Class Current: 369/53.17
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers

Abstract

The present invention provides a method of managing a defective area of an optical disc recordable at high speed, recording/reproducing method thereof, and recording/reproducing apparatus thereof, by which an accurate decision of the defective area is provided. Moreover, as optimal recording speed is applicable to re-recording in a specific section, thereby enabling to secure high reliance of data. In an optical disc provided with a defect management area for defect management within a high-speed recordable disc, the present invention includes verifying whether the defective area is generated in performing a recording at high speed, re-verifying presence or non-presence of defect of a corresponding area by changing a recording speed into low speed if the defective area is generated at the high speed, and recording to manage in the defect management area a location information of an area decided as the defective area at the high speed but as a non-defective area at the low speed.

Claims

1. A method of managing a defective area in a recording medium, the method comprising:

(a) checking whether a defective area is generated at a first recording speed;

(b) if the defective area is generated at the first recording speed, checking whether the defective area is generated at a second recording speed, wherein the second recording speed is lower than the first recording speed; and

(c) determining whether to replace the defective area with a replacement area based on a result of the step (b),

wherein if the defective area is generated at the first recording speed and the defective area is not generated at the second recording speed, the method further comprises recording a management information to indicate at least a location of the defective area.

2. The method of claim 1, wherein the management information further includes status information indicating that the defective area is not replaced.

3. The method of claim 1, wherein the management information further includes speed information of the second recording speed.

4. The method of claim 1, wherein the management information further includes speed information of the first recording speed.

5. The method of claim 1, wherein the management information is recorded as one entry per minimum recording unit.

6. The method of claim 5, wherein the minimum recording unit is one cluster.

7. The method of claim 1, wherein the management information is recorded as one entry for a consecutive minimum recording unit.

8. The method of claim 7, wherein the entry includes information designating a number of the consecutive minimum recording unit.

9. The method of claim 1, wherein the management information includes a start position of the defective area and an end position of the defective area.

10. The method of claim 9, wherein the management information further includes speed information of first recording speed or second recording speed.

11. The method of claim 10, wherein the start position and the end position are included in a first entry and the speed information for the defective area is included in a second entry.

12. The method of claim 11, wherein identification information for identifying the first and second entries is recorded in the corresponding entry.

13. A method of managing a defective area of an optical recording medium, the method comprising:

verifying whether the defective area is generated in performing a recording at an applicable maximum speed;

re-verifying a presence or non-presence of a defect of a corresponding area by changing a recording speed into an intermediate speed lower than the applicable maximum speed at least one time if the defective area is generated at the applicable maximum speed;

re-verifying the presence or non-presence of the defect of the corresponding area by changing the recording speed into a minimum speed if the defective area is generated at the intermediate speed; and

recording a location information of an area decided as the defective area at a specific area of the optical recording medium according to a result of each of the first to third steps,

wherein for the area decided as the defective area at the first step but as a non-defective area at the second step, the location information of the corresponding area is recorded at the specific area.

14. The method of claim 13, wherein a recording speed information applied to the second step is further recorded at the specific area.

15. The method of claim 13, wherein a recording speed information applied to the first step is further recorded at the specific area.

16. A method for recording data on an optical recording medium, the method comprising:

receiving a recording command for a specific area;

verifying whether a defective area is generated on the specific area at a first speed;

re-verifying a presence or non-presence of a defect of a corresponding area by changing a recording speed into a second speed if the defective area is generated at the first speed, the second speed being lower than the first speed;

recording data to be recorded in a first area decided as the defective area at both of the first and second speeds in a replacement area as a result of re-verifying step; and

recording data at the second speed on a second area decided as the defective area at the first speed but as a non-defective area at the second speed,

wherein the step of recording the data at the second speed on the second area further includes recording a management information to indicate at least a location of the defective area.

17. An apparatus for managing a defective area in a recording medium, the apparatus comprising:

a control unit configured to;

first check whether a defective area is generated at a first recording speed;

second check whether the defective area is generated at a second recording speed; and

determine whether to replace the defective area with a replacement area based on the result of the second checking; and

a pickup unit configured to record or reproduce data on/from the recording medium according to controlling of the control unit,

wherein the second recording speed is lower than the first recording speed, and

wherein the control unit is further configured to control the pickup unit to record management information indicating at least a location of the defective area, if the defective area is generated at the first recording speed and the defective area is not generated at the second recording speed.

18. The apparatus of claim 17, further comprising:

a host configured to transmit a command for recording or reproducing data to or from a specific area of the recording medium to the control unit via an interface unit,

wherein the control unit is further configured to control the recording or reproducing according to the command from the host.