Optical disk controller which sets sampling interval according to rotational speed of optical disk

• US 6,996,045 B1
• Filed: 03/30/2000
• Issued: 02/07/2006
• Est. Priority Date: 03/31/1999
• Status: Expired due to Fees

• Current Assignee: Socionext Inc.
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Manabe, Noriyuki, Sakamoto, Hiroshi, Iwamura, Yoshiyuki, Sumi, Fumio
• Primary Examiner(s): PSITOS, ARISTOTELIS
• Application Number:
  US09/538,513
• Time in Patent Office: 2,140 Days
• Field of Search: 369/53.18, 369/116, 369/29.01, 369/53.41, 369/53.42, 369/53.44, 369/106, 369/13.02, 369/44.28, 369/30.16, 369/53.12, 369/53.25, 369/53.3, 369/53.35, 369/53.37, 710/15, 710 17- 19
• US Class Current: 369/53.3
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 2220/213 Read-only discs
• CPC Class Codes: G11B 2220/2545 CDs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 27/36 Monitoring, i.e. supervising the progress of recording or reproducing for digital recording G11B20/00 and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by H04N5/76 and subgroups, see H04N17/06

Abstract

The optical disk controller of this invention that reduces the frequency of output of status reports to relieve the burden of a system controller includes: a status generator for generating status reports each representing the operation state of the optical disk controller every sector of a disk; and a status sampling section for sampling the status reports at a set sampling interval. When a generated status report matches with “sampling abort” status stored in a sampling category storing portion, status sampling is aborted.

Claims

1. An optical disk controller for performing signal processing for an optical disk, comprising:

an error correcting section for performing error correction for data read from the optical disk and outputting an error correction result;

a status generator for generating status reports based on the error correction result outputted by the error correcting section, each representing the operation state of the optical disk controller; and

a status sampling section for selectively sampling the status reports, said status sampling section comprises a sampling interval setting portion for setting a status sampling interval, wherein the sampling interval setting portion sets the sampling interval according to the rotational speed of the optical disk.

2. The optical disk controller of claim 1, wherein the sampling interval setting portion determines the rotational speed of the optical disk according to a synchronization period of a signal demodulated from the optical disk.

3. The optical disk controller of claim 1, further comprising assigning means for allowing the sampling interval setting portion to set the sampling interval according to a command input externally.

4. The optical disk controller of claim 1, wherein the sampling interval setting portion sets the sampling interval according to an error rate of a signal demodulated from the optical disk.

5. The optical disk controller of claim 1, wherein the status sampling section comprises a sampling category storing portion that stores “

sampling abort”

status indicating that sampling operation should be aborted, and

when the status report generated by the status generator matches with the “

sampling abort”

status stored in the sampling category storing portion, the sampling is discontinued.

6. The optical disk controller of claim 1, wherein the status sampling section comprises a sampling category storing portion that stores “

forced sampling”

status indicating that the status report should be forcibly output even during sampling operation, and

when the status report generated by the status generator matches with the “

forced sampling”

status stored in the sampling category storing portion, the status is output even during sampling operation.

7. The optical disk controller of claim 5 or 6, further comprising assigning means for setting sampling category information representing the relationship between a factor in the status report and sampling operation and storing the sampling category information in the sampling category storing portion.

8. The optical disk controller of claim 7, wherein the status sampling section updates the sampling category information stored in the sampling category storing portion according to a signal demodulated from the optical disk.

9. An optical disk device comprising an optical disk controller, said optical disk controller comprising:

an error correcting section for performing error correction for data read from the optical disk and outputting an error correction result;

a status generator for generating status reports based on the error correction result output from the error correcting section, each representing the operation state of the optical disk controller; and

a status sampling section for selectively sampling the status reports, said status sampling section comprises a sampling interval setting portion for setting a status sampling interval, wherein the sampling interval setting portion sets the sampling interval according to the rotational speed of the optical disk.

10. The optical disk device of claim 9, further comprising a system controller for controlling an operation of the optical disk controller in reference to the status reports outputted by the status sampling section.

11. An optical disk controller for performing signal processing for an optical disk, comprising:

a status generator for generating status reports each representing the operation state of the optical disk controller; and

a status sampling section for selectively sampling the status reports,

wherein the status sampling section comprises a sampling interval setting portion for setting a status sampling interval, and

wherein the sampling interval setting portion sets the sampling interval according to the rotational speed of the optical disk.

12. The optical disk controller of claim 11, wherein the sampling interval setting portion determines the rotational speed of the optical disk according to a synchronization period of a signal demodulated from the optical disk.