Control system for an optical storage device

Details Control system for an optical storage device Control system for an optical storage device

2007-11-09

2011-11-08

Chung, Phung M (Department: 2117)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

Reexamination Certificate

active

08055981

ABSTRACT:
A control system determines read performance of an optical storage device according to lock performance of a re-timing signal. The control system includes a filtering and re-timing unit for receiving a radio frequency (RF) signal and outputting the re-timing signal and an un-corrected output signal, an error correction unit for receiving the un-corrected output signal and correcting an error bit according to a Reed-Solomon algorithm to generate a corrected output signal, a lock performance detector for receiving the re-timing signal and detecting the lock performance of the re-timing signal and then outputting a lock performance index, and a servo control loop for receiving the RF signal and the lock performance index and thus generating a servo control signal. When the lock performance index does not reach a threshold value, the servo control loop loads other control parameters to improve the read performance of the optical storage device.

REFERENCES:
patent: 4931968 (1990-06-01), Hirose
patent: 7486461 (2009-02-01), Fujii et al.
patent: 7626908 (2009-12-01), Nakagawa et al.

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