System for reproducing an optical disc

Details System for reproducing an optical disc System for reproducing an optical disc

1993-03-22

1995-04-11

Epps, Georgia Y.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 4432, 369 32, 369 48, C11B 700

Patent

active

054065372

ABSTRACT:
A system for reproducing an optical disk which can prevent the restraint of an optical pickup in a track due to a scratch or other imperfection on the optical disk. The system includes checking whether or not there has been an increase of time in accordance with time information of a Q-channel in the demodulated subcode at the current pickup position, and, when the time is not increased, muting a reproduction output and jumping the optical pickup as far as a predetermined track. Thus, regardless of the occurrence of the optical pickup restraint phenomenon, reproduction can be continued by track jumping.

REFERENCES:
patent: 4796247 (1989-01-01), Vogelsang
patent: 4805163 (1989-02-01), Ohnuki
patent: 5099464 (1992-03-01), Maeda
patent: 5108124 (1991-05-01), Ogasawara et al.
patent: 5109365 (1992-04-01), Watanabe et al.
patent: 5122999 (1992-06-01), Kimura et al.
patent: 5124966 (1992-06-01), Roth et al.
patent: 5195076 (1993-03-01), Aoki
patent: 5218589 (1993-06-01), Aoki
patent: 5241521 (1993-08-01), Shigemori
patent: 5313443 (1994-05-01), Iitsuka

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