Synchronizing signal detector for multi-beam optical disk unit

Details Synchronizing signal detector for multi-beam optical disk unit Synchronizing signal detector for multi-beam optical disk unit

1992-11-30

1994-07-19

Hajec, Donald

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 4437, 360 59, H04N 576, G11B 700, G11B 502

Patent

active

053316185

ABSTRACT:
There is disclosed a synchronizing signal detector for a multi-beam optical disk unit employing a semiconductor laser array as an optical head, in which detection of a synchronizing signal is performed when all-bit coincident is detected in one half or more of multi-beams or when almost all-bit coincident is detected for a beam within a small number of bits before or after the all-bit coincident in another beam. Once a first synchronizing signal of each sector is detected, synchronizing signals of the subsequent second, third, . . . blocks can be detected without fail through utilization of a flywheel signal generator

REFERENCES:
patent: 4283777 (1981-08-01), Curry et al.
patent: 4450552 (1984-05-01), Marcantonio
patent: 4872155 (1989-10-01), Yokogawa et al.
patent: 5088080 (1992-02-01), Ishibushi et al.

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