Synchronous circuit and optical disk reproduction device capable

Details Synchronous circuit and optical disk reproduction device capable Synchronous circuit and optical disk reproduction device capable

1997-11-20

2000-05-30

Tran, Thang V.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 59, G11B 700

Patent

active

060698551

ABSTRACT:
A synchronous circuit which detects a detection synchronizing signal generated from a reproduction signal in a detecting window having a prescribed time width, and in a detecting window having a prescribed time width, and generates a frame synchronizing signal. The synchronous circuit includes a counter for counting how many times detection synchronizing signals are not consecutively detected, and a detecting window width determining unit for increasing the time width of the detecting window if, as a result of comparison between a value counted by the counter and a prescribed value set in advance, the counted value reaches the prescribed value.

REFERENCES:
patent: Re33665 (1991-08-01), Ogawa
patent: 5677935 (1997-10-01), Karino

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