Synchronization circuit for optical disc apparatus and...

Details Synchronization circuit for optical disc apparatus and... Synchronization circuit for optical disc apparatus and...

2007-07-10

2007-07-10

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

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

C369S047140, C369S047280, C369S047480

Reexamination Certificate

active

10891532

ABSTRACT:
A synchronization circuit for an optical disc apparatus, which performs synchronization operation based on a playback signal of an optical disc, the circuit comprises a playback signal recovery timing detection circuit that detects timing corresponding to the recovery of the playback signal for a defect signal from a defect signal detection circuit, a delay counter that counts frame synchronization signals from timing at which loss of recorded data on the optical disc is not detected by the defect signal detection circuit, a delay determining circuit that determines whether a count of the frame synchronization signals by the delay counter has reached a predetermined delay count, and a circuit that starts the synchronization operation when informed by the delay determining circuit to the effect that the count of the frame synchronization signals has reached the predetermined delay count.

REFERENCES:
patent: 5089900 (1992-02-01), Yokogawa
patent: 10-208244 (1998-08-01), None

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