Optical disc device

Details Optical disc device Optical disc device

2006-09-26

2006-09-26

Psitos, Aristotelis M. (Department: 2653)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S047350, C369S053330, C369S124140

Reissue Patent

active

RE039306

ABSTRACT:
An optical disc drive usable with discs to which data is continuously recorded and discs having a sector format can quickly resume playback signal output after passing imperfection causing potential reading errors, and plays disc with few read errors. A detection signal generator detects DC level fluctuation in the playback signal read from the disc and generates a detection signal tracking the DC level fluctuation. A selector selects a detection signal or a null signal without valid polarity based on the detection signal generated by the detection signal generator and input to the selector. A clamping unit performs a clamping process to suppress DC level fluctuation in the playback signal based on the detection signal when the selection unit selects the detection signal, and does not perform the clamping process when the selection unit selects the null signal. A signal processor performs specific signal processes based on clamping unit output.

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patent: 2000/1000083 (2000-04-01), Shinichi
patent: 10-92111 (1984-04-01), None
MAT (Machine assisted translation) of JP 2000-100083.

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