Demodulator, optical disk drive and semiconductor integrated...

Details Demodulator, optical disk drive and semiconductor integrated... Demodulator, optical disk drive and semiconductor integrated...

2007-08-14

2007-08-14

Huber, Paul W. (Department: 2627)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S124040

Reexamination Certificate

active

10659340

ABSTRACT:
A demodulator includes a wobble signal processor configured to convert a waveform of a wobble signal, and to generate a clock and a reference value based on a converted wobble signal. A sampling circuit is configured to sample the converted wobble signal by using the clock, and to generate a sampled signal. A viterbi decoder is configured to decode an auxiliary recording signal superposed on an optical disk by using the reference value and the sampled signal.

REFERENCES:
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patent: 2002-279645 (2002-09-01), None
U.S. Appl. 09/953,869, filed Sep. 18, 2001, Kaneshige et al.
U.S. Appl. 10/659,340, filed Sep. 11, 2003, Kaneshige.

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