Multi-format optical disk device and optical disk recording...

Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal level detecting using a reference signal

Reexamination Certificate

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C369S052100

Reexamination Certificate

active

07102978

ABSTRACT:
The present invention is applied to an optical disk apparatus which records data on and/or plays back data from one of a variety of DVD optical disks. The present invention generates a binarization threshold S3by offsetting an envelope S2of a playback signal RF by an offset voltage V1, and binarizes the playback signal RF (S4) according to the binarization threshold.

REFERENCES:
patent: 6034937 (2000-03-01), Kumagai
patent: 6519213 (2003-02-01), Song et al.
patent: 2003/0002410 (2003-01-01), Senshu
patent: 10-198965 (1998-07-01), None
patent: WO 98/27553 (1998-06-01), None

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