Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

2005-02-07

2009-10-06

Feild, Joseph H (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal processing for controlling recording light...

C369S059210, C369S124110

Reexamination Certificate

active

07599271

ABSTRACT:
An optical disk apparatus has a highly accurate trial writing function corresponding to a PRML system and copes with a bad jitter of a 2Tw mark in order to realize an optical disk, the recording/reproduction of which is enabled in both a DVD and a Blu-ray Disc by a drive. After a reproducing signal is A/D-converted, error pulse generation is enabled corresponding to the PRML by detecting an edge signal level, and an error pulse is generated when the level exceeds a threshold. At the same time, trial writing that corresponds to the difference in the jitter of the 2Tw mark and a mark of 3Tw or more is enabled by providing multiple error pulse thresholds.

REFERENCES:
patent: 5691857 (1997-11-01), Fitzpatrick et al.
patent: 6243339 (2001-06-01), Spruit et al.
patent: 6269062 (2001-07-01), Minemura et al.
patent: 7295502 (2007-11-01), Minemura

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