Optical disc device

Details Optical disc device Optical disc device

2004-09-17

2008-03-04

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

C369S059110, C369S059100

Reexamination Certificate

active

07339872

ABSTRACT:
An optical disc device of the present invention obtains a reproduction quality that is independent of a mark distortion by receiving a signal that is obtained from an A/D converter for digitizing a reproduction signal of an optical disc medium and an offset correction means for performing offset correction, accurately measuring a mark distortion factor in a mark pattern having a long recording width by means of a mark distortion factor measuring means, and selecting one of output signals from a PRML signal processing means and a level judge binarization means by means of a digital data demodulation selection means by utilizing the measured mark distortion factor as a judgement criterion, to be used as a demodulation binary signal.

REFERENCES:
patent: 6483793 (2002-11-01), Kim
patent: 7194674 (2007-03-01), Okumura et al.
patent: 2000-123487 (2000-04-01), None
patent: 2002-008315 (2002-01-01), None
patent: 2002-269925 (2002-09-01), None

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