Optical disc apparatus and method of reproducing a wobble...

Details Optical disc apparatus and method of reproducing a wobble... Optical disc apparatus and method of reproducing a wobble...

2007-09-04

2007-09-04

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

10183969

ABSTRACT:
An optical disc apparatus and a wobble signal detection method in which a light beam projected onto an optical disc and reflected by the optical disc is divided into at least four light regions in the direction corresponding to the radial direction of the optical disc to detect the light regions, and a wobble signal is detected by performing a subtraction on first and second difference signals, the first difference signal obtained by performing a subtraction on detection signals for the inner light regions of the divided and/or detected light beam and the second difference signal obtained by performing a subtraction on detection signals for the outer light regions of the divided and/or detected light beam. Accordingly, when a wobble signal is reproduced from an optical disc manufactured by a wobble modulation manner, a wobble signal is prevented from being degraded due to the interference (cross talk) from the wobbles of adjacent tracks, even though the track pitch of the optical disc is reduced to improve the recording density.

REFERENCES:
patent: 4918675 (1990-04-01), Lee
patent: 6377525 (2002-04-01), Iida
patent: 6385257 (2002-05-01), Tobita et al.
patent: 6826142 (2004-11-01), Kim et al.
patent: 6891782 (2005-05-01), Saito et al.
patent: 7-262583 (1995-10-01), None
patent: 9-265642 (1997-10-01), None
patent: 9-326122 (1997-12-01), None
patent: 10-83539 (1998-03-01), None
patent: 10302263 (1998-11-01), None
patent: 2001-148134 (2001-05-01), None
Machine Translation of Araki (JP 09-265642).

Affiliated with

Also associated with

Rating

Optical disc apparatus and method of reproducing a wobble... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disc apparatus and method of reproducing a wobble..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc apparatus and method of reproducing a wobble... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3722501