Apparatus and method for compensating for tilt

Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval

Reexamination Certificate

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C369S053340

Reexamination Certificate

active

07065020

ABSTRACT:
A method for compensating for tilt in reproducing an optical reproducing medium is performed by determining an initial tilt driving direction so as to not interrupt a reproducer when tilt compensation is performed on the optical recording medium. The tilt compensation method involves comparing the amount of jitter detected over a certain period of time when the optical recording medium is reproduced with a reference value; determining the direction of tilt compensation in the direction of reproducing a track of the optical recording medium, before performing tilt compensation, when the amount of jitter detected, according to a comparison result of the comparator, exceeds a reference value; and resuming reproduction of the optical recording medium after performing tilt compensation so that the jitter decreases in the direction of the determined tilt compensation.

REFERENCES:
patent: 5627808 (1997-05-01), Hajjar et al.
patent: 5898654 (1999-04-01), Shimada et al.
patent: 6570828 (2003-05-01), Kikuchi et al.
patent: 2002/0054549 (2002-05-01), Ohtsu
patent: 2002/0080692 (2002-06-01), Nagaoka et al.
patent: 2003/0142598 (2003-07-01), Chou et al.
patent: 2001-093178 (2001-04-01), None
patent: 2001-195763 (2001-07-01), None
patent: 2002-050063 (2002-02-01), None
Office Action dated Oct. 12, 2004 in corresponding Japanese Patent Application No. 2003-099333.

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