Track count method for an optical disc in an optical disc...

Details Track count method for an optical disc in an optical disc... Track count method for an optical disc in an optical disc...

2005-02-22

2005-02-22

Huber, Paul W. (Department: 2653)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S124150

Reexamination Certificate

active

06859424

ABSTRACT:
A method for counting a number of tracks of an optical disc in an optical disc system. The optical disc system includes an optical pickup, a light source, and a plurality of optical sensors. The method includes emitting a light beam to the optical disc from the light source, detecting light reflected from the optical disc by the optical sensors, and generating a tracking error signal according to detected signals of the optical sensors while the optical pickup moves along a radial direction of the optical disc. The method further includes generating a tracking error zero crossing signal according to the tracking error signal, generating a peak detecting signal according to the tracking error signal, generating a pseudo radio frequency zero crossing signal according to the peak detecting signal, and generating a track count signal according to the pseudo frequency crossing signal.

REFERENCES:
patent: 5199017 (1993-03-01), Kagami et al.
patent: 5289447 (1994-02-01), Kobayashi et al.
patent: 5426625 (1995-06-01), Bui et al.
patent: 5457671 (1995-10-01), Takata et al.
patent: 5475663 (1995-12-01), Ogino

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