Optical disk playing apparatus and method for discriminating...

Details Optical disk playing apparatus and method for discriminating... Optical disk playing apparatus and method for discriminating...

2005-10-04

2005-10-04

Huber, Paul W. (Department: 2653)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044280

Reexamination Certificate

active

06952387

ABSTRACT:
An optical disk playing apparatus which performs at least a focusing servo operation for reading light as a servo operation and irradiates the reading light onto one optical disk, receives reflected light from the optical disk by a pickup to obtains a light receiving signal, moves an irradiated position of the reading light onto the optical disk to cross tracks on the disk; generates a tracking error signal in response to the reading signal during the track crossing; compares the tracking error signal with a threshold value; and determines the type of the optical disk in accordance with the number of pulses in the compared result signal within a predetermined period from start of the track crossing.

REFERENCES:
patent: 5909419 (1999-06-01), Kamiyama
patent: 5995464 (1999-11-01), Okamoto et al.
patent: 6304535 (2001-10-01), Magome et al.

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