Method of identifying a type of optical disc

Details Method of identifying a type of optical disc Method of identifying a type of optical disc

2006-03-07

2006-03-07

Miller, Brian E. (Department: 2652)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

Reexamination Certificate

active

07009925

ABSTRACT:
A method of identifying a type of optical disc, and more particularly, to a method of identifying a type of optical disc as a single-layer disc or a dual-layer disc, in which levels of high-frequency signals reflected from the optical disc are compared with reference values set according to the characteristics of the optical disc. The method of identifying the type of optical disc includes detecting a level of a predetermined first high-frequency signal from the optical disc and setting a predetermined reference value, detecting a level of a predetermined second high-frequency signal which is generated differently according to the type of the optical disc, and comparing the reference value with the level of a second high-frequency signal and identifying the type of the optical disc. The levels of high-frequency signals are compared with a reference value, and thus the optical disc is identified. Accordingly, data recorded on the optical disc is reproduced smoothly regardless of a difference in sensitivity of a pickup.

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patent: 10-334573 (1998-12-01), None
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