Method and apparatus for identifying disc type

Details Method and apparatus for identifying disc type Method and apparatus for identifying disc type

2008-07-08

2008-07-08

Feild, Joseph (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

Reexamination Certificate

active

07397745

ABSTRACT:
A method and apparatus identifying a type of a recordable disc using the reflectivity and RPM (Rotation Per Minute) of the disc. The method includes the operations of detecting an RPM (Rotation Per Minute) of the disc, identifying a first disc type by comparing the RPM with a first reference value, measuring the reflectivity of the disc, and identifying a second disc type between a one-time recordable disc type and a re-recordable disc type by comparing the reflectivity of the disc with a second reference value. Accordingly, the lead-in time of the disc can be reduced.

REFERENCES:
patent: 5295125 (1994-03-01), Oonishi et al.
patent: 6201773 (2001-03-01), Aoki
patent: 6822936 (2004-11-01), Ono et al.
patent: 6868051 (2005-03-01), Ogihara
patent: 2005/0270924 (2005-12-01), Yanagawa et al.

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