Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1996-08-23
1999-02-02
Dinh, Tan
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 54, G11B 390
Patent
active
058674640
ABSTRACT:
A device suitable for playing different types of information carriers, such as a CD and an MMCD, on which the information is recorded in a track pattern that has various physical parameters. The processing of the read signal for information reproduction, and the servo such as the drive motor and the servotracking, are to be set to the particular type of information carrier. For determining the type of information carrier, the device includes a discriminator. During a discrimination process, a read signal is generated without the servo tracking facility being in operation. Signal properties related to the physical parameters are then derived from the read signal, based upon which properties the type of information carrier is determined.
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Cloetens Henry
Suermondt Rutgerus E.E.F.
Belk Michael E.
Dinh Tan
U.S. Philips Corporation
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