Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2005-05-25
2009-12-01
Tran, Thang V (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053230
Reexamination Certificate
active
07626907
ABSTRACT:
A method and an apparatus for determining types of digital versatile discs (DVDs) are provided. The method includes setting related parameters, acquiring a wobble signal from a DVD, setting a frequency dividing factor, and dividing the frequency of the wobble signal by the frequency dividing factor. Then, the time required for the digital versatile disc to spin one round, which is driven by a spindle motor of a disc player, is set as a unit time to calculate the frequency of the frequency-divided wobble signal. Finally, the type of the digital versatile disc is determined according to the frequency of the wobble signal.
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Chang Ricky
Lu Allen
Chow Van N
Perkins Coie LLP
Tran Thang V
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