Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2007-10-23
2007-10-23
Korzuch, William R. (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
Reexamination Certificate
active
10915758
ABSTRACT:
A bandpass filter receives a tracking error signal. An average/minimum frequency measurement circuit repeats measurement prescribed times, of an average frequency and a minimum frequency of a signal output from the bandpass filter. A standard deviation calculation circuit assumes the average frequency and the minimum frequency obtained by prescribed times of measurement as one variate, and calculates a standard deviation of this variate. A determination circuit determines an optical disc to be reproduced as a read-only optical disc when the standard deviation is equal to or larger than a prescribed value, while it determines the optical disc to be reproduced as a recordable optical disc when the standard deviation is smaller than the prescribed value.
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Agustin Peter Vincent
Funai Electric Co. Ltd.
Korzuch William R.
Osha & Liang LLP
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