Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2011-01-11
2011-01-11
Agustin, Peter Vincent (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
Reexamination Certificate
active
07869325
ABSTRACT:
While reproducing information on an optical disc, an optical disc apparatus varies a focus balance value in both positive and negative directions from a currently set value thereof by ±a which will not affect reproduction operation, measures jitter levels c and d of a reproduced signal when the focus balance value is varied in the positive and negative directions, and calculates a difference e=c−d between the measured jitter levels. If this difference e exceeds a threshold value f, the optical disc apparatus varies the focus balance value by a specified amount g in a direction in which the difference e approaches 0, thereby updating the current focus balance value.
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Agustin Peter Vincent
Funai Electric Co. Ltd.
Osha • Liang LLP
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