Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2007-06-08
2008-12-16
Agustin, Peter Vincent (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
Reexamination Certificate
active
07466638
ABSTRACT:
A recording power row P(i) is selected and a signal is recorded in a recording test region of an optical disk, while shifting a recording power, to detect a reproduced signal amplitude row m(i) that corresponds to the recording power row P(i). The relation of the recording power row P(i) and the row of multiplication products P(i)×m(i) is linearly approximated and the intersection of the linear approximation straight line and the recording power axis is computationally determined as recording threshold power Pthr, for at least three recording power rows Pj(i) that are centered at Pf(j) in the recording power row P(i) within a defined range. Then, the recording power Pt(j) is computed as a multiplication product of the recording threshold power Pthr(j) and a factor κ contained in the disk information, for each recording power row Pj(i). Finally, the optimum recording power Pwoptis computationally determined according to the at least three recording powers Pt(j).
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European Communication and Search Report dated Jan. 2, 2008, regarding Application No. 07110624.9—1232.
Agustin Peter Vincent
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
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