Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

2006-05-23

2006-05-23

Edun, Muhammad (Department: 2655)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S047500, C369S053100, C369S059100

Reexamination Certificate

active

07050374

ABSTRACT:
An optical disk apparatus for recording test data onto an optical disk while changing the level of recording power and determines the optimum recording power with reference to the quality of a reproduced signal of the test data. A modulation degree or a γ value is calculated from a reproduced signal of the test data, and the gradient of a change of the modulation degree or the γ value relative to the recording power Pw is calculated. Further, a target recording power is determined utilizing an area where the gradient of the change is relatively sharp, and the optimum recording power is determined based on the target recording power.

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patent: 40-10237 (1992-01-01), None
patent: 10-064064 (1998-03-01), None
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patent: 2001-0003547 (2001-01-01), None
patent: WO 98/25267 (1998-06-01), None

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