Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

2005-04-26

2005-04-26

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

Reexamination Certificate

active

06885617

ABSTRACT:
Recording power is optimized in an optical disk apparatus by recording a test signal on an optical disk while varying the recording power, and then determining a β value from a reproduced signal. A controller calculates a change in β value with respect to the recording power. A target β value is selected from those within the range wherein the β value varies linearly. The recording power by which the target β value is produced is selected as an optimum recording power for recording data on the optical disk. A modulation factor or parameters other than the β value may also be used as an indication of quality of reproduced signals.

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