| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase or decrease the recording power with high precision while recording data in an optical disk drive. <P>SOLUTION: The system controller 32 sets up the optimum recording power by carrying out OPC in the test area of an optical disk 10 and interrupts recording at a predetermined timing while recording data to adjust the optimal recording power by increasing or decreasing it. In the guard area at the interrupted positions, test data is written by changing the power to calculate the relationship between the signal quality of the test data and the power. Then the power is adjusted by using the calculated relationship to the power level for obtaining the desired signal quality. <P>COPYRIGHT: (C)2007,JPO&INPIT |
