| 摘要 |
PROBLEM TO BE SOLVED: To quickly record information in an optical disk by determining a necessary address in a short period, when writing information by a plurality of light beams. SOLUTION: In an address calculation circuit 34, when the address of a light beam is detected, the address of remaining light beam at that time and the next address to be read are calculated. Then, these calculated addresses are compared with the detected addresses in a comparison circuit 32. Then, a decision circuit 36 decides whether the detected addresses and the computed addresses matches. When they matches, the information recording is started, and when they do not match, the error deletion of the information is prevented by halting the recording of information. COPYRIGHT: (C)2004,JPO
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