| 摘要 |
<p>A method of reducing the time required for a test recording performed before an actual recording, according to the characteristics of an optical disk. A random pattern signal is sent from a random pattern signal generating circuit (3), and recorded along a test track on the optical disk (1), and the bit error rate of a reproduction signal is measured by a BER measuring circuit (14). Only when the bit error rate is more than a predetermined value, a test pattern signal is sent from the test pattern signal generating circuit (4) and recorded. The edge timing of the reproduction signal is measured by an edge timing detecting circuit (13). The edge positions of a front end pulse and a rear end pulse are corrected based on the results of the measurement.</p> |
