| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a recording and reproducing method for dye-based recordable DVD media, capable of performing low-jitter and low error rate recording, manufactured more easily than a land prepit format used in a DVD-R, and capable of efficiently additionally writing a data part by a high-frequency wobbling format. <P>SOLUTION: The method includes recording a mark of the shortest length on a dye-containing recording layer of a dye-based recordable DVD medium using single pulse light whose front edge is increased in output, recording second and subsequent length of marks with a pulse light where front and rear edges are increased in output for a given duration, the power of the front edge of pulse is equal to that of the front edge of pulse for the shortest mark, the power of the rear edge of pulse is equal to that of the rear edge of pulse for the shortest mark, and reproducing recorded information using a reproduction beam, wherein the irradiation intensity of cooling pulse provided after the rear edge of pulse upon mark recording is 0.1 mW or less for a given duration, and the recording linear velocity is 42 m/s or more. <P>COPYRIGHT: (C)2007,JPO&INPIT |
