| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical drive device and a signal generation method which can accurately detect amplitude values at pit and mark parts, with respect to an optical recording medium on which pits or marks are position recorded, even when sampling timing indicated by a clock relatively varies due to the influence of jitters of reproduction signals and the like. <P>SOLUTION: Reproduction signals are sampled at leading edge timing and trailing edge timing of a pit or a mark, and the sampling values are averaged. Averaging the sampling values sampled at both of the leading and trailing edge timing prevents detected amplitude values (namely, the values obtained by the averaging) from varying even when the sampling timing indicated by a clock varies with the reproduction signals. That is, the same amplitude value can be properly detected for a part where the same amplitude value is to be detected normally. <P>COPYRIGHT: (C)2012,JPO&INPIT |
