| 摘要 |
<p>It is possible to improve recording quality in recording or rewriting information onto a phase-change type optical recording medium by a multi-speed method. A recording apparatus (1) records or rewrites optical information onto a phase change type optical recording medium (2) using a recording wave pulse-width-modulated (PWM) by the multi-speed method. Recording or rewriting of one signal having a signal width nT after the modulation is performed by a recording wave pulse string recording wave having a pulse part fp, a multi pulse part mp, and a pulse part ep. When the time width of the pulse part fp is x, and the time width of the pulse part ep is z, the relationship between the time width x and the time width z satisfies the following: 3z ≤ x ≤ 4.5z.</p> |
