| 摘要 |
<p>Information subjected to mark length demodulation is recorded on a recording medium by recording marks with different mark lengths under the condition that the time length nT of one recording mark (T is a reference clock and shorter than 25 nsec, and n is a natural number of 2 or more) is given by nT = (θ1 + α1 + β1 + ... + αm + βm + θ2) T where m is the number of pulse division of 2 or more, αi > 0 (real number), βi > 0 (real number), βm ≥ 0 (real number), -2 ≤ θ1 ≤ 2 (real number), -2 ≤ θ2 ≤ 2 (real number), and n/m ≥ 1.25, and a recording power is applied during a period αiT and a bias power is applied during a period βiT.</p> |
