| 摘要 |
FIELD: information technology.SUBSTANCE: method includes steps of classifying encoded data according to a combination of a mark length of a mark, a space length of a first space and a space length of a second space; generating a write pulse train for forming a mark, in which a leading end edge position, a trailing end edge position or a pulse width of the write pulse train is changed according to the classification result. The space length of the first space is classified on M space length classes and the space length of the second space is classified on N space length classes. If the leading end edge position or the pulse width changes at the step of generating a write pulse train, one leading end edge position or pulse width is changed according to the classification result, wherein M is greater than N. If the trailing end edge position changes at the step of generating a write pulse train, the trailing end edge position is changed according to the classification result, wherein N is greater than M.EFFECT: reduced effect of inter-symbol and thermal noise on the quality of recording.19 cl, 26 dwg |
