Patent ID: 7391696

Claim:
An apparatus for writing input data on an optical recording medium using a write pulse waveform including a first pulse, a last pulse and a multi-pulse train, the apparatus comprising: a controller that controls the write pulse waveform based on a grouping table to generate an adaptive write pulse waveform by varying a position of a rising edge of the first pulse of a mark to be written according to a length of the mark to be written and/or a leading space and without regard for a trailing space of a present mark being written using the adaptive write pulse waveform, a width of the first pulse being varied by varying the position of the rising edge and the grouping table storing rising edge data of the first last-pulse of the write pulse waveform varying according to corresponding stored values of lengths of marks to be written; and an optical pickup that optically writes the input data on the optical recording medium using the adaptive write pulse waveform.