Patent ID: 7391698
Filing Date: 2008-06-24
Classification: G11B

Abstract:
1. 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 controlling 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 a leading space, the grouping table storing rising edge data of the first pulse of the write pulse waveform varying according to corresponding stored values of lengths of marks to be written; and an optical pickup optically writing the input data on the optical recording medium using the adaptive write pulse waveform, wherein the generated adaptive write pulse waveform is generated without regard for a trailing space of a present mark being written using the adaptive write pulse waveform, and a width of the first pulse is varied by varying the position of the rising edge.