Patent ID: 7724628
Filing Date: 2010-05-25
Classification: G11B

Abstract:
1. An apparatus to record NRZI data on an optical recording medium, the apparatus comprising: a recording waveform generator to generate a recording waveform having an erase pattern comprising a multi-pulse having a first level and a second level, wherein a power level of a period between a point where the NRZI data changes from a low level to a high level and a start point of a first pulse of a recording pattern is set to the first level of the multi-pulse or the second level of the multi-pulse, based on pulse information stored on the optical recording medium; and a pickup unit to radiate a light onto the optical recording medium according to the generated recording waveform to form a mark or a space; wherein the pulse information stored on the optical recording medium comprises power level information regarding the power level of the period between the point where the NRZI data changes from the low level to the high level and the start point of the first pulse of the recording pattern.