Patent ID: 7274647

Claim:
An apparatus for forming a recording pattern and an erase pattern alternatively and sequentially on an optical recording medium in response to input data having a first level and a second level, respectively, in an optical recording apparatus, comprising: a recording waveform generating unit generating a recording waveform which includes first pulses to form the recording pattern in response to the first level of the input data and second pulses including a leading pulse and a multi-pulse having corresponding high and low power levels to form the erase pattern in response to the second level of the input data, and further generates a cooling pulse as a portion of the first pulses forming another recording pattern preceding the erase pattern and another portion of the erase pattern before the leading pulse, wherein a power level of the leading pulse of the second pulses is the low power level of the multi-pulse, a power level of a period between an end point of the second pulses and a start point of the first pulses is the high power level of the multi-pulse, and a power level of the cooling pulse is below the low power level of the multi-pulse.