Patent ID: 7388824

Claim:
An apparatus for forming a first state and a second state alternatively and sequentially on an optical recording medium in response to input data having a first level and a second level less than the first level, respectively, in an optical recording apparatus, the apparatus comprising: a recording waveform generating unit generating a recording waveform which includes: a first multi-pulse corresponding to the first level of the input data and having first pulses alternating between a low first multi-pulse level and a high first multi-pulse level, a second multi-pulse preceding the first multi-pulse and corresponding to the second level of the input data, the second multi-pulse having second pulses alternating between a low second multi-pulse level and a high second multi-pulse level, a cooling pulse connecting another first multi-pulse preceding the second multi-pulse and which extends from a trailing one of the pulses of the another first multi-pulse to a leading one of the pulses of the second multi-pulse, the cooling pulse forming a portion of the first pulses of the another first multi-pulse and a portion of the second pulses, the leading one of the pulses of the second multi-pulse set to the low second multi-pulse level, a power level between an end of the second multi-pulse and a first one of the pulses of the first multi-pulse set to the high second multi-pulse level, and the high second multi-pulse level set between the low and high first multi-pulse levels.