Patent ID: 7609602

Claim:
A method of generating a recording pulse train in accordance with a NRZI (Non-Return to Zero Inverted) signal for recording information to a recording medium by irradiating a pulse chain of an energy beam including a first pulse, a middle pulse chain, a last pulse and a negative pulse following the last pulse, comprising the steps: adjusting average power of the first pulse to a designated peak power level that is recorded in a control data zone; adjusting average power of the middle pulse chain to a designated peak power level that is recorded in the control data zone; adjusting average power of the last pulse to a designated power level that is recorded in the control data zone; adjusting average power of the negative pulse to a designated power level lower than the peak power level recorded in the control data zone; wherein a leading edge of the first pulse of the recording pulse train is controlled to start with a variable lapse of time from a leading edge of the NRZI signal, and a duration of the first pulse is fixed.