Patent ID: 7443776

Claim:
An optical recording method wherein information is recorded by forming recording marks in an amorphous state with various lengths on a crystalline state which is used as an unrecorded/erased state, in a phase-change recording layer of a rewritable optical recording medium having said phase-change recording layer, characterized in that: using one block pulse as a recording pulse to form one recording mark when a recording velocity is higher than a rewritable recording velocity; advancing the end timing of said block pulse by a first predetermined time period from the end timing of a data signal pulse when a length of said recording mark is not less than a predetermined length; delaying the start timing of said block pulse by a second predetermined time period from the start timing of the data signal pulse and advancing the end timing of said block pulse by a first predetermined time period from the end timing of said data signal pulse when the length of said recording mark is shorter than the predetermined length; and when the recording velocity is not higher than the rewritable recording velocity, using a pulse train comprised of a plurality of recording pulses as the recording pulse to form one recording mark.