Optical data recording method and device

摘要

An optical data recording method comprising the steps of: modulating data to be recorded, to generate a plurality of recording modulation codes; and emitting a pulse-like light beam to an optical disc, so that a plurality of recording marks and spaces which have lengths corresponding to the plurality of recording modulation codes are formed on the optical disc, wherein at least two of the plurality of recording marks are formed by the light beam emitted according to a recording pulse train, the recording pulse train comprising: a first pulse which is disposed at a front and forms a leading edge of the recording mark, a last pulse which is disposed at a backend and forms a trailing edge of the recording mark, and a multi-pulse train which is disposed between the first pulse and the last pulse and forms a center of the recording mark, wherein the recording pulse train includes a multi-pulse area in which the multi-pulse train disposed, a position of at least one pulse of the recording pulse train in the multi-pulse area is set so that a multi-pulse duty is set at a predetermined value, the multi-pulse duty being obtained by dividing a pulse width of the multi-pulse train by a period of the multi-pulse train, and the multi-pulse train has a pulse period which is twice as large as a reference period T of the recording modulation code and a corresponding device.