Patent ID: 6664526
Filing Date: 2003-12-16
Classification: G11B

Abstract:
An information recording apparatus of performing optical recording onto a recording medium with a record mark by using a light beam modulated in a manner of recording pulse series, comprising:a clock frequency change part changing a recording clock frequency according to a recording line velocity so as to make a recording line density uniform; and a recording power calculating part calculating a recording power in accordance with the change in recording line velocity by using an approximation formula, wherein: a recording area of the recording medium is concentrically divided into a plurality of recording zones; an end portion of record data recorded on a recording zone of the plurality of recording zones is reproduced; from a signal characteristic obtained from a thus-obtained reproduction signal, the approximation formula is corrected so that an ideal signal characteristic may be obtained; and the thus-corrected approximation formula is used for determining the recording power for recording onto a subsequent recording zone.