Patent ID: 6526012
Filing Date: 2003-02-25
Classification: G11B

Abstract:
An optical information recording apparatus in which a rewritable optical information recording medium is used and, before recording an information signal on the optical information recording medium, test recording is carried out on the optical information recording medium, the optical information recording apparatus comprising:a test signal generation means that generates a test signal; a recording means that converts the test signal and the information signal to a recording data signal, drives a light source based on the recording data signal, and records the test signal and the information signal on the optical information recording medium; a recording start point shifting means that shifts a start point for the test recording on the optical information recording medium at random in each sector; a reproducing means that reproduces signals from the optical information recording medium; and a recording condition determination means that allows the test signal generation means to supply the test signal to the recording means, carries out the test recording in a plurality of sectors on the optical information recording medium, and then determines edge positions of recording pulses in the recording data signal based on an average of results obtained by reproducing the test signal from each of the plurality of sectors by the reproducing means.