Patent ID: 6925041
Filing Date: 2005-08-02
Classification: G11B

Abstract:
1. An information recording apparatus, using a mark edge recording system for recording information on a recording medium at the leading edge and the trailing edge of each mark, comprising: a recording section for recording record data by applying laser light to the recording face of said recording medium on the basis of a recording pulse train determined depending on the length of a recorded mark and the length of a space immediately before or after the recorded mark, a reproduction section for reproducing information recorded on said recording medium and for outputting a reproduced RF signal, a recording power optimization section for extracting information on asymmetry and modulation degree changing depending on recording power from said reproduced RF signal in a recording pulse train determined for each recording medium and for determining recording power so that the extracted information becomes a predetermined value, a phase error detection section for generating a data extraction clock signal from said reproduced RF signal and for detecting the phase difference between said reproduced RE signal and said data extraction clock signal as a phase error for each combination of the length of a mark and the length of a space immediately before or after the mark, a recording compensation parameter adjustment section for determining an optimal emission waveform rule on the basis of the phase error detected by said phase error detection section at the recording power determined by said recording power optimization section, and a recording pulse train correction section for correcting said recording pulse train on the basis of the emission waveform rule determined by said recording compensation parameter adjustment section.