Patent ID: 7417815
Filing Date: 2008-08-26
Classification: G11B

Abstract:
1. A recording and reproduction apparatus, comprising: a reproduction section for generating a digital signal from an analog signal representing information reproduced from an information recording medium; a waveform rectification section for receiving the digital signal and rectifying a waveform of the digital signal; a maximum likelihood decoding section for performing maximum likelihood decoding of the digital signal having the waveform thereof rectified, and generating a binary signal representing a result of the maximum likelihood decoding; a reliability calculation section for calculating a reliability of the result of the maximum likelihood decoding based on the digital signal having the waveform thereof rectified and the binary signal; an adjusting section for adjusting a shape of a recording signal for recording the information on the information recording medium based on the calculated reliability; and a recording section for recording the information on the information recording medium based on the adjusting result of the shape of the recording signal, wherein the adjusting section adjusts a shape of a prescribed portion of the recording signal.