Patent ID: 7349321

Claim:
An information reproduction apparatus, comprising: means for forming a first beam spot and a second beam spot in an information recording medium; a first detector for detecting a reflected beam from said first beam spot; a second detector for detecting a reflected beam from said second beam spot; a first equalizer for adjusting at least a frequency characteristic of an output signal from said first detector; a second equalizer for adjusting at least a frequency characteristic of an output signal from said second detector; an arithmetic circuit for computing an output from both of said first and second equalizers respectively; a decoding block for decoding information recorded on said information recording medium according to said output from said arithmetic circuit; a target signal generator for generating a target signal from said output from said decoding block; a compensation value generator by comparing an output level of said target signal generator with an output value of said arithmetic circuit to compute a compensation value of a tap coefficient of said first equalizer and/or second equalizer; and input means for inputting said compensation value to said first equalizer and/or second equalizer.