Patent ID: 7362957

Claim:
A reproducing apparatus, comprising: reproducing means for reproducing an information signal from a recording medium; equalizing means for controlling a group delay of the information signal reproduced by said reproducing means; converting means for sampling the information signal output from said equalizing means and for converting the information signal into a digital signal composed of a plurality of bits per sample; detecting means for converting the digital signal output from said converting means into a n-values signal per sample; and control means for controlling said equalizing means by using both the digital signal to be input to said detecting means and the n-values signal output from said detecting means, wherein said control means includes multiplying means for multiplying the digital signal to be input to said detecting means by the n-values signal output from said detecting means to output an evaluation value signal representing a level of predetermined frequency of the information signal output from said equalizing means, and wherein said control means controls a group delay characteristic of said equalizing means according to the evaluation value signal.