Patent ID: 7460627

Claim:
A device for reproducing data, comprising: reproduction means for reproducing digital data; analogue-digital conversion means for converting an analogue signal sent from the reproduction means to a digital signal; and digital equalizing means for equalizing the digital signal sent from the analogue-digital conversion means so as to have a desired target characteristic, wherein the digital equalizing means has variable filtering means for adjusting an amplitude of the digital signal sent from the analogue-digital conversion means, variable group delay filtering means for adjusting a group delay of the digital signal sent from the variable filtering means, and variable FIR filtering means for compensating for a difference between characteristics of the digital signal sent from the variable group delay filtering means and the target characteristics, wherein the variable filtering means comprises fixed FIR filtering means for adjusting a high region amplitude of the digital signal sent from the digital-analogue conversion means, variable band-pass filtering means for adjusting a predetermined band amplitude of the digital signal sent from the fixed FIR filtering means, and variable high-pass filtering means for adjusting the high region amplitude of the digital signal sent from the variable band-pass filtering means.