Patent ID: 8913475

Claim:
A data detecting device comprising: a multi-input adaptive equalizer comprising a plurality of adaptive equalizers, wherein the multi-input adaptive equalizer outputs an equalization signal by calculating outputs of the plurality of adaptive equalizers and adding the calculated outputs of the plurality of adaptive equalizers to one another, wherein a first reproduction information signal from a target track, which is data detection target, and a second reproduction information signal from a close track close to the target track, which is a crosstalk component for the reproduction information signal, are input to the plurality of adaptive equalizers, wherein the first reproduction information signal and the second reproduction information signal are simultaneously read out from a recording medium; a binarizing unit that obtains binarized data by performing binarization of the equalization signal output from the multi-input adaptive equalizer; a convolver that obtains an equalization target signal by performing convolution on the binarized data supplied to the convolver from the binarizing unit; and an equalization error calculating unit that obtains an equalization error from the equalization signal output from the multi-input adaptive equalizer and the equalization target signal obtained by the equalization error calculating unit from the convolver, and supplies the equalization error to control adaptive equalization of the multi-input adaptive equalizer.