Data detecting device, reproducing device, and data detecting method

A reproducing device comprising:

• a head unit that reads out reproduction information signals from a recording medium;
• a multi-input adaptive equalizer that comprises 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 the multi-input adaptive equalizer receives the reproduction information signals comprising a first reproduction signal and a second reproduction signal which are simultaneously read out from the recording medium, wherein the first reproduction information signal is obtained from a target track which is data detection target, wherein the second reproduction information signal is obtained from a close track close to the target track which is a crosstalk component for the first reproduction information signal, wherein the reproduction information signals are input to the plurality of adaptive equalizers without any timing adjustment;
• a binarizing unit that obtains binarized data by performing a binarization process on 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;
• 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 performing convolution on the binarized data obtained from the binarizing unit, and supplies the equalization error to control adaptive equalization of the multi-input adaptive equalizer;
• and
• a demodulating unit that demodulates reproduction data from the binarized data obtained by the binarizing unit.

A data detecting method, comprising:

• inputting reproduction information signals comprising a first reproduction signal and a second reproduction signal to a multi-input adaptive equalizer, wherein the first reproduction information signal is obtained from a target track which is data detection target, wherein the second reproduction information signal is obtained from a close track close to the target track which is a crosstalk component for the first reproduction information signal, wherein the reproduction information signals are input to a plurality of adaptive equalizers of the multi-input adaptive equalizer without timing adjustment;
• performing a binarization process on an equalization signal output from the multi-input adaptive equalizer to obtain binarized data;
• performing convolution directly on the binarized data obtained by the binarizing process to obtain an equalization target signal;
• obtaining an equalization error from the equalization signal output from the multi-input adaptive equalizer and the equalization target signal;
• and
• performing tap coefficient control for adaptive equalization of the multi-input adaptive equalizer, using the equalization error.