ADAPTIVE EQUALIZATION CIRCUIT AND ADAPTIVE EQUALIZATION METHOD

摘要

There are provided an adaptive equalization circuit and an adaptive equalization method capable of performing a preferable signal processing of high calculation accuracy with a small size and improving the reproduction signal quality and a play ability for an abnormal signal. An equalization target value (true target value) is calculated in the sampling frequency portion by equalization target value generation means (104) from the signal in the re-sampling frequency portion after phase synchronization. By using this equalization target value and an I/O signal of head digital equalization means (102), a tap coefficient of the head digital equalization means (102) is adaptively calculated.