Waveform equalizer, the information reproducing apparatus and method, and computer program

Waveform equalizer (15, 16, 21) samples the read signal read from the recording medium (50), an acquisition unit configured to acquire a plurality of sample points among the plurality of sample points is the acquisition, so that the amplitude values ​​of a plurality of sample points each zero-cross sample temae approaches the same value to each other, and the amplitude values ​​of a plurality of sample points each after the zero-cross sampling points so as to approach the same value to each other, the reading comprising filtering means for performing filtering processing on the signal.