Patent ID: 8710919

Claim:
A data processing method for performing a process of eliminating ringing from a signal containing the ringing in a peak waveform, comprising: a filter-coefficient determining step, wherein a reference signal, which is divided into a peak region including a peak and a ringing region including no peaks higher than an acceptable error level, is inputted to a filter-coefficient learning section to determine a filter coefficient according to a learning algorithm for minimizing a covariance of a peak signal in the peak region and a ringing signal in the ringing region; a ringing-generating step, wherein a signal, which contains a peak waveform and ringing, is inputted to the ringing-generating filter that uses the filter coefficient previously determined to generate an analogous waveform of the ringing superposed on the signal; and a subtracting step, in which the analogous waveform of the ringing generated in the ringing-generating step, is subtracted from the signal to obtain a processed signal with a reduced magnitude of the ringing.