AUDIO QUALITY ADJUSTMENT DEVICE

摘要

An audio quality adjustment device includes: a desired filter response input section (11) for inputting a desired filter response to the audio quality adjustment device; a spectrum calculation section (12) for calculating a Fourier spectrum for a filter response which has been input and set by the desired filter response input section (11); a spectrum smoothing processing section (13) for subjecting the Fourier spectrum calculated by the spectrum calculation section (12) to smoothing processing; a cepstrum calculation section (14) for transforming the Fourier spectrum smoothed by the spectrum smoothing processing section (13) into a cepstrum; and an LMA filter (15) using the cepstrum calculated by the cepstrum calculation section (14) as a filter coefficient. Moreover, the LMA filter (15) has an input terminal (16) for inputting an audio signal and an output terminal (17) for outputting an audio signal.