Patent ID: 8837744

Claim:
A sound quality correcting method in an apparatus to which an audio signal is input, comprising: receiving an input audio signal; calculating feature quantities of the input audio signal for each of a plurality of intervals having a certain time length and being included to a first interval; calculating a score value for each of the plurality of first intervals based on the calculated feature quantities; calculating a power value, at a certain modulation frequency, of a modulation spectrum of the input audio signal; and correcting the score value in each of the plurality of first intervals that belong to a second interval if the power value calculated in the second interval is larger than or equal to a first certain value, and correcting the audio signal based on the corrected score value, wherein a voice score value representing a degree of dominance of a voice component in the audio signal for each of the plurality of first intervals is calculated based on the calculated feature quantities, wherein the voice score value in each of the plurality of first intervals that belong to the second interval is corrected if the power value calculated in the second interval is larger than or equal to the first certain value, and wherein a first correction is performed on the audio signal based on the corrected voice score value.