Patent ID: 7957966
Filing Date: 2011-06-07
Classification: G10H,G10L

Abstract:
1. A sound quality correction apparatus comprising: a feature parameter calculator configured to calculate various feature parameters to identify a speech signal and a music signal from an input audio signal; a speech/music identification score calculator configured to calculate a speech/music identification score indicating to which of the speech signal or the music signal the input audio signal is close to, based on the various feature parameters calculated by the feature parameter calculator; a sound quality corrector configured to execute a plurality of sound quality correction processes of different types on the input audio signal; and a controller configured to control a correction strength for each of the sound quality correction processes executed by the sound quality corrector, based on the speech/music identification score calculated by the speech/music identification score calculator, the controller being configured to determine a target correction strength for each of the sound quality correction processes executed by the sound quality corrector based on the speech/music identification score, and to change a present correction strength stepwise toward the target correction strength for each of the sound quality correction processes executed by the sound quality corrector, based on a forward transition time and a backward transition time which are predetermined for each of the sound quality correction processes executed by the sound quality corrector.