Patent ID: 8311238
Filing Date: 2012-11-13
Classification: H04S

Abstract:
1. An audio signal processing apparatus comprising: dividing means for dividing audio signals of a plurality of channels into a plurality of frequency bands; phase difference calculating means for calculating a phase difference between the audio signals of the plurality of channels for each of the plurality of frequency bands divided by the dividing means; level ratio calculating means for calculating a level ratio between the audio signals of the plurality of channels for each of the plurality of frequency bands divided by the dividing means; and audio signal processing means for determining, for each of the plurality of frequency bands, a single gain value based, at least in part, on information on a designated localization angle indicative of a location of an audio source providing an audio signal for extraction from the audio signals and the phase difference and the level ratio for each of the plurality of frequency bands calculated by the phase difference calculating means and the level ratio calculating means and applying, to the audio signals in each of the plurality of frequency bands, the corresponding single gain value to extract the audio signal provided by the sound source localized at the designated localization angle.