Patent ID: 8364483
Filing Date: 2013-01-29
Classification: H04R

Abstract:
1. A method for separating a sound source from a mixed signal, comprising: transforming a mixed signal to channel signals in frequency domain; grouping several frequency bands for each channel signal to form frequency clusters; separating the frequency clusters by applying a blind source separation to signals in frequency domain for each frequency cluster; and integrating the spectrums of the separated signal to restore the sound source in a time domain wherein each of the separated signals expresses one sound source, wherein said separating the frequency cluster includes: determining whether or not a channel scrambling problem or a scaling problem is generated in the frequency domain of each cluster; eliminating the channel scrambling problem, when the channel scrambling problem is generated, by comparing frequency characters of an overlap region in each cluster in said separating the frequency cluster, regarding two clusters having comparatively high likelihood of the overlap region as one sound source, and integrating the two clusters; eliminating the generated scaling problem, when the scaling problem is generated, by arranging an overlap region between two clusters in said separating the frequency cluster and controlling scaling of the two cluster to have same energy of the overlap region.