METHOD AND SYSTEM FOR SEPARATING PLURALITY OF ACOUSTIC SIGNALS GENERATED BY PLURALITY OF ACOUSTIC SOURCES

摘要

A method separates acoustic signals generated by multiple acoustic sources, such as mixed speech spoken simultaneously by several speakers (101,102) in the same room. For each source, the acoustic signals are combined into a mixed signal acquired by multiple microphones (110), at least one for each source. The mixed signal is filtered, and the filtered signals are summed into a signal (131) from which features are extracted. A target sequence (151) through a factorial HMM is estimated, and filter parameters (161) are optimized accordingly. These steps are repeated until the filter parameters converge to optimal filtering parameters, which are then used to filter the mixed signal once more, and the summed output of this last filtering is the acoustic signal for a particular acoustic source.