BLIND SOURCE SEPARATION METHOD IN REVERBERANT ENVIRONMENTS BASED ON ESTIMATION OF TIME DELAY AND ATTENUATION OF THE SIGNALS

摘要

PURPOSE: Time delay of signal and a mute sound source dividing method in repercussion environment based on attenuation estimation are provided to consider repercussion environment, estimate per-frequency attenuation and time delay value, and divide mute sound source signal, thereby improve dividing function of the mute sound source signal. CONSTITUTION: Mute sound source divider performs initialization for per-frequency attenuation and time delay value for inputted mixed signal(200). The mute sound source divider learns the per-frequency attenuation and time delay value(202). The mute sound source divider divides per-frequency signal by usage of per-frequency binary mask(206). The mute sound source divider matches order by acquisition of coefficient of correlation of the divided signal(208). The mute sound source divider optimizes the order(210). [Reference numerals] (200) Initializing a per-frequency attenuation and time delay value; (202) Learning a per-frequency attenuation and time delay value; (204) Generating a per-frequency binary mask; (206) Dividing a per-frequency sound source signal by using a per-frequency binary mask; (208) Arranging orders by obtaining correlation coefficient for each per-frequency dividing signal; (210) Order optimization; (AA) Start; (BB) End