METHOD AND APPARATUS FOR ACOUSTIC ECHO CANCELLATION USING SPECTRAL SUBTRACTION

摘要

PURPOSE: An echo cancelling method using a spectrum subtraction by improving the efficiency filter effect and an apparatus thereof are provided to remove the echo signal efficiently by using least minimum-mean-square-error. CONSTITUTION: An echo cancellation gain is obtained from a signal/microphone input signal by using least minimum-mean-square-error(S201). An echo absence probability is determined by using soft determination according to a statistical relation(S202). The correction echo cancelation gain is determined by using the echo cancelation gain and response member probability(S203).