A METHOD FOR SUPPRESSING RESIDUAL ECHO BASED ON TRACKING ECHO-PRESENCE UNCERTAINTY

摘要

PURPOSE: A method for suppressing a residual echo based on tracking echo-presence uncertainty is provided to improve a performance of suppressing echo in a frequency region. CONSTITUTION: In a method for suppressing a residual echo based on tracking echo-presence uncertainty, a power ratio of a microphone input signal to a signal removed echo is obtained(S100). An EPU(Echo-Presence Uncertainty) is estimated by applying an obtained power ratio to a decision rule using threshold value(S200). A residual echo is removed by applying estimated EPU to an RES(Residual Echo Suppression) filter(S300).