METHOD FOR FREQUENCY DOMAIN ACOUSTIC ECHO SUPPRESSION BASED ON BOUNDARY CONDITION

摘要

PURPOSE: A method for suppressing a frequency domain acoustic echo based on a boundary condition is provided to solve the problems resulting from the application of same echo signal removal parameter to all boundaries. CONSTITUTION: Single and simultaneous call boundary conditions are obtained from a signal inputted from a microphone of a near-end speaker terminal(S100). Based on the obtained single and simultaneous call boundary conditions, an acoustic echo signal in a frequency domain is estimated(S200). Parameter Wiener filter values corresponding to the obtained boundary conditions are calculated by using the acoustic echo signal in the estimated frequency domain(S300). On the basis of the calculated parameter Wiener filter values, the output signal from which acoustic echo signal is removed is obtained(S400).