잡음에 강건한 핸드프리 통신용 음향 반향제거 시스템

A Noise Robust Acoustic Echo Cancellation System for Hands-Free Telephony

In this paper, a noise robust acoustic echo cancellation system is proposed. Original AP(Affine Projection) algorithm has fast convergence speed in colored input signal but has noise amplification problem. So the proposed acoustic echo cancellation system uses Modified AP(Affine Projection) algorithm which normalizes the update equation by adding the multiplication of error power and projection order to autocovariance matrix of input signal. Through various computer simulations, we proved that the proposed algorithm performed well in noisy environment. Simulation results show the improved AIC(acoustic interference cancellation) performance than nlms and original AP algorithm.