【摘要】 文中给出一种基于去相关最小均方(DLMS)算法和迭代最大长度序列相关(IMLC)算法的电话会议回声抵消系统。鉴于DLMS算法在远端会话期间具有好的工作性能,而IMLC算法在双端会话期间具有良好的工作效果,这种新的回声抵消系统在远端会话期间用DLMS算法估计回声路径,而在双端会话期间用IMLC算法估计回声路径。计算机仿真表明,这种新的回声抵消系统在远端会话和双端会话情况下均能提供较好的回声路径估计。更多还原

【Abstract】 The paper presents a novel adaptive acoustic echo cancellation system for teleconference systems based on a decorrelation least mean squares(DLMS)algorithm and iterative maximal length correlation(IMLC)technique.Since the DLMS adaptive filter works well during far-end-talk and the IMLC estimator works well during double-talk(DT),the new acoustic echo cancellation system esti-mates the impulse response of the room by the DLMS algorithm during ST and estimates the impulse response of the room by the IMLC technique dur ing DT.The computer simulations show that the new adaptive echo cancellation system can provide excellent echo cancellation under both acoustic operating circumstances.[更多还原