Research On Stereo Acoustic Echo Cancellation

With the multi-media communication technology and speech signal processing technology development, as well as requirements increased on quality of voice communication systems in recent years, desktop telephone conferencing system and video-conferencing system have been widely used, so multi-channel echo cancellation effect become a key to communication quality.The paper aimed to research on stereo acoustic echo cancellation, and simulate result with the matlab.The first chapter briefly describes the principle of echo generation and echo cancellation. In the second chapter, this paper introduces the typical arithmetic of single-channel echo cancellation, such as LMS and RLS algorithm. The third chapter studies the existing stereo echo canceller adaptive algorithm, on this basis describe the problem of stereo echo cancellation algorithm (uniqueness of solution and misalignment), and then listed the solutions of problem. In the fourth chapter, the paper focuses on others module arithmetic of the stereo echo cancellation. The last two chapters elaborate the design of the stereo echo cancellation, bring forward improvement on preprocess, then simulate the method, and prove a better echo cancellation effect through nonlinear preprocess.