一种基于DSP的音频实时处理系统

摘要

声学回声消除器一直是视频会议系统不可缺少的组件.将回声消除算法结合噪音消除和静音检测算法等,提出一种改进的实时音频处理系统方法,并在TMS320C6713B上实现,能够有效改善噪音、双工检测、非线性回声等导致自适应滤波器发散的问题.该系统在保证正常双工通话的同时,对非线性回声的抑制有着明显的改善效果.%Acoustic echo canceller has being an indispensable component of video conferencing system.An improved method of real-time audio processing system is proposed in combination with echo cancellation, noise cancellation and voice activity detection.The system based on TMS320C6713B DSP chip, and improved the problems of noise, double-talk detection,nonlinear echo and other problems leading to divergent adaptive filter.The system can ensure normal double-talk, and has significantly improved results of non-linear echo suppression.