摘要
描述一个基于Windows平台的双通道回声抵消系统。该系统使用一种高速、高采样率的音频I/O驱动模型,能够在底层解决系统中声音处理的实时性和同步性问题。为了尽量减少网络和计算机资源的占用,采用重采样技术来改变声音信号在网络传输和实时处理时的采样率,其中系统使用重采样技术降低声音通道间的相关性,以提高回声抵消算法的效率。最后通过实验验证了双通道回声抵消系统的有效性。
A dual-channel acoustic echo cancellation （AEC） system on Windows platform is proposed. It involves a high-speed and high sampling rate audio I/O driver model, which can solve the real-time and synchronic audio processing problems through low-level interface. To reduce the transmission and computation loads, a resampling technique is used to adjust the sample rate during net transmission and real-time processing. Additionally, the inter-channel decorrelation is implemented with frequency-do- main resampling technique so as to improve the performance of echo cancellation. The experimental results verified the effective- ness of the proposed system.
出处
《计算机与现代化》
2014年第4期199-202,207,共5页
Computer and Modernization
关键词
回声抵消
多线程
重采样
去相关
acoustic echo canceler
multi-thread
resample
decorrelation
