网络流行的开源回声消除算法，听说很好用，但是我没有用过，分享出来，给大家使用。-popular network revenue echo cancellation algorithm, heard useful, but I never used to share out for everyone to use.

speex自带的回音消除源码，听说很不错，传上来共享下-speex echo cancellation comes with source code, I heard a very good pass up to share the