用vb编写的open source code，关于voip的-with vb prepared by the open source code, on the 1/1/2006

speex中开源回声消除程序，可以直接运行模拟回声消除程序，针对于VOIP中的回声消除，输入和参考信号都是16位的PCM码-speex echo cancellation in the open-source program, you can run the simulation program directly echo cancellation for echo on VOIP in the elimination of the input and reference signals are