speex1.2.beta3最新源码,支持网络语音压缩和回声抵消，应用与VOIP，内附源码和中文使用说明。-speex1.2.beta3 the latest source code, support for voice compression and echo cancellation network, application and VOIP, containing source code and instructions in Chinese.

linphone-3.3.0 版本，这个就不多做介绍了，知道的人都知道！如果还是不知道，那么看看下面英文的介绍吧。-Features Linphone provides a large amount of functionalities. List of supported features: * audio with the following codecs: speex (narrow band and wideband), G711 (ulaw,alaw),

回声消除，speex中用于IP通信的回声消除-echo cancellation