Introduction - If you have any usage issues, please Google them yourself
Speex echo cancellation code analysis document, Speex project focused on by providing a high-performance alternative to voice codec for voice applications to reduce the input threshold. In addition, with respect to other codecs, Speex also very suitable for network applications, applications on the network has its own unique advantages. At the same time, it is part of the GNU Project Speex, in the revision of the BSD agreement has been well supported.