Research Of Network Audio Capture And Multi-Audio Mixing Algorithms Based On P2P

With the development of multimedia communication technology, people are increasingly demanding high audio quality. Pear to pear Internet-based voice communications can meet the needs of users no longer. The existing multi-point voice communications too long time delay and poor sound quality to prevente it's popular. The mai reason is that the existing multi-mixing algorithms can't solve overflow problems and can introduce the noise. Affecting the audio quality of voice communications. For this problem, there is a great significance do a research about the network audio capture and multi-mixing algorithm based on P2P technology. The primary coverage as follow:1) Research the principle of the P2P technology and the key technologies of the voice communications. And have further research on the Session Initiation Protocol SIP, voice coding, voice transport protocol and the key factors affecting voice quality which do a theoretical basis for realization the voice communications based on P2P.2) Researched the multi-point voice communications mode and designed a multi-point voice communications mode in the Internet environment based on P2P technology. The terminal receives the voice data from each client mixing at localhost without forwarding through the server to avoid one's own voice be mixed in. The modle can eliminate the echo, and reduce the delay which is lost due to the elimination of echo.3)Analyzed the several existing mixing algorithms based on the study of the mixing principles. And poined out that there is some lack of overflow handling and eliminate noise in these algorithms. On that basis, proposing a new algorithm names high threshold adaptive mixing.Using cushion wobble technology to control the timing squence of the audio. The algorithem is proved by experiments that the method can better handle the overflow and can get good voice performance.4)According to the requirement of the voice communications in well log interpretation collaboration platform, realizing the multi-point voice communications based on P2P. And using the audio capture technology, achieved the communications records. Currently, the system has been put into use in the oil.