The Design of MultiParty Call Software in Rescue Communication

According to the traditional multi party call solution can not meet the requirements of the special underground environment in the mine rescue communication process, a design of multi party call software based on Voice over Internet Protocol (VoIP) is proposed in this paper. Among them, the S3C6410 microprocessor and WinCE6.0 embedded operating system is used as hardware and software development platform of multi party call software. On the basis of the key technologies research in multi party call, according to the actual needs and design objectives of multi party call in the rescue communication system, and the VS2005 IDE is used to realize the voice communication function in multi party call. Voice quality is improved through echo cancellation technology in multi party call, the system bandwidth resources occupancy is reduced by voice activity detection and speech codec technology in the voice transmission, implementation of the multiple concurrent calls with audio mixing technology, which greatly facilitate the exchanges between the various parties on multi party call. The software can achieve multi party call function, also can provide a good voice call quality, meanwhile, it is proved that the feasibility of its application to the mine rescue communication system, and has widely applicability.