基于FreeSwitch和DSP的多媒体会议系统的设计与实现

摘要

多媒体会议系统的出现有效地提高了人们的沟通效率.传统采用纯硬件的多媒体会议系统,由于价格昂贵,维护困难,让很多企业都望而却步;而单纯以软件构建的多媒体会议系统又由于对通用处理器能力要求过高、音视频效果不佳等原因,无法满足企业对高质量多媒体会议的需求.针对这一现实需求,设计一种以FreeSwitch为软交换平台,以SIP协议为信令协议,并外扩DSP来分离处理媒体,软硬件相结合的多媒体会议系统.实践表明该系统能够满足当前对多媒体会议系统的需求.%The emergence of multimedia conference system effectively improved the communication efficiency between people.lue to high cost and difficult in maintenance,quite a few companies flinch from traditional multimedia conference system purely using the hardware;however the multimedia conference system built with pure software also can hardly meet the demands of enterprises in high quality multimedia conferencing because of too high requirement in capacity of the general-purpose processor and poor audio and video performances.In view of this practical need,we design a multimedia conference system integrating both the software and hardware,it uses FreeSwitch as the soft switching platform,SIP protocol as the signaling protocol,and extends DSP to separate and process the media.Practice proves that the system can meet the current demands on multimedia conference system.