G.723.1 Codec在OpenH323协议栈上的实现

Realization of G.723.1 Codec on OpenH323 Protocol Stack

OpenH323是一个开放源码的VoIP(VoiceoverIP)协议栈,支持H.323和SIP等多媒体通信协议,为多媒体应用提供了一个很好的开发平台。G.723.1是ITU-T建议在中低速率多媒体通信中使用的语音压缩算法,目前该算法已在IP电话系统中得到广泛应用。基于OpenH323协议栈实现G.723.1Codec有着十分重要的应用价值。介绍在OpenH323的软件终端上实现G.723.1Codec的基本方法,并可推广到G.729等其它多种语音压缩算法。

OpenH323 is an open source VoIP(Voice over IP)protocol stack. It supports H.323, SIP and other multimedia communication protocols and provides a good developing platform for multimedia applications. G.723.1 is an ITU standard for speech codecs which are mainly used for medium-rate and low-rate multimedia communication applications. At present, G.723.1 has been widely used in the IP phone systems. Based on the OpenH323 software-end, realizing the G.723.1 codec has very important application value. In this paper, the realization method of G.723.1 codec on the OpenH323 protocol stack is presented, and it can be extended to G.729 and other speech codecs.