桌面可视电话的设计与实现

The Design and Accomplishment of Tabletop Visual Telephone

桌面可视电话终端的软件实现应该包括视频和语音采集、视频和语音编解码、控制、复用、同步、实时传输等。本文的可视电话终端的视频模块采用经过改进的H.263视频编解码标准,语音模块采用G.723.1编解码,H.225.0协议实现呼叫及分组复用,H.245实现信道控制,RTP/RTCP实现实时传输。

The accomplishment of tabletop visual telephone' s terminal software should consists of video and sound collecting, video and sound coding and explaining, controlling, re - .using, synchronizing and practical transmitting, etc. The terminal video model plate of the visual telephone in this article has been adopted improved H. 263 video coding and explaining criterion. Its sound model plate has been adopted G. 723. 1 one, H. 225.0 a-greement has been accomplished re - using of calling and classifying, H. 245 has been accomplished information way controlling, and RTP/RTCP with practical transmission.