论文部分内容阅读
介绍了符合ITU TH .32 4协议在PSTN网上的可视电话系统的软件实现。该系统利用具有MMX技术的PC机实现软件实时视频、音频编解码 ,利用符合V .34协议的Modem通过PSTN网实现数据通信。重点讨论了H .2 6 3视频编解码、视频采集、视频显示以及H .2 4 5通信控制协议的实现。
The software implementation of videophone system conforming to ITU TH.332 protocol on the PSTN network is introduced. This system realizes software real-time video and audio codec by using PC with MMX technology, and realizes data communication through PSTN network by using V.34 protocol-based Modem. Focus on the H.263 video codec, video capture, video display and H.245 communication control protocol.