基于双网融合的话音无堵塞可视电话系统设计  

Design of Voice Blockless Video Telephone Based on Dual Network

作　　者：李洛[1] 吴绍根[1] 廖永红[1] 陈建国 

机构地区：[1]广东轻工职业技术学院,广东广州510300 [2]广州泛网视讯科技有限公司,广东广州510300

出　　处：《广东轻工职业技术学院学报》2008年第3期1-4,共4页Journal of Guangdong Industry Polytechnic

基　　金：广东省科技计划项目:新一代话音无堵塞多媒体可视电话系统(2007B080701005)

摘　　要：现有的可视电话系统将话音及视频数据通过IP宽带数据网络进行传输。由于IP数据网络所固有的流量突发特性,将对实时性要求很高的话音数据造成间续性的话音堵塞延时,使话音质量难以得到保证。基于网络融合技术将话音数据在PSTN网络上传输、将视频数据在IP数据网络上传输,并通过同步协议保证话音与视频的同步,可以在保证话音数据无延时传输的同时得到相对稳定的视频流。测试结果表明,话音与视频数据同步延时小于50ms。Traditional video telephone transports voice data and video data on IP network. IP network is a burst network, which could block voice transportation on unpredictable times and make the service quality unsatisfactory. Based on the dual- network combination, which transport voice data on PSTN network and video data on IP network, and a synchronization protocol is defined to synchronize the voice data and video data, the proposed schema in this paper could transport voice data in a blockless way with a satisfactory video stream. Test shows that the synchronization time of voice and video is lower than 50ms.

关 键 词：可视电话 无堵塞 话音视频同步 H.264 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]