基于空间信息的多终端融合视频指挥系统设计  

Design of video command system with multi terminal based on spatial information

作　　者：刘丹[1] 张国永[1] 田银枝 张剑波[3] 

机构地区：[1]北京合众思壮科技股份有限公司公共安全业务中心,北京100015 [2]北京超图信息技术有限公司专用事业部,北京100015 [3]中国地质大学(武汉)信息工程学院,湖北武汉430074

出　　处：《计算机工程与设计》2014年第6期2255-2260,F0003,共7页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2012AA12A201)

摘　　要：为了构建基于实时视频和空间位置的指挥系统,提出了通过将音频、视频和空间位置信息进行统一融合的设计方法。基于视频指挥跨网络和跨终端的特点,制定了能满足不同平台间通讯传输的统一数据协议和编码规则,提出了中心服务器实现信息中转和维护终端间数据通道的设计思路,完成了音视频和空间数据通过RTP/RTCP协议扩展进行混合打包的模型算法设计,最终形成终端多样采集、服务器同步转发和分步解码展示的闭环处理流程。实验结果表明,音频流融合空间信息的传输效果不受到影响,并且扩展能力更强。To construct the command system based on real-time video and space location,the design method of integration of audio,video and spatial location information was put forward.Based on the characteristics of crossing network and terminal in video command,the uniform data protocol and encoding rules were designed to meet demand of communication between different platforms.The design ideas of central server realizing information transfer and data channel maintenance between terminals were analyzed.The design model algorithm of packing audio and video as well as spatial data by RTP/RTCP protocol extension was provided.The closed loop process of terminal diversity acquisition,synchronization server forwarding and step-by-step decoding display was proposed.Through test it was proved that the transmission effect of fusion of audio stream and spatial information was not affected,and the system had stronger expansion ability.

关 键 词：视频指挥 实时传输协议 实时传输控制协议 编解码 空间信息 第三代移动通信技术 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]