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《Computer Engineering and Design》 2014-06
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Design of video command system with multi terminal based on spatial information

LIU Dan;ZHANG Guo-yong;TIAN Yin-zhi;ZHANG Jian-bo;Department of Public Security,Beijing UniStrong Science and Technology Limited Company;Department of Army,Beijing SuperMap Information Technology Limited Company;College of Information Engineering,China University of Geosciences;  
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.
【Fund】: 国家863高技术研究发展计划基金项目(2012AA12A201)
【CateGory Index】: TP311.521
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