Chapter II: Literature Review has outlined the research progresses in Geo Video data model, VideoGIS design and various applications in recent years.
第二章：国内外研究进展，系统总结了近些年地理视频数据模型、视频GIS设计与应用的研究进展。
In this paper, we analyse the features of video data, and present a kind of stratification data model based on segmented.
文章通过分析视频数据的特点，提出了在分段基础上的层次模型和数据库的组织。
At last, it simply introduces the data protocol model of Video Conferencing System.
最后，简要分析了视频会议系统的数据协议模型。
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