| 一种可变码率视频流实时查询方案的实现 |
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| 引用本文： | 葛景国,陈立功,倪纯珍,饶德林,朱政强.一种可变码率视频流实时查询方案的实现[J].上海交通大学学报,2004,38(Z1):140-144. |
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| 作者姓名： | 葛景国 陈立功 倪纯珍 饶德林 朱政强 |
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| 作者单位： | 上海交通大学,材料科学与工程学院,上海,200030 |
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| 摘 要： | 在一种基于H.263协议的以太网数字视频监控系统中,为实现实时视频查询,设计了一套基于用户数据报协议的数据包格式,保证了上层应用程序的可靠性.实现一个支持可变码率视频的缓冲区,分析了其内部实现机制.建立视频的秒级索引,实现了实时视频流的秒级查询和回放.分析了实时视频查询误差产生的原因.经过长时间测试,证明系统稳定可靠,缓冲区参数选择正确,设计方案合理.
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| 关 键 词： | 可变码率 视频监控 H.263编解码协议 视频缓冲区 |
| 文章编号： | 1006-2467(2004)S1-0140-05 |
| 修稿时间： | 2003年10月11 |
An Implementation of Variable Bit-Rate Video Stream Real-Time Querying Scheme |
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| GE Jing-guo,CHEN Li-gong,NI Chun-zhen,RAO De-lin,ZHU Zheng-qiang.An Implementation of Variable Bit-Rate Video Stream Real-Time Querying Scheme[J].Journal of Shanghai Jiaotong University,2004,38(Z1):140-144. |
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| Authors: | GE Jing-guo CHEN Li-gong NI Chun-zhen RAO De-lin ZHU Zheng-qiang |
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| Abstract: | In order to implement real-time video querying in an Ethernet digital video monitoring system based on H.263 protocol, a set of data-packet format was designed based on UDP (User Datagram Protocol), which assures the reliability of the system. A video buffer was implemented which supports variable bit-rate video, the inner mechanism was analyzed. The second-level index was established, and the second-level querying and playing back of real time video stream were realized. The reason of the error of real time video querying was analyzed. A long time testing was carried out and the result shows that the system is very stable and the parameters of the buffer are selected rightly, the scheme design is sound. |
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| Keywords: | variable bit-rate video monitoring H 263 codec video buffer |
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