| 一种面向无线视频流的包调度算法 |
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| 引用本文： | 牛建伟,何锐,胡建平.一种面向无线视频流的包调度算法[J].北京航空航天大学学报,2004,30(11):1066-1070. |
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| 作者姓名： | 牛建伟 何锐 胡建平 |
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| 作者单位： | 1.北京航空航天大学 电子信息工程学院 北京 100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 以终端系统为研究对象,给出了一种端到端的无线网络视频流系统结构.在一个GOP(Group Of Picture)中,各个视频包VP(Video Packet)对视频解码质量影响不同,据此定义了视频帧 的重要性系数.在此基础上提出了一种基于视频帧重要性的无线视频流包调度算法WV SPSA(Wireless Video Streaming oriented Packet Scheduling Algorithm),该算法能够根据视频帧的重要性动态调整视频帧的发送次序.仿真结果表明,所提出的视频流系统结构合理,WVSPSA算法性能优于目前主流的EDF(Earliest Deadline First )算法.
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| 关 键 词： | 无线视频 视频传输 视频压缩 WVSPSA算法 H.264 |
| 文章编号： | 1001-5965(2004)11-1066-05 |
| 收稿时间： | 2004-06-25 |
| 修稿时间： | 2004年6月25日 |
Wireless video streaming oriented packet scheduling algorithm |
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| Niu Jianwei,He Rui,Hu Jianping.Wireless video streaming oriented packet scheduling algorithm[J].Journal of Beijing University of Aeronautics and Astronautics,2004,30(11):1066-1070. |
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| Authors: | Niu Jianwei He Rui Hu Jianping |
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| Institution: | 1.School of Electronics and Information Engineering, Beijing Unive rsity of Aeronautics and Astronautics, Beijing 100083, China2. School of Computer Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | Based on end-system, an end-to-end wireless video streaming architecture was proposed. The video frame importance was defined in terms of the contribution of the VP(video packet) to the decompression video quality within a GOP(Group Of Picture). Based on this concept, a WVSPSA(wireless video streaming oriented packet scheduling algorithm) was proposed, which could dynamically re-order the transmission schedule of the VPs according to the VPs' importance. Simulation results show that the video streaming architecture is practical, and WVSPSA algorithm outperforms the prevalent EDF algorithm. |
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| Keywords: | H 264 |
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