| 基于PFGS的无线信道传输失真度的研究 |
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| 引用本文： | 刘汝,刘文予,王曜,陈睿.基于PFGS的无线信道传输失真度的研究[J].华中科技大学学报(自然科学版),2004,32(8):63-65. |
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| 作者姓名： | 刘汝 刘文予 王曜 陈睿 |
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| 作者单位： | 1. 华中科技大学,电子与信息工程系,湖北,武汉,430074
2. 香港中文大学,讯息工程系,香港 |
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| 基金项目： | 国家自然科学基金资助项目 (N6 0 372 0 6 7)，国家高技术研究发展计划资助项目 (2 0 0 2AA1 1 90 1 0 ) |
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| 摘 要： | 分析了多媒体无线传输模型，并讨论其中的信源编码失真度Ds、信道传输失真度Dc、系统总体失真度D及其相互的关系．着重研究了多媒体数据信道传输失真度Dc的计算，同时基于精细粒度分层编码的码流特点，提出了一种简单有效的信道传输失真度预测算法．结合PFGS分层编码和t。，bO码，对整个多媒体数据传输进行了仿真，仿真结果表明该预测算法简单准确，精度较高．
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| 关 键 词： | 无线传输 传输失真 PFGS 错误隐藏 |
| 文章编号： | 1671-4512(2004)08-0063-03 |
| 修稿时间： | 2003年11月17 |
A prediction algorithm of wireless channel distortion |
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| Liu Ru Postgraduate, Dept. of Electronics & Information Eng.,Huazhong Univ. of Sci. & Tech.,Wuhan ,China. Liu Wenyu Wang Yao Chen Rui.A prediction algorithm of wireless channel distortion[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2004,32(8):63-65. |
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| Authors: | Liu Ru Postgraduate Dept of Electronics & Information Eng Huazhong Univ of Sci & Tech Wuhan China Liu Wenyu Wang Yao Chen Rui |
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| Institution: | Liu Ru Postgraduate, Dept. of Electronics & Information Eng.,Huazhong Univ. of Sci. & Tech.,Wuhan 430074,China. Liu Wenyu Wang Yao Chen Rui |
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| Abstract: | The model for the wireless multimedia transmission was analyzed; the relationship among source coding distortion Ds, the channel distortion Dc, and the rate distortion of the transmission system D were discussed; the emphasis was put on the algorithm of Dc. Based on the characteristics of the streams from PFGS coding, a simple and effective algorithm was proposed. Due to the combination of PFGS layered coding and Turbo coding with the overall multimedia transmission, the simulation results demonstrated that the algorithm was simple, efficient, accurate, and suitable for various wireless transmission environment. |
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| Keywords: | wireless transmission transmission distortion PFGS error concealment |
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