| 一种新的无线视频传输帧内刷新策略 |
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| 引用本文： | 冯秀波,谢剑英.一种新的无线视频传输帧内刷新策略[J].东南大学学报,2004,20(2):148-152. |
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| 作者姓名： | 冯秀波 谢剑英 |
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| 作者单位： | 上海交通大学自动化系，上海200030 |
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| 摘 要： | 首先分析了无线信道突发性出错和二阶Markov无线信道模型. 根据该模型和视频编码器的编码方式推导了突发性出错引起的帧内编码和帧间编码的信道失真. 然后提出了一种新的速率失真率(R-D)框架内的帧内刷新策略. 该策略一方面对无线视频传输系统的容错性能和编码效率进行了优化, 另一方面可有效阻止帧间错误传播, 减小信道失真. 在不同传输信道中的仿真结果验证了该策略在无线视频传输容错方面的性能改进.
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| 关 键 词： | 帧内刷新 速率失真率 容错 Markov信道模型 反馈 |
A novel intra refresh scheme for wireless video transmission |
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| Feng Xiubo,Xie Jianying.A novel intra refresh scheme for wireless video transmission[J].Journal of Southeast University(English Edition),2004,20(2):148-152. |
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| Authors: | Feng Xiubo Xie Jianying |
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| Abstract: | The burst error of wireless channels and the two-state Markov wireless model are analyzed. Based on this model and the coding modes of the video encoder,the channel distortion of inter-coding and intra-coding due to burst error is deduced. Then we propose a novel intra refresh scheme in rate-distortion (R-D) framework. This scheme optimizes the error resilience and coding efficiency of wireless video transmission system. It can also stop error propagation and reduce channel distortion effectively. Simulations under different channel conditions verify the improvements of the proposed scheme with respect to error resilience for wireless video communication. |
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| Keywords: | intra refresh rate-distortion error resilience Markov channel model feedback |
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