| 面向无线信道的H.26L编码模式判决策略 |
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| 引用本文： | 陈川,余松煜,熊红凯. 面向无线信道的H.26L编码模式判决策略[J]. 上海交通大学学报, 2003, 37(8): 1303-1307 |
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| 作者姓名： | 陈川 余松煜 熊红凯 |
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| 作者单位： | 上海交通大学,图像通信与信息处理研究所,上海,200030 |
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| 摘 要： | 在对H．26L视频编码中帧内帧间宏块编码失真和传输误码失真及扩散的理论分析基础上，提出了一种面向无线信道的H．26L编码模式率失真优化判决策略。考虑在编码模式选择时结合信道误码扩散模型，通过简化的率失真判决策略，使编码视频流具有很好的自适应误码恢复能力，且计算复杂度较低。典型无线信道环境中的测试结果表明，在增加不多计算量的情况下，该算法比传统方法具有更强的抗误码鲁棒性。
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| 关 键 词： | 编码模式 帧内刷新 误码恢复 率失真 |
| 文章编号： | 1006-2467(2003)08-1303-05 |
| 修稿时间： | 2002-09-01 |
An H. 26L Mode Decision Scheme over Wireless Channel |
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| CHEN Chuan,YU Song-yu,XIONG Hong-kai. An H. 26L Mode Decision Scheme over Wireless Channel[J]. Journal of Shanghai Jiaotong University, 2003, 37(8): 1303-1307 |
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| Authors: | CHEN Chuan YU Song-yu XIONG Hong-kai |
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| Abstract: | This paper proposed a rate-distortion(RD) based optimal macroblock(MB) intra/inter-mode decision scheme for H.26L video stream over wireless channel. Based on the statistics model of error propagation, this work adopts a reduced complexity mode selecting scheme. It can come up with more error robust video stream than the conventional H.26L mode decision algorithm with a modest computational complexity. The simulation results under typical 3GPP/3GPP2 channel condition demonstrate that the proposed scheme can achieve a good balance between compression efficiency and error robustness. |
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| Keywords: | code-mode intra-refresh error resilience rate-distortion |
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