| 基于端到端失真优化的无线视频联合编码方案 |
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| 引用本文： | 赵峰,仲丽媛,荆涛,霍炎.基于端到端失真优化的无线视频联合编码方案[J].北方交通大学学报,2010(6):71-75. |
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| 作者姓名： | 赵峰 仲丽媛 荆涛 霍炎 |
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| 作者单位： | [1]桂林电子科技大学科技处,广西桂林541004 [2]北京交通大学电子信息工程学院,北京100044 [3]上海交通大学电子工程系,上海200240 |
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| 基金项目： | 国家自然科学基金资助项目（60772040 60772042） |
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| 摘 要： | 在无线视频传输环境端到端失真分析的基础上,针对H.264视频流建立了一种新的端到端失真模型.在使用LDPC信道编码方式与该失真分析模型的基础上,提出了一种基于端到端失真优化的联合信源信道编码方案.该方案根据当前无线信道的信噪比与信道带宽等状态信息,自适应地调节信源编码量化参数和信道编码码率,使端到端失真最小.实验结果表明,与固定码率编码相比,本文提出的联合信源信道编码方案可在不增加带宽的情况下显著提高视频传输质量.
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| 关 键 词： | 无线视频传输 联合编码 端到端失真 |
Joint Coding Scheme for Wireless Video Based on End-to-End Distortion Optimization |
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| ZHAO Feng,ZHONG Liyuan,JING Tao,HUO Yan.Joint Coding Scheme for Wireless Video Based on End-to-End Distortion Optimization[J].Journal of Northern Jiaotong University,2010(6):71-75. |
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| Authors: | ZHAO Feng ZHONG Liyuan JING Tao HUO Yan |
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| Institution: | 1.Division of Science and Technology,Guilin University of Electronic Technology,Guilin Guangxi 541004;China;2.School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing 100044,China;3.Shanghai Jiaotong University Electronic Engineering,Shanghai 200240,China) |
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| Abstract: | According to analysis of end-to-end distortion for wireless video transmission,the end-to-end distortion model is presented for H.264 video stream.For the LDPC channel coding and distortion analysis,joint coding scheme based on end-to-end distortion optimization is proposed.In order to reach the minimum end-to-end distortion,the scheme adaptively adjusts the quantization parameters of source coding and channel coding rate,according to the current wireless channel state information.The results of experiments in this paper show that the proposed joint coding is better than the fixed bit-rate coding on video transmission quality without increasing the bandwidth. |
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| Keywords: | wireless video transmission joint coding end-to-end distortion |
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