中文摘要：

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.

英文摘要：

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.