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中文摘要：
H．264／AVC中slice的各个数据分割部分和GOP内不同编码类型的帧对视频恢复质量影响不同．根据这一特性，提出一种度量GOP内不同帧中各个数据分割部分重要性的失真推导算法，再利用所得的重要性提出一种与视频内容和信道条件都自适应适配的GOP级视频传输方法．度量重要性所使用的失真推导算法考虑了由误码扩散和误码掩盖引入的失真．实验结果表明，使用推导算法计算所得的失真与仿真所得的失真基本吻合，与基于slice数据分割的视频传输方法相比，所提出的GOP级视频传输方法提高了视频恢复质量，最好可提高2dB以上．
英文摘要：
In H. 264/AVC, different partition parts in one slice and different types of coded frame in one GOP are of unequal importance to the reconstructed video quality. Based on these characteristics, a distortion derivation algorithm for evaluating the importance of different partition parts of different frames is presented. Moreover, a video content and channel adaptive video transmission scheme is proposed based on the determined importance, in which priority sorting is adaptively adjusted to match the characteristics of video content and current channel condition. The distortion derivation algorithm for determining the importance takes into account the total distortion caused by error propagation and error concealment. Experimental results demonstrate that the distortion derived accords with the distortion in simulation, and that the video transmission scheme based on the proposed priority sorting method improves the reconstruction video quality by more than 2 dB compared with the video transmission scheme based on data partitioning in one slice.
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