基于H.264-SVC编码结构优化的差错恢复编码方法

提出了一种在丢包环境下的基于H.264-SVC扩展的率失真（RD－rate distortion）优化的宏块模式判决模型。在编码器中，在基于块的基础上综合考虑了信源编码失真、时间可分级的等级B图像编码结构和误差扩散失真。在当前的H.264-SVC的丢包环境下宏块模式判决模型的基础上，结合H.264-SVC的等级B图像编码结构的特点，一个时间级的参数被加入到RD代价函数的计算中。实验结果表明，本方法比没有经过时间可分级编码结构优化的的差错恢复率失真模型的差错恢复性能要好。

Error Resilient Video Coding in H.264-SVC extension

An efficient decision algorithm of the rate-distortion(RD) optimized macroblock mode for scalable video coding(SVC) extension based on H.264 in packet loss environment is presented.A parameter used for temporal level optimization is added into the RD model.Source-coding distortion and error-propagated distortion of each frame are calculated on a encoding block basis after the frame is encoded,which will be stored in a distortion mapping table to calculate the end-to-end distortion of the next frame.The simulation results show that the proposed algorithm has better performance than the original method in terms of error resilience.