【作者】 刘东； 杜明辉；

【Author】 LIU DONG~(1)),DU MINGHUI~(2)) 1)2)(School of Electronic and Information Engineering,South China University of Technology,,Guangzhou,510640)

【机构】 华南理工大学电子与信息学院；

【摘要】 分布式视频编码中边信息的重建质量直接影响整个编码器的率失真性能。为了提高分布式视频编码的边信息重建质量,提出了一种新的基于块的边信息生成方案,通过将运动补偿内插技术和编码端提供附加信息技术相结合,在两种模式下产生边信息:第一种模式对应运动补偿帧内插技术:第二种模式对应运动补偿质量增强技术,在该模式下,低质量的帧内块由编码端传送到译码端,并在参考帧的帮助下通过运动估计来生成边信息。实验结果表明,与现有分布式视频编码技术相比,尤其对于运动剧烈的视频序列和较大图像组长度,明显提高了系统的率失真性能。更多还原

【Abstract】 The quality of side information(SI) influences the overall Rate-Distortion(RD) performance of the Distributed Video Coding(DVC) codec.In order to optimize the RD performance of DVC by improving the quality of SI, a novel framework to generate SI at the block level in two modes is proposed:while the first mode corresponds to MCFI technique,the second mode corresponds to a motion compensated quality enhancement(MCQE) technique where a low quality Intra block sent by the encoder is used to generated the SI by doing motion estimation with the help of the reference frames.Simulations have shown a significant gain in the RD performance when compared with the state-of-the-art DVC,especially for high motion video sequences and long group of pictures(GOP) sizes.更多还原