【摘要】 分布式视频编码是一种新的编码结构,它主要是在解码端利用信源的统计特性获得有效的压缩。在分布式视频编码中,边信息质量对整个系统编码效率的提高起着至关重要的作用。在研究了现有边信息构造方法基础上,提出了一种有效的自适应边信息帧内插方法。利用相邻关键帧与当前帧的时间相关性,按一定的准则计算相应的帧间和块间的时间相关系数,然后根据时间相关性不同采用不同加权系数的运动补偿帧内插算法提高边信息的质量。实验结果表明在几乎不增加编码器负担的情况下重建边信息的质量平均提高了2.47dB。更多还原

【Abstract】 Distributed video coding(DVC) is a new coding paradigm that gives decoder to exploit the source statistic to achieve efficient compression.In DVC system, side information plays an important role to reconstruct the Wyner-Ziv frames.To generate the good side information, an adaptive frame interpolation side information algorithm with correlation coefficient for DVC was proposed.Using temporal correlation coefficient between WZ frames and key frames, different weighted values were adopted to reconstruct the side information.Simulation results show that the proposed algorithm can averagely produce 2.47dB improvement in the PSNR of side information.更多还原