H.264帧间错误隐藏的运动矢量恢复

Motion vector recovery for inter-frame error concealment in H.264

针对视频传输中宏块受损引起的视频质量下降问题,兼顾隐藏效果和计算复杂度,采用交错的加权二次隐藏方案对边界匹配算法进行改进,有选择性地引入运动估计过程,并通过设定阈值,在预测块的边界匹配误差过大时采用8×8子块相关性隐藏模式。实验结果表明,采用改进算法,峰值信噪比平均提高1dB左右,解码的视频质量得到明显改善。

Concerning the video quality decline caused by damaged macroblocks in video transmission, this paper modified the boundary matching algorithm by adopting the interlaced weighted double error concealment scheme, inducted the motion vector estimation selectively, and used 8 × 8 subbloeks correlation error concealment mode when the boundary matching error of the predictive block was higher than a given threshold. Experimental results show that the proposed algorithm could averagely raise the PSNR about 1 dB and correspondingly improve the decoded video quality effectively.