基于已重建先验信息的VVC快速仿射运动估计算法

Fast Affine Motion Estimation Algorithm for VVC Based on Reconstructed Prior Information

针对H.266/多功能视频编码(Versatile Video Coding,VVC)帧间仿射运动估计复杂度高的问题,提出了一种基于已重建先验信息的快速仿射运动估计算法。该算法利用帧间跳过(Skip)模式和仿射运动估计(Affine)模式之间的互斥性,根据上层级编码块(Coding Unit,CU)、本层级子CU和相邻CU的重建信息跳过冗余的仿射运动估计过程,以降低仿射运动估计的复杂度。实验结果表明,在不明显影响视频码率和质量的情况下,该算法的编码时间相较于VVC标准整体下降了10.17%,仿射运动估计时间下降了44.2%,有效地降低了仿射运动估计的复杂度。

In order to solve the problems of high complexity in the affine motion estimation in H.266/VVC(Versatile Video Coding)inter prediction,a fast affine motion estimation algorithm based on reconstructed prior information is proposed.By using the mutual exclusion between Skip mode and Affine mode,the redundant affine motion estimation process is skipped according to the reconstruction information of the upper-level CU(Coding Unit),the sub-CU of this level and the neighboring CU,so as to reduce the computational complexity of affine motion estimation.The experimental results indicate that the coding time of the algorithm is reduced by 10.17%and the affine motion estimation time is reduced by 44.2%compared with the VVC standard without significantly affecting the video bit rate and quality,which effectively reduces the complexity of affine motion estimation.