Low complexity inter coding scheme for Versatile Video Coding (VVC)
Low complexity inter coding scheme for Versatile Video Coding (VVC)
复制标题
适用于通用视频编码 (VVC) 的低复杂度帧间编码方案
DOI：
10.1016/j.jvcir.2022.103683
复制
发表时间：
2022-11-19
影响因子：
2.6
通讯作者：
Zuo, Yifan
中科院分区：
文献类型：
--
作者：
Shang, Xiwu;Li, Guoping;Zuo, Yifan
由联合视频专家组（JVET）和视频编码专家组（VCEG）开发的最新编码标准通用视频编码（VVC）已于2020年定稿。通过引入几种新的编码技术，VVC的压缩效率比H.265/HEVC提高了50%。但编码复杂度急剧增加，影响了其实时应用。为了解决这个问题，提出了一种利用编码信息的快速帧间编码算法，以加快编码过程。首先，通过分析相邻CU的编码区域，预测当前CU的编码区域以终止不必要的分裂模式。然后，在预测过程中产生的时间上最优的编码模式被进一步用于缩小候选模式以加速编码过程。最后，利用相邻预测模式的分布来衡量当前编码单元的运动复杂度，基于此可以更早地跳过不必要的预测模式。实验结果表明，该方法可使编码复杂度平均降低40.08%，BDPSNR降低0.07dB，BDBR提高1.56%，优于现有方法。
The latest coding standard Versatile Video Coding (VVC) developed by the Joint Video Experts Team (JVET) and Video Coding Experts Group (VCEG) was finalized in 2020. By introducing several new coding techniques, VVC improves the compression efficiency by 50% compared with H.265/HEVC. However, the coding complexity increases dramatically, which obstructs it from real-time application. To tackle this issue, a fast inter coding algorithm utilizing coding information is proposed to speed up the coding process. First, by analyzing the coding areas of the neighboring CUs, we predict the coding area of the current CU to terminate unnecessary splitting modes. Then, the temporally optimal coding mode generated during the prediction process is further utilized to shrink the candidate modes to speed up the coding process. Finally, the distribution of neighboring prediction modes are exploited to measure the motion complexity of the current CU, based on which the unnecessary prediction modes can be skipped earlier. Experimental results demonstrate that the proposed method can reduce the coding complexity by 40.08% on average with 0.07 dB BDPSNR decrease and 1.56% BDBR increase, which outperforms the state-of-the-art approach.