Fast CU Partition and Intra Mode Decision Method for H.266/VVC
Fast CU Partition and Intra Mode Decision Method for H.266/VVC
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H.266/VVC的快速CU划分和帧内模式决策方法
DOI：
10.1109/access.2020.3004580
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发表时间：
2020-01-01
期刊：
影响因子：
3.9
通讯作者：
Jiang, Bin
中科院分区：
文献类型：
--
作者：
Zhang, Qiuwen;Wang, Yihan;Jiang, Bin
通用视频编码（H.266/VVC）标准是由联合视频探索小组（JVET）开发的。与上一代视频编码标准相比，H.266/VVC具有更突出的特点。由于H.266/VVC引入了包括二叉树（BT）和三叉树（TT）在内的多类型树（MTT）结构，在提高编码效率的同时也增加了编码复杂度。此外，帧内预测模式从35种增加到67种，这可以提供比H. 265/高效视频编码（HEVC）更准确的预测。因此，这些可以提高编码质量，但增加了计算复杂度。为了降低计算复杂度，设计了一种快速编码单元划分和帧内模式选择算法，包括基于随机森林分类器模型的快速编码单元划分和基于纹理区域特征的快速帧内预测模式优化。仿真结果表明，该方案在BDBR仅增加0.93%的情况下，可以节省54.91%的编码时间。
The Versatile Video Coding (H.266/VVC) standard has developed by Joint Video Exploration Team (JVET). Compared with the previous generation video coding standard, the H.266/VVC is more outstanding. Since the H.266/VVC introduces multi-type tree (MTT) structure including binary tree (BT) and ternary tree (TT), which brings the significant coding efficiency but increases coding complexity. Moreover, the intra prediction modes have increased from 35 to 67, which can provide more accurate prediction than H.265/High Efficiency Video Coding (HEVC). Therefore, these can improve the encoding quality, but increase computational complexity. To reduce the computational complexity, this paper designs a fast coding unit (CU) partition and intra mode decision algorithm, which includes fast CU partition based on random forest classifier (RFC) model and fast intra prediction modes optimization based on texture region features. Simulation results indicate that the proposed scheme can save 54.91% encoding time with only 0.93% increase in BDBR.