The Joint Video Exploration Team (JVET) has started to develop the next-generation video coding standard-H.266/Versatile Video Coding (H.266/VVC) based on H.265/High Efficiency Video Coding (H.265/HEVC) to provide higher compression performance. The H.266/VVC supports the flexible quadtree with a nested multi-type tree (QTMT) partition structure including quadtree (QT), binary tree (BT), and ternary tree (TT). The coding unit (CU) sizes range from 128 to 4 for the luma component or from 64 to 2 for the chroma component in the QTMT splitting structure. The introduction of small CU size, i.e., 2×N, leads to inefficient hardware implementation because it causes pipeline delayed and needs to process 2×N pixels in the hardware architecture. In addition, the inter or bi-predicted of small CU requires a higher memory bandwidth than the bi-predicted of 8×8 CU in H.266/VVC. To solve the above issues, we introduce a fast method to accelerate CU partition and mode decision, including an adaptive CU partition method and early skip mode detection method. The proposed algorithm consists of two parts: (1) adaptive remove 2×N CUs by skipping BT and TT splitting mode; (2) early skip bi-predicted or inter prediction of small CU. The experimental results demonstrate that the proposed scheme can save 47% coding time while maintaining the coding performance.

联合视频探索团队（JVET）已开始开发基于H.265 /高效视频编码（H.265 / HEVC）的下一代视频编码标准-H.266 /多功能视频编码（H.266 / VVC） ）以提供更高的压缩性能。H.266 / VVC支持具有嵌套多类型树（QTMT）分区结构的灵活四叉树，该结构包括四叉树（QT），二叉树（BT）和三叉树（TT）。在QTMT拆分结构中，亮度单位的编码单位（CU）大小范围为128至4，色度分量的范围为64至2。较小的CU大小（即2×N）的引入导致效率低下的硬件实现，因为这会导致流水线延迟，并且需要在硬件体系结构中处理2×N像素。此外，与H.266 / VVC中8×8 CU的双向预测相比，小CU的双向预测或双向预测需要更高的存储带宽。为了解决上述问题，我们介绍了一种快速的方法来加速CU分区和模式决策，包括自适应CU分区方法和早期跳过模式检测方法。该算法包括两部分：（1）通过跳过BT和TT分裂模式自适应地去除2×N CU；（2）早期跳过小CU的双向预测或帧间预测。实验结果表明，该方案在保持编码性能的同时，可以节省47％的编码时间。（1）通过跳过BT和TT拆分模式自适应去除2×N CU；（2）早期跳过小CU的双向预测或帧间预测。实验结果表明，该方案在保持编码性能的同时，可以节省47％的编码时间。（1）通过跳过BT和TT拆分模式自适应去除2×N CU；（2）早期跳过小CU的双向预测或帧间预测。实验结果表明，该方案在保持编码性能的同时，可以节省47％的编码时间。