Fast Depth Intra Coding Based on Decision Tree in 3D-HEVC

IEEE Access

Yui-Lam Chan¹  Sik-Ho Tsang¹  Chang-Hong Fu²  Hong Hong²  Xiaohua Zhu²  Hao Chen² 

[1] Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong;School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China;

关键词: 3D-HEVC;    CU size decision;    decision tree;    Gini thresholds;    depth intra coding;    fast mode decision;   

DOI  :  10.1109/ACCESS.2019.2956994

来源: DOAJ

【 摘 要 】

The coding units (CU) partitioning in the 3D extension of the high efficiency video coding standard (3D-HEVC) is recursively conducted on different block sizes from 64 × 64 to 8 × 8. Besides, the depth coding in 3D-HEVC introduces several new coding tools for each CU to improve the coding efficiency, however, with great computational complexity. It is noted that only a small number of the CUs in recursive partitioning are encoded into the final bitstream. Among these CUs, the CUs with Intra 2N × 2N or Intra N x N as optimal modes have a very small proportion. In this paper, we thus propose an early determination of depth intra coding, where the coding stage of Intra 2N × 2N, Intra N × N or CU Splitting for the CUs could be early skipped based on several Decision Trees. Simulation results show that, with restrict the results from the tree leaves by different Gini thresholds, the proposed algorithm could save 41.14%-71.63% of the depth coding time with only a slight increase in BDBR.

【 授权许可】

Unknown