Fast Coding Unit Size Decision in HEVC Intra Coding

Tao FAN  Guozhong WANG  Xiwu SHANG  

IEICE TRANSACTIONS on Information and Systems   Vol.E99-D   No.7   pp.1953-1956
Publication Date: 2016/07/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2015EDL8231
Type of Manuscript: LETTER
Category: Image Processing and Video Processing
HEVC,  CU,  size decision,  intra coding,  

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The current high efficiency video coding (HEVC) standard is developed to achieve greatly improved compression performance compared with the previous coding standard H.264/AVC. It adopts a quadtree based picture partition structure to flexibility signal various texture characteristics of images. However, this results in a dramatic increase in computational complexity, which obstructs HEVC in real-time application. To alleviate this problem, we propose a fast coding unit (CU) size decision algorithm in HEVC intra coding based on consideration of the depth level of neighboring CUs, distribution of rate distortion (RD) value and distribution of residual data. Experimental results demonstrate that the proposed algorithm can achieve up to 60% time reduction with negligible RD performance loss.