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Fast intra coding unit decision for high efficiency video coding based on statistical information

Title
Fast intra coding unit decision for high efficiency video coding based on statistical information
Author
정제창
Keywords
High-efficiency video coding (HEVC); Fast coding unit size decision; Online learning algorithm; Bayes decision; Quadratic discriminant analysis (QDA); Video compression
Issue Date
2017-07
Publisher
ELSEVIER SCIENCE BV
Citation
SIGNAL PROCESSING-IMAGE COMMUNICATION, v. 55, page. 121-129
Abstract
The latest video coding compression standard is known as high efficiency video coding (HEVC). It supports high resolution video sequences and has better coding performance than the,previous standard H.264/AVC. A quad tree based coding unit (CU) partitioning process is one of the most efficient technologies used in an HEVC encoder. A coding tree unit (typically 64 x 64) can be split into smaller CUs based on rate-distortion optimization, allowing various types of video content to be adaptively compressed. In addition, intra prediction of the HEVC standard supports 35 prediction modes (planar, DC, and 33 angular modes) to improve coding efficiency. However, the computational complexity of HEVC encoder becomes a critical problem when implement with an encoder. Thus, a fast CU size decision algorithm for intra prediction of an HEVC encoder is proposed in this study. We utilize image complexity and an adaptive depth prediction for early split CU decision making. In addition, the Bayesian decision rule and quadratic discriminant analysis are used for early termination of the CU partitioning process. Experimental results show that our proposed algorithm considerably reduces encoding time by approximately 55.47% with only a small BD-BR loss (1.01%) compared to the HEVC reference software HM 16.0.
URI
https://www.sciencedirect.com/science/article/abs/pii/S0923596517300541?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/114920
ISSN
0923-5965; 1879-2677
DOI
10.1016/j.image.2017.03.019
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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