Dr. Xue bin Sun Profile

Dr. Xue bin Sun

at Tianjin Univ

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Proceedings Article | 10 April 2018 Paper

An efficient CU partition algorithm for HEVC based on improved Sobel operator

Xuebin Sun, Xiaodong Chen, Yong Xu, Gang Sun, Yunsheng Yang

Proceedings Volume 10615, 1061544 (2018) https://doi.org/10.1117/12.2302920

KEYWORDS: Copper, Computer programming, Video, Video coding, Algorithm development, Video compression, Standards development, Quantization

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As the latest video coding standard, High Efficiency Video Coding (HEVC) achieves over 50% bit rate reduction with similar video quality compared with previous standards H.264/AVC. However, the higher compression efficiency is attained at the cost of significantly increasing computational load. In order to reduce the complexity, this paper proposes a fast coding unit (CU) partition technique to speed up the process. To detect the edge features of each CU, a more accurate improved Sobel filtering is developed and performed By analyzing the textural features of CU, an early CU splitting termination is proposed to decide whether a CU should be decomposed into four lower-dimensions CUs or not. Compared with the reference software HM16.7, experimental results indicate the proposed algorithm can lessen the encoding time up to 44.09% on average, with a negligible bit rate increase of 0.24%, and quality losses lower 0.03 dB, respectively. In addition, the proposed algorithm gets a better trade-off between complexity and rate-distortion among the other proposed works.

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