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	MODE-DEPENDENT PIXEL-WISE MOTION REFINEMENT FOR HEVC
	Zhao, Lei ; Zhang, Jian ; Ma, Siwei ; Gao, Wen
	2016
关键词	Video coding HEVC pixel-wise motion refinement median filter mode dependent
英文摘要	High efficiency video coding (HEVC) standard is within the block-based hybrid coding framework, which essentially adopts prediction unit (PU) as the basic motion compensation unit. However, in the case of tiny motion, the actual motion vectors (MVs) for each sample may differ from the PU's MV, thus resulting in more residual energy. In this paper, a novel pixel-wise motion refinement method (PMR) is presented by extending the traditional bidirectional optical flow (BIO) to PUs with two unidirectional reference blocks. To get the robust MV for each sample, a median filtering process is introduced to MV shifting values of the neighboring pixels. Furthermore, a PU level mode-dependent pixel-wise motion refinement (MPMR) scheme is also presented to improve the coding performance. Simulation results demonstrate that the proposed method achieves 0.83% bitrate reduction on average for HEVC test sequences under HM12.0 low delay B (LDB) configuration, and achieves up to 4.92% bitrate reduction for sequences with complex motion, e.g. affine motion.; CPCI-S(ISTP); 2022-2026
语种	英语
出处	23rd IEEE International Conference on Image Processing (ICIP)
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/459878]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zhao, Lei,Zhang, Jian,Ma, Siwei,et al. MODE-DEPENDENT PIXEL-WISE MOTION REFINEMENT FOR HEVC. 2016-01-01.

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