Adaptive Progressive Motion Vector Resolution Selection Based on   Rate-Distortion Optimization

doi:10.1109/TIP.2016.2627814

CORC > 北京大学 > 信息科学技术学院

	Adaptive Progressive Motion Vector Resolution Selection Based on Rate-Distortion Optimization
	Wang, Zhao ; Wang, Shiqi ; Zhang, Jian ; Ma, Siwei
刊名	IEEE TRANSACTIONS ON IMAGE PROCESSING
	2017
关键词	Motion vector resolution rate-distortion model decision tree rate-distortion optimization motion compensation VIDEO PREDICTION ALLOCATION ACCURACY HEVC
DOI	10.1109/TIP.2016.2627814
英文摘要	In the state-of-the-art H. 265/HEVC video coding standard, the motion vector (MV) resolution is fixed to be 1/4-pel for the entire video sequence, while the inherent video characteristics, e.g., texture complexities and motion activities, have been largely ignored. Obviously such strategy may not suffice the demand of high-accuracy motion compensation. In this paper, we propose a specially designed rate-distortion model in terms of the MV resolution by taking the video characteristics into consideration. In particular, the MV resolution selection is formulated as a rate-distortion optimization problem by analyzing the rate-distortion cost of each MV resolution candidate. To further improve the coding performance, the progressive MV resolution strategy is employed, where the optimal progressive MV resolution is determined by decision trees constructed with the rate-distortion model. In this manner, a novel adaptive progressive motion vector resolution selection scheme can be realized and the MV resolution can be adaptively adjusted based on the properties of local content. Extensive experiments and comparisons show that the proposed algorithm significantly improves the coding performance, and 1.8% BD-rate gain on average has been achieved without introducing any noticeable computational complexity.; National Basic Research Program of China (973 Program) [2015CB351800]; National Natural Science Foundation of China [61322106, 61572047, 61632001]; China Postdoctoral Science Foundation; Shenzhen Peacock Plan [2016T90017]; SCI(E); ARTICLE; 1; 400-413; 26
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/476168]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Wang, Zhao,Wang, Shiqi,Zhang, Jian,et al. Adaptive Progressive Motion Vector Resolution Selection Based on Rate-Distortion Optimization[J]. IEEE TRANSACTIONS ON IMAGE PROCESSING,2017.
APA	Wang, Zhao,Wang, Shiqi,Zhang, Jian,&Ma, Siwei.(2017).Adaptive Progressive Motion Vector Resolution Selection Based on Rate-Distortion Optimization.IEEE TRANSACTIONS ON IMAGE PROCESSING.
MLA	Wang, Zhao,et al."Adaptive Progressive Motion Vector Resolution Selection Based on Rate-Distortion Optimization".IEEE TRANSACTIONS ON IMAGE PROCESSING (2017).