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Novel intra prediction via position-dependent filtering

文献类型：期刊论文

作者Zhang, Li2; Zhao, Xin3,4; Ma, Siwei1,2; Wang, Qiang5; Gao, Wen2
刊名JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
出版日期2011-11-01
卷号22期号:8页码:687-696
关键词H.264 Image coding Intra prediction Interpolation filtering Least square method Mode-dependent directional transform (MDDT) KTA Singular value decomposition
ISSN号1047-3203
DOI10.1016/j.jvcir.2010.11.003
英文摘要This paper presents a novel intra prediction algorithm, named position-dependent filtering (PDF), to improve the intra prediction accuracy. Different from the existing schemes where the samples along one prediction direction are predicted with the same set of filtering coefficients, in the proposed PDF, position-dependent filtering coefficients are employed, i.e., different sets of filtering coefficients are pre-defined for samples with different coordinates in one coding block. For each intra prediction mode, the set of linear filtering coefficients for each position within one block is obtained from off-line training using the least square method. Moreover, to further reduce the algorithm complexity, a simplified PDF (sPDF) is proposed. In sPDF, only a subset of reference samples are used for prediction and the others are discarded because of the minor contribution to intra prediction. The proposed algorithm has been implemented in the latest ITU-T VCEG KTA software. Experimental results demonstrate that, compared with the original KTA with new intra coding tool enabled, up to 0.53 dB of average coding gain is achieved by the proposed method, while applicable computational complexity is retained for practical video codecs. (C) 2010 Elsevier Inc. All rights reserved.
资助项目National Natural Science Foundation of China[60833013] ; National Natural Science Foundation of China[60803068] ; National Basic Research Program of China (973 Program)[2009CB320903]
WOS研究方向Computer Science
语种英语
WOS记录号WOS:000296223200001
出版者ACADEMIC PRESS INC ELSEVIER SCIENCE
源URL[http://119.78.100.204/handle/2XEOYT63/12763]  
专题中国科学院计算技术研究所期刊论文_英文
通讯作者Zhang, Li
作者单位1.Beijing Univ Aeronaut & Astronaut, State Key Lab Virtual Real Technol & Syst, Beijing 100083, Peoples R China
2.Peking Univ, Inst Digital Media, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Inst Comp Technol, Key Lab Intelligent Informat Proc, Beijing, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
5.State Adm Radio Film & Televis, Acad Broadcasting Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Li,Zhao, Xin,Ma, Siwei,et al. Novel intra prediction via position-dependent filtering[J]. JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION,2011,22(8):687-696.
APA Zhang, Li,Zhao, Xin,Ma, Siwei,Wang, Qiang,&Gao, Wen.(2011).Novel intra prediction via position-dependent filtering.JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION,22(8),687-696.
MLA Zhang, Li,et al."Novel intra prediction via position-dependent filtering".JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION 22.8(2011):687-696.

入库方式： OAI收割

来源：计算技术研究所

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