Fast mode decision and PU size decision algorithm for intra depth coding in 3D-HEVC |
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| Affiliation: | 1. Joint Laboratory of High Speed Multi-source Image Coding and Processing, Xidian University, Xian 710071, China;2. Southwest University of Science and Technology, Mianyang 621010, China;3. GuangDong University of Technology, Guangzhou 510006, China;1. Indian Institute of Information Technology Chittoor, Sri City, India;2. Indian Institute of Information Technology Allahabad, India;1. National Institute of Telecommunications and ICT, Oran, Algeria;2. PRISME Laboratory, University of Orléans, France;3. XLIM Laboratory, University of Poitiers, France;1. School of Info. and Cont. Eng., China Univ. of Mining and Technology, China;2. School of Info. and Elec. Eng., Jiangsu Vocational College of Business, China;3. The State Info. Center of P.R. China, China;4. BJUT Faculty of Info. Tech., Beijing University of Technology, China;1. College of Information and Control Engineering, China University of Petroleum (East China), Qingdao 266580, China;2. Advanced Analytics Institute, University of Technology Sydney, Sydney 2007, Australia;3. School of Information Science and Engineering, Yunnan University, Kunming 650091, China;4. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;5. Chinese University of Hong Kong, Shatin, Hong Kong |
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| Abstract: | In 3D video extension of High-Efficiency-Video-Coding (3D-HEVC), intra depth coding involves huge computational complexity for the added depth modeling modes (DMMs) and the new complex processing flow. This paper proposes an algorithm including the fast mode and prediction unit (PU) size decisions to accelerate the intra depth coding. For the mode decision, after a modification of the processing flow, three strategies are adopted: (1) evaluation results for intra conventional modes (ICMs) are utilized to determine whether DMMs are skipped; (2) with a predicted direction from ICMs, a golden ratio method is adopted to simplify the DMMs searching; and (3) fast Planar mode decision is made by analyzing the relationship of DMMs and Planar mode. For the fast PU size decision, evaluation costs of ICMs and DMMs, with combination of some trained thresholds, are used to make decisions. Experimental results show the overall algorithm reduces 63.00% computational complexity, with 1.04% BD-rate increasing. |
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| Keywords: | 3D-HEVC Mode decision PU size decision Fast algorithm |
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