Sum-of-gradient based fast intra coding in 3D-HEVC for depth map sequence (SOG-FDIC) |
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| Affiliation: | 1. School of Information Science and Engineering, Huaqiao University, Xiamen, China;2. Xiamen Key Laboratory of Mobile Multimedia Communications, Xiamen, China;3. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore;1. College of Computer and Information Engineering, Xiamen University of Technology, Xiamen 361024, China;2. Department of Information Management, Chaoyang University of Technology, Taichung, Taiwan;1. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK;1. College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China;2. Jiangsu Engineering Center of Network Monitoring, Nanjing University of Information Science & Technology, Nanjing 210044, China;1. Institute of Information Science, Beijing Jiaotong University, Beijing Key Laboratory of Advanced Information Science and Network, Beijing 100044, China;2. School of Electronic Information Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;1. Beihang University, Beijing, China;2. Anhui University, Hefei 230601, China;3. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, China |
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| Abstract: | As the latest video coding standard for multi-view plus depth video, 3D-HEVC yields high coding efficiency but at the cost of heavy computational complexity. To reduce the computational complexity, a fast intra coding algorithm based on sum-of-gradient criterion for depth map coding in 3D-HEVC, named SOG-FDIC, is proposed in this paper. Based on the observation that DMM modes and smaller partitioning sizes are rarely used in flat region, sum of gradient is presented to determine whether the current block belongs to the flat region so as to skip unnecessary checking of DMMs and smaller partitioning sizes. Experimental results show that the proposed algorithm can save about 21.8% coding time while keeping almost the same coding efficiency and the reconstructed video quality of depth maps and synthesized views, compared with the original 3D-HEVC. Moreover, it has been verified that the proposed method outperforms the state-of-the-art methods. |
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| Keywords: | 3D-HEVC MVD Intra prediction Low complexity |
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