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Adaptive fast intra prediction for high efficiency video coding

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Abstract

In this paper, a fast intra prediction algorithm for High Efficiency Video Coding (HEVC) is proposed by adopting the mode correlation between adjacent coding units. The proposed approach is realized by two pieces. Firstly, the prediction mode and partition structure for the current coding unit will inherit its optimal prediction coding unit directly if the Structural Similarity (SSIM) between the adjacent coding units satisfies the threshold condition. Secondly, unless the first case occurs, a two-step rough mode decision with adaptive threshold method including Sum of Absolute Difference (SAD) and Sum of Absolute Hadamard Transformed Difference (SATD) criterions is used to accelerate intra mode decision process based on HEVC test Model (HM) encoder. Besides, the most probable mode (MPM) which refers to the optimal prediction mode of the coded left and upper Prediction Units (PUs) surrounding the current PU is also considered. Experimental results show that the proposed algorithm can save 30.18 % encoding time on average with negligible loss of coding efficiency compared with HM10.0. The complexity and the bitrate are reduced by 11.45 and 0.46 % respectively compared with coding tree pruning method.

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Acknowledgments

This research is funded by the National Natural Science Foundation of China (NSFC) under grants No. 61375025, No. 61075011, and No. 60675018, also the Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry of China. We express our appreciations to the reviewers for their through review and very helpful comments, which help improving this paper.

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Authors and Affiliations

  1. Department of Measurement Control and Information Technology, School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing, 100191, China

    Shiping Zhu, Dongyu Zhao & Liyun Li

  2. CSR Qingdao Sifang Locomotive and Rolling Stock Co., Ltd., No. 88, Jinhong East Road, Chengyang District, Qingdao, Shandong Province, 266111, China

    Dongyu Zhao

  3. Lenovo (Beijing) Co., Ltd., No. 6, Shangdi West Road, Haidian District, Beijing, 100085, China

    Liyun Li

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  1. Shiping Zhu
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  2. Dongyu Zhao
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  3. Liyun Li
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Correspondence to Shiping Zhu.

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Zhu, S., Zhao, D. & Li, L. Adaptive fast intra prediction for high efficiency video coding. Multimed Tools Appl 75, 7559–7573 (2016). https://doi.org/10.1007/s11042-015-2677-3

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  • DOI: https://doi.org/10.1007/s11042-015-2677-3

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