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Fast intra-mode decision for depth map coding in 3D-HEVC

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Abstract

3D-high efficiency video coding (3D-HEVC) contains more encoding viewpoints than traditional HEVC, resulting in a significant increase of coding complexity. In this paper, we propose a low complexity intra mode decision algorithm to reduce the number of intra modes by detecting the flat area and texture direction of the depth map. The corresponding intra prediction modes are skipped when the flat region condition is satisfied. Otherwise, the direction of the edge is detected to decrease the number of angle modes in rough mode decision, which can reduce the intra-coding complexity and coding time cost. Experimental results demonstrate that the proposed algorithm achieves on average 36.48% time saving with negligible degradation of coding performance.

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Acknowledgements

This paper is supported by the Project for the National Natural Science Foundation of China under Grants no. 61672064, the Beijing Natural Science Foundation under Grant no. 4172001, and Beijing Laboratory of Advanced Information Networks under Grants no. PXM2019_014204_500029.

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Authors and Affiliations

  1. Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China

    Ruyi Zhang, Kebin Jia, Pengyu Liu & Zhonghua Sun

  2. Beijing Key Laboratory of Computational Intelligence and Intelligent System, Beijing University of Technology, Beijing, 100124, China

    Ruyi Zhang, Kebin Jia, Pengyu Liu & Zhonghua Sun

Authors
  1. Ruyi Zhang
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  2. Kebin Jia
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  3. Pengyu Liu
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  4. Zhonghua Sun
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by RZ and KJ. The first draft of the manuscript was written by RZ and all authors commented on previous versions of the manuscript. The authors (PL and ZS) added after the revision of the manuscript are mainly verify the validity of the new algorithm and edit and review the revised manuscript. All authors read and approved the final manuscript.

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Correspondence to Kebin Jia.

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Zhang, R., Jia, K., Liu, P. et al. Fast intra-mode decision for depth map coding in 3D-HEVC. J Real-Time Image Proc 17, 1637–1646 (2020). https://doi.org/10.1007/s11554-019-00920-8

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