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研究生： 羅鈺瑩
Lo, Yu-Ying
論文名稱： 一個在PU層加速HEVC編碼的演算法
A Fast PU Level Encoding Method in High Efficiency Video Coding
指導教授： 林永隆
口試委員: 王家祥
郭皇志
學位類別： 碩士
Master
系所名稱： 電機資訊學院 - 資訊工程學系
Computer Science
論文出版年： 2014
畢業學年度： 103
語文別： 英文
論文頁數： 42
中文關鍵詞： HEVC編碼
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    • JCT-VC針對高解析度的影片制訂了新一代的影片壓縮技術−−High Efficiency Video Coding (HEVC)。由於HEVC的quadtree codind block partition structure使得其計算複雜度大大提升，許多方法皆被提出來改善這個問題。而我們的方法則是利用觀察CU mode和PU mode之間的關係，在特定情況下省略部分PU mode的計算來降低複雜度。實驗結果顯示，平均而言，在不太影響影片壓縮品質的情況下大約減少21.2%的壓縮時間。

    Abstract 1 Contents 2 List of Figures 4 List of Tables 6 Chapter 1 Introduction 7 Chapter 2 HEVC Prediction 10 2.1 Partition unit, partition mode, and prediction mode 10 2.2 Mode decision 15 2.2.1 CTU mode decision 16 2.2.2 CU mode decision 18 2.2.3 PU mode decision 20 Chapter 3 Related Work 21 3.1 CTU mode decision level methods 21 3.2 CU mode decision level methods 23 Chapter 4 Proposed Methodology 24 4.1 Basic concept 24 4.2 Statistical analysis 24 4.3 Statistical analysis under conditions 27 4.4 Proposed method 30 Chapter 5 Experimental Results 35 5.1 Test conditions and software reference configurations 35 5.2 Experimental results 36 5.3 Discussion 37 Chapter 6 Conclusions and Future Work 40 References 41

    [1] Coding of Moving Pictures and Associated Audio for Digital Storage Media at up to About 1.5 Mbit/s—Part 2: Video, ISO/IEC 11172-2 (MPEG-1), ISO/IEC JTC 1, 1993.
    [2] Generic Coding of Moving Pictures and Associated Audio Information—Part 2: Video, ITU-T Rec. H.262 and ISO/IEC 13818-2 (MPEG-2 Video), ITU-T and ISO/IEC JTC 1, Nov. 1994.
    [3] Coding of Audio-Visual Objects—Part 2: Visual, ISO/IEC 14496-2 (MPEG-4 Visual version 1), ISO/IEC JTC 1, Apr. 1999 (and subsequent editions).
    [4] Advanced Video Coding for Generic Audio-Visual Services, ITU-T Rec. H.264 and ISO/IEC 14496-10 (AVC), ITU-T and ISO/IEC JTC 1, May 2003 (and subsequent editions).
    [5] K. McCann et al., “High Efficiency Video Coding (HEVC) Test Model 9 Encoder Description”, in JCT-VC of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, JCTVC-K1002, 11th Meeting: China, 2012.
    [6] High efficiency video coding, ITU-T Rec. H.265 and ISO/IEC 23008-2 (HEVC), ITU-T and ISO/IEC JTC 1, Apr. 2013.
    [7] K. Choi and E. Jang, “Fast coding unit decision method based on coding tree pruning for high efficiency video coding”, Opt. Eng. 51, 030502, March, 2012
    [8] J. Kim, S. Jeong, S. Cho, and J. S. Choi, “Adaptive Coding Unit Early Termination Algorithm for HEVC”, IEEE Intel. Conf. Consumer Electronics, pp. 261-262, 2012.
    [9] H. L. Tan et al., “On fast coding tree block and mode decision for high-efficiency video coding (HEVC)”, ICASSP, pp. 825-828, 2012
    [10] R. H. Gweon, J. L. Lee, and J. Lim, “Early Termination of CU Encoding to Reduce HEVC Complexity”, in JCT-VC of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, JCTVC-F045, 6th Meeting: Torino, 2011.
    [11] J. Kim et al., “Early Determination of Mode Decision for HEVC”, Proc. Picture Coding Symposium, 449-452, May, 2012.
    [12] JCT-VC, “Reference software of HEVC Test Model (HM-9.1)”, [Online]. Available: https://hevc.hhi.fraunhofer.de/svn/svn_HEVCSoftware/tags/HM-9.1/
    [13] Frank Bossen, “Common test conditions and software reference configurations”, in JCT-VC of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, JCTVC-K1100, 11th Meeting: China, 2012.
    [14] JCT-VC, “Test sequences”, [Online]. Available: ftp://hevc@ftp.tnt.uni-hannover.de/testsequences/
    [15] Reference algorithm for computing peak signal to noise ratio of a processed video sequence with compensation for constant spatial shifts, constant temporal shift, and constant luminance gain and offset, ITU-T Rec J.340, approved in 2010.

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