H.264/AVC中一種B畫面的模式決策及移動估測之研究; An Efficient Mode Decision and Motion Estimation for B Slice in H.264/AVC

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Title:	H.264/AVC中一種B畫面的模式決策及移動估測之研究;An Efficient Mode Decision and Motion Estimation for B Slice in H.264/AVC
Authors:	謝其璋;Chi-Chung Hsieh
Contributors:	通訊工程研究所
Keywords:	區塊模式決策;H.264/AVC;移動估測;零區塊;編碼區塊樣式;B畫面;帶狀搜尋;H.264/AVC;B slice;zonal search;coding block pattern;zero-block;motion estimation;block mode decision
Date:	2011-08-22
Issue Date:	2012-01-05 14:52:58 (UTC+8)
Abstract:	相較於過往的視訊壓縮標準，H.264/AVC 能提供更好得視訊品質與編碼效能，最主要的原因在於其採用了許多先進的技術，像可變區塊大小的移動估測，但在此同時，計算複雜度亦會無法提升至無法令人接受的地步，過往已經有許多高效率的演算法是針對P 畫面編碼以降低其計算複雜度，卻沒有文獻在探討B 畫面與P 畫面的差異，基於此原因，本論文中我們將針對B 畫面編碼以提出高效率的模式決策機制來加速B 畫面的編碼，除此之外，我們亦提出了一種高效率移動估測演算法來再次的節省編碼時間，實驗結果顯示，比起傳統的B 畫面編碼，我們所提出的演算法不但可以在節省計算複雜度的同時亦能增加編碼的效能。 H.264/AVC achieves significantly better coding performance, compared to revious video coding standard. This is because that many advanced techniques are employed in H.264/AVC, such as variable block sizes motion estimation. Therefore, the computation complexity is unbearable. Many efficient algorithms have been proposed for P frame coding to reduce the computation complexity. In this thesis, we focus on B frame coding and propose efficient mode decision scheme to speed up the B frame coding. In addition, an efficient motion estimation algorithm, has been proposed to further reduce the coding time. The experimental results show that our proposed algorithm can reduce the computation complexity while improving the coding performance, when compared to original B frame coding scheme.
Appears in Collections:	[Graduate Institute of Communication Engineering] Electronic Thesis & Dissertation

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