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| 研究生： |
江莉瑋 Li-Wei Chiang |
|---|---|
| 論文名稱： |
應用在多視角視訊編碼中關鍵畫面的動態預測結構 Adaptive Inter-view Prediction Structure of Key Pictures for Multi-view Video Coding |
| 指導教授： |
鍾國亮
Kuo-Liang Chung |
| 口試委員: |
顏嗣鈞
Hsu-chun Yen 陳宏銘 Homer H. Chen 范國清 Kuo-Chin Fan 楊偉楨 Wei-Jen Yang |
| 學位類別： |
碩士 Master |
| 系所名稱： |
電資學院 - 資訊工程系 Department of Computer Science and Information Engineering |
| 論文出版年： | 2012 |
| 畢業學年度： | 100 |
| 語文別： | 中文 |
| 論文頁數： | 43 |
| 中文關鍵詞： | 錯誤傳遞 、畫面群(GOP) 、關鍵畫面 、多視角視訊壓縮 、3DTV |
| 外文關鍵詞： | Error propagation, group of pictures, key pictures, multi-view video coding, three-dimensional television (3DTV) |
| 相關次數： | 點閱：216 下載：2 |
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在多視角視訊壓縮技術(MVC)中，每個畫面群(GOP)中關鍵畫面的編碼品質將會影響到整個畫面群壓縮的效能，因此關鍵畫面的編碼是一個重要的研究議題。當考量到不同攝影機間的品質差異時，本論文提出了一個關鍵畫面的動態預測結構來改善因某些損壞的攝影機所造成的錯誤傳遞問題。在編碼多視角視訊前，我們會檢查每個視角第一個GOP中的關鍵畫面，並判斷其是否為損壞攝影機的視角，然後重新排列視角間的編碼順序，以提高編碼後的影像品質。重新排列後的預測結構將用於所有的GOP編碼並可獲得可觀的編碼增益。基於四個多視角視訊的測試影片，且假設相機的損壞不超過一半的條件下，實驗結果證實新的動態預測架構在壓縮比上的表現上優於MVC的固定編碼結構。
In the multi-view video coding (MVC), the encoding of key picture in each group of picture (GOP) is crucial since the compression performance of each GOP depends on the quality of the encoded key picture. Taking the quality conditions of cameras into account, this thesis presented an adaptive inter-view prediction structure of key pictures to alleviate the error propagation problem caused by some poor cameras. Before encoding multi-view sequences, we examine the key picture in the first GOP of each view to identify these poor cameras, and then adjust the inter-view prediction structure for key pictures, i.e. re-arrange the order intra-coded and inter-coded pictures, to enhance the coded image quality. The rearranged inter-view prediction structure is used to encode key pictures of all GOPs to achieve a substantial coding gain. Based on four test multi-view sequences with the assumption that no more than half of cameras are malfunctioned, experimental results demonstrate the bit rate superiority of the proposed adaptive prediction structure when compared to the traditional MVC with fixed structure of the key pictures.
[1] P. Benzie, J. Watson, P. Surman, I. Rakkolainen, K. Hopf, H. Urey, V. Sainov and C. von Kopylow, “A survey of 3DTV displays: techniques and technologies,” IEEE Trans. Circuits and Systems for Video Technology, vol. 17, pp.1647-1658, 2007.
[2] A. Smolic, K.Mueller, P.Merkle, T. Rein, M. Kautzner, P. Eisert and T. Wiegand, “3D video and free viewpoint video – technologies, applications and MPGE standards,” in Proc. Int. Conf. Image Processing, vol. 5, pp.3287-3290, 2004.
[3] A. Kubota, A. Smolic, M. Magnor, M. Tanimoto, T. Chen and C. Zhang, “Multiview Imaging and 3DTV,” IEEE Trans. Signal Processing Magazine, vol. 24, pp.10-21, 2007.
[4] Joint Video Team, Draft ITU-T Recommendation and Final Draft international Standard of Joint Video Specification, ITU-T Recommendation H.264 and ISO/IEC 14496-10 AVC, 2003.
[5] P. Merkle, A. Smolic, K. Muller and T. Wiegand, ”Efficient prediction structures for multiview video coding,” IEEE Trans. Circuits and Systems for Video Technology, vol. 17, pp.1461-1473, 2007.
[6] U. Fecker and A. Kaup, “Statistical analysis of multi-reference block matching for dynamic light field coding,” Document MPEG2005/M11546, 2005.
[7] C. Fehn, “Depth-image-based rendering (DIBR), compression and transmission for a new approach on 3DTV,” in Proc. SPIE Conf. Stereoscopic Displays and Virtual Reality Systems, vol. 5291, pp. 93-104, 2004.
[8] Y. Zhao, C. Zhu, Z. Chen and L. Yu, "Depth No-Synthesis-Error Model for View Synthesis in 3-D Video," IEEE Trans. Image Processing, vol.20, pp.2221-2228, 2011.
[9] ISO/IEC JTC1/SC29/WG11, “Moving Multiview Camera Test Sequences for MPEG-FTV,” Doc. M16922, Oct. 2009.
[10] ISO/IEC JTC1/SC29/WG11, “Multiview Video Test Sequence and Camera Parameters,” Doc. M15419, Apr. 2008.
[11] ISO/IEC JTC1/SC29/WG11, “HHI Test Material for 3D Video,” Doc. M15413, Apr. 2008.
