強健型容錯之H.264/AVC視訊編碼研究

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姓名

呂存皓(Chung-Hao Lu) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

強健型容錯之H.264/AVC視訊編碼研究
(Robust Error-resilient H.264/AVC video coding)

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摘要(中)

為了將大量的視訊資料經由有限的頻寬傳輸，我們必須採用具高壓縮率之視訊編碼如H.264/AVC進行編碼。為了達到較高的壓縮效能，H.264/AVC採用較以往更複雜的移動補償(motion compensation)達到更精準的預測畫面，但移動補償會造成潛在性的錯誤蔓延效應，在傳輸通道擾發生錯誤時，如無線網路傳輸受到干擾，有可能會因錯誤蔓延的效應，導致解碼端無法完整重建視訊影像，嚴重影響視訊影像的畫面品質。在本篇論文當中，提出了應用於H.264/AVC上的容錯性視訊編碼。始用了畫面跳張預測技術以減少錯誤蔓延產生的機會，和聯合消息源與通道錯誤之新型碼率失真函數選擇抗錯能力較好的模式及移動向量抑制錯誤蔓延的效果，達到降低錯誤蔓延造成的影響，同時維持在失真環境下影像視訊品質的效果。實驗結果顯示，相較於其他相關的演算法，我們所提出的演算法都有較好的效能表現。

摘要(英)

Due to channel bandwidth limitation of wireless networks, a video bit stream has to be highly compressed using efficient coding techniques, such as H.264/AVC. To improve coding efficiency, the H.264/AVC encoder features many advanced techniques. These advanced coding techniques cause severe error propagation problem in error-prone wireless transmission channels due to channel distortions. The error propagation severely deteriorates decoded visual quality, and a robust error resilient video coding is required in error-prone transmission channel. In this thesis, we propose an error resilient video coding in H.264/AVC, using frame skipping prediction technology and joint source channel rate-distortion function. Frame skipping prediction can reduce probability of error propagation and joint source channel rate-distortion function can restrain the effect of error propagation. Finally we combine both of them to further reduce error propagation and maintain visual quality. The experimental results show that our proposed algorithm achieves better coding performance than other distinct algorithm.

關鍵字(中)

★ 容錯性視訊編碼
★ H.264/AVC影像編碼
★ 聯合消息源與通道之碼率失真函數
★ 畫面跳張預測

關鍵字(英)

★ error resilient video coding and H.264/AVC video
★ joint source channel rate-distortion function
★ frame skipping prediction

論文目次

章節目錄
第一章緒論
1.1 視訊壓縮標準簡介 1
1.2 研究動機與目的 2
1.3 論文架構 3
第二章容錯性視訊編碼之相關文獻探討
2.1 H.264/AVC簡介 4
2.1.1 畫面間模式預測 6
2.1.2 畫面內模式預測 9
2.2 容錯性視訊編碼之相關文獻簡介 11
2.3 畫面內重新編碼技術為基礎之相關文獻簡介 12
第三章強健型克服錯誤之畫面間預測技術之研究
3.1 強健型克服錯誤之畫面間預測技術介紹 19
3.2 無失真環境下強健型克服錯誤之畫面間預測技 24
術之綜合效能分析
3.3 失真環境下強健型克服錯誤之畫面間預測技術 30
之綜合效能分析
3.4 結論 31
第四章結合通道錯誤之影像編碼技術探討
4.1 結合通道錯誤之影像編碼技術 32
4.1.1 結合通道錯誤之模式決策 32
4.1.2 結合通道錯誤之移動估測 35
4.1.3 綜合效能分析 37
4.2 結合通道錯誤之強健型畫面間預測技術之探討 40
4.2.1 結合通道錯誤之強健型畫面間預測技術介紹 40
4.2.2 結合通道錯誤之強健型畫面間預測技術之效 43
能分析
4.3 結論 55
第五章結論與未來展望 56
參考文獻 57

參考文獻

參考文獻
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指導教授

林銀議(Yinyi Lin)

審核日期

2012-7-26

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