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研究生： 白東玄
Tung-Hsuan Pai
論文名稱： 有效使用多重可局部反向解碼之位元串流(PBDBS)以提升視訊編碼H.263+在傳輸時的強健性
Efficient Algorithm for Robust H.263+ Transmission Using Multiple-PBDBS Approach
指導教授： 鍾國亮
Kuo-Liang Chung
口試委員: 古鴻炎
Hung-yan Gu
黃寶儀
Polly Huang
廖弘源
Hong-Yuan Liao
貝蘇章
Soo-Chang Pei
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： 2005
畢業學年度： 93
語文別： 英文
論文頁數： 24
中文關鍵詞： 傳輸時的強健性 、錯誤波及 、可局部反向解碼之位元串流
外文關鍵詞： Error propagation, Robust video Transmission, Partial Backward Decodable Bit Stream
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    • 本論文探討，視訊編碼H.263+在傳輸上，如何利用多重可局部反向解碼之位元串流(Partial Backward Decodable Bit Stream)以減少錯誤波及的情況。首先以前人所提的可局部反向解碼之位元串流(PBDBS)想法為基本概念，我們提出了更有效的改良方式－使用多重可局部反向解碼之位元串流(MPBDBS)可使錯誤的波及長度降到最短。在本文中，我們使用數學式的證明，得知最短的錯誤波及長度就是一個解碼基本單位(Macroblock)。要實現此種方法，需要記錄一點額外的資訊，即是在錯誤波及長度與紀錄額外資訊取得折衷點。最後，實驗結果說明此方法所得的影像品質確實優於先前所提出的方法。

    Recently, Gao and Tu presented an efficient algorithm for robust H.263+ video transmission by using partial backward decodable bit stream (PBDBS) approach. In this paper, we first present a multiple-PBDBS (MPBDBS) approach to improve the previous PBDBS approach. Next a mathematical theory is provided to minimize the error propagation length in each group of blocks (GOB). Further, a novel MPBDBS-based algorithm is presented for robust video transmission. Experimental results demonstrate that our proposed MPBDBS-based algorithm has a better image quality when compared to the previous PBDBS-based algorithm, but has little bit rate degradation.

    1.INTRODUCTION(1) 2.PAST WORK:THE PBDBS APPROACH(3) 3.THE PROPOSED MPBDBS-BASED ALGORITHM(7) 4.EXPERIMENTAL RESULTS(16) 5.CONCLUSION(22)

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