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研究生:高志暐
研究生(外文):Zhi-Wei Gao
論文名稱:資料隱藏技術應用於MPEG-4視訊抗誤設計
論文名稱(外文):MPEG-4 Error Resilient Video Coding by Using Data Hiding Techniques
指導教授:賴文能賴文能引用關係
指導教授(外文):Wen-Nung Lie
學位類別:碩士
校院名稱:國立中正大學
系所名稱:電機工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:中文
論文頁數:75
中文關鍵詞:資料隱藏錯誤偵測錯誤補救MPEG-4
外文關鍵詞:Data HidingError DetectionError ConcealmentMPEG-4
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由於資料壓縮與數位調變技術的進步,多媒體無線通訊將是未來通訊科技發展的重點。但在考慮無線通道多媒體傳輸時,我們必須先克服無線通道本身兩個先天上的限制:1)頻寬有限,2)高雜訊背景。
新一代的視訊壓縮標準MPEG-4為了解決上述的問題,在其壓縮的方法上特加入了抗雜訊的機制,而MPEG-4也被第三代行動通訊所採用,因而本篇論文所提的抗雜訊設計就架構在MPEG-4的抗雜訊機制下。
資料隱藏技術一般用於創作者著作權的保護,本篇論文將延伸資料隱藏技術於的抗誤設計。我們應用資料隱藏技術將能夠幫助解碼端提昇接收時品質的資料事先隱藏至壓縮的資料中,經由實驗的結果發現本論文所提的抗誤架構平均可提升視訊接收品質0.3~0.63dB。
壓縮的視訊在遇到錯誤時極易發生錯誤蔓延,而錯誤蔓延在MPEG-4 Data Partition的抗誤模式下的Motion Vector資料部分極不易被察覺。本論文提出資料隱藏技術於錯誤偵測上的應用,以及早發現上述錯誤蔓延的情形。實驗結果發現錯誤偵測正確率為60%。
關鍵字 ─ 資料隱藏,錯誤偵測,錯誤補救,MPEG-4

Recently there are many applications through the wireless environment, e.g., e-commerce, in our life. But there are two major congenital limitation of wireless channel, i.e., narrow bandwidth and high noisy. Thus it is a new research on multimedia data transmission with low bit rate through the wireless channel.
The newest generation of wireless communication, the 3rd wireless communication, has adopted MPEG-4 for video compress. We expect to propose an error resilient algorithm used on the MPEG-4 framework.
The random MB errors and VLC decoding errors usually happen when decoder receive the noisy video bit-streams. This will cause the serious degradation of video quality. In our scheme, data hiding techniques are used to embed useful information to solve above errors and improve the video quality. First, the information, “Super Macro Block Similarity”, is embedded to decrease the effect of the random MB errors for error resilience. Experimental results show that our proposed algorithm increase PSNR 0.3~0.63 dB when random MB errors happen. Besides, another embedded information, “Equal Space Check Point”, can used to detect the error propagation caused by VLC decoding error. From experimental results, the detection rate is more than 60% for VLC decoding error.
Keywords: Data Hiding, Error Detection, Error Concealment, MPEG-4

目錄
第一章 序論…………………………………………………….. 1
1-1視訊壓縮與視訊傳輸簡介…………………………. 1
1-2 文獻回顧…………………………………………… 5
1-3 本論文研究方法…………………………………… 12
第二章 MPEG-4視訊壓縮標準的抗誤機制……………… 14
2-1 MPEG-4視訊壓縮標準簡介……………………….. 16
2-2 MPEG-4的抗誤(Error Resilience)設計………… 18
第三章 架構在MPEG-4標準下的抗誤編碼設計………. 25
3-1 半像素(Half-Pixel)位移向量資料隱藏方法…… 25
3-2 資料隱藏技術應用於運動向量之錯誤補救……… 26
3-3 資料隱藏技術應用於視訊傳輸時的錯誤偵測…… 35
第四章 實驗結果分析與討論………………………………... 42
4-1 MPEG-4視訊傳輸抗誤設計實驗…………………. 42
4-2 MPEG-4視訊傳輸錯誤偵測實驗…………………. 67
第五章 結論與未來研究方向………………………………. 70
5-1 結論……………………………………………….. 70
5-2 未來研究方向…………………………………….. 71
參考文獻………………………………………………………….. 72

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