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研究生: 王俊彥
Chun-Yen Wang
論文名稱: 立體視訊於無線網路環境下的多點排程
Multicast Scheduling for Stereoscopic Video in Wireless Networks
指導教授: 花凱龍
Kai-lung Hua
口試委員: 鄭文皇
Wen-huang Cheng
王鈺強
Yu-chiang Wang
金台齡
Tai-lin Chin
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: 英文
論文頁數: 34
中文關鍵詞: 非對稱立體視訊影片多點傳播速率排程演算法
外文關鍵詞: asymmetric stereoscopic video multicast, rate scheduling algorithm
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  • 隨著3D視訊影像的拍攝技術與後製技巧越趨成熟,以及現今硬體方面如電腦甚至於手機等行動裝置可以支援3D視訊影像的播放,我們可以預期3D視訊影像將會是接下來多媒體市場的主流。然而,要如何將擁有龐大的多媒體資訊量的3D視訊影像傳輸至觀看者家中或行動裝置依舊是個難題。由binocular suppression theory,我們可以得知,立體影像中擁有較高品質的view將會主宰整體立體影像的品質。根據此概念我們假設當透過無線網路廣播一立體視訊影像時,如果我們集中傳輸立體影像中其中一view時,可以有效利用可用的限制頻寬並且使整體立體影像品質達到更高的表現效果。在此篇論文中,我們根據binocular suppression theory廣播一非對稱性品質的立體視訊影像給接收者,並且利用scalable video coding其彈性的encoding方式讓3D立體視訊影像可以更具適應性的透過無線網路廣播。此外,我們提出一rate scheduling演算法使得立體視訊影像中每個scalable coded block能夠以其最適合的傳輸速率透過AP廣播給接收者,並且同時考慮了blocks之間的相依關聯性以確保無法成功decode的blocks之比例能夠被降到最低。


    With the shooting technology and post-processing method of three-dimensional (3D) video both are more mature, and the hardware device as computer even the mobile can support to play 3D video nowadays, it can be expected 3D video will be the mainstream in digital multimedia market. However, it is still a challenging problem to transmit 3D video to home and mobile because of its huge amount of multimedia data. In binocular suppression theory, the view with higher quality in 3D stereo video will determine the overall perception quality. According to this concept, we assume that while stereo video sequence is broadcasting through wireless environment, if we focus on one of stereo views transmission then we can utilize available limit bandwidth efficiently and the overall perception quality will be achieved to higher performance. In this paper, we broadcast an asymmetric quality stereoscopic video to receivers according to suppression theory, and exploit flexible encoding character of scalable video coding, let 3D stereoscopic video can be more adaptive broadcasted through wireless multicast. Besides, we propose a rate scheduling algorithm such that each scalable coded block in stereo video stream can be broadcasted by AP at a suitable transmission rate, and we consider about dependency relation of between-blocks simultaneously to ensure the ratio of useless undecodable blocks will be minimized.

    中文摘要 -i Abstract - ii Acknowledgment - iii Table of Contents - iv List of Figures - v 1 Introduction - 1 2 Depedency-Aware Rate Scheduling for Stereoscopic Video Multicast - 6 2.1 Problem Formulation - 6 2.2 Rate Scheduling By Dynamic Programming Algorithm - 12 2.3 Post-Processing Rate Adjustment Algorithm - 14 3 Performance Evaluation - 25 3.1 Objective Stereoscopic Video Measure - 26 3.2 Impact of Expression of Block Importance and Weighting Assignment - 27 3.3 Impact of User Distribution - 28 4 Conclusion - 32 References - 33

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