臺灣博碩士論文加值系統

由於行動上網的普及與便利性，加上行動上網即將由3G進展到4G，上網頻寬更大且連線速度更快，因此影音播放應用軟體的開發日益蓬勃發展。但對這類軟體開發者而言，必須開發不同版本來解決跨平臺所衍生相容性的問題，導致開發與維護成本大幅提高。另一方面，為了傳輸視訊畫面及聲音到用戶端，通常使用即時串流協定(Real Time Streaming Protocol; RTSP)。RTSP的缺點是會遭遇防火牆阻擋的問題，使得影音資料無法傳輸至用戶端來瀏覽。本論文透過HTML5新增的video標籤功能，結合MPEG-DASH傳輸技術，建置一個HTML5的跨平臺視訊串流播放環境。透過網頁端的HTTP協定，避開傳統傳輸串流遭遇的防火牆問題。在伺服器端，討論不同mp4分段方式與傳輸之影響。為了建構出適合的環境，我們採用段落式mp4當成分段標準，配合MediaSource API，使瀏覽器端可以達成漸進式下載，讓使用者有較佳的觀看體驗。我們實作了整個架構，並以簡單的評測方式確認每個段落是否載入，並且計算網路回應時間。在未來發展上，可加入網路自適性的調整，並擴展到不同平臺上。

Due to mobile network is more popular and more convenient and the network speed is faster from 3G to 4G. Therefore, multimedia applications is flourishing. For developers, the cost of development will increased because there is a cross-platform problem. In generally situation, we send video and audio data to client by using Real Time Streaming Protocol(RTSP), but it has a firewall problem . In this research, we hope to use HTML5 video tag and MPEG-DASH transmission technique to build a cross-platform streaming environment of HTML5. By using HTTP protocol to avoid firewall problems. We implemented different presentations of video tag and discussed the results. To achieve our goal, we use segmented mp4 to be the standard and use MediaSource API to construct our client browser. So that the browser can reach progressive download. After we implemented our method, we measured the loading time and response time. In future, we can add adaptive method and extend to different platforms.

摘要 i
ABSTRACT ii
目錄 iii
圖目錄 v
表目錄 vi
第一章、前言 1
1.1研究背景與動機 1
1.2文獻瀏覽 2
1.3研究目標 3
1.4 論文架構 3
第二章、HAS技術特點 5
2.1 HTTP Live Streaming (HLS) 5
2.2 Dynamic Adaptive Streaming over HTTP (DASH) 5
2.3 Microsoft Smooth Streaming 5
2.4 Adobe Dynamic Streaming 6
第三章、所提方法 8
3.1 MPEG-4 PART 14 9
3.2 視訊分段方式 11
第四章、實驗結果 15
4.1 實驗環境 15
4.2 實驗結果與討論 15
4.2.1 指令分析 15
4.2.2 效能分析 18
第五章、結論與未來展望 22
5.1結論 22
5.2未來展望 22
參考文獻 23

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