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題 名 | 非同步視訊教學技術研究=A Study on Asynchronous Video-Teaching Technology and Network Performance Evaluation |
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作 者 | 唐文華; | 書刊名 | 新竹師院學報 |
卷 期 | 13 2000.02[民89.02] |
頁 次 | 頁225-243 |
分類號 | 521.58 |
關鍵詞 | 遠距教學; 課程隨選; 非同步視訊教學; 視訊點播系統; 網路頻寬; Distance learning; Course on demand; Asynchronous video-teaching system; Video-on-demand system; Network bandwidth; |
語 文 | 中文(Chinese) |
中文摘要 | 由於網路和通訊技術的快速發展與應用,使學校的教學方式更加多元化,而透過 網路的學習活動也逐漸成為人類獲得知識的重要管道。現代化的遠距教學系統結合了電腦、 網路和多媒體等技術,提供學習者一個超越時空限制的互動式多媒體教學環境。近年來歐美 先進國家都積極地研發遠距教學技術,希望能夠將它應用到各種領域的教育訓練上,以改善 偏遠地區因人力或設備不足而造成在學習上的缺失。目前國內所推動的遠距教學計畫主要分 成即時群播、課程隨選和虛擬教室三部份,其中即時群播和課程隨選分別屬於同步與非同步 視訊教學系統,虛擬教室則屬於網路教學管理系統,而本文將著重於非同步視訊教學技術的 研究。所謂的非同步視訊教學,就是利用視訊點播的技術,將所要學習的教學節目,透過視 訊伺服器和網路下載播出。雖然這類系統無法滿足即時互動的要求,卻可以提供全天候的遠 距教學服務,而學生也可以依照本身的學習速度來操控播放過程。目前市面上的視訊點播系 統大多採用主從式架構,使用者只要透過網路和外掛播放軟體,就可以將遠端的視訊節目傳 送到個人的電腦畫面,有些系統甚至還提供現場轉播和定時廣播的功能。我們將探討非同步 視訊教學的技術,內容包括視訊點播系統架構、視訊教學節目製作方法、視訊檔案壓縮技術、 以及網路頻寬和視訊伺服器對非同步視訊教學效果所造成的影響。 |
英文摘要 | The development and application of network and communication technology has made school teaching manifold, and learning activity through network has become an important medium for human beings to acquire knowledge. Modern distance learning combines computer, communication and multimedia technology to provide interactive environment between students and far-away teachers. In recent years, advanced countries in Europe and America devoted great efforts to distance-learning research and aimed at applying the technology to different areas of education and training to improve the deficiency of manpower and instrument in distant region. Currently, the distance-learning projects proceeded in our country are real-time group broadcasting, course on demand, and virtual classroom. Among them, real-time group broadcasting and course on demand belong to synchronous and asynchronous video-teaching systems respectively, and virtual classroom is a member of network-learning management systems. We will focus on the study of a synchronous video-teaching technology. Asynchronous video-teaching systems utilize video-on-demand (VOD) technology to download video-teaching programs from video server through network. Although such systems can not satisfy the requirement of real-time interactivity, they provide all-time distance-learning service and students can proceed the learning and manipulation according to their learning speeds. Most VOD systems adopt client-server structure, so video programs can be transmitted from far side to the screen of personal Computers by using plug-in software. Some systems even provide real-time broadcasting and schedule functions. In this paper, we will study asynchronous video-teaching technology, including the structure of VOD systems, the method to develop video-teaching program, video file compression technique, and the effect of network bandwidth on the performance of video-teaching systems. |
本系統中英文摘要資訊取自各篇刊載內容。