Development of Distance Learning and Video Delivering System via ATM Network

本研究的目的是建立一个实时多媒体互动远程教育的学习/教育系统，找出该系统存在的问题，并开发一个多点视频传输的网络系统。例如，通过ATM网络进行视频传输时出现了MPEG2和DV格式。然而，要营造良好的远程教育环境，还需要解决好各种问题。因此，本研究从以下四个方面进行了研究；1.研究与学习者有关的网络设备，如互动远程教育系统的建立，支持视频传输系统的响应分析器和网络服务器的功能，助教的角色，摄像工作者在学习者对讲师的反馈中的作用。2.介绍互动远程教育下的讨论等实用讲座形式。3.对世界上卫星电视节目的教育应用情况进行调查，并接收这些节目，然后尝试在校园内传输这些节目。4.为了建立一个多点站点的视频传输系统，在校园内通过互联网从多个点站点进行了一次研讨会。此外，这次研讨会通过三颗卫星和另一颗区域卫星实时播送，随后发现了社会、技术和通信问题。

The purposes of this study are to establish a learning/educational system of interactive distance education with real time and multimedia, to identify problems of this system, and to develop a network system with video delivering to multiple point sites.research periods. For example, MPEG2 and DV format emerged in video delivering via ATM network. However, it is necessary to solve various problems in order to establish an excellent environment of distance education. Therefore, this study investigated four aspects as follows;1.Investigating the relation network equipment to learners such as establishment of system for interactive distance education, the functions of response analyzer and web server for supporting video delivering system, the roles of teaching assistants, the roles of camera workers in learners' feedback for a lecturer.2.Introducing practical lectures styles such as discussions under interactive distance education.3.Conducting a survey about educational applications of satellite TV programs in the world, and receiving those programs, and then made a trial to deliver those programs in the campus.4.In order to establish a video delivering system to multiple point sites, a symposium in the campus was delivering via the Internet from multiple point sites experimentally. Additionally, this symposium was delivering with real time via three satellites and another regional satellite, and then was identified social, technical and communicational problems.