Development of Distance Learning and Video Delivering System via ATM Network

本研究的目的是建立一个具有真实的时间和多媒体的交互式远程教育学习/教育系统，找出该系统存在的问题，并开发一个具有多点视频传输的网络系统。例如，通过ATM网络传输的视频中出现了MPEG 2和DV格式。然而，要建立一个良好的远程教育环境，还需要解决各种问题。因此，本研究主要从以下四个方面进行研究：1.探讨了与学习者相关的网络设备，如交互式远程教育系统的建立，支持视频传输系统的响应分析器和Web服务器的功能，教学助理的角色，2.介绍了在互动距离下的讨论等实用的授课方式3.对世界各地卫星电视节目的教育应用情况进行了调查，并接收了卫星电视节目，进行了校园内的视频传输试验。4.为了建立多点视频传输系统，在校园内的一次研讨会上进行了多点视频传输试验。此外，这次专题讨论会通过三颗卫星和另一颗区域卫星提供真实的时间，然后确定了社会、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.