On the Requirements for the Advanced Remote Lectures over High Speed Network

人们越来越认识到，网络远程授课的教育效果不如普通授课，学生和老师都在教室里。本研究通过实践探索了如何减少远程授课的缺陷。重点介绍了理工科专业基础课中常见的板式授课。一位老师在黑板上展示手写的教材并讲解。学生们拿出一本笔记本上的黑板，描绘老师的思想。学生与自己已有的想法进行比较，编辑并获得新的概念，学生无法通过通常的低分辨率电视会议系统从图片中阅读黑板上的字符。在这项研究中，我们证明了基于黑板的远程讲座可以成功地进行，在那里，学生可以阅读…通过DVTS(数字视频传输系统)在宽带网络上轻松地从高分辨率图片中获得更多的黑板字符。我们在佐贺大学和德岛大学之间，以及佐贺大学和大分大学之间进行了远程讲座。通过将教师写的高分辨率黑板图片传输给远程教室中的学生，并将学生的图片传输给教师，实现了远程授课，开发了一个远程黑板演示系统，为远程学生展示过去的黑板图片。并在实际远程教学中验证了该工具的有效性。从师生信息交流的角度对普通课堂黑板授课进行了分析。在此基础上，我们提出了基于黑板的课堂教学模式。在总结实践的基础上，给出了利用高分辨率视频会议系统实现远程授课的现阶段实现。较少

There is a growing recognition that remote lectures over network are not so effective for education as ordinary lectures where both students and a teacher are in a classroom.In this research we investigate, with doing practices, the ways to reduce the defects of remote lectures. We focus blackboard based lectures which are common in the lessons of basic professional course of science and engineering. A teacher presents teaching material writing by hand on the blackboard with explanation. Students take a copy of the blackboard on their notebook and trace the thought of the teacher. The students compare with own existing idea, editing and get new concept.Students could not read characters on the blackboard from the pictures though a usual TV conferencing system with low resolution. So blackboard based lectures are not realized using old, TV conferencing system.In this research we have shown that remote blackboard based lectures can be performed successfully, where, students can read the … More characters of the blackboard easily from high-resolution pictures through DVTS(Digital Video Transport System) over broadband network. We performed remote lectures between Saga University and Tokushima University, and between Saga University and Oita University. We realized the lectures as remote ones with transmitting the high resolution pictures of the blackboard which a teacher writes to the students in a remote classroom and with transmitting the pictures of students to the teachers.We developed a lecture support,tool "Remote Blackboard Presenter System" which shows the past blackboard pictures for remote students. We also confirmed the effectiveness of the tool in actual remote lectures.We analyzed the blackboard lecture in ordinary classroom under the viewpoint of information exchange between a teacher and students. Based on the analysis we proposed a model of a blackboard based lecture. Summarizing our practices, we also show the present stage attainment of the remote lecture with use of high resolution Video conferencing system. Less