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

网络远程授课的教学效果不如普通的课堂教学，本研究通过实践探讨了如何减少网络远程授课的弊端。针对理工科专业基础课课堂教学中常见的板书式教学进行了重点研究。教师在黑板上呈现手写的教材，并进行讲解。学生们在笔记本上复制黑板，并跟踪老师的想法。学生对照自己已有的想法，编辑并得到新的概念，学生不能从黑板上的字符从图片，通过一个普通的电视会议系统，分辨率低。因此，基于黑板的讲座无法使用旧的电视会议系统实现。在这项研究中，我们已经表明，远程基于黑板的讲座可以成功地进行，在那里，学生可以阅读 关于我们 黑板的字符很容易从高分辨率的图片通过DVTS（数字视频传输系统）在宽带网络。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。通过将教师书写的高分辨率黑板图片传输给远程教室的学生，并将学生的图片传输给教师，实现了远程授课。开发了为远程学生显示过去黑板图片的授课支持工具“远程黑板演示系统”。在实际的远程教学中，我们也证实了该工具的有效性。我们分析了在普通课堂上的黑板讲座，教师和学生之间的信息交流的观点。在分析的基础上，我们提出了一个基于黑板的讲座模型。总结了我们的实践，展示了利用高分辨率视频会议系统进行远程授课的现阶段成果。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