Study on communication support to smooth international education exchanges

在语言、科学技术、文化等各个领域的国际教育交流中，需要使用视听信号进行顺畅通信的机制。本研究构建了检索视听信号所包含的信息的函数（在不同语言的情况下为字符信息）并呈现注释信息为了构建一个原型系统，我们实现了用于检测视频图像中的对象的图像检测功能和用于识别图像中的字符信息的识别功能的基本技术。我们还开发了用于呈现注释、翻译、图像和3D动画等补充说明的呈现功能以及用于跟踪与相关信息空间对应的位置的布局功能。然后，我们进行了一个实验，使用卫星通信系统，以检查系统的工作。通过对实验进行主观评价，确认了开发系统的可用性，并对有效利用该系统的基础设施和顺利进行教育交流的网络结构进行了调查。我们讨论了教育交流方法和国际交流的现状，应该使用卫星通信提供稳定的电信。此外，我们研究了声学环境，在提高电信的可操作性和沉浸感方面发挥着重要作用。我们测量了声学特性，并进行了计算机模拟的语音性能方面的音频回声问题与远程会议。

The mechanism for smooth telecommunications using audiovisual signals is needed for international educational exchanges at various fields such as language, scientific technology, culture, etc. This research constructs functions to retrieve the information involved in the audiovisual signals (character information in case of different language) and to present annotation information (explanation, interpretation, and images) to learners.To construct a prototype system, we implemented the basic technology of image detection function for detecting objects in video images and recognition function for recognizing character information in the images. We also developed presentation function for presenting complementary explanation such as annotations, translations, images, and 3D animations and layout function for tracking the position spatially corresponding to the relevant information. Then we conducted an experiment using a satellite communication system in order to check the working of the system. We confirmed availability of the developed system by making the subjective evaluation of the experiment.We also investigated the infrastructure for effectively using the system and the network configuration for smoothly making educational exchanges. We discussed the current situation on the educational exchange method and international exchange, supposed to use the satellite communications that provide stable telecommunications.Besides, we studied acoustic environment that plays an important role in improving operability and immersion in telecommunications. We measured the acoustic characteristics and make computer simulation on voice performance with respect to audio echo problems with remote meetings.