A SENSOR-FUSION METHOD FOR DETECTING A SPEAKING STUDENT

In this paper, we propose a method for detecting the lo-cation of a speaker that is a target of automatic video film-ing in distance learning and lecture archive. It is required that a speaking student is filmed with large size in a lecture video. For this purpose, it is necessary to detect the loca-tion of a seat sat by a speaker. An acoustic sensor such as a microphone array is used widely in order to detect the lo-cation of a sound source. However, it is difficult to detect the location using only microphone array because of sound noise in a large space such as a lecture room. In this paper, we propose a method for detecting more precise location of a speaker in the lecture room using not only the micro-phone array but also visual sensors. The result shows that the precision ratio of detecting the location of a speaker was improved about 20 % by our sensor-fusion method. 1