A keyword accessible lecture video player and its evaluation

It is desirable to build up the lecture video library, which enables students to see past lectures anytime and anywhere on their PCs. For this purpose, we have developed the lecture video player/maker system[1]. In the system, we have considered the usability for students and the operationality for teachers. The former includes the keyword access function, which enables to jump to the scenes related to keywords. And the later includes automatic index generation after speech recognition of the whole lecture stream. In this paper, we discuss the structure and the functions of an ideal lecture video player, and the importance of the index corresponding to the scenes, when the related keywords are spoken. After that, we will show the experimental results of keyword extraction from three lecture streams. The evaluation of the lecture videos and the developed player by students is also given.