COPYRIGHT PROTECTION FOR VOCABULARY LEARNING MATERIALS

摘要

In this paper, we explain the approach for copyright protectionrnof materials in the autonomous and collaborativernvocabulary learning environment we established. A largernamount of materials will be stored in the vocabulary learningrnenvironment. Hence, it is necessary for us to blockrnregistration of learning materials based on those created byrnothers. Each of materials is a 5-second movie with a subtitle.rnWe protect them by introducing digital watermarks intornthe pronunciation data.