H. Lee, K. Kaneko, M. Ishikawa, and H. Miyakoda (Japan)
In this paper, we explain the approach for copyright protection of materials in the autonomous and collaborative
vocabulary learning environment we established. A large
amount of materials will be stored in the vocabulary learning environment. Hence, it is necessary for us to block
registration of learning materials based on those created by
others. Each of materials is a 5-second movie with a subtitle. We protect them by introducing digital watermarks into
the pronunciation data.