Data protection of multimedia contents using scalable digital watermarking

Presently, the development of multimedia contents has been activated due to the utilization of network-based distance education or seminar. Because of this, copyright problems for developed multimedia contents have been raised, and devices and user´s demands become various. Therefore, it is suggested that multimedia contents should be appropriately fit to each device and user´s demands and illegal manipulation of non-owners should be prevented for developed multimedia contents and the ownership should be authenticated for transformed information. In this paper, scalable digital watermarking of multimedia contents is suggested in the wavelet based compression domain with the emphasis on the robust watermark algorithm. Also, we implement multimedia data presentation system for distance education and seminars on the network and apply scalable digital watermarking techniques.