Classification of Watermarking Based upon Various Parameters

With the rapid growth of the Internet and multimedia systems in distributed environments, it is easier for digital data owners to transfer multimedia documents across the Internet. Therefore, there is an increase in concern over copyright protection of digital contents [Piva et al (2002); Lu et al (2001); Lu et al (2000); Lee and Jung (2001)]. Traditionally, encryption and control access techniques were employed to protect the ownership of media. These techniques, however, do not protect against unauthorized copying after the media have been successfully transmitted and decrypted. Recently, watermark techniques are utilized to maintain the copyright [Barni et al (2000); Petitcolas (1999); Eskicioglu and Delp (2001)].In this paper, we study the different types of watermarking based upon the various parameters.