Research and Application of Digital Watermark for Video Copyright Protection

摘要

Digital watermark technology is a bran-new information security technology. It became a efficient way of the copyright protection of digital production. In this background, this paper researched the keystones of arithmetics based on movement vector, DWT domain and DCT domain. We analysised deeply these embedding projects which had been lodged attached to the arithmetics, to prove why they are not fit for video watermark. And then, this paper gave an innovation -- -- to embed the watermark in the DCT low frequency coefficient of brightness heft in frame I and weaking mosaic through the way of cutting down the pixel blocks, to resolve the Koch arithmetic based on DCT domain. Finally, we proved that it could be applied as an effective instrumentality in video protection through analysis and emulator. Advantages of this method chiefly incarnate practicality and security.