Approaches for copyright protection of compressed and uncompressed video data using enhanced watermarking

Abstract

In the current era of communication medium the usage of digital video has increased newlinetremendously In response to this increase the importance of using property rights protection system for content protection has become a vital element of communication In this research watermarking methods as a mechanism for content protection of video are proposed The copyright information is created as a nested watermark using wavelet transformation and visual cryptography The study proposes techniques that embed the copyright data before compression newlineraw video data or after compression The MPEG video standard is used for compressed videos newlineBefore embedding in order to increase the robustness of the algorithms a frame selection and region selection algorithm is used This algorithm identifies optimal frames and regions within these frames newlinethat produce minimal distortion in the watermarked video Two techniques namely static and dynamic block selection are proposed to watermark videos newlinein uncompressed form For watermarking compressed videos three techniques are proposed The newlinetechniques are based on Discrete Cosine Transformation Discrete Wavelet Transformation and newlineFeature based algorithm The algorithms in order to increase robustness and security use the SVD and dynamic block selection algorithms newline