Multimedia Video Watermarking Algorithm Using SVD and Secret Sharing

For the sake of achieving the copyright protection and piracy tracking of digital product, keeping the appropriate watermark embedding degree and amount of information, and having good system robustness, a new algorithm for video watermarking based on SVD and secret sharing is proposed and designed in this subject. Singular value decomposition, as an important matrix decomposition method in linear algebra, is the generalization of the normal matrix unitary diagonalization in matrix analysis. An image could be converted into a data matrix. Secret sharing scheme is a technique that distributing the secret reasonably among multiple participant, which can be used to prevent important information from being destroyed and tampered. Combining with SVD, this scheme is applied to the preprocessing of video watermark information, and the watermarking system obtained from this system has stronger confidentiality, security and stability. The results of several simulation experiments show that the algorithm designed in this subject has good robustness to some common attacks, satisfy the invisibility of human visual system at the same time and control the embedding and extracting process of digital watermark information. Embedded watermark information can still be completely detected and extracted after the pretreatment process and video compression by using the H.264 standard.