Research Of Video Digital Copyright Protection Technology

At present,the rapid development of information technology,storage,replication and dissemination of digital multimedia products becomes easy and fast.Without restrictions on the use of digital media products and distribute make information security issues of digital media in the communication process triggered by the problem of piracy,copyright disputes have become increasingly prominent issue in society.In response to the video digital copyright protection,use video watermarking technology for video products copyright protection,by extracting video watermark information to the video product of effective copyright authentication,to ensure video products spread security.It is investigated in this thesis about the research present situation and existing problems of mainstream video watermarking technology,carried out research and analysis for the current mainstream video watermarking algorithm,based on the DWT and DCT domain video watermarking algorithm theory,proposed a combining DWT and DCT blind video watermarking scheme.The program draws on the human visual system model,adaptive quantization embedding watermark information,to ensure the watermark imperceptible good premise greatly improve the robustness of the watermark.Concrete work and innovation of this paper is as follows:(1)Analyzed the model of video copyright protection based on digital watermarking.Focus on the analysis of common video watermarking algorithm and the typical single frame image transform domain watermark embedding algorithm.Simulation and analysis of the watermarking algorithm based on scrambling and chaos based watermarking algorithm,and sum up the rule of the choice of the scope of the watermark and the limitations of the algorithm.(2)Designed a DWT-DCT blind video watermarking algorithm.Algorithm effectively remove the watermark itself relevant,encrypted watermark information by Arnold transformation;Select part of the video key frame embedding;Transform images sequentially color space conversion,DWT,adaptive segmentation DCT,finally get watermarking coefficients;Watson model adaptive quantization watermark embedding.(3)Comprehensive evaluation of the combination of DWT and DCT adaptive quantization embedding blind video watermarking algorithm.Using Matlab simulation tools proposed algorithm simulation implementation,Combine to simulate different types of video watermarking attack validate the algorithm robustness.Experimental results show,DWT-DCT video watermarking algorithm has better imperceptibility than the traditional transform domain watermarking algorithm,and resist a variety of attacks.It is analyzed in this paper about the research on video watermarking technology,learn the past director of Algorithms,and strive to make their short,make a valid DWT-DCT video watermark embedding adaptive quantization scheme which can be used to develop video copyright protection system,in order to ensure the flow of video security products.