Research On New Techniques For Digital Images And Video Watermarking Embedding

The digitization has offered great convenience for the storage and using of the multimedia information and improved the efficiency and accuracy of information expressing greatly at the same time. With the rapidly development of the computer and network technology, Internet has already become the most convenient and the low-priced way to propagate digital products which include electronic publication, digital audio and video, digital cartoon and picture and the limitless business opportunity has appeared with the development of E-commerce technology. But we must also face a new severe challenge which is duplicating, spreading and distorting illegally of digital products because the case of quality degradation which occurred frequently in analog reproduction do not take place while duplicating the digital information products, it is totally lossless to reproduce the digital information. With the performance strengthens and price reducing constantly of the various kinds of digital hardware products, the wanton behavior of duplicating the digital products overflows more and more. This is very unfavorable to those authors of digital works. Meanwhile the performance of the personal computer is stronger and stronger now, it is also popularized very much that the application of various kinds of software for editing picture, audio and video, on one hand people can enjoy the facility brought by these software, on the other hand tampering content of digital products become very easy.In order to solve this problem, digital watermarking technology is used to label the original creator's ownership or proving to the authenticity and integrality of the digital works through embedding a kind of invisibility mark into the multimedia information products. As a new effective technological means to the copyright protection and content authenticity of digital information products, the digital watermarking technology has already become the research focus of the field of information security nowadays.The digital image is the most common multimedia information on the network, which is also very easy to be copied and revised. The watermarking of digital image is paid the close attention among all digital watermarking technology and the basic principle and frame of the watermarking of digital image have been analyzed. Although some literatures consider watermarking detection should be the focal point that watermarking study at present, this paper still thinks that the embedding technology of watermarking is the determinant factor which deciding the performance of watermarking system and it is still necessary to study new embedding tactics according to the new transformation methods.There are three kinds of image watermarking embedding algorithm proposed in this paper. One is the watermarking embedding method based on the fractal transformation that is completely different from traditional method to realize the image compression, it contributes to resisting these kinds of attacks based on fractal transformation by embedding watermarking according to its characteristic. The other two are blind watermarking methods that realized by using the DCT and DWT coefficiences of the image blocks. It is of important practical value for this method because the primitive information is no needed when watermarking detection.The movie & TV industry represented by film and TV play has already become an industry with enormous profit space and its digitization has brought the question of copyright protection too because digital video watermarking may become key technology of the digital audio-visual products copyright protection system, which concerned by electronic manufacturer and researcher extremely. H.264 is a new kind of video coding standard and a lot of fine characteristics that it has make it become the applicable video standard of next generation and win extensive application, intra-frame prediction, 1/4 pixel precision movement estimate make it can obtain than before video standard high compression ratio and video quality much. But these new characteristics that it uses are unfavorable to the method to adopt traditional video watermarking to embedding the watermarking again. A quick embedding watermarking tactics based on H.264 coding standard was put forward to in this paper which can detect blindly the watermarking message and has low computer complexity.Digital Rights Management (DRM) system are intended to provide a controlled consumption of digital content to protect the intellectual property rights of the authors and the content providers. It specifies the permissions, constraints, obligations, conditions, and agreements with the holders of intellectual property for content usage. Digital watermarking is the basic method by which the DRM realize copyright protection. Robust watermarking methods can hold out the attacks which attempt to get rid of watermarking, but these methods can't resist to the watermarking protocol attack which disturbing the copyright authentication through add a counterfeit watermarking rather than to get rid of watermarking. Digital signature is the effective tactics of resisting this kind of attack. Through analyzing structure of DRM system and application of watermark technology among them, the application frame of introducing to DRM system of combining digital watermarking and PKI is proposed in this paper, the function of the application frame was described and the performances of resisting to watermarking protocol attack was analyzed.