| In recent years, with the continuous progress of multimedia technology and the increasing popularity of computer networks, the storage and transmission of the digital medital are more convenient. But it has also been stealed and modified easily and it has been harmed the legitimate rights and interests of the manufacturers seriously. As an effentive method to provide copyright protection for digital media, digital watermarking technology has drawn extersice attention, especially digital video watermarking in recent years.For this paper, some importand topics about digital watermarking are discussed, which include not only the concept and the present research but also the system model and some classic algorithms. Apart from that, proposed an adaptive video watermarking based on chaos theory and three-dimensional wavelet transformation. For the two value watermark image, we present an encrpytion algorithm based on chaotic scrambling. For the large amount of video information datas, we use the technology of video segmentation and key scene choosen and then embed the scrambled watermark to the key frame. For the elected key frame sets, the watermarking information is embedded into three dimention wavelet codfficient, it is to say that, and the watermarking information is embedded into each componets of video sequence, including the static and the dynamic compoents. According to the characters of original video and the watermark itself, do embedding adaptively. It can make the video watermarking algorithm more robust and confident. Under the premise of requiring no original video, use the relationship in the process of adaptive embedding, test the video watermarking blindly.In light of a variety of video watermarking attacks, this paper proposed a video watermarking algorithm and the algorithm is tested. The experimental results show that under the premise of unvisible, the algorithm is robust, and it has certain reference value to the practical application. |
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