A Digital Video Watermarking Algorithm Based on DCT Domain

In order to solve the conflict with robustness and invisibility of video watermark, the algorithms proposed in this paper select certain blocks according to the texture. By using the binary image to deal with logistic chaotic map and error-correction coding as watermarked data can improve the robustness and security. The low frequency signals of the selected blocks are modified such that their Discrete Cosine Transform (DCT) fulfills a constraint imposed by the watermark code. Experiment results show that this algorithm provides a larger embedding capacity and has a certain robustness and invisibility.