An adaptive video watermarking technique based on DCT domain

In this paper, we propose an effective video embedded watermarking technique based on DCT domain with high transparency and slight distortion. The watermark is mainly embedded into the uncompressed domain by adjusting the correlation between DCT coefficients of the selected blocks, and it can be detected without the original video data. The system contains the preprocessing, watermark embedding and watermark extraction. In the preprocessing, in order to improve the computation complexity and reduce the computation time, a pseudo 3D DCT by two times of the DCT transformation will firstly be obtained. In the embedding process, we embed the watermark into the successive raw frames transformed into the pseudo codes before compression, afterward a secret embedding key will be created. This secret embedding key will further use to the extraction processing. The experimental results show that the proposed scheme is extremely robust to against various attacks.