A video watermarking algorithm based on pseudo 3D DCT

In this paper, we propose an adaptive video watermarking algorithm based on a pseudo 3D DCT to insert the high transparency and slight distortion messages to resist the attacks. The watermark is mainly inserted into the uncompressed domain by adjusting the correlation between DCT coefficients of the selected blocks, and the watermark extraction is blind, i.e., no original unwatermarked video is needed for watermark extraction. The system consists of pseudo 3D DCT technique, watermark embedding, and extraction. A pseudo 3D DCT technique will utilize to calculate the embedding factor and the advantageous messages. In the embedding process, using the quantization index modulation (QIM), we embed the watermark into the quantization regions from the successive raw frames in the uncompressed domain and record the relative information to create a secret embedding key. This secret embedding key will further apply to watermark extraction. Experimental results show that the proposed method can obtain the good performance in transparency and robustness against various attacks such as filtering, compression, and addition of noise.