Multiple video watermarks based on 3D-DWT and 3D-DCT robust to geometrical attacks

For the copyright protection of digital video, a new video watermarking algorithm based on 3D-DWT&DCT is proposed. We select video segment and get 3D-DWT&DCT coefficients using 3D-DWT&DCT. The sign sequence of 3DDWT&DCT coefficients is used as feature vector, which is utilized to enhance the robustness against geometrical attacks. Combining the concept of third-party, we describe how to embed and extract the multiple watermarks. Simulation results demonstrate the proposed algorithm has strong robustness to geometrical attacks.