Multipurpose video watermarking algorithm in the hybrid compressed domain

The technologies of multimedia compression, copyright protection and content authentication are essential to the booming multimedia industry. Watermarking schemes for compressed video are effective solutions to the video industry. In this paper, we first present a hybrid video compression scheme that adopts both scalar quantisation and transform domain vector quantisation, and then a multipurpose watermarking algorithm for the hybrid compressed video is proposed. The digital fingerprint, robust and fragile watermarks are embedded in different parts of the compressed video stream to accomplish the multiple purposes of copyright protection, pirate tracing and content authentication. We first demonstrate the effectiveness of the proposed video compression scheme by comparing it with the H.263 compression standard, and then we evaluate the robustness and fragility of the proposed multipurpose watermarking algorithm against conventional attacks.