A Robust Combined Audio and Video Watermark Algorithm Against Cinema Piracy

The current trend in Moroccan digital cinema is to make feature films available online. In order to counter illegal distribution of media files in Morocco, this paper suggests an effective algorithm that combines processing of both audio and video streams. We extract an audio fingerprint pattern which is embedded in video frames as a watermark using the discrete wavelet transform. The two data streams are then synchronized using a time code, and the final multimedia protected content is exported in JPEG2000 format, which is the format used for Digital Cinema Package (DCP) in Morocco. Experimental results show that the proposed algorithm provides a high level of robustness, while the use of watermarks in a combination of audio and video streams allows to enhance the security of multimedia content.