**Robust Methods in Audio & Video Watermarking Joseph Huang Weechoon Teo
In this sinful world of pirates, original audio & video sequences are making many artists and professionals hungry. To combat illegal selling and copying of intellectual property, much research has been put into embedding copyright and author information in the form of a watermark into these audio & video sequences. Not only do these watermarks have to be imperceivable, they have to be able to withstand signal processing operations such as filtering, compression, averaging, resampling, quantization, etc. Also, the watermark should be able to be extracted at any particular time as well as the sequence as a whole. The use of psuedo-random noise embedded in particular components in the sequence allows the watermark to be undetectable unless the pseudo-random noise sequence is known. A robust implementation each for audio & video watermarking will be presented.

References: P. Bassia and I. Pitas. "Robust audio watermarking in the time domain," in Dept of Informatics, University of Thessaloniki.

Mitchell D. Swanson, Bin Zhu, Ahmed H. Tewfik. "Multiresolution Scene-Based video Watermarking Using Perceptual Models," in IEEE Journal on Selected Areas in Communications, Vol. 16, No. 4, May 1998.