MPEG-2 Video Watermarking Using Pattern Consideration

This paper proposes a new method for digital video watermarking in compressed domain. Both the embedding and extracting phases are performed after entropy decoding. Consequently, fully decompressing the compressed video is not necessary making this scheme an appropriate choice for real-time application. Furthermore, taking the structural information into account leads to presenting a robust watermarking scheme along with less quality degradation. To select suitable coefficients for embedding the watermark, three different aspects, imperceptibility, security, and bit rate increase, have been considered. These performance factors are adjusted by defining three priority matrices. In addition, a content based key is proposed in order to overcome the collusion attack. The flexibility of our method to provide desired characteristic can be expressed as another advantage.