Journal of VLSI Signal Processing Systems - Special issue on multimedia signal processing
The first 50 years of electronic watermarking
EURASIP Journal on Applied Signal Processing - Emerging applications of multimedia data hiding
A Hybrid Watermarking Scheme for H.264/AVC Video
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 4 - Volume 04
A new uncompressed-domain video watermarking approach robust to H.264/AVC compression
SPPRA'06 Proceedings of the 24th IASTED international conference on Signal processing, pattern recognition, and applications
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
Geometric warping watermarking extended concerning geometric attacks and embedding artifacts
Proceedings of the 9th workshop on Multimedia & security
Disappearing Cryptography: Information Hiding: Steganography & Watermarking
Disappearing Cryptography: Information Hiding: Steganography & Watermarking
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Our paper proposes an enhanced video watermarking approach. The fundamental idea is to use geometric warping for watermarks with high predictable robustness to lossy compression. We explain the basic watermarking approach which uses a block based statistic (Normed Centre of Gravity - NCG) to describe the geometric structure of blocks. The NCG also is used to choose robust blocks. To embed the watermark information the chosen blocks are changed by geometric warping. To extract the watermark, the original video is not necessary. The NCG is used to detect the watermarked blocks and compute the embedded watermark bit. In some cases, the independent geometric warping of blocks which contain the same object results in visible artifacts. We propose to link blocks in space and time to block groups. In contrast to the basic approach, the blocks of one block group can be warped in dependence on each other. Thus, the visible artifacts are prevented.