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MMSEC
2005
ACM

Watermarking of MPEG-2 video in compressed domain using VLC mapping

10 years 4 months ago
Watermarking of MPEG-2 video in compressed domain using VLC mapping
In this work we propose a new algorithm for fragile, high capacity yet file-size preserving watermarking of MPEG-2 streams. Watermarking is done entirely in the compressed domain, with no need for full or even partial decompression. The algorithm is based on a previously developed concept of variable length code (VLC). The entropy-coded segment of the video is first parsed out and then analyzed in pairs. It is recognized that there are VLC pairs that never appear together in any intra-coded block. The list of “unused” pairs is systematically generated by the intersection of “pair trees.” One of the trees is generated from the main VLC table given in ISO/IEC13818-2:1995 standard. The other trees are dynamically generated for each intra coded blocks. Forcing one VLC pairs in a block to one of the unused ones generates a watermarked block. The change is done while maintaining run/level change to a minimum. At the decoder, the main pair tree is created offline using publicly avail...
Bijan G. Mobasseri, Michael P. Marcinak
Added 26 Jun 2010
Updated 26 Jun 2010
Type Conference
Year 2005
Where MMSEC
Authors Bijan G. Mobasseri, Michael P. Marcinak
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