Technical Program

Paper Detail

Session:Watermarking II
Time:Thursday, May 20, 13:00 - 13:20
Presentation: Lecture
Topic: Image and Multidimensional Signal Processing: Image and Video Authentication and Watermarking
Authors: Pierre Moulin; University of Illinois at Urbana-Champaign 
 Anil Kumar Goteti; University of Illinois at Urbana-Champaign 
 Ralf Koetter; University of Illinois at Urbana-Champaign 
Abstract: The problem of blind watermarking of an arbitrary host signalin R^n under squared-error distortion constraints and Gaussian attacks is considered in this paper. While distortion-compensated lattice quantization index modulation (QIM) using nearly spherical Voronoi cells is known to be asymptotically capacity-achieving in this setup, our results suggest that such schemes are suboptimal in terms of error probability when the number of possible messages is subexponential in n. Our conjecture is substantiated by examples involving low-dimensional lattices and is related to the simplex conjecture in coding theory.

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