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A Random Coding Error Exponent for Joint Quantization and Watermarking of Gaussian Sources under Memoryless Gaussian Attacks
 

Summary: A Random Coding Error Exponent for Joint Quantization and Watermarking
of Gaussian Sources under Memoryless Gaussian Attacks
Yadong Wang, Fady Alajaji and Tam´as Linder
Department of Mathematics and Statistics
Queen's University, Kingston, ON, K7L 3N6, Canada
Email: {yadong, fady, linder}@mast.queensu.ca
Abstract-- We study joint quantization and watermarking
of a memoryless Gaussian source under memoryless additive
Gaussian attacks in a private scenario. The achievable region
involving the quantization and the watermarking rate pairs has
been established by Karakos and Papamarcou (2003). In this
paper, we refine the analysis of the watermarking decoding
error probability for given achievable rate pairs by deriving a
computable random coding lower bound to the error exponent.
The random coding exponent is positive within almost the entire
achievable region of Karakos and Papamarcou.
I. INTRODUCTION
In a joint compression and embedding information-hiding
model, the watermarker encodes a watermark and a covertext
jointly to output a (compressed) stegotext. Denoting the quan-

  

Source: Alajaji, Fady - Department of Mathematics and Statistics, Queen's University (Kingston)
Linder, Tamás - Department of Mathematics and Statistics, Queen's University (Kingston)

 

Collections: Engineering