Abstract
We study watermarking techniques based on Quantization Index Modulation for which sets of lattice quantizers Q m are used (LQIM). A recipe for constructing such quantizers Q m is proposed, where the size of these sets is variable, so that the payload is easily adaptable. We make a comparative study of 8 dimensional lattices with good quantizer properties, where the embedding is done in the wavelet domain. Along the way, the gap between the theoretical ideas behind QIM and practical systems using lattices is closed by extending techniques, such as dithered quantizers and distortion compensation, from the scalar case to LQIM.
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Bardyn, D., Dooms, A., Dams, T., Schelkens, P. (2009). Comparative Study of Wavelet Based Lattice QIM Techniques and Robustness against AWGN and JPEG Attacks. In: Ho, A.T.S., Shi, Y.Q., Kim, H.J., Barni, M. (eds) Digital Watermarking. IWDW 2009. Lecture Notes in Computer Science, vol 5703. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-03688-0_7
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DOI: https://doi.org/10.1007/978-3-642-03688-0_7
Publisher Name: Springer, Berlin, Heidelberg
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