An information-theoretic approach to the design of robust digital watermarking systems

Authors:
B. Chen;G. W. Wornell
Affiliations:
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA;-
Venue:
ICASSP '99 Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 04
Year:
1999

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Abstract

A variety of emerging applications require the design of systems for embedding one signal within another signal. We describe a new class of embedding methods called quantization index modulation (QIM) and develop a realization termed coded dither modulation in which the embedded information modulates the dither signal of a dithered quantizer. We also develop a framework in which one can analyze the performance trade-offs among robustness, distortion, and embedding rate, and we show that QIM systems have considerable performance advantages over previously proposed spread-spectrum and low-bit modulation systems.