A spread spectrum watermarking scheme based on periodic clock changes for digital images

Authors:
Vincent Martin;Marie Chabert;Bernard Lacaze
Affiliations:
ENSEEIHT/IRIT, National Polytechnic Institute of Toulouse, Toulouse, France;ENSEEIHT/IRIT, National Polytechnic Institute of Toulouse, Toulouse, France;INSA/IRIT
Venue:
IH'05 Proceedings of the 7th international conference on Information Hiding
Year:
2005

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Abstract

This paper proposes a spread spectrum watermarking scheme based on periodic clock changes (PCC) for digital images. The PCC spreading properties and applications in multiuser communications are recalled. This alternative spread spectrum technique is compared with a classical Direct Sequence (DS) method in terms of robustness to attacks and noise, secret message bit rate and multiple watermarking performance. PCC proves to be a simple alternative to pseudo-noise modulation spreading methods, that provides similar performance.