A review of spread spectrum watermarking techniques
Sanjay Nilkanth Talbar, G.V. Lokhande · 2009
Most watermarking algorithms used for image, video and multimedia data are based on ideas from spread spectrum radio communications, namely additive embedding of a (signal adaptive or non-adaptive) pseudo-noise watermark pattern, and watermark recovery by correlation. Even methods that are not presented as spread spectrum methods often build on these principles. Recently, some scepticism about the robustness of spread spectrum watermarks has arisen. Spread spectrum watermarks and watermark detectors in their simplest form are vulnerable to a variety of attacks. However, with appropriate modifications to the embedding and extraction methods, spread spectrum methods can be made much more resistant against such attacks. In this paper we present critical review of latest spread spectrum watermarking techniques. (5 pages)