Host-Interference Rejecting Spread-Spectrum Watermarking:Implementation and Implications

Abstract

Blind-detection is a desirable characteristic of watermarking schemes so that embedded payloads can be readily extracted without referencing original cover works. However, most blind-detection watermarking methods, like the famous spread-spectrum approach, suffer from inherent performance loss caused by host-interference. In this manuscript, an iterative informed-embedding spreadspectrum approach is proposed and exploited to alleviate the host-interference problems. Geometric models, detailed algorithms as well as implementation issues are provided to illustrate the effectiveness of our iterative methodology. Furthermore, inherent performance losses caused by the assumption of conventional spread-spectrum watermarking schemes - watermark signals shall be added to most perceptually significant components - is pointed out. Finally, problems and practical applications of iterative informed-embedding watermarking schemes are discussed.