10 February 2011 Re-synchronizing audio watermarking after non-linear time stretching
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Abstract
Digital audio watermarking today is robust to many common attacks, including lossy compression and digital-to-analogue conversion. One robustness and security challenge, still, is time-stretching. This operation speeds up or slows down the playback speed while preserving the tone pitch. Although inaudible for an uninformed listener if smoothly applied, time-stretching can be confusing for a blind watermark detection algorithm. We introduce a non-blind approach for reconstructing the original timing based on dynamic time warping. Our experiments show that the approach is successful even if non-linear stretching was applied. Our solution can significantly increase the robustness and security of every audio watermarking scheme that is dependent on precise timing conditions at detection time.
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Martin Steinebach, Martin Steinebach, Sascha Zmudzinski, Sascha Zmudzinski, Stefan Nürnberger, Stefan Nürnberger, } "Re-synchronizing audio watermarking after non-linear time stretching", Proc. SPIE 7880, Media Watermarking, Security, and Forensics III, 78800I (10 February 2011); doi: 10.1117/12.872356; https://doi.org/10.1117/12.872356
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