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Proceedings Paper

Re-synchronizing audio watermarking after nonlinear time stretching
Author(s): Martin Steinebach; Sascha Zmudzinski; Stefan Nürnberger
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Paper 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.

Paper Details

Date Published: 10 February 2011
PDF: 10 pages
Proc. SPIE 7880, Media Watermarking, Security, and Forensics III, 78800I (10 February 2011); doi: 10.1117/12.872356
Show Author Affiliations
Martin Steinebach, Fraunhofer-Institut für Sichere Informations-Technologie (Germany)
Sascha Zmudzinski, Fraunhofer-Institut für Sichere Informations-Technologie (Germany)
Stefan Nürnberger, Technische Univ. Darmstadt (Germany)

Published in SPIE Proceedings Vol. 7880:
Media Watermarking, Security, and Forensics III
Nasir D. Memon; Jana Dittmann; Adnan M. Alattar; Edward J. Delp III, Editor(s)

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