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Forensic audio watermark detection

 
: Steinebach, M.; Zmudzinski, S.; Petrautzki, D.

:

Memon, N.D. ; Society for Imaging Science and Technology -IS&T-; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Media watermarking, security, and forensics 2012 : 23 - 25 January 2012, Burlingame, California, United States; proceedings
Bellingham, WA: SPIE, 2012 (Proceedings of SPIE 8303)
ISBN: 978-0-8194-8950-0
Paper 83030G
Conference "Media Watermarking, Security, and Forensics" <2012, Burlingame/Calif.>
Electronic Imaging: Science and Technology Symposium (IS&T) <2012, Burlingame/Calif.>
English
Conference Paper
Fraunhofer SIT ()

Abstract
Digital audio watermarking detection is often computational complex and requires at least as much audio information as required to embed a complete watermark. In some applications, especially real-time monitoring, this is an important drawback. The reason for this is the usage of sync sequences at the beginning of the watermark, allowing a decision about the presence only if at least the sync has been found and retrieved. We propose an alternative method for detecting the presence of a watermark. Based on the knowledge of the secret key used for embedding, we create a mark for all potential marking stages and then use a sliding window to test a given audio file on the presence of statistical characteristics caused by embedding. In this way we can detect a watermark in less than 1 second of audio.

: http://publica.fraunhofer.de/documents/N-206787.html