Robust patchwork-based watermarking method for stereo audio signals

Natgunanathan, Iynkaran, Xiang, Yong, Rong, Yue and Peng, Dezhong 2014, Robust patchwork-based watermarking method for stereo audio signals, Multimedia tools and applications, vol. 72, no. 2, pp. 1-24, doi: 10.1007/s11042-013-1454-4.

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Title Robust patchwork-based watermarking method for stereo audio signals
Author(s) Natgunanathan, IynkaranORCID iD for Natgunanathan, Iynkaran orcid.org/0000-0003-4215-000X
Xiang, YongORCID iD for Xiang, Yong orcid.org/0000-0003-3545-7863
Rong, Yue
Peng, Dezhong
Journal name Multimedia tools and applications
Volume number 72
Issue number 2
Start page 1
End page 24
Total pages 24
Publisher Springer
Place of publication Berlin, Germany
Publication date 2014-09
ISSN 1380-7501
1573-7721
Keyword(s) Audio watermarking
Discrete Fourier transform
Patchwork
Stereo audio signal
Summary This paper presents a patchwork-based watermarking method for stereo audio signals, which exploits the similarity of the two sound channels of stereo signals. Given a segment of stereo signal, we first compute the discrete Fourier transforms (DFTs) of the two sound channels, which yields two sets of DFT coefficients. The DFT coefficients corresponding to certain frequency range are divided into multiple subsegment pairs and a criterion is proposed to select those suitable for watermark embedding. Then a watermark is embedded into the selected subsegment pairs by modifying their DFT coefficients. The exact way of modification is determined by a secret key, the watermark to be embedded, and the DFT coefficients themselves. In the decoding process, the subsegment pairs containing watermarks are identified by another criterion. Then the secret key is used to extract the watermark from the watermarked subsegments. Compared to the existing patchwork methods for audio watermarking, the proposed method does not require knowledge of which segments of the watermarked audio signal contain watermarks and is more robust to conventional attacks.
Language eng
DOI 10.1007/s11042-013-1454-4
Field of Research 080107 Natural Language Processing
Socio Economic Objective 890404 Publishing and Print Services (incl. Internet Publishing)
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30060841

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