Wavelet-domain audio watermarking using optimal modification on low-frequency amplitude

Shuo-Tsung Chen; Chih-Yu Hsu; Hunag-Nan Huang

Wavelet-domain audio watermarking using optimal modification on low-frequency amplitude

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Author(s): Shuo-Tsung Chen ^{1, 2} ; Chih-Yu Hsu ³ ; Hunag-Nan Huang ²
- Affiliations: 1: Sustainability Research Center, Tunghai University, Taichung 40704, Taiwan (R.O.C);
  2: Department of Applied Mathematics, Tunghai University, Taichung 40704, Taiwan (R.O.C);
  3: Department of Information and Communication Engineering, Chaoyang University of Technology, Taichung 413, Taiwan (R.O.C)
Source: Volume 9, Issue 2, April 2015, p. 166 – 176
DOI: 10.1049/iet-spr.2013.0399 , Print ISSN 1751-9675, Online ISSN 1751-9683

Received 07/10/2013, Accepted 26/08/2014, Revised 17/07/2014, Published 10/04/2015

On the basis of the Karush–Kuhn–Tucker (KKT) theorem, a novel digital audio watermarking scheme is proposed. To guarantee the robustness of a watermark, this scheme embeds information into low-frequency coefficients of audio's discrete wavelet transform. For the modification of low-frequency amplitude, this study uses the KKT theorem to minimise the difference between the original and the watermarked coefficients. Accordingly, embedding strength is increased to enhance the most robustness of a watermarked audio under sufficient embedding capacity and audio quality. In addition, the proposed watermarking scheme can extract the hidden data without the knowledge of original audio signal. Experimental results indicate that the performance of the proposed scheme is mostly better than other amplitude modification methods.

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Wavelet-domain audio watermarking using optimal modification on low-frequency amplitude

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