Abstract
This paper presents a novel adjustable audio watermarking method with high auditory quality by exploiting the discrete wavelet packet transform (DWPT), psychoacoustic modeling and distortion compensated-dither modulation (DC-DM) quantization. While the DWPT is used to divide the audio frames into several frequency sub-bands, the psychoacoustic model is intergraded to determine the appropriate sub-bands for watermarking and to control the number of embedded bits in each one. Then, the DC-DM technique is used to embed the watermark bits into the appropriate DWPT coefficients. The synchronization code technique is adopted in the proposed method to withstand desynchronization attacks. In order to achieve an adjustable watermarking scheme, two regulator parameters are provided to manage the capacity-robustness trade-off. The performance of the watermarking scheme is evaluated by examining different host audio signals under various watermarking attacks. The results show excellent imperceptibility of watermarked signals with an average ODG of − 0.3. In addition, the proposed scheme provides strong robustness against the attacks with low capacity. However, high capacity (about 2500 bps) can be achieved while maintaining a reasonable robustness. A comparison with some state-of-the-art audio watermarking schemes reveals that the proposed method provides competitive results.
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EBU: The European Broadcasting Union; SQAM: Sound Quality Material Assessment.
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Acknowledgements
This work was partly supported by the Algerian Ministry of Higher Education and Scientific Research under the grants MESRS-FNR-2013-2016 and CNEPRU J02002201000031.
The third author of this work is partly funded by the Spanish Government through grants TIN2011-27076-C03-02 “CO-PRIVACY” and TIN2014-57364-C2-2-R “SMARTGLACIS”.
The authors thank Dr. Amna Qureshi for the proof-reading of the manuscript and the corrections she has suggested.
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Hemis, M., Boudraa, B., Megías, D. et al. Adjustable audio watermarking algorithm based on DWPT and psychoacoustic modeling. Multimed Tools Appl 77, 11693–11725 (2018). https://doi.org/10.1007/s11042-017-4813-8
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DOI: https://doi.org/10.1007/s11042-017-4813-8