Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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An Efficient Selective Method for Audio Watermarking Against De-synchronization Attacks

  • Received : 2016.06.05
  • Accepted : 2017.09.26
  • Published : 2018.01.01
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Abstract

The high capacity audio watermarking algorithms are facing a main challenge in satisfying the robustness against attacks especially on de-synchronization attacks. In this paper, a robust and a high capacity algorithm is proposed using segment selection, Stationary Wavelet Transform (SWT) and the Quantization Index Modulation (QIM) techniques along with new synchronization mechanism. The proposed algorithm provides enhanced trade-off between robustness, imperceptibility, and capacity. The achieved watermarking improves the reliability of the available watermarking methods and shows high robustness towards signal processing (manipulating) attacks especially the de-synchronization attacks such as cropping, jittering, and zero inserting attacks. For imperceptibility evaluation, high signal to noise ratio values of above 22 dB has been achieved. Also subjective test with volunteer listeners shows that the proposed method has high imperceptibility with Subjective Difference Grade (SDG) of 4.76. Meanwhile, high rational capacity up to 176.4 bps is also achieved.

Keywords

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Fig. 1. Synchronization method in proposed algorithm

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Fig. 2. Calculation of SWT: (a) Decomposition step, (b)Filter computation for next level

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Fig. 3. Flowchart for embedding process

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Fig. 4. Flowchart for extracting process

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Fig. 5. Evaluation of the proposed algorithm

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Fig. 6. Difference between original and watermarked signal

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Fig. 7. Mean SDG values of ten clips for ten volunteerlicensers

Table 1. Robustness evaluation against various attacks

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