Mr. Doo Seop Choi Profile

Doo Seop Choi

at Seoul National Univ of Technology

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Proceedings Article | 17 September 2007 Paper

Digital audio watermarking using moment-preserving thresholding

Doo Seop Choi, Hae Kyung Jung, Hyuk Choi, Taejeong Kim

Proceedings Volume 6700, 67000N (2007) https://doi.org/10.1117/12.731537

KEYWORDS: Digital watermarking, Signal processing, Quantization, Binary data, Received signal strength, Information security, Computer programming, Image compression, Data communications, Digital image processing

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The Moment-Preserving Thresholding technique for digital images has been used in digital image processing for decades, especially in image binarization and image compression. Its main strength lies in that the binary values that the MPT produces as a result, called representative values, are usually unaffected when the signal being thresholded goes through a signal processing operation. The two representative values in MPT together with the threshold value are obtained by solving the system of the preservation equations for the first, second, and third moment. Relying on this robustness of the representative values to various signal processing attacks considered in the watermarking context, this paper proposes a new watermarking scheme for audio signals. The watermark is embedded in the root-sum-square (RSS) of the two representative values of each signal block using the quantization technique. As a result, the RSS values are modified by scaling the signal according to the watermark bit sequence under the constraint of inaudibility relative to the human psycho-acoustic model. We also address and suggest solutions to the problem of synchronization and power scaling attacks. Experimental results show that the proposed scheme maintains high audio quality and robustness to various attacks including MP3 compression, re-sampling, jittering, and, DA/AD conversion.

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