Robust audio watermarking using multiwavelet transform and genetic algorithm

Authors:
Prayoth Kumsawat;Kitti Attakitmongcol;Arthit Srikaew
Affiliations:
School of Telecommunication Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima, Thailand;School of Electrical Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima, Thailand;School of Electrical Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima, Thailand
Venue:
WSEAS TRANSACTIONS on SYSTEMS
Year:
2010

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Abstract

In this paper, we propose a new approach for optimization in digital audio watermarking using artificial intelligent technique. The watermarks are embedded into the low frequency coefficients in discrete multiwavelet transform domain. The embedding technique is based on quantization process which does not require the original audio signal in the watermark extraction. We have developed an optimization technique using the genetic algorithm to search for optimal quantization step in order to improve both quality of watermarked audio and robustness of the watermark. In addition, we analyze the performance of the proposed algorithm in terms of signal-to-noise ratio, normalized correlation and bit error rate. The experimental results show that our proposed method can improve the quality of the watermarked audio signal and give more robustness of the watermark as compared to previous works.