Affiliation:
1. Jiang Xi Normal University
2. JiangXi Normal University
Abstract
A mutual information function was defined as a criterion measuring the robustness of watermarking algorithm. Considering QIM scheme, error probability of watermarking can be calculated to validate the measurement of mutual information function. By mean of numerical computation, mutual information under Gaussian noise and uniform noise is calculated with change of noise standard deviation. In the experiment, an audio section is selected as the host and their third lever wavelet detail coefficients are quantified according to watermark bit series. Experiment results show that statistic Bit Error Rate (BER) is matched with evaluation conclusion of mutual information method when step is on the small side. Mutual information function can be selected as a cost function to evaluate the robustness of watermarking algorithm, and predict the BER.
Publisher
Trans Tech Publications, Ltd.
Reference7 articles.
1. M.H.M. Costa. Writing on dirty paper[J]. IEEE Transactions on Information Theory, 1983, IT-29(3): 439–441.
2. S.I. Gel'fand, M.S. Pinsker, Coding for channel with random parameters [J]. Problems of Control and Information Theory , 1980, 9(1), 19–31.
3. B. Chen and G. W. Wornell, Provably robust digital watermarking[C]. Proc. SPIE, vol. 3845 of Multimedia Syst. Applications II, 1999, p.43–54.
4. N. Merhav, E. Sabbag. Optimal watermark embedding and detection strategies under limited detection resources[J]. IEEE Transactions on Information Theory, 2008, 54(1): 255-274.
5. H.T. Sencar, M. Ramkumar, A.N. Akansu. An overview of scalar quantization based data hiding methods[J]. Signal processing, 2006, 86(5): 893-914.