Condition for Energy Efficient Watermarking with Random Vector Model without WSS Assumption

Details Condition for Energy Efficient Watermarking with Random Vector Model without WSS Assumption Condition for Energy Efficient Watermarking with Random Vector Model without WSS Assumption

2009-01-11

arxiv.org/abs/0901.1407v1

Computer Science

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10 pages, 2 figures, submitted to IEEE Signal Processing Letter for review

Scientific paper

Energy efficient watermarking preserves the watermark energy after linear attack as much as possible. We consider in this letter non-stationary signal models and derive conditions for energy efficient watermarking under random vector model without WSS assumption. We find that the covariance matrix of the energy efficient watermark should be proportional to host covariance matrix to best resist the optimal linear removal attacks. In WSS process our result reduces to the well known power spectrum condition. Intuitive geometric interpretation of the results are also discussed which in turn also provide more simpler proof of the main results.

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