Signal Processing - Special issue on current topics in adaptive filtering for hands-free acoustic communication and beyond
VQ-based watermarking scheme with genetic codebook partition
Journal of Network and Computer Applications - Special issue: Network and information security: A computational intelligence approach
Spread-spectrum watermarking of audio signals
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Histogram-Based Audio Watermarking Against Time-Scale Modification and Cropping Attacks
IEEE Transactions on Multimedia
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The eigenvalues decomposition based on the S-method is employed to extract the specific time-frequency characteristics of speech signals. This approach is used to create a flexible speech watermark, shaped according to the time-frequency characteristics of the host signal. Also, the Hermite projection method is applied for characterization of speech regions. Namely, time-frequency regions that contain voiced components are selected for watermarking. The watermark detection is performed in the time-frequency domain as well. The theory is tested on several examples.