A quantified fidelity criterion for parameter-embedded watermarking of audio archives

A novel algorithm for speech watermarking through parametric modelling is enhanced by inclusion of a quantified fidelity criterion. Watermarking is effected through solution of a set-membership filtering (SMF) problem, subject to an l/sub /spl infin// fidelity criterion in the signal space. The SMF approach provides flexibility in obtaining watermark solutions that trade-off watermark robustness and stegosignal fidelity.