An Audio Watermarking Technique That Is Robust Against Random Cropping
Computer Music Journal
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Watermarking is a technique used to label digital media,to protect copyright ownership, by hiding information intothe signal. Watermarks must be imperceptible and robustagainst attacks. Besides, watermark robustness againstseveral signal processing techniques can be ensured byexploiting a technique related to the spread spectrumcommunications. In this paper, we propose a procedurebased on frequential substitution using a BPSKmodulation with an adaptive carrier frequency, the choiceof which depends on the original signal features. A secretkey, generated during watermarking process, is used forretrieving hidden information.