Method of embedding a digital watermark in a useful signal

Details Method of embedding a digital watermark in a useful signal Method of embedding a digital watermark in a useful signal

G - Physics

10

L

G10L 19/00 (2006.01)

Patent

CA 2595343

Method of embedding a digital watermark in a useful signal, wherein a watermark bit sequence is embedded into the frequency domain of the useful signal using adaptive frequency modulation of two given frequencies by tracking amplitudes of the chosen frequencies of the original signal and modifying them according to the current bit of watermark bit sequence.

L~invention concerne un procédé d~inclusion d~un filigrane numérique dans un signal utile, dans lequel une séquence de bits de filigrane est incluse dans le domaine de fréquence d~un signal utile grâce à l~utilisation d~une modulation de fréquence adaptative de deux fréquences données en suivant les amplitudes des fréquences choisies du signal original et en les modifiant selon le bit actuel de la séquence de bits du filigrane.

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