Patent ID: 7676336
Filing Date: 2010-03-09
Classification: H04H

Abstract:
1. A device for introducing a watermark into an information signal, comprising: a first transferrer for transferring a time representation of the information signal to a time/spectral representation of the information signal, by block-wisely spectrally decomposing the time representation of the information signal; a second transferrer for transferring the time/spectral representation of the information signal to a spectral/modulation spectral representation of the information signal, by block-wisely spectrally decomposing the time/spectral representation of the information signal; a modifier for modifying the spectral/modulation spectral representation of the information signal in dependence on the watermark to be introduced to obtain a modified spectral/modulation spectral representation; and a processor for forming an information signal provided with a watermark based on the modified spectral/modulation spectral representation.