Patent №
US 8,965,547
Granted
2015-02-24
Filed 2012
Owner
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Lab
—
AI components
1
speech
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
13593016
A watermark signal provider provides a watermark signal suitable for being hidden in an audio signal when the watermark signal is added to the audio signal, such that the watermark signal represents watermark data. The watermark signal provider includes a psychoacoustical processor for determining a masking threshold of the audio signal; and a modulator for generating the watermark signal from a superposition of sample-shaping functions spaced apart from each other at a sample time interval of a time-discrete representation of the watermark data, each sample-shaping function being amplitude-weighted with a respective sample of the time-discrete representation, multiplied by a respective amplitude weight depending on the masking threshold, the modulator being configured such that the sample time interval is shorter than a time extension of the sample-shaping functions; and the respective amplitude weight also depends on samples of the time-discrete representation neighboring the respective sample in time.
AI classification
Ownership
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
assignment · 292560066
Assignors
WABNIK, STEFAN, PICKEL, JOERG, GREEVENBOSCH, BERT, GRILL, BERNHARD, EBERLEIN, ERNST, DEL GALDO, GIOVANNI, KRAEGELOH, STEFAN, ZITZMANN, REINHARD, BLIEM, TOBIAS, BREILING, MARCO, BORSUM, JULIANE
On an employer assignment, the assignors are typically the inventors.