Watermark generator, watermark decoder, method for providing a watermark signal in dependence on binary message data, method for providing binary message data in dependence on a watermarked signal and computer program using a two-dimensional bit spreading

US8989885B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Stefan Wabnik · Ilmenau, DE
• Jörg Pickel · Pommelsbrunn, DE
• Bert Greevenbosch · Rotterdam, NL
• Bernhard Grill · Lautenbächle, DE
• Ernst Eberlein · Erlangen, DE
• Giovanni Del Galdo · Martinroda, DE
• Stefan Krägeloh · Erlangen, DE
• Reinhard Zitzmann · Effeltrich, DE
• Tobias Bliem · Erlangen, DE
• Marco Breiling · Berlin, DE
• Juliane Borsum · Erlangen, DE

Key dates

• Filing date: Aug 14, 2012
• Grant date: Mar 24, 2015
• Expiry date: Jan 31, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04H60/29
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A watermark generator for providing a watermark signal in dependence on binary message data includes an information processor configured to provide, in dependence on a single message bit of the binary message data, a 2-dimensional spread information representing the message bit in the form of a set of time-frequency-domain values. The watermark generator also includes a watermark signal provider configured to provide the watermark signal on the basis of the 2-dimensional spread information.A watermark detector, methods and computer programs are also described.