Watermark signal provider and method for providing a watermark signal

US9214159B2 · kind B2 · utility

Assignee

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

Inventors

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

Key dates

• Filing date: Aug 24, 2012
• Grant date: Dec 15, 2015
• Expiry date: Sep 8, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L19/018
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A watermark signal provider comprises a time-frequency-domain waveform provider to provide time-domain waveforms for a plurality of frequency subbands. The time-frequency-domain waveform provider is configured to map a given value of a time-frequency-domain representation onto a bit shaping function, a temporal extension of which is longer than a bit interval, such that there is a temporal overlap between bit shaped functions provided for temporally subsequent values of the time-frequency-domain representation of the same frequency subband. A time-domain waveform of a given frequency subband contains a plurality of bit shaped functions provided for temporally subsequent values of the time-frequency-domain representation. The water mark signal provider further has a time-domain waveform combiner.