Patents by Inventor Stefan Krageloh

Stefan Krageloh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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
    Patent number: 8989885
    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.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: March 24, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Stefan Wabnik, Jörg Pickel, Bert Greevenbosch, Bernhard Grill, Ernst Eberlein, Giovanni Del Galdo, Stefan Krägeloh, Reinhard Zitzmann, Tobias Bliem, Marco Breiling, Juliane Borsum
  • Device and method for detecting a manipulation of an information signal
    Patent number: 8135955
    Abstract: The present invention relates to a device for detecting a manipulation of an information signal, having an extractor for extracting an information signal component characteristic for the information signal from the information signal, an encrypter for encrypting the information signal component to obtain an encrypted signal, and a comparator for comparing the encrypted signal to a reference signal, wherein the reference signal is an encrypted representation of a non-manipulated reference signal component of a reference information signal to detect the manipulation.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: March 13, 2012
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Ralph Kulessa, Jörg Pickel, Stefan Krägeloh, Patrick Aichroth, Frank Siebenhaar, Christian Neubauer, Wolfgang Spinnler
  • DEVICE AND METHOD FOR DETECTING A MANIPULATION OF AN INFORMATION SIGNAL
    Publication number: 20110099386
    Abstract: The present invention relates to a device for detecting a manipulation of an information signal, having an extractor for extracting an information signal component characteristic for the information signal from the information signal, an encryptor for encrypting the information signal component to obtain an encrypted signal, and a comparator for comparing the encrypted signal to a reference signal, wherein the reference signal is an encrypted representation of a non-manipulated reference signal component of a reference information signal to detect the manipulation.
    Type: Application
    Filed: December 1, 2010
    Publication date: April 28, 2011
    Inventors: Ralph KULESSA, Jörg Pickel, Stefan KRÄGELOH, Patrick Aichroth, Frank Siebenhaar, Christian Neubauer, Wolfgang Spinnler
  • Device and method for detecting a manipulation of an information signal
    Patent number: 7917763
    Abstract: The present invention relates to a device for detecting a manipulation of an information signal, having an extractor for extracting an information signal component characteristic for the information signal from the information signal, an encryptor for encrypting the information signal component to obtain an encrypted signal, and a comparator for comparing the encrypted signal to a reference signal, wherein the reference signal is an encrypted representation of a non-manipulated reference signal component of a reference information signal to detect the manipulation.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: March 29, 2011
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Ralph Kulessa, Jörg Pickel, Stefan Krägeloh, Patrick Aichroth, Frank Siebenhaar, Christian Neubauer, Wolfgang Spinnler
  • DEVICE AND METHOD FOR DETECTING A MANIPULATION OF AN INFORMATION SIGNAL
    Publication number: 20070277041
    Abstract: The present invention relates to a device for detecting a manipulation of an information signal, having an extractor for extracting an information signal component characteristic for the information signal from the information signal, an encryptor for encrypting the information signal component to obtain an encrypted signal, and a comparator for comparing the encrypted signal to a reference signal, wherein the reference signal is an encrypted representation of a non-manipulated reference signal component of a reference information signal to detect the manipulation.
    Type: Application
    Filed: May 10, 2007
    Publication date: November 29, 2007
    Inventors: Ralph KULESSA, Jorg Pickel, Stefan Krageloh, Patrick Aichroth, Frank Siebenhaar, Christian Neubauer, Wolfgang Spinnler
  • Apparatus for checking audio signal processing systems
    Patent number: 5014318
    Abstract: Disclosed is an apparatus for checking audio signal processing systems. The apparatus has the following features:the apparatus is provided with a first input connection, to which the input signal of the audio processing system to be checked is transmitted, a second input connection, to which the output signal of said system is transmitted, and a signal processor.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: May 7, 1991
    Assignee: Fraunhofer Gesellschaft zur Forderung der angewandten Forschung e. v.
    Inventors: Hartmut Schott, Dieter Seitzer, Heinz Gerhauser, Karlheinz Brandenburg, Ernst Eberlein, Stefan Krageloh, Rolf Kapust, Harald Popp