Patents by Inventor Claus Spenger

Claus Spenger 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).

  • Compatible multi-channel coding/decoding by weighting the downmix channel
    Patent number: 7447317
    Abstract: In processing a multi-channel audio signal having at least three original channels, a first downmix channel and a second downmix channel are provided, which are derived from the original channels. For a selected original channel of the original channels, channel side information are calculated such that a downmix channel or a combined downmix channel including the first and the second downmix channels, when weighted using the channel side information, results in an approximation of the selected original channel. The channel side information and the first and second downmix channels form output data to be transmitted to a decoder, which, in case of a low level decoder only decodes the first and second downmix channels or, in case of a high level decoder provides a full multi-channel audio signal based on the downmix channels and the channel side information.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: November 4, 2008
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V
    Inventors: Jürgen Herre, Johannes Hilpert, Stefan Geyersberger, Andreas Hölzer, Claus Spenger
  • Compatible multi-channel coding/decoding
    Publication number: 20050074127
    Abstract: In processing a multi-channel audio signal having at least three original channels, a first downmix channel and a second downmix channel are provided, which are derived from the original channels. For a selected original channel of the original channels, channel side information are calculated such that a downmix channel or a combined downmix channel including the first and the second downmix channels, when weighted using the channel side information, results in an approximation of the selected original channel. The channel side information and the first and second downmix channels form output data to be transmitted to a decoder, which, in case of a low level decoder only decodes the first and second downmix channels or, in case of a high level decoder provides a full multi-channel audio signal based on the downmix channels and the channel side information.
    Type: Application
    Filed: October 2, 2003
    Publication date: April 7, 2005
    Inventors: Jurgen Herre, Johannes Hilpert, Stefan Geyersberger, Andreas Holzer, Claus Spenger