Patents by Inventor Karl Jonas Roeden

Karl Jonas Roeden 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).

  • Patent number: 8626503
    Abstract: An audio encoder (109) has a hierarchical encoding structure and generates a data stream comprising one or more audio channels as well as parametric audio encoding data. The encoder (109) comprises an encoding structure processor (305) which inserts decoder tree structure data into the data stream. The decoder tree structure data comprises at least one data value indicative of a channel split characteristic for an audio channel at a hierarchical layer of the hierarchical decoder structure and may specifically specify the decoder tree structures to be applied by a decoder. A decoder (115) comprises a receiver (401) which receives the data stream and a decoder structure processor (405) for generating the hierarchical decoder structure in response to the decoder tree structure data. A decode processor (403) then generates output audio channels from the data stream using the hierarchical decoder structure.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: January 7, 2014
    Inventors: Erik Gosuinus Petrus Schuijers, Gerard Herman Hotho, Heiko Purnhagen, Wolfgang Alexander Schildbach, Holger Horich, Hans Magnus Kristofer Kjoerling, Karl Jonas Roeden
  • Publication number: 20120207307
    Abstract: The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the apparatus comprises an upmix stage. The upmix stage is configured to generate the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.
    Type: Application
    Filed: September 7, 2010
    Publication date: August 16, 2012
    Inventors: Jonas Engdegard, Heiko Purnhagen, Karl Jonas Roeden
  • Patent number: 8144879
    Abstract: A method and a device are described for processing a stereo signal obtained from an encoder, which encodes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (LO, RO). A first signal and a third signal are added in order to obtain a first output signal (L0w), wherein the first signal (L0wL) comprises the first stereo signal (LO) modified by a first complex function (g1), and the third signal (L0wR) comprises the second stereo signal (RO) modified by a third complex function (g3). A second signal and a fourth signal are added to obtain a second output signal (R0w). The fourth signal (R0wR) comprises the second stereo signal (RO) modified by a fourth complex function (g4), and the second signal (R0wL) comprises the first stereo signal (LO) modified by a second complex function (g2).
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: March 27, 2012
    Assignees: Koninklijke Philips Electronics N.V., Coding Technologies AB
    Inventors: Machiel Willem Van Loon, Dirk Jeroen Breebaart, Gerard Herman Hotho, Erik Gosuinus Petrus Schuijers, Heiko Purnhagen, Karl Jonas Roeden
  • Publication number: 20110091045
    Abstract: An audio encoder (109) has a hierarchical encoding structure and generates a data stream comprising one or more audio channels as well as parametric audio encoding data. The encoder (109) comprises an encoding structure processor (305) which inserts decoder tree structure data into the data stream. The decoder tree structure data comprises at least one data value indicative of a channel split characteristic for an audio channel at a hierarchical layer of the hierarchical decoder structure and may specifically specify the decoder tree structures to be applied by a decoder. A decoder (115) comprises a receiver (401) which receives the data stream and a decoder structure processor (405) for generating the hierarchical decoder structure in response to the decoder tree structure data. A decode processor (403) then generates output audio channels from the data stream using the hierarchical decoder structure.
    Type: Application
    Filed: September 15, 2010
    Publication date: April 21, 2011
    Inventors: Erik Gosuinus Petrus Schuijers, Gerard Herman Hotho, Heiko Purnhagen, Wolfgang Alexander Schildbach, Holger Horich, Hans Magnus Kristofer Kjoerling, Karl Jonas Roeden
  • Publication number: 20110058679
    Abstract: A method and a device are described for processing a stereo signal obtained from an encoder, which encodes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (L0, R0). A first signal and a third signal are added in order to obtain a first output signal (Low), wherein the first signal (L0wL) comprises the first stereo signal (L0) modified by a first complex function (g1), and the third signal (L0wR) comprises the second stereo signal (R0) modified by a third complex function (g3). A second signal and a fourth signal are added to obtain a second output signal (R0w). The fourth signal (R0wR) comprises the second stereo signal (R0) modified by a fourth complex function (g4), and the second signal (R0wL) comprises the first stereo signal (L0) modified by a second complex function (g2).
    Type: Application
    Filed: September 15, 2010
    Publication date: March 10, 2011
    Inventors: Machiel Willem Van Loon, Dirk Jeroen Breebaart, Gerard Herman Hotho, Erik Gosuinus Petrus Schuijers, Heiko Purnhagen, Karl Jonas Roeden