Patents by Inventor Karsten Linzmeier

Karsten Linzmeier 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: 11195536
    Abstract: The present document describes a method for allocating bits to a frame of a sequence of frames to yield a bitstream having a constant average bitrate, wherein the frame comprises audio data and metadata. The method comprises maintaining an overall bit reservoir and maintaining a virtual bit reservoir being a subset of the overall bit reservoir, such that bits for the metadata of the frame are allocated from the virtual bit reservoir and such that bits for the audio data of the frame are allocated from the overall bit reservoir.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: December 7, 2021
    Assignee: Dolby International AB
    Inventors: Michael Schug, Holger Hoerich, Tobias R. Wagenblass, Christof Fersch, Karsten Linzmeier
  • Publication number: 20210249022
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.
    Type: Application
    Filed: February 17, 2021
    Publication date: August 12, 2021
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Tobias FRIEDRICH, Alexander MUELLER, Karsten LINZMEIER, Claus-Christian SPENGER, Tobias R. WAGENBLASS
  • Patent number: 10930291
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: February 23, 2021
    Assignee: Dolby International AB
    Inventors: Tobias Friedrich, Alexander Mueller, Karsten Linzmeier, Claus-Christian Spenger, Tobias R. Wagenblass
  • Publication number: 20210005211
    Abstract: A technique including receiving and decoding a coded bitstream encoded with audio content including first audio objects corresponding to a first media content type of two consecutive media content types and second audio objects corresponding to a second media content type of the two consecutive media content types, and audio metadata corresponding to the audio content. The audio metadata including first and second audio object gains, for the first and second audio objects, generated in part based on a first fading curve of the first media content type and a second fading curve of the second media content type, respectively. The technique further includes applying the first and second audio object gains to the first and second audio objects, and rendering a sound field represented by the first audio object with the applied first audio object gain and the second audio object with the applied second audio object gain.
    Type: Application
    Filed: July 1, 2020
    Publication date: January 7, 2021
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Alexander Stahlmann, Reinhold Boehm, Mark C. Leddy, Karsten Linzmeier, Vinay Mathew, Simon Plain, Heiko Purnhagen, Leif Sehlström, Robin Thesing
  • Publication number: 20200321011
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.
    Type: Application
    Filed: May 1, 2020
    Publication date: October 8, 2020
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Tobias FRIEDRICH, Alexander MUELLER, Karsten LINZMEIER, Claus-Christian SPENGER, Tobias R. WAGENBLASS
  • Publication number: 20200194011
    Abstract: The present document describes a method for allocating bits to a frame of a sequence of frames to yield a bitstream having a constant average bitrate, wherein the frame comprises audio data and metadata. The method comprises maintaining an overall bit reservoir and maintaining a virtual bit reservoir being a subset of the overall bit reservoir, such that bits for the metadata of the frame are allocated from the virtual bit reservoir and such that bits for the audio data of the frame are allocated from the overall bit reservoir.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Michael SCHUG, Holger HOERICH, Tobias R. WAGENBLASS, Christof FERSCH, Karsten LINZMEIER
  • Patent number: 10643626
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: May 5, 2020
    Assignee: Dolby International AB
    Inventors: Tobias Friedrich, Alexander Mueller, Karsten Linzmeier, Claus-Christian Spenger, Tobias R. Wagenblass
  • Patent number: 10573324
    Abstract: The present document describes a method (800) for allocating bits to a frame (301) of a sequence of frames (301) to yield a bitstream having a constant average bitrate, wherein the frame (301) comprises audio data and metadata. The method (800) comprises maintaining (801) an overall bit reservoir (100) and maintaining (802) a virtual bit reservoir (510) being a subset of the overall bit reservoir (100), such that bits for the metadata of the frame (301) are allocated from the virtual bit reservoir (510) and such that bits for the audio data of the frame (301) are allocated from the overall bit reservoir (100).
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: February 25, 2020
    Assignee: Dolby International AB
    Inventors: Michael Schug, Holger Hoerich, Tobias R. Wagenblass, Christof Fersch, Karsten Linzmeier
  • Publication number: 20190348052
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.
    Type: Application
    Filed: June 10, 2019
    Publication date: November 14, 2019
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: TOBIAS FRIEDRICH, ALEXANDER MUELLER, KARSTEN LINZMEIER, CLAUS-CHRISTIAN SPENGER, TOBIAS R. WAGENBLASS
  • Patent number: 10360919
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: July 23, 2019
    Assignee: Dolby International AB
    Inventors: Tobias Friedrich, Alexander Mueller, Karsten Linzmeier, Claus-Christian Spenger, Tobias Wagenblass
  • Publication number: 20190080700
    Abstract: The present document describes a method (800) for allocating bits to a frame (301) of a sequence of frames (301) to yield a bitstream having a constant average bitrate, wherein the frame (301) comprises audio data and metadata. The method (800) comprises maintaining (801) an overall bit reservoir (100) and maintaining (802) a virtual bit reservoir (510) being a subset of the overall bit reservoir (100), such that bits for the metadata of the frame (301) are allocated from the virtual bit reservoir (510) and such that bits for the audio data of the frame (301) are allocated from the overall bit reservoir (100).
    Type: Application
    Filed: February 1, 2017
    Publication date: March 14, 2019
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Michael SCHUG, Holger HOERICH, Tobias R. WAGENBLASS, Christof FERSCH, Karsten LINZMEIER
  • Patent number: 9990935
    Abstract: The present document relates to the design of anti-aliasing and/or anti-imaging filters for resamplers using rational resampling factors. In particular, the present document relates to a method for implementing such anti-aliasing and/or anti-imaging filters with reduced computational complexity. In addition, the present document relates to further aspects of an audio encoding and decoding system, such as the phase relation between the channels of a multi-channel audio signal and/or the structure of the bitstream of an encoded audio signal.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: June 5, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Alexander Groeschel, Jens Popp, Martin Wolters, Jeffrey Riedmiller, Michael Ward, Karl Jonas Roeden, Holger Hoerich, Karsten Linzmeier, Tobias Friedrich
  • Publication number: 20170309280
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.
    Type: Application
    Filed: July 11, 2017
    Publication date: October 26, 2017
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Tobias FRIEDRICH, Alexander MUELLER, Karsten LINZMEIER, Claus-Christian SPENGER, Tobias WAGENBLASS
  • Patent number: 9715880
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system (500) configured to generate a bitstream (564) indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system (500) comprises a downmix processing unit (510) configured to generate the downmix signal from a multi-channel input signal (561); wherein the downmix signal comprises m channels and wherein the multi-channel input signal (561) comprises n channels; n, m being integers with m<n. Furthermore, the system (500) comprises a parameter processing unit (520) configured to determine the spatial metadata from the multi-channel input signal (561).
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: July 25, 2017
    Assignee: Dolby International AB
    Inventors: Tobias Friedrich, Alexander Mueller, Karsten Linzmeier, Claus-Christian Spenger, Tobias R. Wagenblass
  • Patent number: 9460723
    Abstract: A decoding system reconstructs an audio signal based on an input signal representing the audio signal by parametric coding or by n discretely coded channels. Parametric decoding proceeds on the basis of a core signal and mixing parameters controlling a spatial synthesis stage, which is supplied with a downmix signal. A controller is responsible for controlling the components of the decoding system, whether in steady-state parametric mode, steady-state discrete decoding mode and transitions between these. In defective frames of the input signal, which do not allow the mixing parameters to be decoded, the controller is configured to perform various error handling procedures including: parametric decoding using previous values of the mixing parameters; continuing parametric decoding for a limited duration, and/or outputting the core signal without spatial synthesis.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: October 4, 2016
    Assignee: Dolby International AB
    Inventors: Tobias Friedrich, Tobias Ro Wagenblass, Karsten Linzmeier, Daniel Homm, Claus-Christian Spenger, Heiko Purnhagen
  • Publication number: 20160196831
    Abstract: The present document relates to the design of anti-aliasing and/or anti-imaging filters for resamplers using rational resampling factors. In particular, the present document relates to a method for implementing such anti-aliasing and/or anti-imaging filters with reduced computational complexity. In addition, the present document relates to further aspects of an audio encoding and decoding system, such as the phase relation between the channels of a multi-channel audio signal and/or the structure of the bitstream of an encoded audio signal.
    Type: Application
    Filed: September 10, 2014
    Publication date: July 7, 2016
    Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL AB
    Inventors: Alexander GROESCHEL, Jenns POPP, Martin WOLTERS, Jeffrey RIEDMILLER, Michael WARD, Karl Jonas ROEDEN, Holger HOERICH, Karsten LINZMEIER, Tobias FRIEDRICH
  • Publication number: 20160005407
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system (500) configured to generate a bitstream (564) indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system (500) comprises a downmix processing unit (510) configured to generate the downmix signal from a multi-channel input signal (561); wherein the downmix signal comprises m channels and wherein the multi-channel input signal (561) comprises n channels; n, m being integers with m<n. Furthermore, the system (500) comprises a parameter processing unit (520) configured to determine the spatial metadata from the multi-channel input signal (561).
    Type: Application
    Filed: February 21, 2014
    Publication date: January 7, 2016
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Tobias FRIEDRICH, Alexander MUELLER, Karsten LINZMEIER, Claus-Christian SPENGER, Tobias R. WAGENBLASS
  • Patent number: 9043200
    Abstract: The present invention is based on the finding that parameters including: a first set of parameters of a representation of a first portion of an original signal and a second set of parameters of a representation of a second portion of the original signal can be efficiently encoded when the parameters are arranged in a first sequence of tuples and a second sequence of tuples. The first sequence of tuples includes tuples of parameters having two parameters from a single portion of the original signal and the second sequence of tuples includes tuples of parameters having one parameter from the first portion and one parameter from the second portion of the original signal. A bit estimator estimates the number of necessary bits to encode the first and the second sequence of tuples. Only the sequence of tuples, which results in the lower number of bits, is encoded.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: May 26, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Ralph Sperschneider, Jürgen Herre, Karsten Linzmeier, Johannes Hilpert
  • Publication number: 20150142451
    Abstract: A decoding system reconstructs an audio signal based on an input signal representing the audio signal by parametric coding or by n discretely coded channels. Parametric decoding proceeds on the basis of a core signal and mixing parameters controlling a spatial synthesis stage, which is supplied with a downmix signal. A controller is responsible for controlling the components of the decoding system, whether in steady-state parametric mode, steady-state discrete decoding mode and transitions between these. In defective frames of the input signal, which do not allow the mixing parameters to be decoded, the controller is configured to perform various error handling procedures including: parametric decoding using previous values of the mixing parameters; continuing parametric decoding for a limited duration, and/or outputting the core signal without spatial synthesis.
    Type: Application
    Filed: June 14, 2013
    Publication date: May 21, 2015
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Tobias Friedrich, Tobias Ro Wagenblass, Karsten Linzmeier, Daniel Homm, Claus-Christian Spenger, Heiko Purnhagen
  • Patent number: 8687829
    Abstract: A parameter transformer generates level parameters, indicating an energy relation between a first and a second audio channel of a multi-channel audio signal associated to a multi-channel loudspeaker configuration. The level parameter are generated based on object parameters for a plurality of audio objects associated to a down-mix channel, which is generated using object audio signals associated to the audio objects. The object parameters have an energy parameter indicating an energy of the object audio signal. To derive the coherence and the level parameters, a parameter generator is used, which combines the energy parameter and object rendering parameters, which depend on a desired rendering configuration.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: April 1, 2014
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V., Dolby Sweden AB, Koninklijke Philips Electronics N.V.
    Inventors: Johannes Hilpert, Karsten Linzmeier, Juergen Herre, Ralph Sperschneider, Andreas Hoelzer, Lars Villemoes, Jonas Engdegard, Heiko Purnhagen, Kristofer Kjoerling, Dirk Jeroen Breebaart, Werner Oomen