Patents by Inventor Stefan DÖHLA

Stefan DÖHLA 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: 12198705
    Abstract: An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel signal, includes a signal analyzer for estimating a signal characteristic of the first channel signal or the second channel signal or both signals or a signal derived from the first channel signal or the second channel signal; a calculator for calculating a cross-correlation spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a weighter for weighting a smoothed or non-smoothed cross-correlation spectrum to obtain a weighted cross correlation spectrum using a first weighting procedure or using a second weighting procedure depending on a signal characteristic estimated by the signal analyzer, wherein the first weighting procedure is different from the second weighting procedure; and a processor for processing the weighted cross-correlation spectrum to obtain the inter-channel time difference.
    Type: Grant
    Filed: January 26, 2023
    Date of Patent: January 14, 2025
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Eleni Fotopoulou, Jan Büthe, Emmanuel Ravelli, Pallavi Maben, Martin Dietz, Franz Reutelhuber, Stefan Döhla, Srikanth Korse
  • Patent number: 12198709
    Abstract: An apparatus for encoding a spatial audio representation representing an audio scene to obtain an encoded audio signal includes: a transport representation generator for generating a transport representation from the spatial audio representation, and for generating transport metadata related to the generation of the transport representation or indicating one or more directional properties of the transport representation; and an output interface for generating the encoded audio signal, the encoded audio signal including information on the transport representation, and information on the transport metadata.
    Type: Grant
    Filed: July 14, 2021
    Date of Patent: January 14, 2025
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Fabian Küch, Oliver Thiergart, Guillaume Fuchs, Stefan Döhla, Alexandre Bouthéon, Jürgen Herre, Stefan Bayer
  • Publication number: 20240428806
    Abstract: An apparatus for encoding directional audio coding parameters including diffuseness parameters and direction parameters includes: a parameter calculator for calculating the diffuseness parameters with a first time or frequency resolution and for calculating the direction parameters with a second time or frequency resolution; and a quantizer and encoder processor for generating a quantized and encoded representation of the diffuseness parameters and the direction parameters.
    Type: Application
    Filed: September 3, 2024
    Publication date: December 26, 2024
    Inventors: Guillaume FUCHS, Jürgen HERRE, Fabian KÜCH, Stefan DÖHLA, Markus MULTRUS, Oliver THIERGART, Oliver WÜBBOLT, Florin GHIDO, Stefan BAYER, Wolfgang JAEGERS
  • Patent number: 12175991
    Abstract: An audio encoder for encoding audio input data has: a preprocessor for preprocessing the audio input data to obtain audio data to be coded; a coder processor for coding the audio data to be coded; and a controller for controlling the coder processor so that, depending on a first signal characteristic of a first frame of the audio data to be coded, a number of audio data items of the audio data to be coded by the coder processor for the first frame is reduced compared to a second signal characteristic of a second frame, and a first number of information units used for coding the reduced number of audio data items for the first frame is stronger enhanced compared to a second number of information units for the second frame.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: December 24, 2024
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Jan Büthe, Markus Schnell, Stefan Döhla, Bernhard Grill, Martin Dietz
  • Publication number: 20240406391
    Abstract: An apparatus for generating a sound field description using an input signal having a mono-signal or a multi-channel signal includes: an input signal analyzer for analyzing the input signal to derive direction data and diffuseness data; a low-order components generator for generating a low-order sound field description from the input signal up to a predetermined order and mode; a mid-order components generator for generating a mid-order sound field description above the predetermined order or at the predetermined order and above the predetermined mode and below or at a high order, wherein the mid-order sound field description comprises a direct contribution and a diffuse contribution; and a high-order components generator for generating a high-order sound field description comprising a sound field component above the high order using a synthesis of at least one direct portion, wherein the high-order sound field description comprises a direct contribution only.
    Type: Application
    Filed: August 13, 2024
    Publication date: December 5, 2024
    Inventors: Guillaume FUCHS, Oliver THIERGART, Srikanth KORSE, Stefan DÖHLA, Markus MULTRUS, Fabian KÜCH, Alexandre BOUTHÉON, Andrea EICHENSEER, Stefan BAYER
  • Patent number: 12159641
    Abstract: An audio encoder for encoding audio input data has: a preprocessor for preprocessing the audio input data to obtain audio data to be coded; a coder processor for coding the audio data to be coded; and a controller for controlling the coder processor so that, depending on a first signal characteristic of a first frame of the audio data to be coded, a number of audio data items of the audio data to be coded by the coder processor for the first frame is reduced compared to a second signal characteristic of a second frame, and a first number of information units used for coding the reduced number of audio data items for the first frame is stronger enhanced compared to a second number of information units for the second frame.
    Type: Grant
    Filed: December 10, 2021
    Date of Patent: December 3, 2024
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Jan Büthe, Markus Schnell, Stefan Döhla, Bernhard Grill, Martin Dietz
  • Publication number: 20240395263
    Abstract: An apparatus for transforming an audio stream with more than one channel into another representation having: a transformer for transforming the audio stream in a signal-adaptive way dependent on one or more parameters; and a unit for deriving (the one or more parameters describing an acoustic or psychoacoustic model of the audio stream, said parameters comprise at least an information on DOA, wherein the one or more parameters are derived from the audio stream.
    Type: Application
    Filed: August 2, 2024
    Publication date: November 28, 2024
    Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Dominik WECKBECKER, Archit TAMARAPU, Guillaume FUCHS, Markus MULTRUS, Stefan DÖHLA, Kacper SAGNOWSKI, Stefan BAYER
  • Publication number: 20240379114
    Abstract: What is described is a method for loss concealment of spatial audio parameters, the spatial audio parameters having at least a direction of arrival information; the method having the following steps: receiving a first set of spatial audio parameters having at least a first direction of arrival information; receiving a second set of spatial audio parameters, having at least a second direction of arrival information; and replacing the second direction of arrival information of a second set by a replacement direction of arrival information derived from the first direction of arrival information, if at least the second direction of arrival information or a portion of the second direction of arrival information is lost or damaged.
    Type: Application
    Filed: July 19, 2024
    Publication date: November 14, 2024
    Inventors: Guillaume FUCHS, Markus MULTRUS, Stefan DÖHLA, Andrea EICHENSEER
  • Patent number: 12112762
    Abstract: An apparatus for encoding directional audio coding parameters including diffuseness parameters and direction parameters includes: a parameter calculator for calculating the diffuseness parameters with a first time or frequency resolution and for calculating the direction parameters with a second time or frequency resolution; and a quantizer and encoder processor for generating a quantized and encoded representation of the diffuseness parameters and the direction parameters.
    Type: Grant
    Filed: August 28, 2023
    Date of Patent: October 8, 2024
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Guillaume Fuchs, Jürgen Herre, Fabian Küch, Stefan Döhla, Markus Multrus, Oliver Thiergart, Oliver Wübbolt, Florin Ghido, Stefan Bayer, Wolfgang Jaegers
  • Patent number: 12106763
    Abstract: An apparatus for encoding directional audio coding parameters comprising diffuseness parameters and direction parameters having a parameter calculator (100) for calculating the diffuseness parameters with a first time or frequency resolution and for calculating the direction parameters with a second time or frequency resolution; and a quantizer and encoder processor (200) for generating a quantized and encoded representation of the diffuseness parameters and the direction parameters.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: October 1, 2024
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Guillaume Fuchs, Jürgen Herre, Fabian Küch, Stefan Döhla, Markus Multrus, Oliver Thiergart, Oliver Wübbolt, Florin Ghido, Stefan Bayer, Wolfgang Jaegers
  • Patent number: 12067991
    Abstract: What is described is a method for loss concealment of spatial audio parameters, the spatial audio parameters having at least a direction of arrival information; the method having the following steps: receiving a first set of spatial audio parameters having at least a first direction of arrival information; receiving a second set of spatial audio parameters, having at least a second direction of arrival information; and replacing the second direction of arrival information of a second set by a replacement direction of arrival information derived from the first direction of arrival information, if at least the second direction of arrival information or a portion of the second direction of arrival information is lost or damaged.
    Type: Grant
    Filed: December 2, 2021
    Date of Patent: August 20, 2024
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
    Inventors: Guillaume Fuchs, Markus Multrus, Stefan Döhla, Andrea Eichenseer
  • Publication number: 20240274139
    Abstract: An apparatus for encoding directional audio coding parameters comprising diffuseness parameters and direction parameters having a parameter calculator (100) for calculating the diffuseness parameters with a first time or frequency resolution and for calculating the direction parameters with a second time or frequency resolution; and a quantizer and encoder processor (200) for generating a quantized and encoded representation of the diffuseness parameters and the direction parameters.
    Type: Application
    Filed: April 24, 2024
    Publication date: August 15, 2024
    Inventors: Guillaume FUCHS, Jürgen HERRE, Fabian KÜCH, Stefan DÖHLA, Markus MULTRUS, Oliver THIERGART, Oliver WÜBBOLT, Florin GHIDO, Stefan BAYER, Wolfgang JAEGERS
  • Patent number: 12058501
    Abstract: An apparatus for generating a description of a combined audio scene, includes: an input interface for receiving a first description of a first scene in a first format and a second description of a second scene in a second format, wherein the second format is different from the first format; a format converter for converting the first description into a common format and for converting the second description into the common format, when the second format is different from the common format; and a format combiner for combining the first description in the common format and the second description in the common format to obtain the combined audio scene.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: August 6, 2024
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Guillaume Fuchs, Jürgen Herre, Fabian Küch, Stefan Döhla, Markus Multrus, Oliver Thiergart, Oliver Wübbolt, Florin Ghido, Stefan Bayer, Wolfgang Jaegers
  • Patent number: 12033647
    Abstract: An audio encoder for encoding audio input data has: a preprocessor for preprocessing the audio input data to obtain audio data to be coded; a coder processor for coding the audio data to be coded; and a controller for controlling the coder processor so that, depending on a first signal characteristic of a first frame of the audio data to be coded, a number of audio data items of the audio data to be coded by the coder processor for the first frame is reduced compared to a second signal characteristic of a second frame, and a first number of information units used for coding the reduced number of audio data items for the first frame is stronger enhanced compared to a second number of information units for the second frame.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: July 9, 2024
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Jan Büthe, Markus Schnell, Stefan Döhla, Bernhard Grill, Martin Dietz
  • Publication number: 20240185873
    Abstract: An audio encoder for encoding audio input data has: a preprocessor for preprocessing the audio input data to obtain audio data to be coded; a coder processor for coding the audio data to be coded; and a controller for controlling the coder processor so that, depending on a first signal characteristic of a first frame of the audio data to be coded, a number of audio data items of the audio data to be coded by the coder processor for the first frame is reduced compared to a second signal characteristic of a second frame, and a first number of information units used for coding the reduced number of audio data items for the first frame is stronger enhanced compared to a second number of information units for the second frame.
    Type: Application
    Filed: February 15, 2024
    Publication date: June 6, 2024
    Inventors: Jan BÜTHE, Markus SCHNELL, Stefan DÖHLA, Bernhard GRILL, Martin DIETZ
  • Patent number: 11937075
    Abstract: An apparatus for generating a sound field description using an input signal having a mono-signal or a multi-channel signal comprises: an input signal analyzer for analyzing the input signal to derive direction data and diffuseness data; a low-order components generator for generating a low-order sound field description from the input signal up to a predetermined order and mode; a mid-order components generator for generating a mid-order sound field description above the predetermined order or at the predetermined order and above the predetermined mode and below or at a first truncation order using a synthesis of at least one direct portion and of at least one diffuse portion using the direction data and the diffuseness data; and a high-order components generator for generating a high-order sound field description having a component above the first truncation order using a synthesis of at least one direct portion.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: March 19, 2024
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWAND FORSCHUNG E.V
    Inventors: Guillaume Fuchs, Oliver Thiergart, Srikanth Korse, Stefan Döhla, Markus Multrus, Fabian Küch, Alexandre Bouthéon, Andrea Eichenseer, Stefan Bayer
  • Publication number: 20240040330
    Abstract: An apparatus for generating a sound field description using an input signal having a mono-signal or a multi-channel signal includes: an input signal analyzer for analyzing the input signal to derive direction data and diffuseness data; a low-order components generator for generating a low-order sound field description from the input signal up to a predetermined order and mode; a mid-order components generator for generating a mid-order sound field description above the predetermined order or at the predetermined order and above the predetermined mode and below or at a first truncation order using a synthesis of at least one direct portion and of at least one diffuse portion using the direction data and the diffuseness data; and a high-order components generator for generating a high-order sound field description having a component above the first truncation order using a synthesis of at least one direct portion.
    Type: Application
    Filed: October 6, 2023
    Publication date: February 1, 2024
    Inventors: Guillaume FUCHS, Oliver THIERGART, Srikanth KORSE, Stefan DÖHLA, Markus MULTRUS, Fabian KÜCH, Alexandre BOUTHÉON, Andrea EICHENSEER, Stefan BAYER
  • Patent number: 11856389
    Abstract: An apparatus for generating a sound field description from an input signal having at least two channels has: an input signal analyzer for obtaining direction data and diffuseness data from the input signal; an estimator for estimating a first energy- or amplitude-related measure for an omnidirectional component derived from the input signal and for estimating a second energy- or amplitude-related measure for a directional component derived from the input signal, and a sound component generator for generating sound field components of the sound field, wherein the sound component generator is configured to perform an energy compensation of the directional component using the first energy- or amplitude-related measure, the second energy- or amplitude-related measure, the direction data and the diffuseness data.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: December 26, 2023
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Guillaume Fuchs, Oliver Thiergart, Srikanth Korse, Stefan Döhla, Markus Multrus, Fabian Küch, Alexandre Bouthéon, Andrea Eichenseer, Stefan Bayer
  • Publication number: 20230410819
    Abstract: An apparatus for encoding directional audio coding parameters including diffuseness parameters and direction parameters includes: a parameter calculator for calculating the diffuseness parameters with a first time or frequency resolution and for calculating the direction parameters with a second time or frequency resolution; and a quantizer and encoder processor for generating a quantized and encoded representation of the diffuseness parameters and the direction parameters.
    Type: Application
    Filed: August 28, 2023
    Publication date: December 21, 2023
    Inventors: Guillaume FUCHS, Jürgen HERRE, Fabian KÜCH, Stefan DÖHLA, Markus MULTRUS, Oliver THIERGART, Oliver WÜBBOLT, Florin GHIDO, Stefan BAYER, Wolfgang JAEGERS
  • Publication number: 20230396949
    Abstract: An apparatus for generating a sound field description from an input signal having at least two channels has: an input signal analyzer for obtaining direction data and diffuseness data from the input signal; an estimator for estimating a first energy- or amplitude-related measure for an omnidirectional component derived from the input signal and for estimating a second energy- or amplitude-related measure for a directional component derived from the input signal, and a sound component generator for generating sound field components of the sound field, wherein the sound component generator is configured to perform an energy compensation of the directional component using the first energy- or amplitude-related measure, the second energy- or amplitude-related measure, the direction data and the diffuseness data.
    Type: Application
    Filed: August 10, 2023
    Publication date: December 7, 2023
    Inventors: Guillaume FUCHS, Oliver THIERGART, Srikanth KORSE, Stefan DÖHLA, Markus MULTRUS, Fabian KÜCH, Alexandre BOUTHÉON, Andrea EICHENSEER, Stefan BAYER