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: 11838743
    Abstract: An apparatus for generating a sound field description from an input signal having one or more channels including: an input signal analyzer for obtaining diffuseness data from the input signal; a sound component generator for generating, from the input signal, one or more sound field components of a first group of sound field components having for each sound field component a direct component and a diffuse component, and for generating, from the input signal, a second group of sound field components having only a direct component, the sound component generator being configured to perform an energy compensation when generating the first group of sound field components, the energy compensation depending on the diffuseness data and a number of sound field components in the second group, a number of diffuse components in the first group, or a maximum order of sound field components.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: December 5, 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: 20230379652
    Abstract: An apparatus generating a sound field description includes an input signal analyzer acquiring diffuseness data from the input signal; a sound component generator for generating, from the input signal, one or more sound field components of a first group of sound field components comprising for each sound field component a direct component and a diffuse component, and for generating, from the input signal, a second group of sound field components comprising only a direct component. The sound component generator is configured to perform an energy compensation when generating the first group of sound field components, the energy compensation depending on the diffuseness data and at least one of a number of sound field components in the second group, a number of diffuse components in the first group, a maximum order of sound field components of the first group and a maximum order of sound field components of the second group.
    Type: Application
    Filed: August 2, 2023
    Publication date: November 23, 2023
    Inventors: Guillaume FUCHS, Oliver THIERGART, Srikanth KORSE, Stefan DÖHLA, Markus MULTRUS, Fabian KÜCH, Alexandre BOUTHÉON, Andrea EICHENSEER, Stefan BAYER
  • Patent number: 11783843
    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: May 11, 2020
    Date of Patent: October 10, 2023
    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: 11729554
    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 15, 2023
    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
  • Publication number: 20230238006
    Abstract: An apparatus for processing an encoded audio scene representing a sound field related to a virtual listener position, the encoded audio scene including information on a transport signal and a first set of parameters related to the virtual listener position includes a parameter converter for converting the first set of parameters into a second set of parameters related to a channel representation including two or more channels for a reproduction at predefined spatial positions for the two or more channels, and an output interface for generating a processed audio scene using the second set of parameters and the information on the transport signal.
    Type: Application
    Filed: April 3, 2023
    Publication date: July 27, 2023
    Inventors: Franz REUTELHUBER, Guillaume FUCHS, Markus MULTRUS, Eleni FOTOPOULOU, Stefan BAYER, Jan BÜTHE, Stefan DÖHLA
  • Publication number: 20230238005
    Abstract: Apparatus for processing an audio scene representing a sound field, the audio scene having information on a transport signal and a first set of parameters. The apparatus has a parameter processor for processing the first set of parameters to obtain a second set of parameters, wherein the parameter processor is configured to calculate at least one raw parameter for each output time frame using at least one parameter of the first set of parameters for the input time frame, to calculate a smoothing information such as a factor for each raw parameter in accordance with a smoothing rule, and to apply a corresponding smoothing information to the corresponding raw parameter to derive the parameter of the second set of parameters for the output time frame. The apparatus further has an output interface for generating a processed audio scene using the second set of parameters and the information on the transport signal.
    Type: Application
    Filed: April 3, 2023
    Publication date: July 27, 2023
    Inventors: Franz REUTELHUBER, Guillaume FUCHS, Markus MULTRUS, Eleni FOTOPOULOU, Stefan BAYER, Jan BÜTHE, Stefan DÖHLA
  • Publication number: 20230239644
    Abstract: Apparatus for processing an audio scene representing a sound field, the audio scene comprising information on a transport signal and a set of parameters. The apparatus comprising an output interface for generating a processed audio scene using the set of parameters and the information on the transport signal, wherein the output interface is configured to generate a raw representation of two or more channels using the set of parameters and the transport signal and a multichannel enhancer for generating an enhancement representation of the two or more channels using the transport signal, and a signal combiner for combining the raw representation of the two or more channels and the enhancement representation of the two or more channels to obtain the processed audio scene.
    Type: Application
    Filed: March 31, 2023
    Publication date: July 27, 2023
    Inventors: Franz REUTELHUBER, Guillaume FUCHS, Markus MULTRUS, Eleni FOTOPOULOU, Stefan BAYER, Jan BÜTHE, Stefan DÖHLA
  • Publication number: 20230197090
    Abstract: An audio quantizer for quantizing a plurality of audio information items has: a first stage vector quantizer for quantizing the plurality of audio information items to determine a first stage vector quantization result and a plurality of intermediate quantized items corresponding to the first stage vector quantization result; a residual item determiner for calculating a plurality of residual items from the plurality of intermediate quantized items and the plurality of audio information items; and a second stage vector quantizer for quantizing the plurality of residual items to obtain a second stage vector quantization result, wherein the first stage vector quantization result and the second stage vector quantization result are a quantized representation of the plurality of audio information items.
    Type: Application
    Filed: January 5, 2023
    Publication date: June 22, 2023
    Inventors: Emmanuel RAVELLI, Goran MARKOVIC, Jan Frederik KIENE, Franz REUTELHUBER, Stefan DÖHLA, Eleni FOTOPOULOU
  • Publication number: 20230169985
    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: Application
    Filed: January 26, 2023
    Publication date: June 1, 2023
    Inventors: Eleni FOTOPOULOU, Jan BÜTHE, Emmanuel RAVELLI, Pallavi MABEN, Martin DIETZ, Franz REUTELHUBER, Stefan DÖHLA, Srikanth KORSE
  • Publication number: 20230133513
    Abstract: Audio decoder for decoding an encoded audio signal having multi-channel audio data having data for two or more audio channels, and information on jointly encoded scale parameters, having: a scale parameter decoder for decoding the information on the jointly encoded scale parameters to obtain a first and a second set of scale parameters for a first channel and a second channel, respectively, of a decoded audio signal; and a signal processor for applying the first and second sets of scale parameters to a first and second channel representation, respectively, derived from the multi-channel audio data to obtain the first and second channels of the decoded audio signal, wherein the jointly encoded scale parameters have information on a first group and on a second group of jointly encoded scale parameters, and wherein the scale parameter decoder is configured to combine a jointly encoded scale parameter of the first group and one of the second group using a first and a second combination rule, respectively, to obta
    Type: Application
    Filed: December 21, 2022
    Publication date: May 4, 2023
    Inventors: Emmanuel RAVELLI, Goran MARKOVIC, Jan Frederik KIENE, Franz REUTELHUBER, Stefan DÖHLA, Eleni FOTOPOULOU
  • Patent number: 11594231
    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: September 29, 2020
    Date of Patent: February 28, 2023
    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: 11368790
    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: March 17, 2020
    Date of Patent: June 21, 2022
    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: 11367454
    Abstract: An apparatus for encoding directional audio coding parameters having diffuseness parameters and direction parameters, has: a parameter quantizer for quantizing the diffuseness parameters and the direction parameters; a parameter encoder for encoding quantized diffuseness parameters and quantized direction parameters; and an output interface for generating an encoded parameter representation having information on encoded diffuseness parameters and encoded direction parameters.
    Type: Grant
    Filed: May 6, 2020
    Date of Patent: June 21, 2022
    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: 11343634
    Abstract: An apparatus and method for rendering an audio signal for a playback to a user is disclosed. In one example, the apparatus is configured to determine information about an orientation of a head of the user using an optical sensor. The apparatus is configured to determine information about an orientation of the optical sensor using an orientation sensor which is arranged in a predetermined positional relationship with respect to the optical sensor. The apparatus is configured to consider the information about the orientation of the optical sensor when determining the information about the orientation of the head. The apparatus is configured to perform a spatial rendering of an audio signal in dependence on the information about the orientation of the head of the user.
    Type: Grant
    Filed: October 22, 2020
    Date of Patent: May 24, 2022
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Dominik Häussler, Frederick Melville, Dennis Rosenberger, Stefan Döhla
  • Publication number: 20220150635
    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: Application
    Filed: January 26, 2022
    Publication date: May 12, 2022
    Inventors: Guillaume FUCHS, Jürgen HERRE, Fabian KÜCH, Stefan DÖHLA, Markus MULTRUS, Oliver THIERGART, Oliver WÜBBOLT, Florin GHIDO, Stefan BAYER, Wolfgang JAEGERS
  • Publication number: 20220150633
    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: Application
    Filed: January 26, 2022
    Publication date: May 12, 2022
    Inventors: Guillaume FUCHS, Jürgen HERRE, Fabian KÜCH, Stefan DÖHLA, Markus MULTRUS, Oliver THIERGART, Oliver WÜBBOLT, Florin GHIDO, Stefan BAYER, Wolfgang JAEGERS
  • Publication number: 20220130404
    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: January 10, 2022
    Publication date: April 28, 2022
    Inventors: Guillaume FUCHS, Jürgen HERRE, Fabian KÜCH, Stefan DÖHLA, Markus MULTRUS, Oliver THIERGART, Oliver WÜBBOLT, Florin GHIDO, Stefan BAYER, Wolfgang JAEGERS
  • Publication number: 20220108705
    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: December 2, 2021
    Publication date: April 7, 2022
    Inventors: Guillaume FUCHS, Markus MULTRUS, Stefan DÖHLA, Andrea EICHENSEER
  • Publication number: 20220101868
    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: December 10, 2021
    Publication date: March 31, 2022
    Inventors: Jan BÜTHE, Markus SCHNELL, Stefan DÖHLA, Bernhard GRILL, Martin DIETZ
  • Publication number: 20220101866
    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: December 9, 2021
    Publication date: March 31, 2022
    Inventors: Jan BÜTHE, Markus SCHNELL, Stefan DÖHLA, Bernhard GRILL, Martin DIETZ