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US 11,388,512 B2Granted
Positioning sound sources
AssigneeNomono AS
InventorAudun Solvang
Life of this patent
Estimating the term…
Abstract
A method of determining a position of a sound source is provided which comprises generating a spatially encoded sound-field signal using a sound-field microphone system comprising at least two microphones, wherein the spatially encoded sound-field signal comprises a plurality of components, each component including sound from the sound source. The method further comprises generating a local microphone signal corresponding to sound from the sound source using a local microphone positioned close to the sound source, comparing the local microphone signal with each of the plurality of components to generate a plurality of comparison results and using the plurality of comparison results to determine the position of the sound source relative to the sound-field microphone system.
Claims20
A method of determining a position of a sound source, comprising:
- generating a spatially encoded sound-field signal using a sound-field microphone system comprising at least two microphones, wherein the spatially encoded sound-field signal comprises a plurality of components, each component including sound from the sound source;
- generating a local microphone signal corresponding to sound from the sound source using a local microphone positioned close to the sound source;
- comparing the local microphone signal with each of the plurality of components to generate a plurality of comparison results;
- and
- using the plurality of comparison results to determine the position of the sound source relative to the sound-field microphone system;
- wherein comparing the local microphone signal with each of the plurality of components comprises determining respective measures of correlation between the local microphone signal and each of the plurality of components;
- and
- wherein to determine the position of the sound source relative to the sound-field microphone system comprises:
- using the measures of correlation to determine a direct sound autocorrelation weighted by spherical harmonics;
- and
- extracting a direction from the sound-field microphone system to the local microphone by evaluating components of the direct sound autocorrelation.
8 more elements
A method of determining a position of a sound source, comprising:
- generating a spatially encoded sound-field signal using a sound-field microphone system comprising at least two microphones, wherein the spatially encoded sound-field signal comprises a plurality of components, each component including sound from the sound source;
- generating a local microphone signal corresponding to sound from the sound source using a local microphone positioned close to the sound source;
- comparing the local microphone signal with each of the plurality of components to generate a plurality of comparison results;
- using the plurality of comparison results to determine the position of the sound source relative to the sound-field microphone system;
- capturing a video signal using a camera system, wherein the sound source is captured within the video signal;
- and
- using optical image tracking techniques to align the spatially encoded sound-field signal and the video signal.
4 more elements
A method of determining a position of a sound source, comprising:
- providing a spatially encoded sound-field signal comprising a plurality of components, each component including sound from the sound source;
- providing a local microphone signal corresponding to sound from the sound source;
- comparing the local microphone signal with each of the plurality of components to generate a plurality of comparison results;
- using the plurality of comparison results to determine the position of the sound source;
- wherein comparing the local microphone signal with each of the plurality of components comprises determining respective measures of correlation between the local microphone signal and each of the plurality of components;
- and
- wherein to determine the position of the sound source comprises:
- using the measures of correlation to determine a direct sound autocorrelation weighted by spherical harmonics;
- and
- extracting a direction from the plurality of components to the local microphone by evaluating components of the direct sound autocorrelation.
7 more elements
A computer software tool configured to:
- receive a spatially encoded sound-field signal comprising a plurality of components, each component including sound from a sound source;
- receive a local microphone signal corresponding to sound from the sound source;
- compare the local microphone signal with each of the plurality of components to generate a plurality of comparison results;
- use the plurality of comparison results to determine a position of the sound source;
- wherein comparing the local microphone signal with each of the plurality of components comprises determining respective measures of correlation between the local microphone signal and each of the plurality of components;
- and
- wherein to determine the position of the sound source comprises:
- using the measures of correlation to determine a direct sound autocorrelation weighted by spherical harmonics;
- and
- extracting a direction from the plurality of components to the local microphone by evaluating components of the direct sound autocorrelation.
7 more elements
A sound source positioning system, comprising:
- a sound-field microphone system which is arranged to output a sound-field signal comprising a plurality of components, each component including sound from a sound source;
- a close microphone which is positioned close to the sound source and is arranged to output a close microphone signal corresponding to sound from the sound source;
- and
- a processor arranged to receive the close microphone signal and the sound-field signal;
- wherein the processor is configured to compare the close microphone signal with each of the plurality of components to generate a plurality of comparison results and to use the plurality of comparison results to determine a position of the sound source relative to the sound-field microphone system;
- wherein to compare the close microphone signal with each of the plurality of components comprises to determine respective measures of correlation between the close microphone signal and each of the plurality of components;
- and
- wherein to determine the position of the sound source relative to the sound-field microphone system comprises:
- to use the measures of correlation to determine a direct sound autocorrelation weighted by spherical harmonics;
- and
- to extract a direction from the sound-field microphone system to the close microphone by evaluating components of the direct sound autocorrelation.
8 more elements
Dependencies are inferred from the claim text.