Title:
CALIBRATION OF MICROPHONE ARRAYS WITH AN UNCALIBRATED SOURCE
Document Type and Number:
WIPO Patent Application WO/2019/138054
Kind Code:
A1
Abstract:
Microphone array calibration that does not require a calibrated source or calibrated reference microphone is provided. We provide a statistical (Bayesian) algorithm that (under condition of reasonable environment noise during calibration) can determine gain and phase differences of a whole array at once, even when the gain and/or phase of the source is unknown.
More specifically, a Bayesian regression with complex log- normal prior and complex normal likelihood is employed. The inherent phase-wrapping ambiguity in this regression is resolved by exploiting the similarity of likelihood between a lattice point and its Euclidean Voronoi region.
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Inventors:
WIJNINGS PATRICK (NL)
SCHOLTE RICK (NL)
SCHOLTE RICK (NL)
Application Number:
PCT/EP2019/050658
Publication Date:
July 18, 2019
Filing Date:
January 11, 2019
Export Citation:
Assignee:
SORAMA (NL)
International Classes:
H04R29/00
Foreign References:
| CN101668243A | 2010-03-10 | |||
| EP1453349A2 | 2004-09-01 |
Other References:
CHRISTOPHE SCHUELKE: "Statistical physics of linear and bilinear inference problems", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 3 July 2016 (2016-07-03), XP080711742
MORELANDE, IEEE CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, 2008, pages 3441 - 3444
MORELANDE, IEEE CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, 2008, pages 3441 - 3444
Attorney, Agent or Firm:
FRKELLY (IE)
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