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1. WO2013009949 - MICROPHONE ARRAY PROCESSING SYSTEM

Publication Number WO/2013/009949
Publication Date 17.01.2013
International Application No. PCT/US2012/046396
International Filing Date 12.07.2012
IPC
H04R 3/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers
H04R 1/40 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1Details of transducers
20Arrangements for obtaining desired frequency or directional characteristics
32for obtaining desired directional characteristic only
40by combining a number of identical transducers
CPC
H04R 1/406
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1Details of transducers, ; loudspeakers or microphones
20Arrangements for obtaining desired frequency or directional characteristics
32for obtaining desired directional characteristic only
40by combining a number of identical transducers
406microphones
H04R 3/005
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers ; , loudspeakers or microphones
005for combining the signals of two or more microphones
H04S 2400/15
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS 
2400Details of stereophonic systems covered by H04S but not provided for in its groups
15Aspects of sound capture and related signal processing for recording or reproduction
Applicants
  • DTS LLC [US]/[US] (AllExceptUS)
  • QIAN, Shie [US]/[US] (UsOnly)
  • ZHENG, Zhonghou [CN]/[CN] (UsOnly)
Inventors
  • QIAN, Shie
  • ZHENG, Zhonghou
Agents
  • KING, John, R.
Priority Data
61/507,42013.07.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MICROPHONE ARRAY PROCESSING SYSTEM
(FR) SYSTÈME DE TRAITEMENT D'ENSEMBLE DE MICROPHONES
Abstract
(EN)
An audio system is provided that employs time-frequency analysis and/or synthesis techniques for processing audio obtained from a microphone array. These time- frequency analysis/synthesis techniques can be more robust, provide better spatial resolution, and have less computational complexity than existing adaptive filter implementations. The time-frequency techniques can be implemented for dual microphone arrays or for microphone arrays having more than two microphones. Many different time-frequency techniques may be used in the audio system. As one example, the Gabor transform may be used to analyze time and frequency components of audio signals obtained from the microphone array.
(FR)
La présente invention concerne un système audio qui emploie des techniques d'analyse et/ou de synthèse de temps-fréquence permettant un traitement audio à partir d'un ensemble de microphones. Ces techniques d'analyse/synthèse de temps-fréquence peuvent être plus fiables. De plus, elles permettent une meilleure résolution spatiale et présentent une complexité de calcul inférieure à celle des applications actuelles de filtre adaptatif. Les techniques de temps-fréquence peuvent être appliquées à des ensembles de microphones comportant au moins deux microphones. Il est possible d'utiliser de nombreuses techniques de temps-fréquence différentes dans le système audio. A titre d'exemple, la transformée de Gabor peut servir à analyser des composantes de temps et de fréquence de signaux audio provenant de l'ensemble de microphones.
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