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1. WO2009050487 - ACOUSTIC SOURCE SEPARATION

Publication Number WO/2009/050487
Publication Date 23.04.2009
International Application No. PCT/GB2008/003538
International Filing Date 17.10.2008
IPC
G01L 21/02 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
21Vacuum gauges
02having a compression chamber in which gas, whose pressure is to be measured, is compressed
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
CPC
G10L 21/0272
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02Speech enhancement, e.g. noise reduction or echo cancellation
0272Voice signal separating
H04R 1/1083
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
10Earpieces; Attachments therefor ; ; Earphones; Monophonic headphones
1083Reduction of ambient noise
H04R 2225/43
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
2225Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
43Signal processing in hearing aids to enhance the speech intelligibility
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
  • THE UNIVERSITY OF SURREY [GB]/[GB] (AllExceptUS)
  • GUNEL HACIHABIBOGLU, Banu [TR]/[GB] (UsOnly)
  • HACIHABIBOGLU, Huseyin [TR]/[GB] (UsOnly)
  • KONDOZ, Ahmet [GB]/[GB] (UsOnly)
Inventors
  • GUNEL HACIHABIBOGLU, Banu
  • HACIHABIBOGLU, Huseyin
  • KONDOZ, Ahmet
Agents
  • WILSON, Alan, Stuart
Priority Data
0720473.819.10.2007GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ACOUSTIC SOURCE SEPARATION
(FR) SÉPARATION DE SOURCE ACOUSTIQUE
Abstract
(EN)
A method of separating a mixture of acoustic signals from a plurality of sources comprises: providing pressure signals indicative of time- varying acoustic pressure in the mixture; defining a series of time windows; and for each time window: a) providing from the pressure signals a series of sample values of measured directional pressure gradient; b) identifying different frequency components of the pressure signals c) for each frequency component defining an associated direction; and d) from the frequency components and their associated directions generating a separated signal for one of the sources.
(FR)
L'invention concerne un procédé de séparation d'un mélange de signaux acoustiques provenant d'une pluralité de sources. Le procédé consiste à fournir des signaux de pression indicatifs d'une pression acoustique variant dans le temps dans le mélange; définir une série de plages de temps pour chacune desquelles a) une série de valeurs d'échantillon d'un gradient de pression directionnelle mesuré est fourni à partir des signaux de pression; b) les différentes composantes de fréquence des signaux de pression sont identifiées; c) une direction associée est définie pour chaque composante de fréquence; et d) à partir des composantes de fréquence et de leurs directions associées, un signal séparé pour l'une des sources est généré.
Also published as
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