WO2004053838A3 - Method and apparatus for noise reduction - Google Patents

Method and apparatus for noise reduction Download PDF

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Publication number
WO2004053838A3
WO2004053838A3 PCT/US2003/038657 US0338657W WO2004053838A3 WO 2004053838 A3 WO2004053838 A3 WO 2004053838A3 US 0338657 W US0338657 W US 0338657W WO 2004053838 A3 WO2004053838 A3 WO 2004053838A3
Authority
WO
WIPO (PCT)
Prior art keywords
noise reduction
noise
hands
communication system
free
Prior art date
Application number
PCT/US2003/038657
Other languages
French (fr)
Other versions
WO2004053838A2 (en
Inventor
Kambiz C Zangi
Steven Isabelle
Original Assignee
Liberato Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liberato Technologies Inc filed Critical Liberato Technologies Inc
Priority to EP03796674A priority Critical patent/EP1576587A2/en
Priority to AU2003298914A priority patent/AU2003298914A1/en
Publication of WO2004053838A2 publication Critical patent/WO2004053838A2/en
Publication of WO2004053838A3 publication Critical patent/WO2004053838A3/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
    • G10L2021/02165—Two microphones, one receiving mainly the noise signal and the other one mainly the speech signal
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
    • G10L2021/02166—Microphone arrays; Beamforming

Abstract

An apparatus and method for noise reduction is described. The method and apparatus can be used in a hands-free communication system to provide a hands-free a communication system having improved intelligibility. The apparatus includes a first and a second processor, each separately dynamically adapted to changing signals and noise, to improve a signal to noise ratio.
PCT/US2003/038657 2002-12-10 2003-12-05 Method and apparatus for noise reduction WO2004053838A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03796674A EP1576587A2 (en) 2002-12-10 2003-12-05 Method and apparatus for noise reduction
AU2003298914A AU2003298914A1 (en) 2002-12-10 2003-12-05 Method and apparatus for noise reduction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/315,615 2002-12-10
US10/315,615 US7162420B2 (en) 2002-12-10 2002-12-10 System and method for noise reduction having first and second adaptive filters

Publications (2)

Publication Number Publication Date
WO2004053838A2 WO2004053838A2 (en) 2004-06-24
WO2004053838A3 true WO2004053838A3 (en) 2004-08-05

Family

ID=32468751

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/038657 WO2004053838A2 (en) 2002-12-10 2003-12-05 Method and apparatus for noise reduction

Country Status (4)

Country Link
US (1) US7162420B2 (en)
EP (1) EP1576587A2 (en)
AU (1) AU2003298914A1 (en)
WO (1) WO2004053838A2 (en)

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Also Published As

Publication number Publication date
EP1576587A2 (en) 2005-09-21
WO2004053838A2 (en) 2004-06-24
AU2003298914A1 (en) 2004-06-30
US20040111258A1 (en) 2004-06-10
US7162420B2 (en) 2007-01-09

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