WO2004045244A8 - Adaptative noise canceling microphone system - Google Patents

Adaptative noise canceling microphone system

Info

Publication number
WO2004045244A8
WO2004045244A8 PCT/SG2003/000215 SG0300215W WO2004045244A8 WO 2004045244 A8 WO2004045244 A8 WO 2004045244A8 SG 0300215 W SG0300215 W SG 0300215W WO 2004045244 A8 WO2004045244 A8 WO 2004045244A8
Authority
WO
WIPO (PCT)
Prior art keywords
signal
speech
enhanced
acoustical
microphone system
Prior art date
Application number
PCT/SG2003/000215
Other languages
French (fr)
Other versions
WO2004045244A1 (en
Inventor
Zhu Liang Yu
Wee Ser
Original Assignee
Univ Nanyang
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 Univ Nanyang filed Critical Univ Nanyang
Priority to AU2003265213A priority Critical patent/AU2003265213A1/en
Publication of WO2004045244A1 publication Critical patent/WO2004045244A1/en
Publication of WO2004045244A8 publication Critical patent/WO2004045244A8/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1082—Microphones, e.g. systems using "virtual" microphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3018—Correlators, e.g. convolvers or coherence calculators

Abstract

Abstract ADAPTIVE NOISE CANCELING MICROPHONE SYSTEM An adaptive noise canceling microphone system for extracting a desired signal, in particular a desired speech signal, comprising two microphones being arranged at a predefined distance from each other; a signal forming system (SFS) being adapted to receive a first and second input signals resulting from sounds received by the two microphones wherein an acoustical signal component in the first input signal is determined, wherein an acoustical signal component in the second input signal is determined, wherein the acoustical signal component in the first input signal is enhanced to generate a speech enhanced signal, and wherein the acoustical signal component in the second input signal is suppressed to generate a speech mulled signal; an adaptive noise cancellation filtering circuit being adapted to receive the speech enhanced signal and the speech nulled signal, wherein the noise in the speech enhanced signal is cancelled using the speech nulled signal as reference, thereby generating an output filtered signal representing the desired signal.
PCT/SG2003/000215 2002-09-11 2003-09-10 Adaptative noise canceling microphone system WO2004045244A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003265213A AU2003265213A1 (en) 2002-09-11 2003-09-10 Adaptative noise canceling microphone system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/238,867 US6917688B2 (en) 2002-09-11 2002-09-11 Adaptive noise cancelling microphone system
US10/238,867 2002-09-11

Publications (2)

Publication Number Publication Date
WO2004045244A1 WO2004045244A1 (en) 2004-05-27
WO2004045244A8 true WO2004045244A8 (en) 2005-04-21

Family

ID=31991048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2003/000215 WO2004045244A1 (en) 2002-09-11 2003-09-10 Adaptative noise canceling microphone system

Country Status (3)

Country Link
US (1) US6917688B2 (en)
AU (1) AU2003265213A1 (en)
WO (1) WO2004045244A1 (en)

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US6917688B2 (en) 2005-07-12
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WO2004045244A1 (en) 2004-05-27

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