KR100856246B1 - 실제 잡음 환경의 특성을 반영한 빔포밍 장치 및 방법 - Google Patents
실제 잡음 환경의 특성을 반영한 빔포밍 장치 및 방법 Download PDFInfo
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- KR100856246B1 KR100856246B1 KR1020070012803A KR20070012803A KR100856246B1 KR 100856246 B1 KR100856246 B1 KR 100856246B1 KR 1020070012803 A KR1020070012803 A KR 1020070012803A KR 20070012803 A KR20070012803 A KR 20070012803A KR 100856246 B1 KR100856246 B1 KR 100856246B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers
- H04R3/005—Circuits for transducers for combining the signals of two or more microphones
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/15—Correlation function computation including computation of convolution operations
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R2203/00—Details of circuits for transducers, loudspeakers or microphones covered by H04R3/00 but not provided for in any of its subgroups
- H04R2203/12—Beamforming aspects for stereophonic sound reproduction with loudspeaker arrays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/20—Processing of the output signals of the acoustic transducers of an array for obtaining a desired directivity characteristic
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Data Mining & Analysis (AREA)
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- Theoretical Computer Science (AREA)
- Computing Systems (AREA)
- Algebra (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
Claims (10)
- 실제 잡음 환경의 특성을 반영한 빔포밍 장치에 있어서,적어도 하나의 마이크로폰으로 구성되고, 상기 마이크로폰을 통해 입력되는 입력신호를 출력하는 마이크로폰 어레이와,상기 입력신호가 입력되면, 상기 입력신호에 대해 각 마이크로폰 간격에 따른 코히런스들을 계산한 후, 동일거리 별로 각각 코히런스들의 평균을 계산하고, 계산된 평균 코히런스들을 필터링 한 후 출력하는 코히런스 함수 생성부,상기 필터링된 평균 코히런스들을 이용하여 공간필터 계수를 산출하여 출력하는 공간필터 계수 산출부와,상기 공간필터 계수를 이용하여 입력신호에 대한 빔포밍을 수행하여 잡음 처리된 신호를 출력하는 빔포밍 수행부를 포함하는 것을 특징으로 하는 빔포밍 장치.
- 제 1항에 있어서,상기 마이크로폰 어레이들은 동일 간격으로 일렬로 배치되는 것을 특징으로 하는 빔포밍 장치.
- 제 1항에 있어서,상기 입력신호는 잡음구간과 음성구간이 포함된 음성신호인 것을 특징으로 하는 빔포밍 장치.
- 제 3항에 있어서,상기 코히런스 함수 생성부는,상기 입력신호에 대해 잡음구간에서 각 마이크로폰 간격에 따른 코히런스들을 계산하여 출력하는 코히런스 계산부와,상기 코히런스 계산부로부터 입력되는 코히런스들에 대해 동일거리 별로 각각 코히런스들의 평균값을 계산하여 출력하는 코히런스 평균 산출부와,상기 코히런스들의 평균값들이 주파수에 따라 급격한 변화를 완만하게 하기 위해 필터링 한 후 출력하는 필터부를 포함하여 구성되는 것을 특징으로 하는 빔포밍 장치.
- 제 3항에 있어서, 상기 코히런스 평균 산출부에서 계산되는 평균값은 상기 각각의 마이크로폰들 간에 대해 동일 거리마다 각각의 코히런스 평균값이 산출되는 것을 특징으로 하는 빔포밍 장치.
- 제 4항에 있어서, 상기 필터부에서 상기 코히런스들의 평균값들에 대해 필터링하는 방법은 이동평균필터(moving average filter)를 적용하는 방법, 코히런스 함수를 푸리에 변환하여 저역 통과 필터를 거치는 방법, 미디언(median) 필터를 이용하는 방법, 1차원 가우시안 스무딩(gaussian smoothing) 필터를 이용하는 방법 중 하나의 방법을 이용하여 필터링 하는 것을 특징으로 하는 빔포밍 장치.
- 적어도 하나의 마이크로폰으로 구성되는 마이크로폰 어레이를 구비하는 음성인식 장치에서 실제 잡음 환경의 특성을 반영하여 빔포밍하기 위한 방법에 있어서,상기 마이크로폰으로 입력신호가 입력되면, 상기 입력신호에 대해 각 마이크로폰 간격에 따른 코히런스들을 계산하고, 상기 마이크로폰들의 동일거리 별로 각각 코히런스들의 평균을 계산하는 과정과,상기 계산된 평균 코히런스들을 필터링 한 후 상기 필터링된 평균 코히런스들을 이용하여 공간필터 계수를 산출하여 과정과,상기 공간필터 계수를 이용하여 입력신호에 대한 빔포밍을 수행하여 잡음 처리된 신호를 출력하는 과정을 포함하여 이루어진 것을 특징으로 하는 빔포밍 방법.
- 제 7항에 있어서,상기 입력신호에 대해 각 마이크로폰 간격에 따른 코히런스들을 계산 시 상 기 입력신호에 대해 잡음구간에서 각 마이크로폰 간격에 따른 코히런스들을 계산하것을 특징으로 하는 빔포밍 방법.
- 제 7항에 있어서, 상기 마이크로폰들의 동일거리 별로 각각 계산되는 코히런스 평균값은 상기 각각의 마이크로폰들 간에 대해 동일 거리마다 각각의 코히런스 평균값이 산출되는 것을 특징으로 하는 빔포밍 방법.
- 제 7항에 있어서,상기 계산된 평균 코히런스들을 필터링은,이동평균필터(moving average filter)를 적용하는 방법, 코히런스 함수를 푸리에 변환하여 저역 통과 필터를 거치는 방법, 미디언(median) 필터를 이용하는 방법, 1차원 가우시안 스무딩(gaussian smoothing) 필터를 이용하는 방법 중 하나의 방법을 이용하여 필터링 하는 것을 특징으로 하는 빔포밍 방법.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070012803A KR100856246B1 (ko) | 2007-02-07 | 2007-02-07 | 실제 잡음 환경의 특성을 반영한 빔포밍 장치 및 방법 |
| US12/013,875 US8116478B2 (en) | 2007-02-07 | 2008-01-14 | Apparatus and method for beamforming in consideration of actual noise environment character |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070012803A KR100856246B1 (ko) | 2007-02-07 | 2007-02-07 | 실제 잡음 환경의 특성을 반영한 빔포밍 장치 및 방법 |
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| Publication Number | Publication Date |
|---|---|
| KR20080073936A KR20080073936A (ko) | 2008-08-12 |
| KR100856246B1 true KR100856246B1 (ko) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020070012803A Expired - Fee Related KR100856246B1 (ko) | 2007-02-07 | 2007-02-07 | 실제 잡음 환경의 특성을 반영한 빔포밍 장치 및 방법 |
Country Status (2)
| Country | Link |
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| US (1) | US8116478B2 (ko) |
| KR (1) | KR100856246B1 (ko) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009076523A1 (en) * | 2007-12-11 | 2009-06-18 | Andrea Electronics Corporation | Adaptive filtering in a sensor array system |
| US9392360B2 (en) | 2007-12-11 | 2016-07-12 | Andrea Electronics Corporation | Steerable sensor array system with video input |
| EP2395506B1 (en) * | 2010-06-09 | 2012-08-22 | Siemens Medical Instruments Pte. Ltd. | Method and acoustic signal processing system for interference and noise suppression in binaural microphone configurations |
| KR101103794B1 (ko) * | 2010-10-29 | 2012-01-06 | 주식회사 마이티웍스 | 멀티 빔 음향시스템 |
| CN102306496B (zh) * | 2011-09-05 | 2014-07-09 | 歌尔声学股份有限公司 | 一种多麦克风阵列噪声消除方法、装置及系统 |
| FR2979988B1 (fr) * | 2011-09-12 | 2013-09-20 | Renault Sa | Systeme et procede de caracterisation d'une grandeur physique, notamment le bruit emis par un vehicule automobile |
| JP5817366B2 (ja) * | 2011-09-12 | 2015-11-18 | 沖電気工業株式会社 | 音声信号処理装置、方法及びプログラム |
| US9078057B2 (en) * | 2012-11-01 | 2015-07-07 | Csr Technology Inc. | Adaptive microphone beamforming |
| DE102013205790B4 (de) * | 2013-04-02 | 2017-07-06 | Sivantos Pte. Ltd. | Verfahren zum Schätzen eines Nutzsignals und Hörvorrichtung |
| WO2016093854A1 (en) | 2014-12-12 | 2016-06-16 | Nuance Communications, Inc. | System and method for speech enhancement using a coherent to diffuse sound ratio |
| CN105869651B (zh) * | 2016-03-23 | 2019-05-31 | 北京大学深圳研究生院 | 基于噪声混合相干性的双通道波束形成语音增强方法 |
| KR101811635B1 (ko) * | 2017-04-27 | 2018-01-25 | 경상대학교산학협력단 | 스테레오 채널 잡음 제거 장치 및 방법 |
| US10433051B2 (en) * | 2017-05-29 | 2019-10-01 | Staton Techiya, Llc | Method and system to determine a sound source direction using small microphone arrays |
| TWI861569B (zh) * | 2022-03-07 | 2024-11-11 | 英屬開曼群島商意騰科技股份有限公司 | 麥克風系統 |
| KR102893393B1 (ko) * | 2022-07-14 | 2025-11-28 | 서강대학교산학협력단 | 강인한 음성인식을 위한 타겟 마스크 및 독립성분분석 기반의 실시간 빔포밍 및 방향 벡터 추정 방법 |
| KR102846476B1 (ko) * | 2023-02-27 | 2025-08-14 | 주식회사 금산코리아 | 인공지능기반 소리인식모듈 및 이를 이용한 소리인식카메라 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581620A (en) | 1994-04-21 | 1996-12-03 | Brown University Research Foundation | Methods and apparatus for adaptive beamforming |
| KR20060043338A (ko) * | 2004-03-02 | 2006-05-15 | 마이크로소프트 코포레이션 | 마이크로폰 어레이를 사용하는 빔성형 시스템 및 방법 |
| KR20060085392A (ko) * | 2005-01-24 | 2006-07-27 | 현대자동차주식회사 | 어레이 마이크 시스템 |
| KR20060127078A (ko) * | 2003-12-24 | 2006-12-11 | 노키아 코포레이션 | 적응적 간섭 제거기의 적응 제어 조정 방법 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1236607A (en) * | 1985-09-23 | 1988-05-10 | Northern Telecom Limited | Microphone arrangement |
| ATE430975T1 (de) * | 2006-07-10 | 2009-05-15 | Harman Becker Automotive Sys | Reduzierung von hintergrundrauschen in freisprechsystemen |
-
2007
- 2007-02-07 KR KR1020070012803A patent/KR100856246B1/ko not_active Expired - Fee Related
-
2008
- 2008-01-14 US US12/013,875 patent/US8116478B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581620A (en) | 1994-04-21 | 1996-12-03 | Brown University Research Foundation | Methods and apparatus for adaptive beamforming |
| KR20060127078A (ko) * | 2003-12-24 | 2006-12-11 | 노키아 코포레이션 | 적응적 간섭 제거기의 적응 제어 조정 방법 |
| KR20060043338A (ko) * | 2004-03-02 | 2006-05-15 | 마이크로소프트 코포레이션 | 마이크로폰 어레이를 사용하는 빔성형 시스템 및 방법 |
| KR20060085392A (ko) * | 2005-01-24 | 2006-07-27 | 현대자동차주식회사 | 어레이 마이크 시스템 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080073936A (ko) | 2008-08-12 |
| US20080187152A1 (en) | 2008-08-07 |
| US8116478B2 (en) | 2012-02-14 |
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