KR960032294A - 잡음 저감 방법 및 장치 - Google Patents
잡음 저감 방법 및 장치 Download PDFInfo
- Publication number
- KR960032294A KR960032294A KR1019960003844A KR19960003844A KR960032294A KR 960032294 A KR960032294 A KR 960032294A KR 1019960003844 A KR1019960003844 A KR 1019960003844A KR 19960003844 A KR19960003844 A KR 19960003844A KR 960032294 A KR960032294 A KR 960032294A
- Authority
- KR
- South Korea
- Prior art keywords
- noise
- level
- value
- estimated
- frequency spectrum
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- G10L2021/02163—Only one microphone
-
- 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
- G10L21/0232—Processing in the frequency domain
-
- 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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/27—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the analysis technique
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Noise Elimination (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Vehicle Body Suspensions (AREA)
- Stereo-Broadcasting Methods (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Electric Ovens (AREA)
- Circuit For Audible Band Transducer (AREA)
- Treating Waste Gases (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
Claims (5)
- 잡음 억제를 위해 입력 음성 신호 내의 잡음을 저감하는 방법에 있어서, 상기 입력 음성 신호를 주파수 스펙트럼으로 변환하는 단계, 상기 주파수 스펙트럼의 레벨의 상기 주파수 스펙트럼 내에 포함된 잡음 스펙트럼의 추정 레벨에 대한 비에 근거하여 획득된 제1치 및 상기 주파수 스펙트럼의 프레임에 기초한 신호 레벨의 상기 추정 레벨에 대한 비의 최대값 및 상기 추정 잡음 레벨로부터 구해진 제2치에 따라 필터 특성을 측정하는 단계, 및 상기 필터 특성에 응답하여 필터링함으로써 상기 입력 음성 신호내의 잡음을 저감하는 단계를 포함하는 것을 특징으로 하는 잡음 저감 방법.
- 제1항에 있어서, 상기 제1치가 상기 입력 신호의 소정의 레벨 및 상기 잡음 스펙트럼의 추정 레벨을 포함하는 테이블로부터 획득된 값을 사용하여 구해지는 것을 특징으로 하는 잡음 저감 방법.
- 제1항에 있어서, 상기 제2치가 상기 신호 레벨의 상기 추정 잡음 레벨에 대한 비의 최대값 및 프레임에 기초한 잡음 레벨레 응답하여 획득된 값이며, 상기 필터 특성에 따라 필터링함으로써 최대 잡음 저감량이 dB영역에서 거의 선형적으로 변화되게 하기 위해서 상기 최대 잡음 저감량을 조절하는 값인 것을 특징으로 하는 잡음 저감 방법.
- 제1항에 있어서, 상기 추정 잡음 레벨이 프레임에 기초한 입력 신호의 진폭의 제곱 평균값 및 상기 제곱 평균값에 근거하여 획득된 값이며, 상기 신호 레벨의 상기 추정 잡음에 대한 비의 최대값이 상기 제곱 평균값의 최대값 및 추정 잡음 레벨에 근거하여 산출된 값이고, 상기 제곱 평균값의 최대값은 프레임에 기초한 입력 신호의 진폭의 제곱 평균값, 바로 이전 프레임의 제곱 평균값의 최대값에 근거하여 획득된 값 및 소정의 값 중에서 최대값인 것을 특징으로 하는 잡음 저감 방법.
- 잡음 억제를 위해 입력 음성 신호 내의 잡음을 저감하는 장치에 있어서, 상기 입력 음성 신호를 주파수 스펙트럼으로 변환하는 수단, 상기 주파수 스펙트럼의 레벨의 상기 주파수 스펙트럼 내에 포함된 잡음 스펙트럼의 추정 레벨에 대한 비에 근거하여 획득된 제1치 및 상기 주파수 스펙트럼의 프레임에 기초한 신호 레벨의 상기 추정 레벨에 대한 비의 최대값 및 상기 추정 잡음 레벨로부터 구해진 제2치에 따라 필터 특성을 측정하는 수단, 및 상기 필터 특성에 응답하여 필터링함으로써 상기 입력 음성 신호내의 잡음을 저감하는 수단을 포함하는 것을 특징으로 하는 저감 장치.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP02933695A JP3484801B2 (ja) | 1995-02-17 | 1995-02-17 | 音声信号の雑音低減方法及び装置 |
JP95-029336 | 1995-02-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960032294A true KR960032294A (ko) | 1996-09-17 |
KR100414841B1 KR100414841B1 (ko) | 2004-03-10 |
Family
ID=12273403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960003844A Expired - Lifetime KR100414841B1 (ko) | 1995-02-17 | 1996-02-16 | 잡음저감방법및장치 |
Country Status (17)
Country | Link |
---|---|
US (1) | US6032114A (ko) |
EP (1) | EP0727769B1 (ko) |
JP (1) | JP3484801B2 (ko) |
KR (1) | KR100414841B1 (ko) |
CN (1) | CN1140869A (ko) |
AT (1) | ATE209389T1 (ko) |
AU (1) | AU696187B2 (ko) |
BR (1) | BR9600761A (ko) |
CA (1) | CA2169424C (ko) |
DE (1) | DE69617069T2 (ko) |
ES (1) | ES2163585T3 (ko) |
MY (1) | MY121575A (ko) |
PL (1) | PL184098B1 (ko) |
RU (1) | RU2127454C1 (ko) |
SG (1) | SG52253A1 (ko) |
TR (1) | TR199600132A2 (ko) |
TW (1) | TW297970B (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100314332B1 (ko) * | 1998-03-30 | 2001-11-16 | 다니구찌 이찌로오, 기타오카 다카시 | 잡음 경감 장치 및 잡음 경감 방법 |
Families Citing this family (39)
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JP3484757B2 (ja) * | 1994-05-13 | 2004-01-06 | ソニー株式会社 | 音声信号の雑音低減方法及び雑音区間検出方法 |
JP3591068B2 (ja) * | 1995-06-30 | 2004-11-17 | ソニー株式会社 | 音声信号の雑音低減方法 |
KR100482396B1 (ko) * | 1996-05-31 | 2005-08-04 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 입력신호의간섭성분을억제하는장치 |
JP3454206B2 (ja) | 1999-11-10 | 2003-10-06 | 三菱電機株式会社 | 雑音抑圧装置及び雑音抑圧方法 |
US7139711B2 (en) * | 2000-11-22 | 2006-11-21 | Defense Group Inc. | Noise filtering utilizing non-Gaussian signal statistics |
US6985859B2 (en) * | 2001-03-28 | 2006-01-10 | Matsushita Electric Industrial Co., Ltd. | Robust word-spotting system using an intelligibility criterion for reliable keyword detection under adverse and unknown noisy environments |
JP3457293B2 (ja) * | 2001-06-06 | 2003-10-14 | 三菱電機株式会社 | 雑音抑圧装置及び雑音抑圧方法 |
JP3427381B2 (ja) * | 2001-06-20 | 2003-07-14 | 富士通株式会社 | 雑音キャンセル方法及び装置 |
WO2003001173A1 (en) * | 2001-06-22 | 2003-01-03 | Rti Tech Pte Ltd | A noise-stripping device |
US6985709B2 (en) * | 2001-06-22 | 2006-01-10 | Intel Corporation | Noise dependent filter |
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AU2003209821B2 (en) * | 2002-03-13 | 2006-11-16 | Hear Ip Pty Ltd | A method and system for controlling potentially harmful signals in a signal arranged to convey speech |
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US6920193B2 (en) * | 2002-12-19 | 2005-07-19 | Texas Instruments Incorporated | Wireless receiver using noise levels for combining signals having spatial diversity |
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JP4836720B2 (ja) * | 2006-09-07 | 2011-12-14 | 株式会社東芝 | ノイズサプレス装置 |
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WO2009119460A1 (ja) | 2008-03-24 | 2009-10-01 | 日本ビクター株式会社 | オーディオ信号処理装置及びオーディオ信号処理方法 |
KR101475864B1 (ko) | 2008-11-13 | 2014-12-23 | 삼성전자 주식회사 | 잡음 제거 장치 및 잡음 제거 방법 |
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JP6002690B2 (ja) * | 2011-02-10 | 2016-10-05 | ドルビー ラボラトリーズ ライセンシング コーポレイション | オーディオ入力信号処理システム |
US8712076B2 (en) | 2012-02-08 | 2014-04-29 | Dolby Laboratories Licensing Corporation | Post-processing including median filtering of noise suppression gains |
US9173025B2 (en) | 2012-02-08 | 2015-10-27 | Dolby Laboratories Licensing Corporation | Combined suppression of noise, echo, and out-of-location signals |
US9231740B2 (en) * | 2013-07-12 | 2016-01-05 | Intel Corporation | Transmitter noise in system budget |
US10504538B2 (en) | 2017-06-01 | 2019-12-10 | Sorenson Ip Holdings, Llc | Noise reduction by application of two thresholds in each frequency band in audio signals |
CN107786709A (zh) * | 2017-11-09 | 2018-03-09 | 广东欧珀移动通信有限公司 | 通话降噪方法、装置、终端设备及计算机可读存储介质 |
CN111199174B (zh) * | 2018-11-19 | 2024-11-19 | 北京京东尚科信息技术有限公司 | 信息处理方法、装置、系统和计算机可读存储介质 |
CN111477237B (zh) * | 2019-01-04 | 2022-01-07 | 北京京东尚科信息技术有限公司 | 音频降噪方法、装置和电子设备 |
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-
1995
- 1995-02-17 JP JP02933695A patent/JP3484801B2/ja not_active Expired - Lifetime
-
1996
- 1996-02-12 US US08/606,001 patent/US6032114A/en not_active Expired - Lifetime
- 1996-02-12 AU AU44444/96A patent/AU696187B2/en not_active Expired
- 1996-02-13 SG SG1996001434A patent/SG52253A1/en unknown
- 1996-02-13 CA CA002169424A patent/CA2169424C/en not_active Expired - Lifetime
- 1996-02-16 PL PL96312845A patent/PL184098B1/pl unknown
- 1996-02-16 EP EP96301059A patent/EP0727769B1/en not_active Expired - Lifetime
- 1996-02-16 DE DE69617069T patent/DE69617069T2/de not_active Expired - Lifetime
- 1996-02-16 RU RU96102867/09A patent/RU2127454C1/ru not_active IP Right Cessation
- 1996-02-16 MY MYPI96000633A patent/MY121575A/en unknown
- 1996-02-16 KR KR1019960003844A patent/KR100414841B1/ko not_active Expired - Lifetime
- 1996-02-16 ES ES96301059T patent/ES2163585T3/es not_active Expired - Lifetime
- 1996-02-16 BR BR9600761A patent/BR9600761A/pt not_active IP Right Cessation
- 1996-02-16 AT AT96301059T patent/ATE209389T1/de not_active IP Right Cessation
- 1996-02-16 TR TR96/00132A patent/TR199600132A2/xx unknown
- 1996-02-17 CN CN96106052A patent/CN1140869A/zh active Pending
- 1996-05-14 TW TW085105684A patent/TW297970B/zh not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100314332B1 (ko) * | 1998-03-30 | 2001-11-16 | 다니구찌 이찌로오, 기타오카 다카시 | 잡음 경감 장치 및 잡음 경감 방법 |
Also Published As
Publication number | Publication date |
---|---|
PL312845A1 (en) | 1996-08-19 |
KR100414841B1 (ko) | 2004-03-10 |
US6032114A (en) | 2000-02-29 |
CA2169424A1 (en) | 1996-08-18 |
AU4444496A (en) | 1996-08-29 |
CA2169424C (en) | 2007-07-10 |
ATE209389T1 (de) | 2001-12-15 |
PL184098B1 (pl) | 2002-08-30 |
MY121575A (en) | 2006-02-28 |
SG52253A1 (en) | 1998-09-28 |
JP3484801B2 (ja) | 2004-01-06 |
TR199600132A2 (tr) | 1996-10-21 |
EP0727769A2 (en) | 1996-08-21 |
DE69617069D1 (de) | 2002-01-03 |
CN1140869A (zh) | 1997-01-22 |
TW297970B (ko) | 1997-02-11 |
JPH08221093A (ja) | 1996-08-30 |
AU696187B2 (en) | 1998-09-03 |
RU2127454C1 (ru) | 1999-03-10 |
EP0727769B1 (en) | 2001-11-21 |
DE69617069T2 (de) | 2002-07-11 |
BR9600761A (pt) | 1997-12-23 |
ES2163585T3 (es) | 2002-02-01 |
EP0727769A3 (en) | 1998-04-29 |
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