JPWO2006095736A1 - 騒音除去装置 - Google Patents
騒音除去装置 Download PDFInfo
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- JPWO2006095736A1 JPWO2006095736A1 JP2007507125A JP2007507125A JPWO2006095736A1 JP WO2006095736 A1 JPWO2006095736 A1 JP WO2006095736A1 JP 2007507125 A JP2007507125 A JP 2007507125A JP 2007507125 A JP2007507125 A JP 2007507125A JP WO2006095736 A1 JPWO2006095736 A1 JP WO2006095736A1
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- 230000003044 adaptive effect Effects 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000004422 calculation algorithm Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 11
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 238000002474 experimental method Methods 0.000 description 6
- 230000001629 suppression Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 2
- 238000005094 computer simulation Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
-
- 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
- G10L2021/02165—Two microphones, one receiving mainly the noise signal and the other one mainly the speech signal
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- General Health & Medical Sciences (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
網谷他,信学技報,US84−98,pp.41−46,Jan 2002.
Claims (4)
- 第1のマイクロホンと、第2のマイクロホンと、信号処理部とを備え、
該信号処理部は、線形予測フィルタと、騒音再合成フィルタとを有し、
該線形予測フィルタは、該第1のマイクロホンの出力信号を入力し、該第1のマイクロホンの出力信号を線形予測によって予測して予測信号を生成し、
該騒音再合成フィルタは、該第1のマイクロホンの出力信号と該予測信号とのうちの一方を他方から差し引くことによって得られる第1の差信号を主入力信号として入力し、該第2のマイクロホンの出力信号と自己の出力信号とのうちの一方を他方から差し引くことによって得られる第2の差信号を誤差信号として入力し、該誤差信号を最小化するようにフィルタ係数を更新する適応フィルタである、騒音除去装置。 - 該騒音再合成フィルタの時刻j+1における係数ベクトルが、時刻jにおける係数ベクトルに更新ベクトルを加算することによって作成され、
該騒音再合成フィルタが適用する適応アルゴリズムによって決定される更新ベクトルの大きさが所定値より大きいとき、その方向を変化させることなくその大きさが該所定値になるように更新ベクトルを縮小し、縮小された更新ベクトルによって該騒音再合成フィルタの係数ベクトルを更新する、請求項1記載の騒音除去装置。 - 該騒音再合成フィルタが適用する適応アルゴリズムが、学習同定法である、請求項1又は2記載の騒音除去装置。
- 該線形予測フィルタが、該第1の差信号を誤差信号として入力し、該誤差信号を最小化するようにフィルタ係数を更新する適応フィルタである、請求項1乃至3のいずれか一の項に記載の騒音除去装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005062935 | 2005-03-07 | ||
JP2005062935 | 2005-03-07 | ||
PCT/JP2006/304378 WO2006095736A1 (ja) | 2005-03-07 | 2006-03-07 | 騒音除去装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP4074656B2 JP4074656B2 (ja) | 2008-04-09 |
JPWO2006095736A1 true JPWO2006095736A1 (ja) | 2008-08-14 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007507125A Active JP4074656B2 (ja) | 2005-03-07 | 2006-03-07 | 騒音除去装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8180068B2 (ja) |
JP (1) | JP4074656B2 (ja) |
WO (1) | WO2006095736A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4879195B2 (ja) * | 2007-01-17 | 2012-02-22 | ティーオーエー株式会社 | 騒音低減装置 |
KR101470940B1 (ko) * | 2007-07-06 | 2014-12-09 | 오렌지 | 디지털 신호 디코딩에서 후처리 단계에서 생기는 왜곡 제한 |
JP5191413B2 (ja) * | 2009-02-05 | 2013-05-08 | Toa株式会社 | 同定装置および同定方法 |
US9082391B2 (en) * | 2010-04-12 | 2015-07-14 | Telefonaktiebolaget L M Ericsson (Publ) | Method and arrangement for noise cancellation in a speech encoder |
GB2486639A (en) * | 2010-12-16 | 2012-06-27 | Zarlink Semiconductor Inc | Reducing noise in an environment having a fixed noise source such as a camera |
US9204065B2 (en) * | 2013-10-28 | 2015-12-01 | Nokia Corporation | Removing noise generated from a non-audio component |
WO2017160294A1 (en) * | 2016-03-17 | 2017-09-21 | Nuance Communications, Inc. | Spectral estimation of room acoustic parameters |
US10366701B1 (en) * | 2016-08-27 | 2019-07-30 | QoSound, Inc. | Adaptive multi-microphone beamforming |
US10609468B2 (en) | 2016-09-16 | 2020-03-31 | Avatronics Sarl | Active noise cancellation system for headphone |
WO2018119467A1 (en) | 2016-12-23 | 2018-06-28 | Synaptics Incorporated | Multiple input multiple output (mimo) audio signal processing for speech de-reverberation |
JP7175441B2 (ja) | 2016-12-23 | 2022-11-21 | シナプティクス インコーポレイテッド | 雑音のある時変環境のための重み付け予測誤差に基づくオンライン残響除去アルゴリズム |
US10473751B2 (en) | 2017-04-25 | 2019-11-12 | Cisco Technology, Inc. | Audio based motion detection |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3381731B2 (ja) * | 1992-08-14 | 2003-03-04 | ソニー株式会社 | 雑音低減装置 |
JP3301445B2 (ja) * | 1992-08-25 | 2002-07-15 | ソニー株式会社 | 音声入力装置 |
JP3489587B2 (ja) * | 1992-09-30 | 2004-01-19 | ソニー株式会社 | 適応型雑音低減装置 |
KR100394840B1 (ko) * | 2000-11-30 | 2003-08-19 | 한국과학기술원 | 독립 성분 분석을 이용한 능동 잡음 제거방법 |
CA2354808A1 (en) * | 2001-08-07 | 2003-02-07 | King Tam | Sub-band adaptive signal processing in an oversampled filterbank |
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2006
- 2006-03-07 US US11/817,868 patent/US8180068B2/en active Active
- 2006-03-07 WO PCT/JP2006/304378 patent/WO2006095736A1/ja active Application Filing
- 2006-03-07 JP JP2007507125A patent/JP4074656B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
US20090214054A1 (en) | 2009-08-27 |
WO2006095736A1 (ja) | 2006-09-14 |
JP4074656B2 (ja) | 2008-04-09 |
US8180068B2 (en) | 2012-05-15 |
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