JP4074656B2 - 騒音除去装置 - Google Patents
騒音除去装置 Download PDFInfo
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- JP4074656B2 JP4074656B2 JP2007507125A JP2007507125A JP4074656B2 JP 4074656 B2 JP4074656 B2 JP 4074656B2 JP 2007507125 A JP2007507125 A JP 2007507125A JP 2007507125 A JP2007507125 A JP 2007507125A JP 4074656 B2 JP4074656 B2 JP 4074656B2
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- 238000004422 calculation algorithm Methods 0.000 claims description 20
- 230000003044 adaptive effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 238000005215 recombination Methods 0.000 claims description 2
- 230000006798 recombination Effects 0.000 claims description 2
- 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
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003786 synthesis reaction 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)
Description
網谷他,信学技報,US84−98,pp.41−46,Jan 2002.
Claims (3)
- 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り、
該騒音再合成フィルタに適用されている適応アルゴリズムの更新項において所定のしきい値を用いてクリップ処理を行い、該クリップ処理では、該更新項の大きさが該しきい値より大きいとき、その大きさが該しきい値になるように該更新項を縮小し、該しきい値の大きさに縮小された該更新項に基づいて、該騒音再合成フィルタの該フィルタ係数を更新する、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又は2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 true JP4074656B2 (ja) | 2008-04-09 |
JPWO2006095736A1 JPWO2006095736A1 (ja) | 2008-08-14 |
Family
ID=36953330
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 |
CN102859591B (zh) * | 2010-04-12 | 2015-02-18 | 瑞典爱立信有限公司 | 用于语音编码器中的噪声消除的方法和装置 |
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 |
US10403300B2 (en) | 2016-03-17 | 2019-09-03 | Nuance Communications, Inc. | Spectral estimation of room acoustic parameters |
US10366701B1 (en) * | 2016-08-27 | 2019-07-30 | QoSound, Inc. | Adaptive multi-microphone beamforming |
EP3513570A1 (en) * | 2016-09-16 | 2019-07-24 | Avatronics Sàrl | Active noise cancellation system for headphone |
CN110100457B (zh) | 2016-12-23 | 2021-07-30 | 辛纳普蒂克斯公司 | 基于噪声时变环境的加权预测误差的在线去混响算法 |
US10930298B2 (en) | 2016-12-23 | 2021-02-23 | Synaptics Incorporated | Multiple input multiple output (MIMO) audio signal processing for speech de-reverberation |
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 |
-
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 |
US8180068B2 (en) | 2012-05-15 |
JPWO2006095736A1 (ja) | 2008-08-14 |
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