WO2009044749A1 - 放収音装置 - Google Patents
放収音装置 Download PDFInfo
- Publication number
- WO2009044749A1 WO2009044749A1 PCT/JP2008/067770 JP2008067770W WO2009044749A1 WO 2009044749 A1 WO2009044749 A1 WO 2009044749A1 JP 2008067770 W JP2008067770 W JP 2008067770W WO 2009044749 A1 WO2009044749 A1 WO 2009044749A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power level
- sound
- orientation
- maximum value
- differential signal
- Prior art date
Links
- 238000001514 detection method Methods 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 abstract 1
Classifications
-
- 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
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
- G01S3/802—Systems for determining direction or deviation from predetermined direction
- G01S3/803—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from receiving transducers or transducer systems having differently-oriented directivity characteristics
- G01S3/8034—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from receiving transducers or transducer systems having differently-oriented directivity characteristics wherein the signals are derived simultaneously
- G01S3/8038—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from receiving transducers or transducer systems having differently-oriented directivity characteristics wherein the signals are derived simultaneously derived from different combinations of signals from separate transducers comparing sum with difference
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
スピーカから放音していても収音信号を基にして話者方位を正確に検出することが可能な放収音装置を提供する。マイクロホンユニットMU1~MU8は、スピーカSP1、SP2の配置位置を中心に回転対称となるように形成された収音領域MA1~MA8の音声を収音して合成信号SA1~SA8(以下、SAk)を生成する。対数計算部L1~L8は、合成信号SAkのパワーレベルの対数値Pkを計算する。アンプ部11はパワーレベルの対数値Pkからパワーレベル平均値AVを計算し、減算部はパワーレベルの対数値Pkからパワーレベル平均値AVをそれぞれ差し引いて差分信号レベルDkを生成する。最大値検出部12は、差分信号レベルDkを比較して最大値を検出する。制御部20は、最大値を示した差分信号レベルDkMに対応する収音領域の方位を話者方位として検出する。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200880109914A CN101816190A (zh) | 2007-10-01 | 2008-09-30 | 声音发射和采集装置 |
EP08834939A EP2214420A4 (en) | 2007-10-01 | 2008-09-30 | SOUND TRANSMITTING AND COLLECTING DEVICE |
US12/681,330 US20100226514A1 (en) | 2007-10-01 | 2008-09-30 | Sound emitting and collecting apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-257419 | 2007-10-01 | ||
JP2007257419A JP2009089133A (ja) | 2007-10-01 | 2007-10-01 | 放収音装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009044749A1 true WO2009044749A1 (ja) | 2009-04-09 |
Family
ID=40526176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/067770 WO2009044749A1 (ja) | 2007-10-01 | 2008-09-30 | 放収音装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100226514A1 (ja) |
EP (1) | EP2214420A4 (ja) |
JP (1) | JP2009089133A (ja) |
CN (1) | CN101816190A (ja) |
WO (1) | WO2009044749A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102075833B (zh) * | 2011-01-13 | 2012-12-26 | 深圳市泰金田科技有限公司 | 一片双通道电路实现2.1声道功率放大的方法、电路和装置 |
SE536046C2 (sv) | 2011-01-19 | 2013-04-16 | Limes Audio Ab | Metod och anordning för mikrofonval |
CN103888861B (zh) * | 2012-12-19 | 2017-09-22 | 联想(北京)有限公司 | 麦克风阵列指向性调节方法、装置及电子设备 |
US9692379B2 (en) * | 2012-12-31 | 2017-06-27 | Spreadtrum Communications (Shanghai) Co., Ltd. | Adaptive audio capturing |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS633589A (ja) * | 1986-06-23 | 1988-01-08 | Nippon Telegr & Teleph Corp <Ntt> | テレビ会議システム |
JPH0556426A (ja) * | 1991-08-28 | 1993-03-05 | Fujitsu Ltd | カメラコントロール回路 |
JPH09163334A (ja) * | 1995-12-14 | 1997-06-20 | Fujitsu Ltd | 話者検出回路及びテレビ会議装置 |
JPH10293176A (ja) * | 1997-04-16 | 1998-11-04 | Nec Corp | 目標信号検出方法及び装置 |
JPH1118192A (ja) | 1997-06-23 | 1999-01-22 | Nippon Telegr & Teleph Corp <Ntt> | 収音方法およびその装置 |
JP2003087887A (ja) * | 2001-09-14 | 2003-03-20 | Sony Corp | 音声入出力装置 |
JP2007174155A (ja) * | 2005-12-21 | 2007-07-05 | Yamaha Corp | 拡声システム |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2149680A1 (en) * | 1994-06-30 | 1995-12-31 | John Charles Baumhauer Jr. | Direction finder |
US5625697A (en) * | 1995-05-08 | 1997-04-29 | Lucent Technologies Inc. | Microphone selection process for use in a multiple microphone voice actuated switching system |
GB0121206D0 (en) * | 2001-08-31 | 2001-10-24 | Mitel Knowledge Corp | System and method of indicating and controlling sound pickup direction and location in a teleconferencing system |
US20030059061A1 (en) * | 2001-09-14 | 2003-03-27 | Sony Corporation | Audio input unit, audio input method and audio input and output unit |
-
2007
- 2007-10-01 JP JP2007257419A patent/JP2009089133A/ja not_active Withdrawn
-
2008
- 2008-09-30 CN CN200880109914A patent/CN101816190A/zh active Pending
- 2008-09-30 US US12/681,330 patent/US20100226514A1/en not_active Abandoned
- 2008-09-30 WO PCT/JP2008/067770 patent/WO2009044749A1/ja active Application Filing
- 2008-09-30 EP EP08834939A patent/EP2214420A4/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS633589A (ja) * | 1986-06-23 | 1988-01-08 | Nippon Telegr & Teleph Corp <Ntt> | テレビ会議システム |
JPH0556426A (ja) * | 1991-08-28 | 1993-03-05 | Fujitsu Ltd | カメラコントロール回路 |
JPH09163334A (ja) * | 1995-12-14 | 1997-06-20 | Fujitsu Ltd | 話者検出回路及びテレビ会議装置 |
JPH10293176A (ja) * | 1997-04-16 | 1998-11-04 | Nec Corp | 目標信号検出方法及び装置 |
JPH1118192A (ja) | 1997-06-23 | 1999-01-22 | Nippon Telegr & Teleph Corp <Ntt> | 収音方法およびその装置 |
JP2003087887A (ja) * | 2001-09-14 | 2003-03-20 | Sony Corp | 音声入出力装置 |
JP2007174155A (ja) * | 2005-12-21 | 2007-07-05 | Yamaha Corp | 拡声システム |
Non-Patent Citations (1)
Title |
---|
See also references of EP2214420A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP2009089133A (ja) | 2009-04-23 |
EP2214420A4 (en) | 2011-08-10 |
CN101816190A (zh) | 2010-08-25 |
US20100226514A1 (en) | 2010-09-09 |
EP2214420A1 (en) | 2010-08-04 |
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