JP4955676B2 - 音響ビーム形成装置及び方法 - Google Patents
音響ビーム形成装置及び方法 Download PDFInfo
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- JP4955676B2 JP4955676B2 JP2008520036A JP2008520036A JP4955676B2 JP 4955676 B2 JP4955676 B2 JP 4955676B2 JP 2008520036 A JP2008520036 A JP 2008520036A JP 2008520036 A JP2008520036 A JP 2008520036A JP 4955676 B2 JP4955676 B2 JP 4955676B2
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- 238000000034 method Methods 0.000 title claims description 14
- 230000003044 adaptive effect Effects 0.000 claims abstract description 35
- 230000004044 response Effects 0.000 claims abstract description 33
- 230000008859 change Effects 0.000 claims description 20
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- 238000004891 communication Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims 1
- 230000006978 adaptation Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 description 14
- 230000006870 function Effects 0.000 description 10
- 230000005236 sound signal Effects 0.000 description 10
- 238000013459 approach Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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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
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
- G10K11/341—Circuits therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Circuit For Audible Band Transducer (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
Claims (14)
- 第1音声入力から第1入力信号を生成する手段と、
第2音声入力から第2入力信号を生成する手段と、
合成されたビーム形成信号を生成するため、前記第1及び第2入力信号をフィルタリングするためのビーム形成フィルタを有するビーム形成手段と、
更新基準が満たされる場合、前記ビーム形成フィルタを更新する更新手段と、
第1フィルタ信号を生成するため、前記第1入力信号をフィルタリングする適応的フィルタと、
前記第2入力信号と前記第1フィルタ信号との差分信号を生成する手段と、
前記差分信号を最小化するため、前記適応的フィルタを適応化する手段と、
前記差分信号に応答して、前記更新基準を変更する変更手段と、
を有する音響ビーム形成装置。 - 前記ビーム形成手段は、前記合成されたビーム形成信号に対して、前記第1入力信号と前記第2入力信号の少なくとも1つについてノイズリファレンス信号を生成するよう構成される、請求項1記載の装置。
- 前記更新基準は、前記ビーム形成信号のパワー指標が前記ノイズリファレンス信号に応答して決定された閾値より高いという基準を有する、請求項2記載の装置。
- 前記変更手段は、前記差分信号に応答して前記閾値を変更するよう構成される、請求項3記載の装置。
- 前記更新基準は、前記第1入力信号のパワー指標が前記第2入力信号に応答して決定された閾値より高いという基準を有する、請求項1記載の装置。
- 前記変更手段は、前記差分信号に応答して前記閾値を変更するよう構成される、請求項5記載の装置。
- 前記変更手段は、前記差分信号が閾値以下である場合、前記更新基準を緩和するよう構成される、請求項1記載の装置。
- 前記閾値は、前記合成されたビーム形成信号に対して、前記第1入力信号と前記第2入力信号の少なくとも1つのノイズリファレンス信号に応答して決定される、請求項7記載の装置。
- 前記閾値は、前記第1入力信号に応答して決定される、請求項7記載の装置。
- 前記合成されたビーム形成信号の信頼性の表示を決定する手段をさらに有し、
前記変更手段は、前記差分信号と共に前記信頼性の表示に応答して前記更新基準を変更するよう構成される、請求項1記載の装置。 - 前記変更手段は、前記信頼性の表示が前記差分信号に応答して変更される閾値以下である場合に限って、前記更新基準を変更するよう構成される、請求項10記載の装置。
- 第1音声入力から第1入力信号を生成する手段と、
第2音声入力から第2入力信号を生成する手段と、
合成されたビーム形成信号を生成するため、前記第1及び第2入力信号をフィルタリングするためのビーム形成フィルタを有するビーム形成手段と、
更新基準が満たされる場合、前記ビーム形成フィルタを更新する更新手段と、
第1フィルタ信号を生成するため、前記第1入力信号をフィルタリングする適応的フィルタと、
前記第2入力信号と前記第1フィルタ信号との差分信号を生成する手段と、
前記差分信号を最小化するため、前記適応的フィルタを適応化する手段と、
前記差分信号に応答して、前記更新基準を変更する変更手段と、
を有する通信システムのための通信ユニット。 - 第1音声入力から第1入力信号を生成するステップと、
第2音声入力から第2入力信号を生成するステップと、
合成されたビーム形成信号を生成するため、ビーム形成フィルタが前記第1及び第2入力信号をフィルタリングするステップと、
更新基準が満たされる場合、前記ビーム形成フィルタを更新するステップと、
第1フィルタ信号を生成するため、適応的フィルタが前記第1入力信号をフィルタリングするステップと、
前記第2入力信号と前記第1フィルタ信号との差分信号を生成するステップと、
前記差分信号を最小化するため、前記適応的フィルタを適応化するステップと、
前記差分信号に応答して、前記更新基準を変更するステップと、
を有する方法。 - 請求項13記載の方法をプロセッサに実行させるためのコンピュータプログラム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05106124 | 2005-07-06 | ||
EP05106124.0 | 2005-07-06 | ||
PCT/IB2006/052225 WO2007004188A2 (en) | 2005-07-06 | 2006-07-03 | Apparatus and method for acoustic beamforming |
Publications (2)
Publication Number | Publication Date |
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JP2009500938A JP2009500938A (ja) | 2009-01-08 |
JP4955676B2 true JP4955676B2 (ja) | 2012-06-20 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008520036A Active JP4955676B2 (ja) | 2005-07-06 | 2006-07-03 | 音響ビーム形成装置及び方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US8103023B2 (ja) |
EP (1) | EP1905268B1 (ja) |
JP (1) | JP4955676B2 (ja) |
CN (1) | CN101218848B (ja) |
AT (1) | ATE497327T1 (ja) |
DE (1) | DE602006019872D1 (ja) |
ES (1) | ES2359511T3 (ja) |
WO (1) | WO2007004188A2 (ja) |
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CN101689371B (zh) * | 2007-06-21 | 2013-02-06 | 皇家飞利浦电子股份有限公司 | 处理音频信号的设备和方法 |
US8391523B2 (en) * | 2007-10-16 | 2013-03-05 | Phonak Ag | Method and system for wireless hearing assistance |
TW200826062A (en) * | 2008-01-15 | 2008-06-16 | Asia Vital Components Co Ltd | System of inhibiting broadband noise of communication equipment room |
US8812309B2 (en) * | 2008-03-18 | 2014-08-19 | Qualcomm Incorporated | Methods and apparatus for suppressing ambient noise using multiple audio signals |
US8401178B2 (en) * | 2008-09-30 | 2013-03-19 | Apple Inc. | Multiple microphone switching and configuration |
US8842851B2 (en) * | 2008-12-12 | 2014-09-23 | Broadcom Corporation | Audio source localization system and method |
US9838784B2 (en) | 2009-12-02 | 2017-12-05 | Knowles Electronics, Llc | Directional audio capture |
US8798290B1 (en) | 2010-04-21 | 2014-08-05 | Audience, Inc. | Systems and methods for adaptive signal equalization |
US9558755B1 (en) | 2010-05-20 | 2017-01-31 | Knowles Electronics, Llc | Noise suppression assisted automatic speech recognition |
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US8606249B1 (en) * | 2011-03-07 | 2013-12-10 | Audience, Inc. | Methods and systems for enhancing audio quality during teleconferencing |
CN102347027A (zh) * | 2011-07-07 | 2012-02-08 | 瑞声声学科技(深圳)有限公司 | 双麦克风语音增强装置及其语音增强方法 |
CN102347028A (zh) * | 2011-07-14 | 2012-02-08 | 瑞声声学科技(深圳)有限公司 | 双麦克风语音增强装置及方法 |
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US9640194B1 (en) | 2012-10-04 | 2017-05-02 | Knowles Electronics, Llc | Noise suppression for speech processing based on machine-learning mask estimation |
DE112015003945T5 (de) | 2014-08-28 | 2017-05-11 | Knowles Electronics, Llc | Mehrquellen-Rauschunterdrückung |
CN107112025A (zh) | 2014-09-12 | 2017-08-29 | 美商楼氏电子有限公司 | 用于恢复语音分量的系统和方法 |
DE112016000545B4 (de) | 2015-01-30 | 2019-08-22 | Knowles Electronics, Llc | Kontextabhängiges schalten von mikrofonen |
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CN107785029B (zh) * | 2017-10-23 | 2021-01-29 | 科大讯飞股份有限公司 | 目标语音检测方法及装置 |
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2006
- 2006-07-03 DE DE602006019872T patent/DE602006019872D1/de active Active
- 2006-07-03 JP JP2008520036A patent/JP4955676B2/ja active Active
- 2006-07-03 CN CN200680024834XA patent/CN101218848B/zh active Active
- 2006-07-03 US US11/994,456 patent/US8103023B2/en active Active
- 2006-07-03 AT AT06765985T patent/ATE497327T1/de not_active IP Right Cessation
- 2006-07-03 EP EP06765985A patent/EP1905268B1/en active Active
- 2006-07-03 WO PCT/IB2006/052225 patent/WO2007004188A2/en not_active Application Discontinuation
- 2006-07-03 ES ES06765985T patent/ES2359511T3/es active Active
Also Published As
Publication number | Publication date |
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CN101218848B (zh) | 2011-11-16 |
EP1905268A2 (en) | 2008-04-02 |
ES2359511T3 (es) | 2011-05-24 |
US8103023B2 (en) | 2012-01-24 |
DE602006019872D1 (ja) | 2011-03-10 |
ATE497327T1 (de) | 2011-02-15 |
EP1905268B1 (en) | 2011-01-26 |
WO2007004188A2 (en) | 2007-01-11 |
US20080192955A1 (en) | 2008-08-14 |
JP2009500938A (ja) | 2009-01-08 |
WO2007004188A3 (en) | 2007-05-03 |
CN101218848A (zh) | 2008-07-09 |
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