JP2012147475A - 音識別方法および装置 - Google Patents
音識別方法および装置 Download PDFInfo
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- JP2012147475A JP2012147475A JP2012073301A JP2012073301A JP2012147475A JP 2012147475 A JP2012147475 A JP 2012147475A JP 2012073301 A JP2012073301 A JP 2012073301A JP 2012073301 A JP2012073301 A JP 2012073301A JP 2012147475 A JP2012147475 A JP 2012147475A
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- 238000012850 discrimination method Methods 0.000 title 1
- 238000012545 processing Methods 0.000 claims description 22
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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
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Quality & Reliability (AREA)
- Computational Linguistics (AREA)
- Multimedia (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Circuit For Audible Band Transducer (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
【解決手段】音源を識別する方法は、音響波の特性にそれぞれ応答する少なくとも2つの変換器によって収集されるデータを、それぞれの変換器ロケーションについて信号に変換するステップを含む。変換器は、約70mmより小さいかまたは約90mmより大きい距離だけ分離する。信号は、それぞれの変換器ロケーションについて複数の周波数帯域に分離される。それぞれの帯域について、変換器ロケーションについて信号のマグニチュードの関係についての比較が、閾値を用いて行われる。周波数帯域のマグニチュード関係が閾値の一方の側に入る周波数帯域と、周波数帯域のマグニチュード関係が閾値の他方の側に入る周波数帯域との間に相対的な利得変化がもたらされる。したがって、音源は、変換器からの距離に基づいて互いから識別される。
【選択図】図7
Description
関数X=fft(x)およびx=ifft(x)は、
式中、
ωN=e(-2πi)/N
は1のn乗根である。
sqrt(real(X)2+imag(X)2)
として規定される。
-π≦angle(X)<π
内にあることを可能にする。
11、180、200 マイクロフォンシステム
12、14、64、66、68、182、184、186、188、202、204、206、208 変換器
15 点音源
16、18、70、72、74 前置増幅器
20、76 A/D変換器
22、46、78 ウィンドウ
24、80 FFT
26、32、92、96、100 デバイダ
28、94 dB
30、98 φ
32 τ
34、41 音響変換器
36、38 ユーザ入力
40、198、216 利得
42 マルチプレクサ
44 逆FFT
48 D/A変換器
82 高周波数選択
84 低周波数選択
86 低周波数と高周波数を結合
88 増幅器
90 スピーカ
100 T1 dB
102 T2 dB
108、110、128、130 非線形
116、134、136 加算器
118 0〜5kHzを選択
120 2.5〜5kHzを選択
122 5〜10kHzへシフトアップする
124 10〜20kHzへシフトアップする
126 結合する
150 イヤフォン
152 イヤピース
153 ワイヤ束
154 マイクロフォン
174 携帯電話
176 底面
190 信号プロセッサ
Claims (1)
- マイクロフォンシステムであって、
シリコンチップと、
特性を表すデータをキャプチャするための、音響波の特性に応答する、前記チップに固定された2つのトランスデューサーと、
前記チップに固定された、前記データを処理するための信号プロセッサと、
を具備し、
前記トランスデューサーは、約70mm以下の距離だけ離れており、
前記信号プロセッサは、(a)どのデータが、トランスデューサーから一定の距離より近くに位置する1つまたは複数の音源を表すか、また、(b)どのデータが、トランスデューサーから一定の距離より遠くに位置する1つまたは複数の音源を表すかを判定し、
前記信号プロセッサは、音源が、トランスデューサーからの距離に基づいて互いから識別されるように、前記(a)または(b)の一方の音源を表すデータに対して前記(a)または(b)の他方の音源を表すデータの大きな強調を提供することを特徴とするマイクロフォンシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/766,622 US8767975B2 (en) | 2007-06-21 | 2007-06-21 | Sound discrimination method and apparatus |
US11/766,622 | 2007-06-21 |
Related Parent Applications (1)
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---|---|---|---|
JP2010513294A Division JP4965707B2 (ja) | 2007-06-21 | 2008-05-19 | 音識別方法および装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2012147475A true JP2012147475A (ja) | 2012-08-02 |
JP2012147475A5 JP2012147475A5 (ja) | 2012-11-15 |
JP5654513B2 JP5654513B2 (ja) | 2015-01-14 |
Family
ID=39643839
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JP2010513294A Active JP4965707B2 (ja) | 2007-06-21 | 2008-05-19 | 音識別方法および装置 |
JP2012073301A Expired - Fee Related JP5654513B2 (ja) | 2007-06-21 | 2012-03-28 | 音識別方法および装置 |
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JP2010513294A Active JP4965707B2 (ja) | 2007-06-21 | 2008-05-19 | 音識別方法および装置 |
Country Status (5)
Country | Link |
---|---|
US (2) | US8767975B2 (ja) |
EP (1) | EP2158788A1 (ja) |
JP (2) | JP4965707B2 (ja) |
CN (1) | CN101682809B (ja) |
WO (1) | WO2008156941A1 (ja) |
Cited By (1)
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JP2010530718A (ja) | 2010-09-09 |
WO2008156941A1 (en) | 2008-12-24 |
US20080317260A1 (en) | 2008-12-25 |
CN101682809A (zh) | 2010-03-24 |
EP2158788A1 (en) | 2010-03-03 |
US20140294197A1 (en) | 2014-10-02 |
US8767975B2 (en) | 2014-07-01 |
CN101682809B (zh) | 2013-07-17 |
JP5654513B2 (ja) | 2015-01-14 |
JP4965707B2 (ja) | 2012-07-04 |
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