JP4984683B2 - 放収音装置 - Google Patents
放収音装置 Download PDFInfo
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- JP4984683B2 JP4984683B2 JP2006179792A JP2006179792A JP4984683B2 JP 4984683 B2 JP4984683 B2 JP 4984683B2 JP 2006179792 A JP2006179792 A JP 2006179792A JP 2006179792 A JP2006179792 A JP 2006179792A JP 4984683 B2 JP4984683 B2 JP 4984683B2
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- Prior art keywords
- sound
- signal
- sound collection
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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
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/18—Comparators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
- H04R2201/403—Linear arrays of transducers
-
- 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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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- General Health & Medical Sciences (AREA)
- Circuit For Audible Band Transducer (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
図1は、本実施形態に係る放収音装置1のマイク、スピーカ配置を示す平面図である。
本実施形態の放収音装置1は、筐体101に、複数のスピーカSP1〜SP3、複数のマイクMIC11〜MIC17,MIC21〜MIC27を備えて成る。
収音ビーム選択・補正部19は、信号差分回路191、BPF(バンドパスフィルタ)192、全波整流回路193、ピーク検出回路194、レベル比較器195、信号選択回路196、および減算器199を備える。
図7は、第2の実施形態の収音ビーム選択・補正部19の主要部の構成を示すブロック図である。なお、第2の実施形態の放収音装置は、図4、図5に示した第1の実施形態の放収音装置に対して、収音ビーム選択・補正部19の構成が異なるだけで、他の構成は同じである。したがって、第2の実施形態では、収音ビーム選択・補正部19の異なる部分のみを説明し、他の部分の説明は省略する。
101−筐体
11−入出力コネクタ
12−入出力I/F
13−放音指向性制御部
14−D/Aコンバータ
15−放音用アンプ
16−収音用アンプ
17−A/Dコンバータ
181,182−収音ビーム生成部
19−収音ビーム選択・補正部
20−エコーキャンセル部
201−適応型フィルタ
202−ポストプロセッサ
SP1〜SP3−スピーカ
SPA10−スピーカアレイ
MIC11〜MIC17,MIC21〜MIC27−マイク
MA10,MA20−マイクアレイ
Claims (2)
- 所定基準面に対して対称となる音圧で音声を放音するスピーカと、
前記所定基準面の一方側に沿って一直線上に配列された第1マイクアレイおよび他方側に沿って一直線上に配列された第2マイクアレイと、
前記第1マイクアレイの収音信号に基づく第1収音ビーム群の各収音ビームと、前記第2マイクアレイの収音信号に基づく第2収音ビーム群の各収音ビームと、を前記所定基準面に対して対称に生成する収音ビーム生成手段と、
前記第1収音ビーム群の各収音ビームと、対称に生成した前記第2収音ビーム群の各収音ビームと、の差分信号をそれぞれ生成する差分信号生成手段と、
各差分信号の絶対レベルを比較し、最大レベルの差分信号を選択する信号比較手段と、
前記最大レベルの差分信号の絶対レベルの差分信号を出力する収音ビーム出力手段と、
を備え、
前記収音ビーム生成手段は、収音すべきエリアの方向に仮想収音焦点を設定し、各マイクが収音した音声信号を、前記仮想焦点までの距離が等しくなるようにそれぞれ遅延して合成することにより、前記第1収音ビーム群および第2収音ビーム群の収音ビームを生成するスポット収音モードと、
それぞれのマイクアレイに対して収音すべきエリアと反対の方向に仮想焦点を設定し、各マイクが収音した音声信号を、前記仮想焦点までの距離が等しくなるようにそれぞれ遅延して合成することにより、前記第1収音ビーム群および第2収音ビーム群の収音ビームを生成するエリア収音モードと、のいずれかを実行し、
収音モードの切り換え指示を受け付ける操作手段を備え、
前記収音ビーム生成手段は、前記操作手段の受け付けた切り換え指示に応じて前記スポット収音モードと前記エリア収音モードとを切り替えることを特徴とする放収音装置。 - 前記入力音声信号を適応フィルタで処理した模擬信号を、前記収音ビーム信号出力手段が出力した収音ビーム信号から差分することで、前記スピーカから放音された音声が出力音声信号に含まれないように制御する回帰音除去手段を備えた請求項1に記載の放収音装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006179792A JP4984683B2 (ja) | 2006-06-29 | 2006-06-29 | 放収音装置 |
US12/306,413 US8447590B2 (en) | 2006-06-29 | 2007-06-20 | Voice emitting and collecting device |
EP07767232.7A EP2051542A4 (en) | 2006-06-29 | 2007-06-20 | DEVICE FOR PRODUCING / COLLECTING SOUND |
PCT/JP2007/062393 WO2008001659A1 (fr) | 2006-06-29 | 2007-06-20 | Dispositif d'émission/réception de son |
CN2007800246550A CN101480064B (zh) | 2006-06-29 | 2007-06-20 | 声音发射和采集装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006179792A JP4984683B2 (ja) | 2006-06-29 | 2006-06-29 | 放収音装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008011196A JP2008011196A (ja) | 2008-01-17 |
JP4984683B2 true JP4984683B2 (ja) | 2012-07-25 |
Family
ID=38845426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006179792A Expired - Fee Related JP4984683B2 (ja) | 2006-06-29 | 2006-06-29 | 放収音装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8447590B2 (ja) |
EP (1) | EP2051542A4 (ja) |
JP (1) | JP4984683B2 (ja) |
CN (1) | CN101480064B (ja) |
WO (1) | WO2008001659A1 (ja) |
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2006
- 2006-06-29 JP JP2006179792A patent/JP4984683B2/ja not_active Expired - Fee Related
-
2007
- 2007-06-20 WO PCT/JP2007/062393 patent/WO2008001659A1/ja active Application Filing
- 2007-06-20 CN CN2007800246550A patent/CN101480064B/zh not_active Expired - Fee Related
- 2007-06-20 US US12/306,413 patent/US8447590B2/en active Active
- 2007-06-20 EP EP07767232.7A patent/EP2051542A4/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
EP2051542A4 (en) | 2013-05-22 |
US8447590B2 (en) | 2013-05-21 |
CN101480064A (zh) | 2009-07-08 |
WO2008001659A1 (fr) | 2008-01-03 |
JP2008011196A (ja) | 2008-01-17 |
CN101480064B (zh) | 2012-11-07 |
EP2051542A1 (en) | 2009-04-22 |
US20090248408A1 (en) | 2009-10-01 |
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