JPWO2020066542A1 - 音響オブジェクト抽出装置及び音響オブジェクト抽出方法 - Google Patents
音響オブジェクト抽出装置及び音響オブジェクト抽出方法 Download PDFInfo
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- 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
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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
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- 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
- G10K11/343—Circuits therefor using frequency variation or different frequencies
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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
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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
- G10L21/0272—Voice signal separating
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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
- G10L21/0272—Voice signal separating
- G10L21/028—Voice signal separating using properties of sound source
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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
- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04R2430/03—Synergistic effects of band splitting and sub-band processing
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- 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
- H04R2430/23—Direction finding using a sum-delay beam-former
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Abstract
Description
本実施の形態に係るシステム(例えば、音響ナビゲーションシステム)は、少なくとも、音響オブジェクト抽出装置100を備える。
図2は、本実施の形態に係る音響オブジェクト抽出装置100の構成例を示すブロック図である。図2において、音響オブジェクト抽出装置100は、マイクロホンアレイ101−1,101−2と、到来方向推定部102−1,102−2と、ビームフォーミング処理部103−1,103−2と、相関確認部104と、三角測量部105と、共通成分抽出部106と、を含む。
次に、図1に示す共通成分抽出部106の動作の詳細について説明する。
101−1,101−2 マイクロホンアレイ
102−1,102−2 到来方向推定部
103−1,103−2 ビームフォーミング処理部
104 相関確認部
105 三角測量部
106 共通成分抽出部
161−1,161−2 時間−周波数変換部
162−1,162−2 分割部
163 類似度算出部
164 スペクトルゲイン算出部
165−1,165−2 乗算部
166 スペクトル再構成部
167 周波数−時間変換部
Claims (4)
- 第1のマイクロホンアレイに対する音響オブジェクトからの信号の到来方向へのビームフォーミングによって第1の音響信号を生成し、第2のマイクロホンアレイに対する前記音響オブジェクトからの信号の到来方向へのビームフォーミングによって第2の音響信号を生成するビームフォーミング処理回路と、
前記第1の音響信号のスペクトルと前記第2の音響信号のスペクトルとの類似度に基づいて、前記第1の音響信号及び前記第2の音響信号から、前記音響オブジェクトに対応する共通成分を含む信号を抽出する抽出回路と、
を具備し、
前記抽出回路は、前記第1の音響信号及び前記第2の音響信号のスペクトルを複数の周波数区間に分割し、前記周波数区間毎に前記類似度を算出する、
音響オブジェクト抽出装置。 - 隣接する前記周波数区間にそれぞれ含まれる周波数成分の一部が重複する、
請求項1に記載の音響オブジェクト抽出装置。 - 前記抽出回路は、前記類似度に応じた重み付け係数を前記周波数区間毎に算出し、前記重み付け係数を、前記第1の音響信号のスペクトル及び前記第2の音響信号のスペクトルにそれぞれ乗算し、
前記類似度を前記重み付け係数に変換する変換関数の勾配を調整するパラメータは可変である、
請求項1に記載の音響オブジェクト抽出装置。 - 第1のマイクロホンアレイに対する音響オブジェクトからの信号の到来方向へのビームフォーミングによって第1の音響信号を生成し、第2のマイクロホンアレイに対する前記音響オブジェクトからの信号の到来方向へのビームフォーミングによって第2の音響信号を生成し、
前記第1の音響信号のスペクトルと前記第2の音響信号のスペクトルとの類似度に基づいて、前記第1の音響信号及び前記第2の音響信号から、前記音響オブジェクトに対応する共通成分を含む信号を抽出し、
前記第1の音響信号及び前記第2の音響信号のスペクトルは複数の周波数区間に分割され、前記類似度は前記周波数区間毎に算出される、
音響オブジェクト抽出方法。
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PCT/JP2019/035099 WO2020066542A1 (ja) | 2018-09-26 | 2019-09-06 | 音響オブジェクト抽出装置及び音響オブジェクト抽出方法 |
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JP3548706B2 (ja) * | 2000-01-18 | 2004-07-28 | 日本電信電話株式会社 | ゾーン別収音装置 |
JP3879559B2 (ja) | 2002-03-27 | 2007-02-14 | ソニー株式会社 | ステレオマイクロホン装置 |
JP4247037B2 (ja) | 2003-01-29 | 2009-04-02 | 株式会社東芝 | 音声信号処理方法と装置及びプログラム |
JP4473829B2 (ja) | 2006-02-28 | 2010-06-02 | 日本電信電話株式会社 | 収音装置、プログラム及びこれを記録した記録媒体 |
WO2012072787A1 (en) | 2010-12-03 | 2012-06-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for spatially selective sound acquisition by acoustic triangulation |
JP6065030B2 (ja) | 2015-01-05 | 2017-01-25 | 沖電気工業株式会社 | 収音装置、プログラム及び方法 |
JP6540730B2 (ja) | 2017-02-17 | 2019-07-10 | 沖電気工業株式会社 | 収音装置、プログラム及び方法、並びに、判定装置、プログラム及び方法 |
JP6834715B2 (ja) | 2017-04-05 | 2021-02-24 | 富士通株式会社 | 更新処理プログラム、装置、及び方法 |
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US11488573B2 (en) | 2022-11-01 |
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EP3860148B1 (en) | 2023-11-01 |
EP3860148A4 (en) | 2021-11-17 |
JP7405758B2 (ja) | 2023-12-26 |
US20210183356A1 (en) | 2021-06-17 |
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