JP6302541B2 - 適応雑音消去システムの係数の動的バイアスを含む適応雑音消去のためのシステム及び方法 - Google Patents
適応雑音消去システムの係数の動的バイアスを含む適応雑音消去のためのシステム及び方法 Download PDFInfo
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- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
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- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
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- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
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- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
- G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
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- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
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- 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
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
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- H—ELECTRICITY
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- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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- H—ELECTRICITY
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- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/033—Headphones for stereophonic communication
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
- G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3026—Feedback
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3028—Filtering, e.g. Kalman filters or special analogue or digital filters
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3048—Pretraining, e.g. to identify transfer functions
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3049—Random noise used, e.g. in model identification
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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
- H04R2410/00—Microphones
- H04R2410/05—Noise reduction with a separate noise microphone
Description
本開示は、2013年4月15日に出願された米国仮特許出願第61/811,915号に対する優先権を主張する2013年7月25日に出願された米国特許出願第13/950,854号に対する優先権を主張し、これらのそれぞれが参照によりその全体において本明細書に組み込まれる。
Claims (24)
- リスナーへの再生のためのソース・オーディオ信号と、トランスデューサの音響出力における周囲のオーディオ音の影響を打ち消すためのアンチノイズ信号との両方を含むオーディオ信号を再現するためのトランスデューサと、
前記周囲のオーディオ音を示すリファレンス・マイクロホン信号を提供するためのリファレンス・マイクロホンと、
前記トランスデューサの前記音響出力と、前記トランスデューサにおける前記周囲のオーディオ音とを示すエラー・マイクロホン信号を提供するための、前記トランスデューサの近傍に位置するエラー・マイクロホンと、
処理回路であって、
前記リスナーに聞こえる前記周囲のオーディオ音の存在を低減させるように、前記リファレンス・マイクロホン信号から前記アンチノイズ信号を生成する応答を有する適応フィルタと、
前記エラー・マイクロホン信号中の前記周囲のオーディオ音を最小化するように、前記適応フィルタの前記応答を適応させることによって、前記エラー・マイクロホン信号及び前記リファレンス・マイクロホン信号に合わせて前記適応フィルタの前記応答を成形する係数制御ブロックと、
前記ソース・オーディオ信号の周波数応答の範囲外の周波数範囲において前記係数制御ブロックの係数をゼロの方にバイアスする係数バイアス制御ブロックと、
を実装する処理回路と、
を備えるパーソナル・オーディオ機器。 - 前記周波数範囲が、前記トランスデューサの周波数応答の範囲内で、かつ、前記周囲のオーディオ音の周波数応答の範囲内である、請求項1に記載のパーソナル・オーディオ機器。
- 前記トランスデューサがステレオ・オーディオ・ヘッドセットと一体である、請求項1に記載のパーソナル・オーディオ機器。
- 前記係数バイアス制御ブロックが、前記ソース・オーディオ信号の周波数コンテンツの上限に基づいて前記周波数範囲の下限を決定するために、前記ソース・オーディオ信号の周波数コンテンツを動的に追跡する、請求項1に記載のパーソナル・オーディオ機器。
- 前記周波数範囲の前記上限が、前記トランスデューサの周波数応答の上限である、請求項4に記載のパーソナル・オーディオ機器。
- 前記係数制御ブロックに、ノイズ信号と組み合わされた前記エラー・マイクロホン信号と、前記ノイズ信号と組み合わされた前記リファレンス・マイクロホン信号とに合わせて、前記適応フィルタの前記応答を成形させることによって、前記係数バイアス制御ブロックが、前記係数制御ブロックの係数をバイアスするように前記周波数範囲内の前記ノイズ信号を前記係数制御ブロックに注入する、請求項1に記載のパーソナル・オーディオ機器。
- 前記係数制御ブロックの係数が最小2乗平均アルゴリズムにより更新する、請求項6に記載のパーソナル・オーディオ機器。
- 前記係数バイアス制御ブロックが、
ホワイト・ノイズ信号を生成するためのノイズ源と、
前記ノイズ信号を生成するために前記周波数範囲内の前記ホワイト・ノイズ信号をフィルタするための帯域通過フィルタと、
を備える、請求項6に記載のパーソナル・オーディオ機器。 - パーソナル・オーディオ機器のトランスデューサの近傍の周囲のオーディオ音を消去するための方法であって、
前記周囲のオーディオ音を示すリファレンス・マイクロホン信号を受信するステップと、
前記トランスデューサの前記出力と、前記トランスデューサにおける前記周囲のオーディオ音とを示すエラー・マイクロホン信号を受信するステップと、
前記エラー・マイクロホン信号中の前記周囲のオーディオ音を最小化するように、前記リファレンス・マイクロホンの出力をフィルタする適応フィルタの応答を適応させることによって、前記トランスデューサの音響出力での周囲のオーディオ音の影響を打ち消すアンチノイズ信号を、前記リファレンス・マイクロホン信号から適応的に生成するステップと、
ソース・オーディオ信号の周波数応答の範囲外の周波数範囲において前記適応フィルタの前記応答を制御するための係数をゼロの方にバイアスするステップと、
前記トランスデューサに提供されるオーディオ信号を生成するように、前記アンチノイズ信号を前記ソース・オーディオ信号と組み合わせるステップと、
を含む方法。 - 前記周波数範囲が、前記トランスデューサの周波数応答の範囲内で、かつ、前記周囲のオーディオ音の周波数応答の範囲内である、請求項9に記載の方法。
- 前記トランスデューサがステレオ・オーディオ・ヘッドセットと一体である、請求項9に記載の方法。
- 前記ソース・オーディオ信号の周波数コンテンツの上限に基づいて前記周波数範囲の下限を決定するために、前記ソース・オーディオ信号の周波数コンテンツを動的に追跡するステップをさらに含む、請求項9に記載の方法。
- 前記周波数範囲の前記上限が、前記トランスデューサの周波数応答の上限である、請求項12に記載の方法。
- ノイズ信号と組み合わされた前記エラー・マイクロホン信号と、前記ノイズ信号と組み合わされた前記リファレンス・マイクロホン信号とに合わせて、前記適応フィルタの前記応答を成形することによって、係数をバイアスするために前記周波数範囲内の前記ノイズ信号を注入するステップをさらに含む、請求項9に記載の方法。
- 係数が最小2乗平均アルゴリズムにより更新する、請求項14に記載の方法。
- ホワイト・ノイズ信号を生成するステップと、
前記ノイズ信号を生成するために前記周波数範囲内の前記ホワイト・ノイズ信号を帯域通過フィルタするステップと、
をさらに含む、請求項14に記載の方法。 - パーソナル・オーディオ機器の少なくとも一部を実装するための集積回路であって、
リスナーへの再生のためのソース・オーディオ信号と、トランスデューサの音響出力における周囲のオーディオ音の影響を打ち消すためのアンチノイズ信号との両方を含む信号をトランスデューサへ提供するための出力部と、
前記周囲のオーディオ音を示すリファレンス・マイクロホン信号を受信するためのリファレンス・マイクロホン入力部と、
前記トランスデューサの前記出力と、前記トランスデューサにおける前記周囲のオーディオ音とを示すエラー・マイクロホン信号を受信するためのエラー・マイクロホン入力部と、
処理回路であって、
前記リスナーに聞こえる前記周囲のオーディオ音の存在を低減させるように、前記リファレンス・マイクロホン信号から前記アンチノイズ信号を生成する応答を有する適応フィルタと、
前記エラー・マイクロホン信号中の前記周囲のオーディオ音を最小化するように、前記適応フィルタの前記応答を適応させることによって、前記エラー・マイクロホン信号及び前記リファレンス・マイクロホン信号に合わせて前記適応フィルタの前記応答を成形する係数制御ブロックと、
前記ソース・オーディオ信号の周波数応答の範囲外の周波数範囲において前記係数制御ブロックの係数をゼロの方にバイアスする係数バイアス制御ブロックと、
を実装する処理回路と、
を備える集積回路。 - 前記周波数範囲が、前記トランスデューサの周波数応答の範囲内で、かつ、前記周囲のオーディオ音の周波数応答の範囲内である、請求項17に記載の集積回路。
- 前記トランスデューサがステレオ・オーディオ・ヘッドセットと一体である、請求項17に記載の集積回路。
- 前記係数バイアス制御ブロックが、前記ソース・オーディオ信号の周波数コンテンツの上限に基づいて前記周波数範囲の下限を決定するために、前記ソース・オーディオ信号の周波数コンテンツを動的に追跡する、請求項17に記載の集積回路。
- 前記周波数範囲の前記上限が、前記トランスデューサの周波数コンテンツの上限である、請求項20に記載の集積回路。
- 前記係数制御ブロックに、ノイズ信号と組み合わされた前記エラー・マイクロホン信号と、前記ノイズ信号と組み合わされた前記リファレンス・マイクロホン信号とに合わせて、前記適応フィルタの前記応答を成形させることによって、前記係数バイアス制御ブロックが、前記係数制御ブロックの係数をバイアスするように前記周波数範囲内の前記ノイズ信号を前記係数制御ブロックに注入する、請求項17に記載の集積回路。
- 前記係数制御ブロックの係数がフィルタードX(Filtered-X)最小2乗平均アルゴリズムにより更新する、請求項22に記載の集積回路。
- 前記係数バイアス制御ブロックが、
ホワイト・ノイズ信号を生成するためのノイズ源と、
前記ノイズ信号を生成するために前記周波数範囲内の前記ホワイト・ノイズ信号をフィルタするための帯域通過フィルタと、
を備える、請求項22に記載の集積回路。
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US13/950,854 | 2013-07-25 | ||
PCT/US2014/017343 WO2014172005A1 (en) | 2013-04-15 | 2014-02-20 | Systems and methods for adaptive noise cancellation including dynamic bias of coefficients of an adaptive noise cancellation system |
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EP2987337B1 (en) | 2023-12-27 |
KR102129717B1 (ko) | 2020-07-08 |
JP6462095B2 (ja) | 2019-01-30 |
CN105284126B (zh) | 2019-06-11 |
KR20150143684A (ko) | 2015-12-23 |
EP2987337A1 (en) | 2016-02-24 |
CN105284126A (zh) | 2016-01-27 |
US20140307899A1 (en) | 2014-10-16 |
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