JP2021189364A - 音信号処理方法、音信号処理装置および音信号処理プログラム - Google Patents
音信号処理方法、音信号処理装置および音信号処理プログラム Download PDFInfo
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- G10K15/00—Acoustics not otherwise provided for
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- G01H7/00—Measuring reverberation time ; room acoustic measurements
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- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
- H04R29/002—Loudspeaker arrays
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
- G10H2210/155—Musical effects
- G10H2210/265—Acoustic effect simulation, i.e. volume, spatial, resonance or reverberation effects added to a musical sound, usually by appropriate filtering or delays
- G10H2210/281—Reverberation or echo
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
- G10H2210/155—Musical effects
- G10H2210/265—Acoustic effect simulation, i.e. volume, spatial, resonance or reverberation effects added to a musical sound, usually by appropriate filtering or delays
- G10H2210/295—Spatial effects, musical uses of multiple audio channels, e.g. stereo
- G10H2210/305—Source positioning in a soundscape, e.g. instrument positioning on a virtual soundstage, stereo panning or related delay or reverberation changes; Changing the stereo width of a musical source
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
- G10H2250/055—Filters for musical processing or musical effects; Filter responses, filter architecture, filter coefficients or control parameters therefor
- G10H2250/111—Impulse response, i.e. filters defined or specified by their temporal impulse response features, e.g. for echo or reverberation applications
- G10H2250/115—FIR impulse, e.g. for echoes or room acoustics, the shape of the impulse response is specified in particular according to delay times
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- H04R2203/00—Details of circuits for transducers, loudspeakers or microphones covered by H04R3/00 but not provided for in any of its subgroups
- H04R2203/12—Beamforming aspects for stereophonic sound reproduction with loudspeaker arrays
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- H—ELECTRICITY
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- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
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- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/30—Control circuits for electronic adaptation of the sound field
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Abstract
Description
スピーカ61A〜スピーカ61Fは、天井に設置されている。スピーカ61A〜スピーカ61Fは、比較的指向性の低いスピーカであり、室62の全体に音を出力する。スピーカ61A〜スピーカ61Fは、残響音を再現した残響音制御信号を出力する。また、スピーカ61A〜スピーカ61Fは、音源の直接音を再現した直接音制御信号を出力する。なお、スピーカの数は、図1に示す数に限らない。
10…音信号処理部
11A,11B,11C…指向性マイク
12A,12B,12C…無指向性マイク
21…音信号取得部
22…ゲイン調整部
23…ミキサ
23M…マトリクスミキサ
24A,24B…FIRフィルタ
25A,25B…レベル設定部
26…出力信号生成部
27…出力部
28…遅延調整部
29…位置情報取得部
31…メモリ
51A〜51J…スピーカ
60…ステージ
61A〜61F…スピーカ
62…室
65…音源
151…インパルス応答取得部
152…レベルバランス調整部
510A〜510J…指向性マイク
620…空間
Claims (15)
- 音源の音信号を取得し、
前記音信号に、前記音源の場所に応じた初期反射音のインパルス応答を畳み込んで初期反射音制御信号を生成し、
前記音信号に、残響音のインパルス応答を畳み込んで残響音制御信号を生成する、
音信号処理方法。 - 前記残響音制御信号は、前記音源の場所に応じた前記残響音のインパルス応答を畳み込んで生成する、
請求項1に記載の音信号処理方法。 - 前記初期反射音および前記残響音のインパルス応答は、それぞれ予め所定の空間で、前記音源の場所毎に測定したインパルス応答である、
請求項1または請求項2に記載の音信号処理方法。 - 前記初期反射音および前記残響音のインパルス応答は、それぞれ予め所定の空間で、前記初期反射音制御信号および前記残響音制御信号を出力するスピーカ毎および前記音源の場所毎に、それぞれ測定する、
請求項3に記載の音信号処理方法。 - 前記初期反射音および前記残響音のインパルス応答は、それぞれ第1インパルス応答および第2インパルス応答を含み、
前記第1インパルス応答から前記第2インパルス応答に切り替える際に、前記第1インパルス応答を畳み込む音信号と、前記第2インパルス応答を畳み込む音信号と、をクロスフェードする、
請求項1乃至請求項4のいずれか1項に記載の音信号処理方法。 - 前記音源の位置情報を取得し、
取得した音源の位置情報に基づいて前記初期反射音制御信号および前記残響音制御信号を生成する、
請求項1乃至請求項5のいずれか1項に記載の音信号処理方法。 - 前記残響音のインパルス応答を畳み込む音信号は、無指向性マイクから取得する、
請求項1乃至請求項6のいずれか1項に記載の音信号処理方法。 - 音源の音信号を取得する音信号取得部と、
前記音信号に、前記音源の場所に応じた初期反射音のインパルス応答を畳み込んで初期反射音制御信号を生成する初期反射音制御信号生成部と、
前記音信号に、残響音のインパルス応答を畳み込んで残響音制御信号を生成する残響音制御信号生成部と、
を備えた音信号処理装置。 - 前記残響音制御信号生成部は、前記音源の場所に応じた前記残響音のインパルス応答を畳み込んで前記残響音制御信号を生成する、
請求項8に記載の音信号処理装置。 - 前記初期反射音および前記残響音のインパルス応答は、それぞれ予め所定の空間で、前記音源の場所毎に測定したインパルス応答である、
請求項8または請求項9に記載の音信号処理装置。 - 前記インパルス応答は、前記初期反射音制御信号および前記残響音制御信号を出力するスピーカ毎および前記音源の場所毎に、それぞれ測定する、
請求項10に記載の音信号処理装置。 - 前記初期反射音および前記残響音のインパルス応答は、それぞれ第1インパルス応答および第2インパルス応答を含み、
前記第1インパルス応答から前記第2インパルス応答に切り替える際に、前記第1インパルス応答を畳み込む音信号と、前記第2インパルス応答を畳み込む音信号と、をクロスフェードするクロスフェード処理部を備えた
請求項8乃至請求項11のいずれか1項に記載の音信号処理装置。 - 前記音源の位置情報を取得する位置情報取得部を備え、
前記初期反射音制御信号生成部および前記残響音制御信号生成部は、取得した音源の位置情報に基づいて前記初期反射音制御信号および前記残響音制御信号を生成する、
請求項8乃至請求項12のいずれか1項に記載の音信号処理装置。 - 前記音信号取得部は、前記残響音のインパルス応答を畳み込む音信号を、無指向性マイクから入力する、
請求項8乃至請求項13のいずれか1項に記載の音信号処理装置。 - 音源の音信号を取得し、
前記音信号に、前記音源の場所に応じた初期反射音のインパルス応答を畳み込んで初期反射音制御信号を生成し、
前記音信号に、残響音のインパルス応答を畳み込んで残響音制御信号を生成する、
処理を音信号処理装置に実行させる音信号処理プログラム。
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CN202110550548.3A CN113766395A (zh) | 2020-06-03 | 2021-05-20 | 音信号处理方法、音信号处理装置及音信号处理程序 |
US17/329,291 US11749254B2 (en) | 2020-06-03 | 2021-05-25 | Sound signal processing method, sound signal processing device, and storage medium that stores sound signal processing program |
EP21177095.3A EP3920176A3 (en) | 2020-06-03 | 2021-06-01 | Sound signal processing method, sound signal processing device, and sound signal processing program |
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JP2737595B2 (ja) | 1993-03-26 | 1998-04-08 | ヤマハ株式会社 | 音場制御装置 |
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