JP2015510376A - 組み合わせ又はハイブリッド制御方法を適用する方法 - Google Patents
組み合わせ又はハイブリッド制御方法を適用する方法 Download PDFInfo
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
- H04S2400/11—Positioning of individual sound objects, e.g. moving airplane, within a sound field
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
- H04S2420/11—Application of ambisonics in stereophonic audio systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
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Abstract
Description
・最適化手法、及び
・音場合成方法。
・音圧に関して複数のゾーン間の音響的分離を得るために、複数のゾーンにおいて音響ポテンシャルエネルギーを制御するステップと、
・各ゾーン内で音響ポテンシャルエネルギーを制御するステップを含み、このエネルギーは、あるゾーン内の平均二乗音圧に比例すると見られてもよく、
・位相制御の度合い(程度)を制御するステップを含み、上記位相制御は結果として得られる再生誤差を使用して評価されていてもよいし、再生誤差は明るいゾーンをサンプリングする複数の点で制御してもよい。
− 音圧に関して複数のゾーン間の音響的分離を得るために、複数のゾーンにおける音響ポテンシャルエネルギーを制御するための第1のコスト関数を導出するステップと、
− 複数のゾーンに設けられた音の位相を制御する第2のコスト関数を導出するステップとを備え、
ここで、重みは、組み合わせられた最適化で第1及び第2のコスト関数の組み合わせを決定するために得られる。
− 複数の組み合わせられた最適化から、複数のスピーカのそれぞれを駆動するための複数のパラメータを導出するステップと、
− 上記導出された複数のパラメータに従って、上記複数のスピーカを駆動するステップとを備える。
(1)コントラスト性能のための基礎として、ζが、ACCを使用して達成されたコントラストの0.9倍よりも小さくないコントラストを得るために調整される。
(2)明るいゾーンにおける音場の所望制御を得るためには、αが、8回未満で再生誤差を達成するように調整され、その結果の誤差が圧力マッチング法で見つけられた。
左の列:ACC、コントラストContrast(B,D)=149dB;
中央の列:PM、コントラストContrast(B,D)=62dB、ζ=0;
右の列:ハイブリッド方式、コントラストContrast(B,D)=149dB、ζ=0.02。
ACC及びハイブリッド法は、圧力マッチングと比較してより高いコントラストを提供することは明らかである。
Claims (13)
- 2つ又はそれ以上のサウンドゾーンにおいてマルチチャンネルオーディオ信号の再生のための組み合わせられた制御方法を適用する方法であって、
上記方法は、
音圧に関してゾーン間の音響的分離を得るために、複数のゾーンにおける音響ポテンシャルエネルギーを制御するための第1のコスト関数を導出するステップと、
複数のゾーンに設けられた音波の位相を制御する第2のコスト関数を導出するステップとを備え、
所定の重みが、組み合わせられた最適化で上記第1及び第2のコスト関数を決定するために得られる方法。 - 上記第1のコスト関数は、音響コントラスト制御法のコスト関数である請求項1記載の方法。
- 上記第1のコスト関数は、エネルギー差最大化法のコスト関数である請求項1又は2記載の方法。
- 上記第2のコスト関数は、圧力マッチング法のコスト関数である請求項1〜3のうちのいずれか1つに記載の方法。
- 上記再生誤差は明るいゾーンをサンプリングする複数の点で制御される請求項6記載の方法。
- 上記方法は、圧力マッチング(10)及びエネルギー差最大化(6)からの複数のコスト関数を、組み合わせられた最適化での複数の方法間のトレードオフを制御するための重みを含むただ1つのコスト関数に結合する請求項7記載の方法。
- 上記方法はさらに、
上記組み合わせられた最適化から複数のスピーカのそれぞれを駆動するための複数のパラメータを導出するステップと、
上記導出された複数のパラメータに従って複数のスピーカを駆動するステップとを備える請求項1〜10のうちのいずれか1つに記載の方法。 - 上記重みを決定するステップは、複数のゾーンのうちの予め決められたいずれか1つにおける平面波から所定の最大再生誤差を有するように上記第2のコスト関数を導出するステップを備える請求項1〜11のうちのいずれか1つに記載の方法。
- 上記最大再生誤差は15%である請求項12記載の方法。
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PCT/EP2013/055249 WO2013135819A1 (en) | 2012-03-14 | 2013-03-14 | A method of applying a combined or hybrid sound -field control strategy |
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US (1) | US9392390B2 (ja) |
EP (1) | EP2826264A1 (ja) |
JP (1) | JP6069368B2 (ja) |
KR (1) | KR102024284B1 (ja) |
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WO (1) | WO2013135819A1 (ja) |
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Patent Citations (2)
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JP2005142634A (ja) * | 2003-11-04 | 2005-06-02 | Nippon Telegr & Teleph Corp <Ntt> | 音場制御方法およびこの方法を実施する装置 |
JP2007121439A (ja) * | 2005-10-25 | 2007-05-17 | Toshiba Corp | 音響信号再生装置 |
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JP2017034442A (ja) * | 2015-07-31 | 2017-02-09 | 日本電信電話株式会社 | 音場再生装置およびその方法 |
JP2019507542A (ja) * | 2016-01-27 | 2019-03-14 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | 音場データを処理するための装置および方法 |
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US9392390B2 (en) | 2016-07-12 |
CN104170408A (zh) | 2014-11-26 |
KR102024284B1 (ko) | 2019-09-23 |
KR20140138907A (ko) | 2014-12-04 |
EP2826264A1 (en) | 2015-01-21 |
JP6069368B2 (ja) | 2017-02-01 |
CN104170408B (zh) | 2017-03-15 |
WO2013135819A1 (en) | 2013-09-19 |
US20150043736A1 (en) | 2015-02-12 |
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