EP2963950B1 - Compensation de réponse modale - Google Patents
Compensation de réponse modale Download PDFInfo
- Publication number
- EP2963950B1 EP2963950B1 EP15151166.4A EP15151166A EP2963950B1 EP 2963950 B1 EP2963950 B1 EP 2963950B1 EP 15151166 A EP15151166 A EP 15151166A EP 2963950 B1 EP2963950 B1 EP 2963950B1
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- EP
- European Patent Office
- Prior art keywords
- channel signal
- loudspeaker
- modal response
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- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000002596 correlated effect Effects 0.000 claims description 53
- 238000000034 method Methods 0.000 claims description 23
- 230000001131 transforming effect Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 description 14
- 238000005259 measurement Methods 0.000 description 5
- 230000005236 sound signal Effects 0.000 description 4
- 230000001934 delay Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000000205 computational method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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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
- H04S7/301—Automatic calibration of stereophonic sound system, e.g. with test microphone
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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
- H04S7/305—Electronic adaptation of stereophonic audio signals to reverberation of the listening space
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Stereophonic System (AREA)
Claims (14)
- Procédé de compensation de réponse modale d'une salle d'écoute sur une sortie acoustique à partir d'un système audio comprenant au moins un premier et un second haut-parleur, le procédé comprenant :la réception d'un signal d'entrée de canal gauche et d'un signal d'entrée de canal droit ;la transformation dudit signal d'entrée de canal gauche et dudit signal d'entrée de canal droit en un signal de canal central et un signal de canal latéral ;l'application d'un filtre de canal central (Fpos) audit signal de canal central pour fournir un signal de canal central filtré ;l'application d'un filtre de canal latéral (Fneg) audit signal de canal latéral pour fournir un signal de canal latéral filtré ;la retransformation dudit signal de canal central filtré et dudit signal de canal latéral filtré vers une sortie de canal gauche et une sortie de canal droite ;l'application de ladite sortie de canal gauche filtrée sur ledit premier haut-parleur et l'application de ladite sortie de canal droite filtrée sur ledit second haut-parleur ;dans lequel ledit filtre de canal central est créé par :l'application de signaux corrélés auxdits premier et second haut-parleurs,la mesure d'une réponse modale corrélée de ladite salle d'écoute,la création dudit filtre de canal central pour avoir une réponse modale essentiellement égale à un inverse de ladite réponse modale corrélée ; etdans lequel ledit filtre de canal latéral est créé par :l'application de signaux corrélés négativement auxdits premier et second haut-parleurs,la mesure d'une réponse modale corrélée négativement de ladite salle d'écoute, etla création dudit filtre de canal latéral pour avoir une réponse modale essentiellement égale à un inverse de ladite réponse modale corrélée négativement.
- Procédé selon la revendication 1, dans lequel ladite étape de transformation dudit signal de canal gauche et dudit signal de canal droit vers un signal de canal central et un signal de canal latéral est effectuée par un convertisseur L/R vers M/S (13) dans une unité centrale (2) reliée auxdits premier et second haut-parleur.
- Procédé selon la revendication 2, dans lequel ladite étape de retransformation desdits signal de canal central filtré et signal de canal latéral filtré vers une sortie de canal gauche et une sortie de canal droite est effectuée par un/des convertisseur(s) M/S vers R/L (14, 15) dans ladite unité centrale (2).
- Procédé selon la revendication 1, dans lequel ladite étape de transformation desdits signal de canal gauche et signal de canal droit vers un signal de canal central et un signal de canal latéral est effectuée par un convertisseur L/R vers M/S (113a) dans ledit premier haut-parleur et un convertisseur L/R vers M/S (113b) dans ledit second haut-parleur.
- Procédé selon la revendication 4, dans lequel ladite étape de retransformation desdits signal de canal central filtré et signal de canal latéral filtré vers une sortie de canal gauche est effectuée par un convertisseur M/S vers L (114) dans ledit premier haut-parleur, et ladite étape de retransformation dudit signal de canal central filtré et dudit signal de canal latéral filtré vers une sortie de canal droite est effectuée par un convertisseur M/S vers R (115) dans ledit second haut-parleur.
- Procédé selon la revendication 1, dans lequel les étapes de :mesure d'une réponse modale corrélée de ladite salle d'écoute,création dudit filtre de canal central pour avoir une réponse modale essentiellement égale à un inverse de ladite réponse modale corrélée,mesure d'une réponse modale corrélée négativement de ladite salle d'écoute, etcréation dudit filtre de canal central pour avoir une réponse modale essentiellement égale à un inverse de ladite réponse modale corrélée négativement,sont effectuées par un/des microphone(s) (9) et une circuiterie (10) dans une unité centrale (2) reliés auxdits premier et second haut-parleurs (3, 4).
- Procédé selon la revendication 1, dans lequel les étapes de :mesure d'une réponse modale corrélée de ladite salle d'écoute,création d'un filtre de canal central pour avoir une réponse modale essentiellement égale à un inverse de ladite réponse modale corrélée,sont effectuées par des un/des microphone(s) (109a) et une circuiterie (110a) dans ledit ou reliés audit premier haut-parleur (103),et dans lequel les étapes de :mesure d'une réponse modale corrélée négativement de ladite salle d'écoute, etcréation dudit filtre de canal central pour avoir une réponse modale essentiellement égale à un inverse de ladite réponse modale corrélée négativement,sont effectuées par un/des microphone(s) (109b) et une circuiterie (110b) dans ledit ou reliés audit second haut-parleur (104).
- Système audio dans une salle d'écoute, comprenant :un premier et un second haut-parleur (3, 4 ; 103, 104) ;une circuiterie (10) pour appliquer, dans une première séquence, des signaux corrélés vers lesdits premier et second haut-parleurs et, dans une seconde séquence, des signaux corrélés négativement vers lesdits premier et second haut-parleurs,au moins un microphone (109 ; 109a, 109b) pour mesurer, dans ladite première séquence, une réponse modale corrélée de ladite salle d'écoute, et dans ladite seconde séquence, une réponse modale corrélée négativement de ladite salle d'écoute,une circuiterie (10) pour créer un filtre de canal central (Fpos) avec une réponse modale essentiellement égale à un inverse de ladite réponse modale corrélée ; et la création d'un filtre de canal latéral (Fneg) avec une réponse modale essentiellement égale à un inverse de ladite réponse modale corrélée négativement ;un circuit de conversion L/R vers M/S (13 ; 113) pour transformer un signal de canal gauche et un signal de canal droit en un signal de canal central et un signal de canal latéral ;une circuiterie (10 ; 110a, 110b) pour appliquer ledit filtre de canal central audit signal de canal central pour fournir un signal de canal latéral filtré, et pour appliquer un filtre de canal latéral audit signal de canal latéral pour fournir un signal de canal latéral filtré ;une circuiterie de conversion L/R vers M/S (14, 15 ; 114, 115) pour retransformer ledit signal de canal central filtré et ledit signal de canal latéral filtré vers une sortie de canal gauche et une sortie de canal droite,dans lequel ladite sortie de canal gauche filtrée est appliquée audit premier haut-parleur (3 ; 103) et ladite sortie de canal droite filtrée est appliquée audit second haut-parleur (4 ; 104).
- Système audio selon la revendication 8, dans lequel ladite circuiterie de conversion L/R vers M/S (13) est prévue dans une unité centrale (2) reliée audit premier et second haut-parleur (3, 4).
- Système audio selon la revendication 9, dans lequel ladite circuiterie de conversion L/R vers M/S (14, 15) est prévue dans ladite unité centrale (2).
- Système audio selon la revendication 8, dans lequel ladite circuiterie (10) est prévue dans ladite unité centrale (2).
- Système audio selon la revendication 8, dans lequel ladite circuiterie de conversion L/R vers M/S comprend un premier convertisseur L/R vers M/S (113) prévu dans ledit premier haut-parleur (3) et un second convertisseur L/R vers M/S (113) prévu dans ledit second haut-parleur (4).
- Système audio selon la revendication 11, dans lequel ladite circuiterie de conversion L/R vers M/S comprend un convertisseur M/S vers L (114) dans ledit premier haut-parleur et un convertisseur M/S vers R (115) dans ledit second haut-parleur.
- Système audio selon la revendication 8, dans lequel ladite circuiterie (110a, 110b) est prévue dans ledit premier haut-parleur (103) et dans ledit second haut-parleur (104) respectivement.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA201400364 | 2014-07-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2963950A1 EP2963950A1 (fr) | 2016-01-06 |
EP2963950B1 true EP2963950B1 (fr) | 2016-11-23 |
Family
ID=52465172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15151166.4A Active EP2963950B1 (fr) | 2014-07-04 | 2015-01-14 | Compensation de réponse modale |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2963950B1 (fr) |
DK (1) | DK2963950T3 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10715915B2 (en) * | 2018-09-28 | 2020-07-14 | Boomcloud 360, Inc. | Spatial crosstalk processing for stereo signal |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007028094A1 (fr) * | 2005-09-02 | 2007-03-08 | Harman International Industries, Incorporated | Haut-parleur a auto-etalonnage |
DE602006018703D1 (de) * | 2006-04-05 | 2011-01-20 | Harman Becker Automotive Sys | Verfahren zum automatischen Entzerren eines Beschallungssystems |
US9530419B2 (en) * | 2011-05-04 | 2016-12-27 | Nokia Technologies Oy | Encoding of stereophonic signals |
-
2015
- 2015-01-14 EP EP15151166.4A patent/EP2963950B1/fr active Active
- 2015-01-14 DK DK15151166.4T patent/DK2963950T3/en active
Also Published As
Publication number | Publication date |
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DK2963950T3 (en) | 2017-02-20 |
EP2963950A1 (fr) | 2016-01-06 |
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