EP2161950B1 - Configuration d'un champ sonore - Google Patents

Configuration d'un champ sonore Download PDF

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Publication number
EP2161950B1
EP2161950B1 EP09169687.2A EP09169687A EP2161950B1 EP 2161950 B1 EP2161950 B1 EP 2161950B1 EP 09169687 A EP09169687 A EP 09169687A EP 2161950 B1 EP2161950 B1 EP 2161950B1
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EP
European Patent Office
Prior art keywords
sound
listeners
settings
channel
reconfiguring
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.)
Active
Application number
EP09169687.2A
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German (de)
English (en)
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EP2161950A2 (fr
EP2161950A3 (fr
Inventor
Lars Fredsgaard
Morten Lydolf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harman Becker Gepkocsirendszer Gyarto Kft
Original Assignee
Harman Becker Gepkocsirendszer Gyarto Kft
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Publication of EP2161950A2 publication Critical patent/EP2161950A2/fr
Publication of EP2161950A3 publication Critical patent/EP2161950A3/fr
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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
    • H04R2227/007—Electronic adaptation of audio signals to reverberation of the listening space for PA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
    • 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
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • 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
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • 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
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation
    • H04S7/303—Tracking of listener position or orientation
    • 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

Definitions

  • the present invention relates to a method and system for dynamic reconfiguring an audio reproduction system comprising two or more sound channels.
  • the premises of the reconfiguring are being based on the position of one or more listeners and the one or more sound channels in the reproduction system.
  • the feature obtained is a sound distribution into individual zones of sound fields.
  • the invention includes digital signal processing, sound transducers, filters and amplifier configurations to be applied in surround sound systems and traditional stereophonic system, and to be applied in any domain like a home, in a vehicle, in a boat, in an airplane, in an office or in any other private or public domain, this being airports, shopping centres, sports arenas and theatres, i.e. in a PA system.
  • Document US2004/0240676 A1 describes that a wide frequency range signal from a test sound source is reproduced successively by a plurality of speakers, and the reproduced sound is detected by a plurality of microphones, after which the frequency characteristics thereof are obtained at FFTs, while obtaining the frequency characteristics of the wide frequency range signal at an FFT.
  • a high frequency range level is normalized with a low frequency range level, and a determination section compares the normalized value with a reference value stored in a reference value storage section to determine the number and positions of people in the sound field.
  • the transfer functions between the speakers and the microphones are calculated at transfer function calculators, and impulse responses are obtained at IFFTs, after which a reverberation time calculator calculates the reverberation time based on the impulse responses.
  • An audio signal is adjusted based on the results obtained from the determination section and the reverberation time calculator, whereby it is possibly to optimize the audio reproduction according to changes in the sound field.
  • test signals are generated and received. The received (distorted) signal is then used in order to adjust the output of the of the sound reproduction system (audio tuning system).
  • the individual sound channels incorporating one or more loudspeaker modules must be calibrated and adjusted individually and according to the number of persons in the car, and their position in the space e.g. their seated positions.
  • This principle may be applied in any type of room like airplanes, boats, theatres, arenas, and shopping centres and alike.
  • the invention discloses a surround sound system where different sound settings may be enabled via digital signal processing means controlling the individual sound channels parameters e.g. the equalization (filters), the delay, the gain (amplification).
  • the premise for the control is based upon the listener's position in the listening room/space.
  • the control and sound setting may work in a contextual mode of operation to accommodate for:
  • the invention discloses a solution that in an automatically mode of operation may fulfil the stated requirements and solve the related technical problems.
  • the invention may be implemented in different embodiments.
  • An example not claimed of the reconfiguring procedure may be implemented as:
  • the reconfiguring procedure is implemented as:
  • a method for dynamic and automatic reconfiguring an audio reproduction system comprising two or more sound channels comprises the set of features defined in independent claim 1.
  • the fundamental goal of the invention is to enhance the perceived sound quality seen from a listener prospective. Regardless of the physical position of the loudspeakers, a virtual sound field may be generated and directed so it appears to be anywhere the listener may desire. This is obtained by adjusting the gain, the delay and the equalization parameters of the individual sound channels in a multichannel sound system.
  • the reconfiguring process validates the position of the one or more users, and/or functional premises and/or context related premises and or content related premises as part of the reconfiguring of the one or more sound channels that constitutes the configured loudspeaker system, and where the validation prioritizes the position of one or more listeners.
  • miscellaneous features may be offered and controlled automatically and/or commanded by the user. The features may be used individually and/or mixed in a way that accommodates the user's demands.
  • a predefined combination of sound settings per channel and the functional options supports the processing. Examples of functional options are:
  • the reconfiguring process is provided as one or more algorithms to provide the calculation of each of the values of the sound channel adjustment variables.
  • the reconfiguring process is provided as a table with relations provided to be accessed by the digital signal processor to provide each of the values of the sound channel adjustment with variables.
  • the saved attributes and key parameters are loaded into the reconfiguring means supported by electronic means, means that is connected wirelessly or connected by wire to the audio reproduction system.
  • the reconfiguring process provides the settings of the sound parameters; gain, equalization and delay for one sound channel, to be applied in one sound field zone related to the physical position of first group of people including one or more listeners.
  • the reconfiguring process provides the settings of the sound parameters; gain, equalization and delay for one sound channel, to be applied in one sound field zone related to the physical position of one or more other groups of people including one or more listeners.
  • a listener position is detected via standard sensor means like switches or infrared detectors or strain gauges or temperature sensitive detectors.
  • the configuring process is to be automatically executed and/or controlled by the audio amplifier means, including a digital signal processor, which drives the loudspeaker system.
  • the reconfiguring means is embedded into an audio reproduction system.
  • the reconfiguring is controlled via a table mapping the mode of operation to adjustment parameters for each speaker in every channel or just relevant channels.
  • the adjustment parameters are e.g. but not limited to: equalization, delay and gain.
  • the table may be represented as one or more data set as most appropriate to the digital controller unit.
  • one data set may contain the relations among:
  • Another data set may contain the functional/mode related information like:
  • This table concept is considered to be a data driven control systems, and enables for easy updates of the functional behaviour of a specific system simply by loading alternative data set into the controller.
  • the invention includes a constraint Solver, which comprises a table with digital data representing the constraints of the passenger(s) position(s) and related acoustical adjustment, attributes and corresponding variable values.
  • the constraint solver processing enables an arbitrary access mode to information with no order of sequences required. This is an important advantage over prior art tree-like programming structure, where the starting point is given by the root of the tree. Especially, when finding ways from nodes within the tree-like program to a specific target location in the tree, it may be obscure with regard to which way to chose, whether backwards or forwards, and the final solution may be a new start from the root.
  • the product configuration domain table is organized as relations among variables in the general mathematical notation of 'Disjunctive Form':
  • AttribVariable 1.1 may be defining a passenger seat position, AttribVariable 1.1 a speaker transducer unit, AttribVariable 1.3 a speaker system/subsystem and AttribVariable 1.n gain value for the transducer unit.
  • AttribVariable 2.n may be a reference to another table.
  • multidimensional has to be understood as a contrast to a tree-like programming structure, which is two-dimensional.
  • the product configuration function proceeds by finding the result of the interrogation in the set of allowed and possible combinations in one or more Configuration Constraint Tables. According to definitions made in the configuration constraint tables, the result might be:
  • Alternative configurations may be evaluated by the constraint solver, the alternatives being one or more of the defined set of legal combination in the constraint table.
  • the example illustrates alternative solutions for x, y when y is given: The: If x Then y may be represented as x -> y
  • the x -> y has the legal combinations of x, y: x y 0 0 0 1 1 1
  • Table entries in a constraint table may be combined into legal/illegal combination such that all the well known logical operators known from the Boolean algebra will be included as required.
  • Mode or position Speaker channel # Other e.g. time, content
  • Equalization EQ Delay Gain Driver 1 p-val-d1 q-val-d1 r-val-d1 2 p-val-d2 q-val-d2 r-val-d2 .... .... .... .... n
  • p-val-dn q-val-dn r-val-dn Front 1 p-val-f1 q-val-f1 r-val-f1 2 p-val-f2 q-val- f2 r-val-f2 .... .... .... .... .... .... ....
  • n p-val-an q-val-an r-val-an Movie 1 p-val-m1 q-val-m1 r-val-m1 2 p-val-m2 q-val-m2 r-val-m2 .... .... .... .... n p-val-mn q-val-mn r-val-mn .... ....
  • Other 1 p-val-ol q-val-ol r-val-ol 2 p-val-o2 q-val-o2 r-val-o2 .... .... .... .... ... n p-val-on q-val-on r-val-on
  • the reconfiguring means is embedded into an audio reproduction system as defined in claim 12.
  • the system becomes the controller of the re- configuring process that provides a reconfiguration of the system itself.
  • FIG 1 display components that constitute examples of loudspeaker module configurations related to one sound channel.
  • a loudspeaker transducer unit (1) is the fundamental means that transforms the electrical signal to the sound waves produced by movements of the membrane of the transducer unit. Any standard transducer unit may be applied in the invention.
  • each loudspeaker transducer unit is determined by measurement and/or from specifications delivered by the supplier of the unit.
  • an audio reproduction system comprising active sound transducers including an amplifier (2) is provided for each transducer unit (1).
  • This type of amplifier is e.g. the technology ICEpower from Bang & Olufsen DK.
  • a dedicated filter means, an equalizer, (3) is provided per amplifier (2).
  • the means (3) provides a frequency dependent amplification to control the overall gain, which may be regulated up or down as required.
  • Means for down regulation may be as simple as adjustment of a resistive means serial connected to the loudspeaker module.
  • the sound delay among channels must be controlled.
  • the delay (4) is controlled individually per sound channel.
  • Figure 2 displays the example of an audio reproduction system comprising loudspeaker modules configured in a multi channel concept e.g. a 5.1 surround sound system.
  • a multi channel concept e.g. a 5.1 surround sound system.
  • any number of channels (22) may be handled; having a corresponding table complex related according to the actual functional system requirements.
  • the audio reproduction system may be an audio amplifier (20), including a digital signal processor, for controlling and driving the loudspeaker channels (22), and to provide a signal (21) that's amplified and filtered and delayed accordingly.
  • Input from sensor means (23) determines the mode and functional operation of the control system and may be of a different nature e.g. but not limited to: simple switch, accelerometer, infrared detection, thermal sensing etc.
  • the sensors primarily detects the position of a user in a room/space, the position to be related to the sound field that's relevant for the one or more users /listeners.
  • the detection of a user's position is where the individual user is seated.
  • the detection in this system may be via a simple switch in every seat, or via switches related to the security belts.
  • Additional control signals may be received as user commands (24), e.g. a command to 'enable automatic sound control' and a context related information (25), e.g. information about the time of the day and/or the type of music actual in play.
  • the additional control signal information to be used as input into the digital signal processor to control mode and functional operation of the sound system.
  • the reconfigure means is imbedded into the controller of the audio sound system.
  • the audio sound system is the master having the digital signal processor means (20) that initiates, controls and applies the reconfiguring process.
  • Alternative table definitions may be loaded into the digital signal processor (20) from external means e.g. a laptop/PC (26).
  • the invention may be applied in relation to automatically adjusting an audio sound system to a maximum level of quality taking into account the position of individual listeners in dedicated zone of sound fields.
  • the invention includes sound channel configurations to be applied in surround sound systems and traditional stereophonic system, and to be applied in any domain like a home, in a vehicle, in an airplane in a boat, in an office or in any other public domain and alike.

Claims (12)

  1. Procédé de reconfiguration dynamique et automatique d'un système de reproduction audio comprenant deux canaux sonores ou plus, dans lequel chaque canal sonore comprend un transducteur de haut-parleur, et dans lequel la reconfiguration comporte les étapes :
    • de détermination de la position physique d'un ou de plusieurs auditeurs,
    • de fourniture de la position physique en tant qu'information au système de reproduction audio afin de sélectionner un ensemble de paramètres sonores prédéfinis ou calculés, l'ensemble de paramètres sonores servant à inclure des réglages pour l'égalisation, le gain et le retard par canal sonore et/ou par transducteur de haut-parleur,
    • à l'aide d'un résolveur de contrainte, de sélection d'un ou de plusieurs ensembles légaux parmi des ensembles légaux définis de paramètres sonores prédéfinis dans une table de contrainte, dans lequel la table de contrainte est configurée en tant qu'espace d'état multidimensionnel, définissant des relations entre des variables soit sous forme disjonctive soit sous forme conjonctive, sur la base des informations fournies au système de reproduction audio, et
    • de fourniture des un ou plusieurs ensembles légaux sélectionnés de paramètres sonores au canal sonore respectif et/ou par transducteur de haut-parleur en conséquence.
  2. Procédé selon la revendication 1, dans lequel l'étape de sélection d'un ensemble de paramètres sonores prédéfinis comprend l'application d'informations commandées par l'utilisateur.
  3. Procédé selon la revendication 1 ou 2, dans lequel le processus de reconfiguration valide la position des un ou plusieurs auditeurs dans le cadre de la reconfiguration du système de reproduction audio.
  4. Procédé selon une quelconque revendication précédente, dans lequel le processus de reconfiguration fournit les réglages de gain, d'égalisation et de retard des paramètres sonores pour un canal sonore à appliquer dans une zone de champ sonore liée à la position physique d'un premier sous-ensemble des un ou plusieurs auditeurs.
  5. Procédé selon la revendication 4, dans lequel le processus de reconfiguration fournit les réglages de gain, d'égalisation et de retard des paramètres sonores pour un canal sonore à appliquer dans une zone de champ sonore liée à la position physique d'un ou de plusieurs seconds sous-ensembles des un ou plusieurs auditeurs.
  6. Procédé selon la revendication 1, dans lequel la position physique des un ou plusieurs auditeurs est détectée par l'intermédiaire de moyens de détection.
  7. Procédé selon la revendication 6, dans lequel les moyens de détection comprennent au moins l'un de détecteurs à infrarouge, d'extensomètres et de détecteurs sensibles à la température.
  8. Procédé selon la revendication 3, dans lequel les un ou plusieurs auditeurs sont des passagers dans un véhicule, et dans lequel la table de contrainte comprend des données numériques représentant les contraintes d'au moins l'un
    1) de la position physique des un ou plusieurs auditeurs, et d'un ajustement acoustique associé, d'attributs et de valeurs variables associées correspondantes,
    2) de la position physique des un ou plusieurs auditeurs, du numéro de canal de haut-parleur, de réglages de paramètre d'égalisation, de retard et de gain, et
    3) de réglages fonctionnels.
  9. Procédé selon la revendication 8, dans lequel les réglages fonctionnels comprennent au moins l'un d'un film, audio uniquement, d'un numéro de canal de haut-parleur et de réglages de paramètre.
  10. Procédé selon la revendication 9, dans lequel les réglages de paramètre des réglages fonctionnels comprennent au moins l'un d'une égalisation, d'un retard et d'un gain.
  11. Procédé selon une quelconque revendication précédente, dans lequel le processus de reconfiguration est configuré pour prendre en compte une combinaison prédéfinie de réglages sonores par canal sonore et au moins une option fonctionnelle, dans lequel l'au moins une option fonctionnelle inclut au moins l'un
    d'une priorité de siège ;
    d'une priorité de zone ;
    d'une priorité de mode ;
    d'un mode de canal ;
    d'un nombre d'auditeurs dans une zone ; et
    d'un temps de l'événement.
  12. Système sonore audio comprenant
    • des moyens de reconfiguration pour mettre en oeuvre le procédé selon l'une quelconque des revendications 1 à 11, et
    • un système de reproduction audio comprenant deux canaux sonores ou plus, chaque canal comprenant un transducteur de haut-parleur, et des moyens individuels pour l'égalisation et l'amplification, le système de reproduction audio constituant un équipement de reproduction audio dans une pièce, dans un véhicule, dans un avion, dans un bateau, dans un système PA,
    dans lequel les moyens de reconfiguration sont configurés pour appliquer la reconfiguration automatique sur le système de reproduction audio.
EP09169687.2A 2008-09-08 2009-09-08 Configuration d'un champ sonore Active EP2161950B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA200801258 2008-09-08
DKPA200801317 2008-09-22
DKPA200900336 2009-03-11

Publications (3)

Publication Number Publication Date
EP2161950A2 EP2161950A2 (fr) 2010-03-10
EP2161950A3 EP2161950A3 (fr) 2012-05-09
EP2161950B1 true EP2161950B1 (fr) 2019-01-23

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EP09169687.2A Active EP2161950B1 (fr) 2008-09-08 2009-09-08 Configuration d'un champ sonore

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