EP3603107B1 - Procédé pour émettre un signal audio dans un espace intérieur par l'intermédiaire d'un dispositif d'émission comprenant un canal d'émission gauche et droite - Google Patents

Procédé pour émettre un signal audio dans un espace intérieur par l'intermédiaire d'un dispositif d'émission comprenant un canal d'émission gauche et droite Download PDF

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Publication number
EP3603107B1
EP3603107B1 EP18711538.1A EP18711538A EP3603107B1 EP 3603107 B1 EP3603107 B1 EP 3603107B1 EP 18711538 A EP18711538 A EP 18711538A EP 3603107 B1 EP3603107 B1 EP 3603107B1
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Prior art keywords
audio signal
output
signal component
acoustic
acoustic output
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EP18711538.1A
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German (de)
English (en)
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EP3603107A1 (fr
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Daniel Kotulla
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Ask Industries GmbH
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Ask Industries GmbH
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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
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/007—Two-channel systems in which the audio signals are in digital form
    • 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
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • 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
    • H04S2400/05—Generation or adaptation of centre channel in multi-channel audio systems

Definitions

  • the invention relates to a method for outputting an audio signal into an interior forming part of a passenger compartment of a motor vehicle via an acoustic output device comprising a left and a right acoustic output channel.
  • acoustic output devices which include a large number of acoustic output channels arranged distributed in the passenger compartment.
  • driver-side i. H. typically a left, output channel
  • passenger-side i. H. typically there is a right hand output port and a center output port located midway between the driver and passenger side output ports.
  • the center output channel is used to ensure the best possible stereo width outside of the vehicle's longitudinal center line. If there is no center output channel, the center portion of an audio signal perceived by the listener "migrates" to the nearest output channel on the driver's or passenger's side.
  • WO 87/06090 A1 describes a principle for signal processing of a stereo signal with the aim of expanding the "width" of the stereo signal.
  • WO 03/094369 A2 discloses an automotive audio system in which at least three speakers: one to the right, one to the left and one centered to the passenger compartment are driven.
  • the invention is therefore based on the object of providing a method for outputting an audio signal into a part of a passenger compartment of a motor vehicle to specify forming interior over a left and a right acoustic output channel comprehensive acoustic output device, which allows an output of an audio signal with the best possible stereo width without using a center output channel.
  • the method described herein is used to output an audio signal into an interior that forms part of a passenger compartment of a motor vehicle via an acoustic output device (“output device”) comprising a left and a right acoustic output channel—a respective output channel is typically formed by a loudspeaker.
  • the output device is typically built into the motor vehicle.
  • the two output channels of the output device are typically arranged in a passenger compartment of a motor vehicle, so that the signals that can be output via them can be output into the passenger compartment.
  • the aim of the method is to transmit an audio signal via only two output channels, i. H. a right and a left output channel and no center output channel, to be able to output a comprehensive output device with the best possible stereo width.
  • a virtual center output channel can be generated in this way.
  • an acoustic audio signal (“audio signal”) is provided.
  • the audio signal is typically a stereo signal.
  • the audio signal can be provided in different ways. For example, the audio signal on a sound carrier, i. H. e.g. B. a CD, a data carrier, d. H. e.g. B. a hard disk storage, or a data network, d. H. e.g. B. the Internet can be provided.
  • the audio signal can be z. B. a piece of music, a piece of text, etc. act.
  • the provided audio signal is divided into several, ie, as follows, in particular three, direction-of-perception-dependent audio signal components (“audio signal component”).
  • audio signal component the audio signal is transmitted via suitable Examination devices or algorithms are examined with regard to individual audio signal components which, when the audio signal is actually output via an output device comprising only two output channels, i.e. a left and a right output channel, are positioned from one in a defined position relative to the output device outputting the respective audio signal Listener perceived output direction or position correspond or would correspond.
  • a listener relative to an output device that outputs the audio signal it can be z.
  • a corresponding audio signal component can be a center audio signal component, which would correspond to an output direction or position perceived by a listener in the middle when the audio signal is actually output via an output device comprising two output channels, a left audio signal component, which one of a listener when the audio signal is actually output via an output device comprising two output channels (more) would correspond to the output direction or position perceived on the left (compared to a center audio signal component), and a right audio signal component, which corresponds to an output device comprising two output channels (more ) would correspond to the perceived output direction or position to the right (compared to a center audio signal component).
  • the division of the audio signal carried out by means of suitable division devices or algorithms typically (precisely) delivers three audio signal components; Consequently, according to the method, the audio signal is typically divided into (precisely) three audio signal components, namely a left audio signal component which contains all or only components of the audio signal which are perceived to the left of the center of the output or which are to the left of the center of the output, a right audio signal component , which contains all or only portions of the audio signal that are perceived to the right of the center of the output or that are located to the right of the center of the output, and a center audio signal portion, which contains all or only parts of the audio signal which are perceived in the center of the output or which are in the center of the output.
  • a left audio signal component which contains all or only components of the audio signal which are perceived to the left of the center of the output or which are to the left of the center of the output
  • a right audio signal component which contains all or only portions of the audio signal that are perceived to the right of the center of the output or
  • audio signal components are mixed onto the right and/or the left output channel of an output device comprising a right and a left output channel.
  • Each audio signal component obtained from the division of the audio signal is therefore mixed down to a specific output channel of an output device comprising two output channels.
  • each audio signal component is assigned to one of the two output channels of the output device, via which the respective audio signal component is subsequently output. For the center audio signal portion, this can also be mixed proportionally to both output channels.
  • the audio signal components are output via the two output channels of the output device.
  • the output takes place in an interior forming part of a passenger compartment of a motor vehicle—enables the best possible stereo width without the need for a (separate) center output channel.
  • the audio signal provided can be divided into respective audio signal components by means of a source separation device.
  • a corresponding source separation device can e.g. B. be implemented by a source separation algorithm.
  • a suitable method for source separation or a suitable source separation algorithm is e.g. B. in the German patent DE 10 2012 025 016 B3 described, the disclosure content of which is expressly referred to.
  • the provided audio signal is typically divided into a left audio signal component, a right audio signal component and a center audio signal component.
  • the left audio signal portion is typically output via the left output channel of the output device
  • the right Audio signal portion is typically output via the right output channel of the output device
  • center audio signal portion is typically output via the left and/or right output channel of the output device. Accordingly, the center audio signal component can be output both via the right and via the left output channel of the output device.
  • the center audio signal portion is shared across both output channels.
  • a first portion of the center audio signal portion determined by a weighting factor
  • a second portion of the center audio signal portion determined by a weighting factor
  • a first portion of the center audio signal portion is mixed with the right audio signal portion and output via the right output channel
  • a second portion of the center audio signal portion is mixed with the left audio signal portion and output via the left output channel of the output device.
  • the components of the center audio signal component can be weighted evenly or unevenly; consequently, a first portion of the center audio signal portion can be greater than a second portion of the center audio signal portion, or vice versa.
  • a dynamic (variable) weighting factor is used.
  • the weighting factor is varied depending on definable or defined boundary conditions. Furthermore, the weighting factor is varied as a function of specific boundary conditions relating to the occupancy of the passenger compartment with vehicle occupants.
  • a weighting of the center audio signal content can therefore take place as a function of the distribution of the respective vehicle occupants located within the passenger compartment. If the majority of the vehicle occupants are on the driver's side, the center audio signal component can e.g. B. are output with a higher weighting on the respective driver-side output channel, is the majority of vehicle occupants on the passenger side, the center audio signal component z. B. with be output with a higher weighting via the respective output channel on the passenger side.
  • the invention relates to a device for outputting an audio signal according to claim 4 into an interior forming part of a passenger compartment of a motor vehicle via an acoustic output device comprising a left and a right acoustic output channel.
  • the device is characterized by a hardware and/or software implemented splitting device, which is set up for splitting a provided audio signal into several audio signal components, a hardware and/or software implemented mixing device, which for mixing each audio signal component onto a right or a left output channel of a an output device comprising a right and a left output channel, and an output device comprising two output channels, which is set up to output the audio signal components via the right and/or left output channel.
  • the device is set up to carry out the method. Consequently, all statements in connection with the method described herein apply analogously to the device.
  • the invention also relates to a motor vehicle which includes a corresponding device. Consequently, all statements in connection with the method described herein apply analogously to the motor vehicle.
  • the only figure shows a schematic representation of a device 1 according to an exemplary embodiment.
  • the device 1 is set up for outputting an audio signal into an interior 4 forming part of a passenger compartment 2 of a motor vehicle 3 via an acoustic output device 7 comprising a left and a right acoustic output channel 5 , 6 .
  • the device 1 comprises as functional components a distribution device 8 implemented in hardware and/or software, a mixing device 9 implemented in hardware and/or software, and the output device 7 comprising a left and a right output channel 5, 6 (loudspeakers). Division of a provided audio signal S, d. H. e.g. B. a piece of music, in several audio signal components S.1 - S.3 set up.
  • the mixing device 9 is set up for mixing an audio signal component S.1-S.3 onto an output channel 5, 6 of the output device 7.
  • the functional interaction of the named functional components of the device 1 is described in more detail in connection with the following explanation of the method that can be implemented with the device 1 for outputting an audio signal into the interior 4 of the motor vehicle 3 that forms part of the passenger compartment 2 .
  • the device 1 is therefore set up to carry out a method for outputting an audio signal S into an interior 4 forming part of a passenger compartment 2 of a motor vehicle 3 via an output device 7 comprising a left and a right output channel 5, 6.
  • the aim of the method is to transmit an audio signal S via only two output channels 5, 6, d. H. a right and a left output channel and no center output channel, to be able to output comprehensive output device 7 with the best possible stereo width.
  • an audio signal S is provided.
  • the audio signal S is typically a stereo signal.
  • the audio signal S can be provided in various ways. For example, the audio signal S via a sound carrier, i. H. e.g. B. a CD, a data carrier, d. H. e.g. B. a hard disk storage, or a data network, d. H. e.g. B. the Internet can be provided.
  • the audio signal S can be z. B. be a recording of a piece of music, a piece of text, etc. act.
  • the provided audio signal S is divided by means of the splitting device 8 into three audio signal components S.1-S.3, which are dependent on the direction of perception.
  • the audio signal S is assigned or assigned by means of the splitting device 8 Investigation algorithms are examined with regard to individual audio signal components S.1 - S.3 which, when the audio signal S is actually output via an output device comprising two output channels, i.e. a left and a right output channel, correspond to an output direction or position perceived by a listener or would correspond.
  • the actual division of the audio signal S into the audio signal components S.1 - S.3 takes place via a source separation device 10 associated with the division device 8 and comprising one or more source separation algorithms.
  • the audio signal S is divided into a left audio signal component S.1, a center audio signal component S.2, and a right audio signal component S.3.
  • the center audio signal component S.2 corresponds to an output direction or position perceived in the center by a listener when the audio signal S is actually output via an output device comprising two output channels.
  • the left audio signal component S.1 corresponds to an output direction or position perceived by a listener when the audio signal S is actually output via an output device comprising two output channels (more) to the left (compared to a center audio signal component).
  • the right audio signal component S.3 corresponds to an output direction or position perceived by a listener when the audio signal S is actually output via an output device comprising two output channels (more) to the right (compared to a center audio signal component).
  • the splitting up of the audio signal S thus provides (precisely) three audio signal components, namely a left audio signal component S.1, which contains all or only components of the audio signal S which are perceived to the left of the center of the output or which are to the left of the center of the output are located, a right audio signal component S.3, which contains all or only portions of the audio signal S, which are perceived to the right of the center of the output or which are to the right of the center of the output, and a center audio signal component S.2, which all or contains only portions of the audio signal S which are perceived in the center of the output or which are in the center of the output.
  • a left audio signal component S.1 which contains all or only components of the audio signal S which are perceived to the left of the center of the output or which are to the left of the center of the output are located
  • a right audio signal component S.3 which contains all or only portions of the audio signal S, which are perceived to the right of the center of the output or which are to the right of the center of the output
  • the audio signal components S.1-S.3 are mixed to the right and/or the left output channel 5, 6 of the output device 7 by means of the mixing device 9.
  • Each audio signal component S.1-S.3 is therefore mixed onto a specific output channel 5, 6 of the output device. It applies to the center audio signal component S.2 that it can also be mixed proportionally to both output channels 5, 6.
  • the audio signal components S.1 - S.3 are output via the two output channels 5, 6 of the output device 7.
  • the left audio signal component S.1 is output via the left output channel 5 of the output device 7
  • the right audio signal component S .3 is output via the right output channel 6 of the output device 7
  • the center audio signal component S.2 is output via the left and/or the right output channel 5, 6 of the output device 7.
  • the center audio signal component is mixed proportionally divided over the two output channels 5, 6 and thus distributed proportionally over the two output channels 5, 6.
  • a first component S.2.1 of the center audio signal component S.2 determined by a weighting factor G is output via the left output channel 5 of the output device 7 and a second component S.2.2 of the center audio signal component S.2 determined by a weighting factor G is output via the right output channel 6 of the output device 7 output.
  • the first component S.2.1 of the center audio signal component S.2 is therefore output mixed with the left audio signal component S.1 via the left output channel 5 and the second component S.2.2 of the center audio signal component S.2 with the right audio signal component S.3 mixed and output via the right-hand output channel 6 of the output device 7.
  • the proportions S.2.1, S.2.2 of the center audio signal proportion S.2 can be weighted evenly or unevenly; consequently, a first component S.2.1 of the center audio signal component S.2 be larger than a second portion S.2.2 of the center audio signal portion S.2, or vice versa.
  • a dynamic (variable) weighting factor G is used.
  • the weighting factor G is varied depending on definable or defined boundary conditions. Furthermore, the weighting factor G is varied as a function of certain boundary conditions relating to the occupancy of the passenger compartment 2 with vehicle occupants.
  • the center audio signal component S.2 can therefore be weighted as a function of the distribution of vehicle occupants located within the passenger cell 2 . If the majority of the vehicle occupants are on the driver's side, the center audio signal component S.2 can e.g. B. are output with a higher weighting on the respective driver-side output channel 5, 6, is the majority of vehicle occupants on the passenger side, the center audio signal portion S.2 z. B. are output with a higher weighting on the respective passenger-side output channel 5, 6.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Stereophonic System (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Claims (5)

  1. Procédé d'émission d'un signal audio (S) dans un espace intérieur (4) formant un habitacle (2) d'un véhicule à moteur (3) par l'intermédiaire d'un dispositif d'émission (7) acoustique comprenant un canal d'émission acoustique à gauche et à droite (5, 6), comprenant les étapes :
    - de fourniture d'un signal audio (S),
    - de séparation du signal audio (S) fourni en plusieurs parties de signal audio (S.1 - S.3) acoustiques dépendant de la direction de perception, dans lequel le signal audio (S) fourni est séparé en une partie de signal audio centrale (S.3), une partie de signal audio gauche (S.1) perçue à gauche de la partie de signal audio centrale (S.3) et en une partie de signal audio droite (S.3) perçue à droite de la partie de signal audio centrale (S.3),
    - de mixage de chaque partie de signal audio (S.1 - S.3) acoustique dépendant de la direction de perception sur un canal d'émission à droite et/ou un canal d'émission à gauche (5, 6) d'un dispositif d'émission (7) acoustique comprenant un canal d'émission à droite et un canal d'émission acoustique à gauche (5, 6),
    - d'émission des parties de signal audio (S.1 - S.3) acoustiques dépendant de la direction de perception par l'intermédiaire du canal d'émission acoustique à droite et/ou à gauche (5, 6) du dispositif d'émission (7) acoustique,
    dans lequel la partie de signal audio gauche (S.1) est émise par l'intermédiaire du canal d'émission acoustique à gauche (5) du dispositif d'émission (7) acoustique, la partie de signal audio droite (S.3) est émise par l'intermédiaire du canal d'émission acoustique à droite (6) du dispositif d'émission (7) acoustique, et la partie de signal audio centrale (S.2) est émise par l'intermédiaire du canal d'émission à gauche et/ou à droite (5, 6) du dispositif d'émission (7),
    dans lequel la partie de signal audio centrale (S.3) est émise à la fois par l'intermédiaire du canal d'émission acoustique à droite et par l'intermédiaire du canal d'émission acoustique à gauche (5, 6) du dispositif d'émission (7) acoustique,
    dans lequel une première partie (S.2.1), définie par un facteur de pondération (G), de la partie de signal audio centrale (S.2) est émise par l'intermédiaire du canal d'émission acoustique à gauche (5) du dispositif d'émission (7) acoustique, et une deuxième partie (S.2.2), définie par le facteur de pondération (G), de la partie de signal audio centrale (S.2) est émise par l'intermédiaire du canal d'émission acoustique à droite (6) du dispositif d'émission (7) acoustique, dans lequel le facteur de pondération (G) varie en fonction de conditions marginales pouvant être définies ou définies,
    caractérisé en ce que
    le facteur de pondération (G) varie en fonction de conditions marginales données concernant l'occupation d'un habitacle (2) par des passagers de véhicule.
  2. Procédé selon la revendication 1 ou 2, caractérisé en ce que la séparation du signal audio (S) fourni en plusieurs parties de signal audio (S.1 - S.3) acoustiques dépendant de la direction de perception est mise en oeuvre au moyen d'un dispositif de séparation de sources (10).
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le signal audio (S) est un signal stéréo.
  4. Appareil (1) pour émettre un signal audio (S) dans un espace intérieur (4) formant un habitacle (2) d'un véhicule à moteur (3) par l'intermédiaire d'un dispositif d'émission (7) acoustique comprenant un canal d'émission acoustique à gauche et à droite (5, 6), dans lequel le dispositif est mis au point pour mettre en oeuvre un procédé selon l'une quelconque des revendications précédentes, l'appareil comprenant :
    - un dispositif de séparation (8), lequel est mis au point pour séparer le signal audio (S) fourni en plusieurs parties de signal audio (S.1 - S.3) acoustiques dépendant de la direction de perception, dans lequel le signal audio (S) fourni est séparé en une partie de signal audio centrale (S.3), une partie de signal audio gauche (S.1) perçue à gauche de la partie de signal audio centrale (S.3) et en une partie de signal audio droite (S.3) perçue à droite de la partie de signal audio centrale (S.3) ;
    - un dispositif de mixage (9), lequel est mis au point pour mixer chaque partie de signal audio (S.1 - S.3) acoustique dépendant de la direction de perception sur un canal d'émission à droite ou à gauche (5, 6) d'un dispositif d'émission (7) acoustique comprenant un canal d'émission acoustique à droite et à gauche (5, 6),
    - un dispositif d'émission (7) acoustique comprenant deux canaux d'émission acoustiques (5, 6), lequel est mis au point pour émettre les parties de signal audio (S.1 - S.3) acoustiques dépendant de la direction de perception par l'intermédiaire du canal d'émission acoustique à droite et/ou à gauche (5, 6) du dispositif d'émission (7) acoustique.
  5. Véhicule à moteur (3) comprenant un appareil (1) selon la revendication 4.
EP18711538.1A 2017-03-21 2018-03-14 Procédé pour émettre un signal audio dans un espace intérieur par l'intermédiaire d'un dispositif d'émission comprenant un canal d'émission gauche et droite Active EP3603107B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017106022.7A DE102017106022A1 (de) 2017-03-21 2017-03-21 Verfahren zur Ausgabe eines Audiosignals in einen Innenraum über eine einen linken und einen rechten Ausgabekanal umfassende Ausgabeeinrichtung
PCT/EP2018/056404 WO2018172159A1 (fr) 2017-03-21 2018-03-14 Procédé pour émettre un signal audio dans un espace intérieur par l'intermédiaire d'un dispositif d'émission comprenant un canal d'émission gauche et droite

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EP3603107A1 EP3603107A1 (fr) 2020-02-05
EP3603107B1 true EP3603107B1 (fr) 2023-07-12

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US (1) US11153686B2 (fr)
EP (1) EP3603107B1 (fr)
CN (1) CN110463224A (fr)
DE (1) DE102017106022A1 (fr)
WO (1) WO2018172159A1 (fr)

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DE102017106022A1 (de) 2018-09-27
US11153686B2 (en) 2021-10-19
EP3603107A1 (fr) 2020-02-05
CN110463224A (zh) 2019-11-15
US20200137496A1 (en) 2020-04-30

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