EP3603118B1 - Procédé et dispositif pour produire et émettre un signal acoustique multicanal - Google Patents

Procédé et dispositif pour produire et émettre un signal acoustique multicanal Download PDF

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EP3603118B1
EP3603118B1 EP18711933.4A EP18711933A EP3603118B1 EP 3603118 B1 EP3603118 B1 EP 3603118B1 EP 18711933 A EP18711933 A EP 18711933A EP 3603118 B1 EP3603118 B1 EP 3603118B1
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output
signal
dependent
acoustic
channel
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German (de)
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EP3603118A1 (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
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • 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
    • 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 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • 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
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/01—Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
    • 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
    • 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 invention relates to a method and a device for generating and outputting an acoustic multi-channel signal.
  • surround signals i.e. 5.1 surround signals
  • acoustic output channels of an acoustic output device that are specially distributed in a room.
  • Known principles use simple matrix multiplications of the left and right signal components of a stereo signal to generate corresponding surround signals.
  • a spatial hearing sensation is typically created here by adding various reverb effects.
  • the invention in contrast, has the object of specifying a novel or improved principle for generating and outputting a multi-channel signal from a stereo signal, which in particular creates a possibility of generating a spatial hearing sensation ("3D surround") without the need to add reverberation effects.
  • the method described here is used to generate and output an acoustic multi-channel signal, which is typically a surround signal, starting from a stereo signal.
  • the aim of the method is in particular to generate a multi-channel signal that is output via an acoustic output device comprising more than two output channels (loudspeakers), which enables a listener to experience a spatial auditory sensation ("3D effect", "3D surround”).
  • a stereo signal is provided.
  • the stereo signal can be provided in various ways.
  • the stereo signal can be provided via a sound carrier, i.e. a CD, a data carrier, i.e. a hard disk, or a data network, i.e. the Internet.
  • the stereo signal can be, for example, a piece of music, a piece of text, etc.
  • the stereo signal provided is divided into several signal components dependent on the direction of perception ("signal components").
  • the stereo signal is examined using suitable examination devices or algorithms with regard to individual signal components which, if the stereo signal were actually output via an output device comprising two output channels, i.e. a left and a right output channel, correspond or would correspond to an output direction or position perceived by a listener positioned in a defined position relative to the output device outputting the respective stereo signal.
  • a corresponding defined position of a listener relative to an output device outputting the stereo signal can, for example, be the tip of the stereo triangle in which the listener forms an equilateral triangle with the output channels or loudspeakers.
  • a corresponding signal component is a center signal component, which corresponds to an output direction or position perceived by a listener in the middle at actual output of the stereo signal via an output device comprising two output channels.
  • a corresponding signal component can also be a left signal component and a right signal component, which would correspond to an output direction or position perceived by a listener (more) to the left or (more) to the right (compared to a center) if the stereo signal were actually output via an output device comprising two output channels.
  • the division of the stereo signal carried out by means of suitable division devices or algorithms can provide a large number of perception-direction-dependent signal components; thus, a stereo signal can in principle be divided into all perception-direction-dependent signal components of the respective stereo signal.
  • the number of perception-direction-dependent signal components actually obtained is selected with regard to the number of output channels of the output device via which the multi-channel signal to be generated or generated according to the method is to be output.
  • an acoustic multi-channel signal or surround signal is generated by mixing each of the perception-direction-dependent signal components obtained after the described division of the stereo signal into corresponding perception-direction-dependent signal components onto a specific output channel of an output device comprising more than two output channels.
  • Each perception-direction-dependent signal component obtained from the division of the stereo signal into corresponding perception-direction-dependent signal components is then mixed to a specific output channel of an output device comprising more than two output channels, e.g. a 5.1 surround output device.
  • the output device is installed in a motor vehicle.
  • the signal components dependent on the direction of perception are assigned to certain output channels of the output device in accordance with a specific assignment rule.
  • the assignment rule takes into account the output direction or position of the respective signal component dependent on the direction of perception perceived by a listener of the stereo signal, corresponding to a respective signal component dependent on the direction of perception.
  • a center signal component is assigned to a center output channel of the output device and output via this.
  • a left signal component is assigned to a left output channel (left output channel) of the output device and output via this
  • a right signal component is assigned to a right output channel (right output channel) of the output device and output via this.
  • the multi-channel signal or the signal components dependent on the direction of perception are finally output via the respective output channels of the output device.
  • This enables a listener to experience a spatial auditory sensation ("3D effect") without the absolute necessity of adding reverberation effects.
  • the division of the provided stereo signal into several direction-dependent signal components is carried out by means of a source separation device.
  • a corresponding source separation device can be implemented, for example, by a source separation algorithm.
  • a suitable method for source separation or a suitable source separation algorithm is described, for example, in the German patent EN 10 2012 025 016 B3 described, to the disclosure content of which express reference is made.
  • the signal components dependent on the direction of perception are assigned certain amplification factors or coefficients or attenuation factors or coefficients to the respective output channels of the output device. By selecting appropriate amplification or attenuation factors, it is possible, for example, to determine which signal component is mixed in which ratio to a respective output channel. By amplifying or attenuating individual, several or all signal components through appropriate factorization of individual, several or all signal components - in general, this can also be understood as a weighting of signal components dependent on the direction of perception - the spatial hearing perception can be specifically influenced, ie in particular amplified.
  • the method it is possible for individual, several or all of the signal components dependent on the direction of perception to be mixed with a specific reverb effect or convolution reverb.
  • This also allows the spatial auditory perception to be specifically influenced, i.e. in particular amplified.
  • the properties of the respective reverb effect i.e. in particular the transfer function of the reverb coefficients, a much larger listening room than the one actually present can be simulated.
  • the actual creation of a spatial auditory perception does not occur through the addition of reverb effects; the method described here enables a listener to have a spatial auditory perception ("3D effect") without the absolute necessity of adding reverb effects.
  • the stereo signal is divided into at least a center signal component, a left signal component perceived to the left of the center signal component, and a right signal component perceived to the right of the center signal component.
  • the acoustic stereo signal provided is divided into at least one center signal component, one to the left of the center signal component perceived inner left signal portion, an outer left signal portion perceived to the left of the inner left signal portion, an inner right signal portion perceived to the right of the center signal portion and an outer signal portion perceived to the right of the inner right signal portion.
  • the present invention relates to a device for generating and outputting an acoustic multi-channel signal according to independent claim 4.
  • Fig.1 shows a schematic diagram of a device 1 according to an embodiment.
  • the device 1 which is installed in a motor vehicle (not shown), for example, is designed to generate and output an acoustic multi-channel signal.
  • the device 1 comprises as functional components a hardware and/or software-implemented distribution device 2, a hardware and/or software-implemented mixing device 3 and an acoustic output device 4 comprising more than two acoustic output channels 4.1 - 4.12 (loudspeakers).
  • the splitting device 2 is designed to split a provided acoustic stereo signal S, i.e. e.g. a piece of music, into several perception-direction-dependent signal components S.1 - S.5.
  • the splitting device 3 is designed to mix a perception-direction-dependent acoustic signal component S.1 - S.5 onto an output channel 4.1 - 4.12 of the output device 4 and to generate an acoustic multi-channel signal by mixing each perception-direction-dependent signal component S.1 - S.5 onto an output channel 4.1 - 4.12 of the output device 4.
  • the functional interaction of the above-mentioned 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 carrying out a method for generating and outputting an acoustic multi-channel signal.
  • the device 1 is therefore designed to carry out a method for generating and outputting an acoustic multi-channel signal, which is typically a surround signal.
  • the aim of the method is in particular to generate an acoustic output device 4 comprising more than two output channels 4.1 - 4.12. Multi-channel signal, which allows a listener a spatial hearing sensation ("3D effect” or "3D surround”).
  • the output device 4 can be installed in a motor vehicle (not shown).
  • a stereo signal S is provided.
  • the stereo signal S can be provided in various ways.
  • the stereo signal S can be provided via a sound carrier, i.e. e.g. a CD, a data carrier, i.e. e.g. a hard disk storage device, or a data network, i.e. e.g. the Internet.
  • the provided stereo signal S is divided by means of the division device 2 into several signal components S.1 - S.5 dependent on the direction of perception.
  • the stereo signal S is examined using suitable examination algorithms that can be assigned or are assigned by means of the division device 2 with regard to individual signal components S.1 - S.5, which correspond or would correspond to an output direction or position perceived by a listener when the stereo signal S is actually output via an output device comprising two output channels, i.e. a left and a right output channel.
  • the division of the stereo signal S into several direction-dependent signal components is carried out by means of a source separation device (not shown) implemented in hardware and/or software and associated with the division device 2.
  • a corresponding source separation device can be implemented, for example, by a source separation algorithm.
  • the stereo signal S is divided into five signal components S.1 - S.5, namely a center signal component S.3, an inner left signal component S.2 perceived to the left of the center signal component S.3, an outer left signal component S.1 perceived to the left of the inner left signal component S.2, an inner right signal component S.4 perceived to the right of the center signal component S.3 and a to the right of the inner right signal portion S.4 perceived outer signal portion S.5.
  • a center output channel 4.3 a rear left output channel 4.2, a front left output channel 4.1, a rear right output channel 4.4 and a front right output channel 4.5.
  • a corresponding output device is in Fig.1 shown.
  • the fundamentally predeterminable or predetermined number of the actually received perception direction-dependent signal components S.1 - S.5 is selected with regard to the number of output channels 4.1 - 4.5 of the output device 4.
  • an acoustic multi-channel signal is generated by mixing the perception direction-dependent signal components S.1 - S.5 to a specific output channel 4.1 - 4.5 of the output device 4.
  • Each perception direction-dependent signal component S.1 - S.5 obtained from the division of the stereo signal S into corresponding perception direction-dependent signal components S.1 - S.5 is then mixed to a specific output channel S.1 - S.5 of the output device 4, i.e., for example, a 5.1 surround output device.
  • the perception direction-dependent signal components S.1 - S.5 are assigned to specific output channels 4.1 - 4.5 of the output device 4 in accordance with a specific assignment rule.
  • the assignment rule takes into account the output direction or position of the respective perception direction-dependent signal component S.1 - S.5 corresponding to a respective perception direction-dependent signal component S.1 - S.5 perceived by a listener of the stereo signal S. S.5.
  • a center signal component S.3 is assigned to a center output channel 4.3 of the output device 4 and output via this.
  • the signal components S.1 - S.5 dependent on the direction of perception are mixed with specific amplification factors or coefficients or attenuation factors or coefficients onto the output channels 4.1 - 4.5 of the output device 4.
  • specific amplification factors or coefficients or attenuation factors or coefficients onto the output channels 4.1 - 4.5 of the output device 4.
  • the multi-channel signal or the signal components S.1 - S.5 dependent on the direction of perception are finally output via the respective output channels 4.1 - 4.5 of the output device 4.
  • This enables a listener to experience a spatial auditory sensation ("3D effect") without the mandatory need to add reverberation effects.
  • Fig.2 shows a schematic diagram of a device 1 according to a further embodiment. Fig.2 It is apparent from the exemplary embodiment shown that the number of signal components S.1 - S.5 dependent on the direction of perception does not necessarily have to correspond to the number of output channels 4.1 - 4.12 of the output device 4.
  • the output device 4 shown in the embodiment shown comprises, in addition to the typical output channels 4.1 - 4.6 of a 5.1 surround output device, namely a center output channel 4.3, a rear left output channel 4.2, a front left output channel 4.1, a rear right output channel 4.4, a front right output channel 4.5 and a subwoofer output channel 4.6, additional output channels 4.7 - 4.12 (3D loudspeakers), particularly arranged on the ceiling, which increase the spatial hearing sensation, namely an additional front left output channel 4.7, an additional front right output channel 4.8, an additional left center output channel 4.9, an additional right center output channel 4.10, an additional rear left output channel 4.11 and an additional rear right output channel 4.12.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Stereophonic System (AREA)

Claims (4)

  1. Procédé de production et d'émission d'un signal acoustique multicanaux dans un véhicule à moteur, comprenant les étapes suivantes:
    - fourniture d'un signal stéréo (S),
    - diviser le signal stéréo (S) fourni en plusieurs proportions de signaux sonores dépendant de la perception (p. 1 - p. 5), en examinant le signal stéréo (S) par l'intermédiaire d'appareils ou d'algorithmes d'analyse par rapport à la sortie effective du signal stéréo (S) par l'intermédiaire d'un canal de sortie gauche et d'un canal de sortie droit correspondant à une direction ou à une position de sortie perçues dans une position définie par rapport à l'émetteur du signal stéréo (S) concerné; où
    le signal stéréo (S) fourni est divisé en au moins une partie du signal central (p. 3), une part de signal gauche perçue à gauche (p. 3) à gauche et une partie de signal droite perçue à droite (p. 3); et où
    la division du signal stéréo fourni en plusieurs composantes de signaux acoustiques dépendant de la perception (p. 1 - p. 5) est effectuée à l'aide d'un dispositif de séparation de source;
    - production d'un signal acoustique multicanaux en mélangeant toute partie du signal acoustique dépendant de la perception (p. 1 - p. 5) sur un canal de sortie (4.1-4.12) d'un dispositif de sortie acoustique de plus de deux canaux (4.1 à 4.12) installé dans un véhicule à moteur (4),
    - sortie du signal multicanal généré par les canaux de sortie acoustiques correspondants (4.1 à 4.12) de l'appareil de sortie acoustique (4),
    le nombre de parts de signaux dépendantes de la perception (p. 1 - p. 5) est choisi en ce qui concerne le nombre de canaux de sortie (4.1 à 4.12) du dispositif de sortie (4) par lequel le signal multicanal est émis,
    dans le cadre du mélange des parts de signaux dépendantes de la perception (p. 1 - p. 5), il y a lieu d'attribuer les parts de signaux dépendant de la perception (S. 1 - p. 5) à certains canaux de sortie (4.1 à 4.12) du dispositif d'émission (4) selon une règle d'attribution déterminée, étant entendu que, lors de l'attribution des parts de signaux dépendantes de la perception (p. 1 - p. 5) à certains canaux de sortie (4.1 à 4.12) de l'appareil de sortie (4), la règle d'attribution est celle d'un canal de sortie spécifique (4.1 à 4.12) de l'appareil de sortie (4). la part de signal dépendante de la perception (p. 1 - p. 5) prend en compte la direction ou la position de sortie de la part du signal dépendant de la perception (p. 1 - p. 5) perçue par un auditeur du signal stéréo,
    une partie du signal central étant affectée à un canal de sortie centre (4) et émise par celui-ci, une partie de signal de gauche est affectée à un canal de sortie gauche du dispositif de sortie (4) et émise par celui-ci, et une partie de signal droit est affectée à un canal de sortie droit du dispositif de sortie (4) et émise par celui-ci, la procédure étant caractérisée par:
    mélanger les composantes du signal dépendant de la perception (p. 1 - p. 5) avec certains facteurs de renforcement ou d'affaiblissement sur les canaux de sortie respectifs (4.1 à 4.12) du dispositif de sortie acoustique (4).
  2. Procédé selon la revendication 1, caractérisé en ce qu'au moins une part de signal dépendant de la perception (p. 1 - p. 5) est mélangée avec un certain effet de réverbération.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que le signal stéréo (S) fourni est divisé en au moins une partie du signal central (S.3), une part de signal gauche interne perçue (S.2) perçue à gauche du signal central (S.3), une part de signal gauche externe perçue à gauche (S.2) perçue à gauche (p. 4), une partie du signal interne à droite perçue (p. 4) perçue à droite (p. 4).
  4. Dispositif (1) pour la génération et la sortie d'un signal acoustique multicanaux, comprenant:
    - un dispositif de répartition (2) conçu pour diviser un signal stéréo (S) fourni en plusieurs composantes de signal dépendant de la perception (S.1
    - p. 5), le dispositif de répartition (2) étant mis en place pour examiner le signal stéréo par l'intermédiaire de dispositifs ou d'algorithmes d'analyse appropriés en ce qui concerne les composantes du signal stéréo, qui correspondent, lors de la sortie effective du signal stéréo (S), au moyen d'un canal de sortie à gauche et d'un canal de sortie droit, correspondant à une direction ou à une position d'écoute perçues dans une position définie par rapport à l'émetteur positionné du signal stéréo en question; le séparateur (2) comprend un séparateur de source qui est configuré pour diviser le signal stéréo fourni en plusieurs composantes sonores dépendantes de la perception (S.1 - p. 5), le séparateur de source étant mis en place pour diviser le signal stéréo (S) fourni en au moins une partie du signal central (p. 3), une partie du signal gauche perçue à gauche (p. 3) et une partie du signal droit perçue à droite du signal central (p. 3);
    - un dispositif de mélange (3) mis en place pour mélanger une part de signal dépendante de la perception (p. 1 - p. 5) sur un canal de sortie acoustique (4.1-4.12) d'un dispositif de sortie acoustique de plus de deux canaux acoustiques (4.1 à 4.12) et pour produire un signal sonore multicanal en mélangeant chaque composante de signal dépendant de la perception (p. 1 - p. 5) sur un canal de sortie acoustique (4.1 à 4.12) d'un dispositif de sortie acoustique de plus de deux canaux (4.1 à 4.12) installés dans un véhicule à moteur (4),
    - un dispositif de sortie acoustique, comprenant plus de deux canaux de sortie acoustique (4.1 à 4.12), installé dans un véhicule à moteur (4), conçu pour émettre le signal multicanal par les canaux de sortie acoustiques correspondants (4.1 à 4.12);
    le nombre de parts de signaux dépendantes de la perception (p. 1 à 5) étant donné le nombre de canaux de sortie (4.1 à 4.12) du dispositif de sortie (4), par lequel le signal multicanal est émis,
    dans le cadre du mélange des parts de signaux dépendantes de la perception (p. 1 - p. 5), il y a lieu d'attribuer les parts de signaux dépendant de la perception (S. 1 - p. 5) à certains canaux de sortie (4.1 à 4.12) du dispositif d'émission (4) selon une règle d'attribution déterminée, étant entendu que, lors de l'attribution des parts de signaux dépendantes de la perception (p. 1 - p. 5) à certains canaux de sortie (4.1 à 4.12) de l'appareil de sortie (4), la règle d'attribution est celle d'un canal de sortie spécifique (4.1 à 4.12) de l'appareil de sortie (4). la part de signal dépendante de la perception (p. 1 - p. 5) prend en compte la direction ou la position de sortie de la part du signal dépendant de la perception (p. 1 - p. 5) perçue par un auditeur du signal stéréo,
    lorsqu'une partie du signal central est affectée à un canal de sortie central (4) et qu'elle est émise par le dispositif de sortie (4), qu'une partie de signal de gauche est associée à un canal de sortie gauche du dispositif de sortie et qu'elle est émise par celui-ci, et qu'une partie de signal droit est affectée à un canal de sortie droit du dispositif de sortie et émise par celui-ci;
    le dispositif étant caractérisé par le fait que les composantes du signal dépendant de la perception (p. 1 - p. 5) sont mélangées avec certains facteurs de renforcement ou d'affaiblissement sur les canaux de sortie respectifs (4.1 à 4.12) du dispositif de sortie acoustique (4).
EP18711933.4A 2017-03-21 2018-03-16 Procédé et dispositif pour produire et émettre un signal acoustique multicanal Active EP3603118B1 (fr)

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Application Number Priority Date Filing Date Title
DE102017106048.0A DE102017106048A1 (de) 2017-03-21 2017-03-21 Verfahren zur Erzeugung und Ausgabe eines akustischen Mehrkanalsignals
PCT/EP2018/056692 WO2018172213A1 (fr) 2017-03-21 2018-03-16 Procédé pour produire et émettre un signal acoustique multicanal

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EP3603118B1 true EP3603118B1 (fr) 2024-04-17

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US (2) US11019446B2 (fr)
EP (1) EP3603118B1 (fr)
CN (1) CN110431855B (fr)
DE (1) DE102017106048A1 (fr)
WO (1) WO2018172213A1 (fr)

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US20200092669A1 (en) 2020-03-19
CN110431855B (zh) 2021-09-28
CN110431855A (zh) 2019-11-08
EP3603118A1 (fr) 2020-02-05
US11659346B2 (en) 2023-05-23
US20210250719A1 (en) 2021-08-12
US11019446B2 (en) 2021-05-25
WO2018172213A1 (fr) 2018-09-27

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