EP3090572A1 - System for optimisation of music listening - Google Patents

System for optimisation of music listening

Info

Publication number
EP3090572A1
EP3090572A1 EP14815385.1A EP14815385A EP3090572A1 EP 3090572 A1 EP3090572 A1 EP 3090572A1 EP 14815385 A EP14815385 A EP 14815385A EP 3090572 A1 EP3090572 A1 EP 3090572A1
Authority
EP
European Patent Office
Prior art keywords
user
audio stream
optimization system
multimedia server
hearing
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.)
Ceased
Application number
EP14815385.1A
Other languages
German (de)
French (fr)
Inventor
Frédéric AMADU
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.)
Arkamys SA
Original Assignee
Arkamys SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Arkamys SA filed Critical Arkamys SA
Publication of EP3090572A1 publication Critical patent/EP3090572A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G06F3/165—Management of the audio stream, e.g. setting of volume, audio stream path
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/12—Audiometering
    • A61B5/121—Audiometering evaluating hearing capacity
    • A61B5/125—Audiometering evaluating hearing capacity objective methods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/75—Media network packet handling
    • H04L65/762—Media network packet handling at the source 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/2866—Architectures; Arrangements
    • H04L67/30—Profiles
    • H04L67/306—User profiles
    • 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
    • H04R27/02—Amplifying systems for the deaf
    • 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
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/041—Adaptation of stereophonic signal reproduction for the hearing impaired
    • 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

Definitions

  • the present invention relates to a music listening optimization system for several devices connected to a multimedia server.
  • the invention relates to all connected devices capable of transmitting an audio stream from a network and more particularly the devices connected to the Internet such as SmartPhone, connected car radios of automobiles, touch tablets and connected televisions.
  • the invention relates to the field of telecommunications and more particularly the electronic equipment for accessing the Internet that carries out the transmission of audio content from a multimedia server.
  • State of the art
  • the rendering qualities vary greatly between two types of terminals, for example between a smartphone having a simple speaker operating on a single audio channel and an audio system having a home theater device. It is thus particularly difficult to regulate the same way all connected equipment to emit an audio stream according to its convenience.
  • the present invention aims to remedy these drawbacks by proposing a musical listening optimization system for controlling all types of connected devices capable of transmitting an audio stream.
  • the invention relates to a musical listening optimization system comprising a multimedia server controlled by a user, said
  • 20 multimedia server comprising means for transmitting an audio stream on various connected devices provided with acoustic transmission means, means for selecting at least one connected device to which said audio stream is transmitted, a predetermined table of characteristics connecting said different connected devices with a measure of their capabilities
  • Acoustic reproduction a predetermined user table connecting at least one user with his hearing capabilities, and means for adapting said audio stream according to the measurement of the sound reproduction capabilities of the connected apparatus to which said audio stream is transmitted and according to the hearing capabilities of the user connected to said server
  • the invention thus makes it possible to control all types of connected devices capable of transmitting an audio stream by adapting the audio stream both to the apparatus on which the audio stream is transmitted and by adapting the audio stream to the user according to his hearing abilities.
  • the rendering of the sound felt by a given user is thus greatly improved compared to existing devices.
  • the sound reproduction can also be adapted according to the preferences of the user. For example, when the audio stream emits music whose rhythmic base is quiet, the user may prefer to reinforce the treble listening.
  • said multimedia server also comprises means for transmitting a video stream associated with said audio stream. This embodiment makes it possible to associate a video stream with the audio stream.
  • the video stream may include processing adapted to the device on which the video stream is transmitted and / or treatments associated with the preferences or capabilities of the user.
  • said multimedia server comprises a control interface that can be used from at least one of the different connected devices, the control interface being able to provide information on the connected user.
  • said predetermined table of characteristics is filled in during a step of installing a connected device as a function of the response of the acoustic emission means to different stimuli.
  • This embodiment makes it possible to know the playback characteristics of the connected device very quickly by using a microphone and by analyzing the sound reproduced and recorded.
  • the predetermined feature table may have multiple behaviors as a function of the ambient noise level.
  • the means for adapting the audio stream comprise several series connected RM type filters whose characteristics are adjusted according to the measurement of the capacitances of acoustic reproduction of the connected apparatus to which said audio stream is transmitted.
  • said predetermined user table is filled in during a step of defining the hearing capabilities of a user at several predetermined characteristic frequencies.
  • This embodiment makes it possible to estimate the hearing capabilities of a user according to the known methods used by the otorhinolaryngologist.es.
  • the predetermined user table may have several measurements depending on the ambient noise level.
  • the means for adapting the audio stream comprise several bandpass filters whose bandwidths are juxtaposed frequently on the spectrum of the audio stream, the number of bandpass filters corresponding to the number of characteristic frequencies and the gain of the bandpass filters being adjusted according to the hearing capabilities
  • the system comprises means for self-diagnosis of the user's hearing capabilities from a connected apparatus by means of listening by the user, for each characteristic frequency, of a sinusoidal signal whose the frequency is equal to the characteristic frequency and whose evolution of the gain makes it possible to determine a detection threshold below which the user is no longer able to hear the transmitted signal.
  • This embodiment makes it easier to measure the user's hearing capabilities.
  • the measurement of the hearing capabilities varies between -40 dB and + 40 dB for each predetermined characteristic frequency.
  • This embodiment limits the measurement band of the hearing capabilities so that it is contained in the amplitude of a conventional 96dB digital audio stream (16-bit quantization).
  • the characteristic frequencies are 125
  • Figure 1 illustrates a musical listening optimization system according to the invention
  • Figure 2 illustrates the elements of the multimedia server of the optimization system of Figure 1;
  • FIG. 3 illustrates the means for adapting the audio stream of the multimedia server of FIG. 2.
  • FIG. 1 illustrates a music listening optimization system 10 for several connected devices 15-19 to a multimedia server 11.
  • the multimedia server 1 1 is implanted in a cloud 13 (better known under the name of "Cloud” in the English literature) and comprises means 12 for transmitting at least one audio stream 14 with the connected devices 15-19 .
  • the media server 11 may stream music to a satellite connected device to the Internet.
  • the transmission means 12 may be of any known type.
  • the audio stream 14 is not necessarily stored on the multimedia server 11 and can be delivered by another server communicating with the multimedia server 11.
  • the connected devices 15-19 can be of any known type capable of broadcasting an audio stream 14.
  • the system 10 comprises a Smartphone 15 equipped with a single-channel acoustic emission means 21, a touch pad 16 provided with a single-channel acoustic transmission means 22, a connected television 17 provided with a bi-channel acoustic transmission means 23, a home theater device 18 provided with a means acoustic emission 24 type 4.1 and a car radio 19 of a motor vehicle equipped with a bi-channel acoustic emission means 25.
  • the multimedia server 1 1 comprises means 27 for selecting at least one connected device 15-19 and means 50 for adapting the audio stream 14 transmitted to the selected connected apparatus 15-19.
  • the selection means 27 are made by a control interface on which the digital tablet 16 is connected.
  • This control interface can be carried out by an application carried on at least one connected device 15-19 or by a secure internet page.
  • the touch pad 16 and the car radio 19 being connected to the Internet, the car radio 19 is selected by the touch pad 16 and the audio stream 14 is transmitted to the car radio 19.
  • the control interface is used to identify the user 36-39 and to adjust certain parameters of the transmitted audio stream 14.
  • the control interface may allow the user 36-39 to select several different predetermined atmospheres by deforming the original audio stream 20.
  • the media server 11 also includes a predetermined table of features 30 and a predetermined user table 35 shown in FIG. 2.
  • the predetermined table of features 30 enables the various connected devices 15-19 to be associated with a measure of their capabilities. sound reproduction 31 -34.
  • the predetermined table of characteristics 30 is indicated during a step of installing a connected device 15-19 as a function of the response of the acoustic emission means 21 -25 to different stimuli. To do this, at least one microphone is installed near the acoustic emission means 21-25. In the case of
  • the predetermined feature table 30 is in the form of a vector associated with each connected device 15-19. This vector represents attenuation measured at different frequencies.
  • the predetermined feature table 30 may include a plurality of matrix vectors, each of which represents the measured attenuation. in a particular environment, for example depending on the ambient noise level.
  • the predetermined user table 35 is entered during a step of defining the hearing capabilities 41-44 of a user 36-39 at a plurality of predetermined characteristic frequencies: 125 Hz, 250 Hz, 500 Hz, 750 Hz, 1 KHz, 1.5 KHz, 2 KHz and 3 KHz.
  • user 36-39 can go to an otolaryngologist or perform a self-diagnosis from a connected device 15-19.
  • the measurement performed in an otolaryngologist has the advantage of using calibrated measuring devices and the self-diagnostic measurement makes it possible to perform a relative measurement taking into account the acoustic reproduction capacities 31 -34 of the connected device. -19 on which the measurement is performed.
  • an application allows the user to listen, for each characteristic frequency, a sinusoidal signal whose frequency is equal to the characteristic frequency and whose
  • the predetermined user table 35 is in the form of a vector associated with each user 36-39 whose values vary between -40 dB and + 40 dB. This vector represents the hearing abilities
  • the predetermined user table 35 may comprise a plurality of matrix vectors, each of which represents the hearing capabilities 41-44 of a user 36-39 at a plurality of predetermined characteristic frequencies, for example depending on the level of the user. ambient noise.
  • the adaptation means 50 between the original audio stream 20 and the transmitted audio stream 14 are described in FIG. 3 for an exemplary embodiment.
  • the original stream 20 is first adapted according to the connected device 15-19 selected and then according to the hearing capabilities 41-44 of the user 36-39.
  • the adaptation as a function of the selected connected apparatus 15-19 is carried out by several RM 55 type filters connected in series (for "Infinite Impulse Response filter” in the English literature corresponding to a infinite impulse response filter).
  • the RM 55 filters comprise characteristics of the frequency, gain, order and bandwidth type which frequently modify the spectrum of the audio stream 14. These characteristics are adjusted according to the measurement of the acoustic reproduction capacities 31 -34 of the apparatus connected 15-19 to which said audio stream 14 is transmitted.
  • the adaptation can be performed automatically by a dedicated algorithm or by a sound engineer.
  • a normalization step 58 is performed.
  • the normalization step 58 consists of calculating in real time the power of the audio stream 14 and automatically compensating for the volume in order to limit the saturation phenomenon.
  • the adaptation according to the hearing capabilities 41-44 of the user 36-39 is performed by several bandpass filters 60 whose bandwidths are juxtaposed frequently on the spectrum of the audio stream 14.
  • the bandwidth of each filter bandpass 60 is centered in logarithmic scale on each predetermined characteristic frequency.
  • the bandwidth of the last band-pass filter 60 extends to half the sampling frequency of the audio stream 14.
  • the gain 56 of the bandpass filters 60 is adjusted according to the measurement of the hearing capabilities 41-44 of the user 36-39.
  • the gain of each bandpass filter 60 is equal to half the inverse of the measurement of the hearing capabilities 41-44 of the user 36-39 but, alternatively, the ratio may be different.
  • the signal at the output of each bandpass filter 60 is injected into an adder 62 to restore the signal as a whole and then a normalization step 63 is performed.
  • the normalization step 63 consists of calculating in real time the power of the audio stream 14 and automatically compensating for the volume in order to limit the saturation phenomenon.
  • the invention thus makes it possible to optimize the musical listening according to the selected connected device 15-19 and the hearing capabilities 41-44 of the user 36-39. The rendering of the sound felt by a given user is thus greatly improved compared to existing devices.
  • other adaptations of the audio stream 14 can be made. For example, when the audio stream emits music whose rhythmic base is quiet the user may prefer to reinforce the listening of treble.
  • a video stream may be associated with the audio stream 14 and the system 5 may implement means for adapting the video stream depending on the connected device 15-19 or the visual capabilities of the user 36-39 .
  • the video stream can be processed by increasing the colors and reducing the number of pixels to fit the resolution of a smartphone.
  • the invention can also be implemented on service automats such as cash dispensers or highway tolls, in order to adapt the communication of the PLC to the user.
  • the smart card in the case of a ticket dispenser, may contain a means of obtaining the hearing capabilities of the user of the smart card to adapt the instructions to the hearing capabilities of the card reader. 'user.
  • a motorway toll subscription device may contain the user's hearing capabilities. The invention thus makes it possible to limit the use of electronic devices to improve the hearing of persons by transferring auditory corrections to the automata with which they are to interact.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Acoustics & Sound (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Otolaryngology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
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Abstract

The present invention relates to a system for optimising music listening (10) which comprises a multimedia server (11) controlled by a user, said multimedia server (11) including means (12) for transmitting an audio stream (14) to various connected appliances (15-19) provided with acoustic emission means (21 -25), means (27) for selecting at least one connected appliance (15-19) to which said audio stream (14) is transmitted, a predetermined table of characteristics linking said various connected appliances (15-19) with a measurement of the acoustic reproduction capabilities thereof, a predetermined user table linking at least one user with the hearing capabilities thereof, and means (50) for adapting said audio stream (14) in accordance with the measurement of the acoustic reproduction capabilities of the connected appliance (15-19) to which said audio stream (14) is transmitted and in accordance with the hearing capabilities of the user connected to said multimedia server (11).

Description

SYSTEME D'OPTIMISATION D'ECOUTE MUSICALE  SYSTEM FOR OPTIMIZING MUSICAL LISTENING
Domaine de l'invention La présente invention concerne un système d'optimisation d'écoute musicale à destination de plusieurs appareils connectés à un serveur multimédia. L'invention concerne tous les appareils connectés aptes à émettre un flux audio en provenance d'un réseau et plus particulièrement les appareils connectés à Internet tels que les SmartPhone, les autoradios connectés des véhicules automobiles, les tablettes tactiles et les télévisions connectées. Field of the Invention The present invention relates to a music listening optimization system for several devices connected to a multimedia server. The invention relates to all connected devices capable of transmitting an audio stream from a network and more particularly the devices connected to the Internet such as SmartPhone, connected car radios of automobiles, touch tablets and connected televisions.
L'invention concerne le domaine des télécommunications et plus particulièrement les équipements électroniques d'accès à Internet qui effectuent l'émission de contenu audio depuis un serveur multimédia. Etat de la technique The invention relates to the field of telecommunications and more particularly the electronic equipment for accessing the Internet that carries out the transmission of audio content from a multimedia server. State of the art
Il existe de nombreuses plateformes sur Internet qui permettent de transmettre un flux musical à un terminal connecté muni de moyens d'émission acoustique. Par exemple, dans le cas d'un autoradio d'un véhicule automobile, le flux audio est transmis en streaming à l'autoradio qui transforme le signal audio pour l'émettre sur les différents haut-parleurs du véhicule. Le flux musique est stocké dans un nuage (plus connu sous le nom de « Cloud » dans la littérature anglo-saxonne). L'autoradio peut comporter un système d'amplification modulable permettant à l'utilisateur de modifier les paramètres du signal audio selon sa convenance. Cependant, il est souvent très complexe de régler efficacement les différents paramètres de l'autoradio et ces paramètres peuvent varier en fonction du flux audio et de la volonté de l'auditeur. There are many platforms on the Internet that can transmit a musical stream to a connected terminal equipped with acoustic transmission means. For example, in the case of a car radio of a motor vehicle, the audio stream is transmitted in streaming to the car radio that transforms the audio signal to emit on the various speakers of the vehicle. The music stream is stored in a cloud (better known as "Cloud" in the English literature). The car radio can have a modular amplification system allowing the user to modify the parameters of the audio signal according to his convenience. However, it is often very complex to effectively adjust the various parameters of the car radio and these parameters may vary depending on the audio flow and the willingness of the listener.
De plus, les qualités de restitution varient grandement entre deux types de terminaux, par exemple entre un Smartphone possédant un simple haut-parleur fonctionnant sur un seul canal audio et une chaîne audio possédant un dispositif Home Cinéma. Il est ainsi particulièrement difficile de régler de la même manière tous les équipements connectés pour émettre un flux audio selon sa convenance. In addition, the rendering qualities vary greatly between two types of terminals, for example between a smartphone having a simple speaker operating on a single audio channel and an audio system having a home theater device. It is thus particularly difficult to regulate the same way all connected equipment to emit an audio stream according to its convenience.
En outre, il existe également des technologies permettant depuis un terminal connecté de rediriger un flux audio vers un autre terminal. Par 5 exemple, la technologie « Air Play » (marque déposée) permet d'utiliser une tablette tactile pour diffuser un flux depuis la tablette tactile sur une télévision connectée. In addition, there are also technologies allowing from a connected terminal to redirect an audio stream to another terminal. For example, the "Air Play" (registered trademark) technology makes it possible to use a touch pad to broadcast a stream from the touch pad to a connected television.
Ces technologies sont disponibles par un réseau domestique, classiquement de type Wifi (pour « Wireless Fidelity » dans la littérature anglo- î o saxonne) mais ne permettent pas d'interagir avec des appareils connectés sur un réseau externe au réseau domestique. Ces technologies ne sont donc pas adaptées au contrôle du flux audio à bord d'un véhicule automobile. These technologies are available via a home network, typically of the Wifi type (for "Wireless Fidelity" in the English-language literature) but do not make it possible to interact with devices connected to a network external to the home network. These technologies are therefore not suitable for controlling the audio flow on board a motor vehicle.
Exposé de l'invention Presentation of the invention
15 La présente invention vise à remédier à ces inconvénients en proposant un système d'optimisation d'écoute musicale visant à commander tous les types d'appareils connectés aptes à émettre un flux audio. The present invention aims to remedy these drawbacks by proposing a musical listening optimization system for controlling all types of connected devices capable of transmitting an audio stream.
A cet effet, l'invention concerne un système d'optimisation d'écoute musicale comprenant un serveur multimédia commandé par un utilisateur, leditFor this purpose, the invention relates to a musical listening optimization system comprising a multimedia server controlled by a user, said
20 serveur multimédia comportant des moyens de transmission d'un flux audio sur différents appareils connectés munis de moyens d'émission acoustique, des moyens de sélection d'au moins un appareil connecté à destination duquel ledit flux audio est transmis, une table prédéterminée de caractéristiques reliant lesdits différents appareils connectés avec une mesure de leurs capacités de20 multimedia server comprising means for transmitting an audio stream on various connected devices provided with acoustic transmission means, means for selecting at least one connected device to which said audio stream is transmitted, a predetermined table of characteristics connecting said different connected devices with a measure of their capabilities
25 restitution acoustique, une table prédéterminée d'utilisateur reliant au moins un utilisateur avec ses capacités d'audition, et des moyens d'adaptation dudit flux audio en fonction de la mesure des capacités de restitution acoustique de l'appareil connecté à destination duquel ledit flux audio est transmis et en fonction des capacités d'audition de l'utilisateur connecté audit serveurAcoustic reproduction, a predetermined user table connecting at least one user with his hearing capabilities, and means for adapting said audio stream according to the measurement of the sound reproduction capabilities of the connected apparatus to which said audio stream is transmitted and according to the hearing capabilities of the user connected to said server
30 multimédia. L'invention permet ainsi de commander tous les types d'appareils connectés aptes à émettre un flux audio en adaptant le flux audio à la fois à l'appareil sur lequel le flux audio est émis et en adaptant le flux audio à l'utilisateur selon ses capacités d'audition. La restitution du son ressenti par un utilisateur donné est ainsi grandement améliorée par rapport aux dispositifs existants. En variante, la restitution du son peut également être adaptée en fonction des préférences de l'utilisateur. Par exemple, lorsque le flux audio émet une musique dont la base rythmique est calme, l'utilisateur peut préférer renforcer l'écoute des aigus. Selon un mode de réalisation, ledit serveur multimédia comporte également des moyens de transmission d'un flux vidéo associé audit flux audio. Ce mode de réalisation permet d'associer un flux vidéo au flux audio. En variante, le flux vidéo peut comporter des traitements adaptés à l'appareil sur lequel le flux vidéo est transmis et/ou des traitements associés aux préférences ou aux capacités de l'utilisateur. 30 multimedia. The invention thus makes it possible to control all types of connected devices capable of transmitting an audio stream by adapting the audio stream both to the apparatus on which the audio stream is transmitted and by adapting the audio stream to the user according to his hearing abilities. The rendering of the sound felt by a given user is thus greatly improved compared to existing devices. Alternatively, the sound reproduction can also be adapted according to the preferences of the user. For example, when the audio stream emits music whose rhythmic base is quiet, the user may prefer to reinforce the treble listening. According to one embodiment, said multimedia server also comprises means for transmitting a video stream associated with said audio stream. This embodiment makes it possible to associate a video stream with the audio stream. Alternatively, the video stream may include processing adapted to the device on which the video stream is transmitted and / or treatments associated with the preferences or capabilities of the user.
Selon un mode de réalisation, ledit serveur multimédia comporte une interface de commande utilisable depuis au moins un des différents appareils connectés, l'interface de commande étant apte à renseigner sur l'utilisateur connecté. Ce mode de réalisation permet à la fois d'identifier l'utilisateur et de commander tous les appareils connectés simultanément. According to one embodiment, said multimedia server comprises a control interface that can be used from at least one of the different connected devices, the control interface being able to provide information on the connected user. This embodiment makes it possible both to identify the user and to control all connected devices simultaneously.
Selon un mode de réalisation, ladite table prédéterminée de caractéristiques est renseignée lors d'une étape d'installation d'un appareil connectée en fonction de la réponse des moyens d'émission acoustique à différents stimuli. Ce mode de réalisation permet de connaître les caractéristiques de restitution de l'appareil connecté très rapidement en utilisant un microphone et en analysant le son restitué et enregistré. En variante, la table prédéterminée de caractéristiques peut comporter plusieurs comportements en fonction du niveau de bruit ambiant. According to one embodiment, said predetermined table of characteristics is filled in during a step of installing a connected device as a function of the response of the acoustic emission means to different stimuli. This embodiment makes it possible to know the playback characteristics of the connected device very quickly by using a microphone and by analyzing the sound reproduced and recorded. Alternatively, the predetermined feature table may have multiple behaviors as a function of the ambient noise level.
Selon un mode de réalisation, les moyens d'adaptation du flux audio comportent plusieurs filtres de type RM connectés en série dont les caractéristiques sont ajustées en fonction de la mesure des capacités de restitution acoustique de l'appareil connectée à destination duquel ledit flux audio est transmis. According to one embodiment, the means for adapting the audio stream comprise several series connected RM type filters whose characteristics are adjusted according to the measurement of the capacitances of acoustic reproduction of the connected apparatus to which said audio stream is transmitted.
Selon un mode de réalisation, ladite table prédéterminée d'utilisateur est renseignée lors d'une étape de définition des capacités d'audition d'un 5 utilisateur à plusieurs fréquences caractéristiques prédéterminées. Ce mode de réalisation permet d'estimer les capacités d'audition d'un utilisateur selon les méthodes connues utilisées par les otorhinolaryngologist.es. En variante, la table prédéterminée d'utilisateur peut comporter plusieurs mesures en fonction du niveau de bruit ambiant. î o Selon un mode de réalisation, les moyens d'adaptation du flux audio comportent plusieurs filtres passe-bandes dont les bandes passantes sont juxtaposées fréquentiellement sur le spectre du flux audio, le nombre de filtres passe-bandes correspondant au nombre de fréquences caractéristiques et le gain des filtres passe-bandes étant ajusté en fonction des capacités d'auditionAccording to one embodiment, said predetermined user table is filled in during a step of defining the hearing capabilities of a user at several predetermined characteristic frequencies. This embodiment makes it possible to estimate the hearing capabilities of a user according to the known methods used by the otorhinolaryngologist.es. Alternatively, the predetermined user table may have several measurements depending on the ambient noise level. According to one embodiment, the means for adapting the audio stream comprise several bandpass filters whose bandwidths are juxtaposed frequently on the spectrum of the audio stream, the number of bandpass filters corresponding to the number of characteristic frequencies and the gain of the bandpass filters being adjusted according to the hearing capabilities
15 de l'utilisateur. Ce mode de réalisation permet simplement et rapidement d'adapter le flux audio. 15 of the user. This embodiment allows simply and quickly to adapt the audio stream.
Selon un mode de réalisation, le système comporte des moyens d'autodiagnostic des capacités d'audition de l'utilisateur depuis un appareil connecté au moyen de l'écoute par l'utilisateur, pour chaque fréquence 20 caractéristique, d'un signal sinusoïdal dont la fréquence est égale à la fréquence caractéristique et dont l'évolution du gain permet de déterminer un seuil de détection au-dessous duquel l'utilisateur n'est plus capable d'entendre le signal émis. Ce mode de réalisation permet de faciliter la prise de mesure des capacités d'audition de l'utilisateur. According to one embodiment, the system comprises means for self-diagnosis of the user's hearing capabilities from a connected apparatus by means of listening by the user, for each characteristic frequency, of a sinusoidal signal whose the frequency is equal to the characteristic frequency and whose evolution of the gain makes it possible to determine a detection threshold below which the user is no longer able to hear the transmitted signal. This embodiment makes it easier to measure the user's hearing capabilities.
25 Selon un mode de réalisation, la mesure des capacités d'audition varie entre -40dB et +40dB pour chaque fréquence caractéristique prédéterminée. Ce mode de réalisation limite la bande de mesure des capacités d'audition afin qu'elle soit contenue dans l'amplitude d'un flux audio numérique classique de 96dB (quantification sur 16bits). According to one embodiment, the measurement of the hearing capabilities varies between -40 dB and + 40 dB for each predetermined characteristic frequency. This embodiment limits the measurement band of the hearing capabilities so that it is contained in the amplitude of a conventional 96dB digital audio stream (16-bit quantization).
30 Selon un mode de réalisation, les fréquences caractéristiques sont 125According to one embodiment, the characteristic frequencies are 125
Hz, 250 Hz, 500 Hz, 750 Hz, 1 KHz, 1 .5 KHz, 2 KHz et 3 KHz. Ces fréquences caractéristiques sont celles couramment mesurées par les otorhinolaryngologist.es. Elles sont connues pour être représentatives des capacités d'audition d'un utilisateur. Hz, 250 Hz, 500 Hz, 750 Hz, 1 KHz, 1.5 KHz, 2 KHz and 3 KHz. These frequencies features are those commonly measured by otorhinolaryngologist.es. They are known to be representative of the hearing abilities of a user.
Brève description des dessins On comprendra mieux l'invention à l'aide de la description, faite ci-après à titre purement explicatif, des modes de réalisation de l'invention, en référence aux Figures dans lesquelles : BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood by means of the description, given below for purely explanatory purposes, of the embodiments of the invention, with reference to the figures in which:
• la Figure 1 illustre un système d'optimisation d'écoute musicale selon l'invention ;  Figure 1 illustrates a musical listening optimization system according to the invention;
· la Figure 2 illustre les éléments du serveur multimédia du système d'optimisation de la Figure 1 ; et  Figure 2 illustrates the elements of the multimedia server of the optimization system of Figure 1; and
• la Figure 3 illustre les moyens d'adaptation du flux audio du serveur multimédia de la Figure 2. Description détaillée des modes de réalisation de l'invention  FIG. 3 illustrates the means for adapting the audio stream of the multimedia server of FIG. 2. DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION
La Figure 1 illustre un système d'optimisation d'écoute musicale 10 à destination de plusieurs appareils connectés 15-19 à un serveur multimédia 1 1 . Le serveur multimédia 1 1 est implanté dans un nuage 13 (plus connu sous le nom de « Cloud » dans la littérature anglo-saxonne) et comporte des moyens de transmission 12 d'au moins un flux audio 14 avec les appareils connectés 15-19. Par exemple, le serveur multimédia 1 1 peut envoyer une musique en streaming sur un appareil connecté par satellite au réseau Internet. Ainsi, les moyens de transmission 12 peuvent être de tous les types connus. Le flux audio 14 n'est pas nécessairement stocké sur le serveur multimédia 1 1 et peut être délivré par un autre serveur communiquant avec le serveur multimédia 1 1 . Figure 1 illustrates a music listening optimization system 10 for several connected devices 15-19 to a multimedia server 11. The multimedia server 1 1 is implanted in a cloud 13 (better known under the name of "Cloud" in the English literature) and comprises means 12 for transmitting at least one audio stream 14 with the connected devices 15-19 . For example, the media server 11 may stream music to a satellite connected device to the Internet. Thus, the transmission means 12 may be of any known type. The audio stream 14 is not necessarily stored on the multimedia server 11 and can be delivered by another server communicating with the multimedia server 11.
Les appareils connectés 15-19 peuvent être de tous les types connus aptes à diffuser un flux audio 14. Dans l'exemple de la Figure 1 , le système 10 comporte un Smartphone 15 muni d'un moyen d'émission acoustique 21 monocanal, une tablette tactile 16 munie d'un moyen d'émission acoustique 22 monocanal, une télévision connectée 17 munie d'un moyen d'émission acoustique 23 bi-canaux, un dispositif home cinéma 18 muni d'un moyen d'émission acoustique 24 de type 4.1 et un autoradio 19 d'un véhicule automobile muni d'un moyen d'émission acoustique 25 bi-canaux. The connected devices 15-19 can be of any known type capable of broadcasting an audio stream 14. In the example of FIG. 1, the system 10 comprises a Smartphone 15 equipped with a single-channel acoustic emission means 21, a touch pad 16 provided with a single-channel acoustic transmission means 22, a connected television 17 provided with a bi-channel acoustic transmission means 23, a home theater device 18 provided with a means acoustic emission 24 type 4.1 and a car radio 19 of a motor vehicle equipped with a bi-channel acoustic emission means 25.
Le serveur multimédia 1 1 comporte des moyens 27 de sélection d'au moins un appareil connecté 15-19 et des moyens 50 d'adaptation du flux audio 14 transmis à l'appareil connecté 15-19 sélectionné. Dans l'exemple de la Figure 1 , les moyens 27 de sélection sont réalisés par une interface de commande sur laquelle la tablette numérique 16 est connectée. Cette interface de commande peut être réalisée par une application portée sur au moins un appareil connecté 15-19 ou par une page internet sécurisée. Dans le cas de la Figure 1 , la tablette tactile 16 et l'autoradio 19 étant connectés à Internet, l'autoradio 19 est sélectionné par la tablette tactile 16 et le flux audio 14 est transmis à l'autoradio 19. De préférence, l'interface de commande permet d'identifier l'utilisateur 36-39 et de régler certains paramètres du flux audio 14 transmis. Par exemple, l'interface de commande peut permettre à l'utilisateur 36-39 de choisir plusieurs ambiances différentes prédéterminées en déformant le flux audio originel 20. The multimedia server 1 1 comprises means 27 for selecting at least one connected device 15-19 and means 50 for adapting the audio stream 14 transmitted to the selected connected apparatus 15-19. In the example of FIG. 1, the selection means 27 are made by a control interface on which the digital tablet 16 is connected. This control interface can be carried out by an application carried on at least one connected device 15-19 or by a secure internet page. In the case of Figure 1, the touch pad 16 and the car radio 19 being connected to the Internet, the car radio 19 is selected by the touch pad 16 and the audio stream 14 is transmitted to the car radio 19. Preferably, The control interface is used to identify the user 36-39 and to adjust certain parameters of the transmitted audio stream 14. For example, the control interface may allow the user 36-39 to select several different predetermined atmospheres by deforming the original audio stream 20.
Le serveur multimédia 1 1 comporte également une table prédéterminée de caractéristiques 30 et une table prédéterminée d'utilisateur 35 représentées sur la Figure 2. La table prédéterminée de caractéristiques 30 permet d'associer les différents appareils connectés 15-19 avec une mesure de leurs capacités de restitution acoustique 31 -34. La table prédéterminée de caractéristiques 30 est renseignée lors d'une étape d'installation d'un appareil connecté 15-19 en fonction de la réponse des moyens d'émission acoustique 21 -25 à différents stimuli. Pour ce faire, au moins un microphone est installé à proximité des moyens d'émission acoustique 21 -25. Dans le cas duThe media server 11 also includes a predetermined table of features 30 and a predetermined user table 35 shown in FIG. 2. The predetermined table of features 30 enables the various connected devices 15-19 to be associated with a measure of their capabilities. sound reproduction 31 -34. The predetermined table of characteristics 30 is indicated during a step of installing a connected device 15-19 as a function of the response of the acoustic emission means 21 -25 to different stimuli. To do this, at least one microphone is installed near the acoustic emission means 21-25. In the case of
Smartphone 15 ou de la tablette tactile 16, un microphone est déjà présent sur ces appareils connectés 15-19 et peut être utilisé. Dans l'exemple de la Figure 2, la table prédéterminée de caractéristiques 30 se présente sous la forme d'un vecteur associé à chaque appareil connecté 15-19. Ce vecteur représente l'atténuation mesurée à différentes fréquences. En variante, la table prédéterminée de caractéristiques 30 peut comporter plusieurs vecteurs formant une matrice dont chaque vecteur représente l'atténuation mesurée dans une ambiance particulière, par exemple en fonction du niveau de bruit ambiant. Smartphone 15 or the touch pad 16, a microphone is already present on these connected devices 15-19 and can be used. In the example of Figure 2, the predetermined feature table 30 is in the form of a vector associated with each connected device 15-19. This vector represents attenuation measured at different frequencies. Alternatively, the predetermined feature table 30 may include a plurality of matrix vectors, each of which represents the measured attenuation. in a particular environment, for example depending on the ambient noise level.
La table prédéterminée d'utilisateur 35 est renseignée lors d'une étape de définition des capacités d'audition 41 -44 d'un utilisateur 36-39 à plusieurs 5 fréquences caractéristiques prédéterminées : 125 Hz, 250 Hz, 500 Hz, 750 Hz, 1 KHz, 1 .5 KHz, 2 KHz et 3 KHz. Pour ce faire, l'utilisateur 36-39 peut se rendre chez un otorhinolaryngologiste ou réaliser un autodiagnostic depuis un appareil connecté 15-19. La mesure effectuée chez un otorhinolaryngologiste présente l'avantage d'utiliser des appareils de mesure calibrés et la mesure par î o autodiagnostic permet d'effectuer une mesure relative en prenant en compte les capacités de restitution acoustique 31 -34 de l'appareil connecté 15-19 sur lequel la mesure est effectuée. Pour ce faire, une application permet à l'utilisateur 35 d'écouter, pour chaque fréquence caractéristique, un signal sinusoïdal dont la fréquence est égale à la fréquence caractéristique et dontThe predetermined user table 35 is entered during a step of defining the hearing capabilities 41-44 of a user 36-39 at a plurality of predetermined characteristic frequencies: 125 Hz, 250 Hz, 500 Hz, 750 Hz, 1 KHz, 1.5 KHz, 2 KHz and 3 KHz. To do this, user 36-39 can go to an otolaryngologist or perform a self-diagnosis from a connected device 15-19. The measurement performed in an otolaryngologist has the advantage of using calibrated measuring devices and the self-diagnostic measurement makes it possible to perform a relative measurement taking into account the acoustic reproduction capacities 31 -34 of the connected device. -19 on which the measurement is performed. To do this, an application allows the user to listen, for each characteristic frequency, a sinusoidal signal whose frequency is equal to the characteristic frequency and whose
15 évolution du gain permet de déterminer un seuil de détection au-dessous duquel l'utilisateur 35 n'est plus capable d'entendre le signal émis. Dans l'exemple de la Figure 2, la table prédéterminée d'utilisateur 35 se présente sous la forme d'un vecteur associé à chaque utilisateur 36-39 dont les valeurs varient entre -40dB et +40dB. Ce vecteur représente les capacités d'auditionThe evolution of the gain makes it possible to determine a detection threshold below which the user 35 is no longer able to hear the transmitted signal. In the example of FIG. 2, the predetermined user table 35 is in the form of a vector associated with each user 36-39 whose values vary between -40 dB and + 40 dB. This vector represents the hearing abilities
20 41 -44 d'un utilisateur 36-39 à plusieurs fréquences caractéristiques prédéterminées. En variante, la table prédéterminée d'utilisateur 35 peut comporter plusieurs vecteurs formant une matrice dont chaque vecteur représente les capacités d'audition 41 -44 d'un utilisateur 36-39 à plusieurs fréquences caractéristiques prédéterminées, par exemple en fonction du niveau 25 de bruit ambiant. 41-44 of a user 36-39 at a plurality of predetermined characteristic frequencies. Alternatively, the predetermined user table 35 may comprise a plurality of matrix vectors, each of which represents the hearing capabilities 41-44 of a user 36-39 at a plurality of predetermined characteristic frequencies, for example depending on the level of the user. ambient noise.
Les moyens 50 d'adaptation entre le flux audio originel 20 et le flux audio transmis 14 sont décrit sur la Figure 3 pour un exemple de réalisation. Le flux originel 20 est tout d'abord adapté en fonction de l'appareil connecté 15-19 sélectionné puis selon les capacités d'audition 41 -44 de l'utilisateur 36-39. The adaptation means 50 between the original audio stream 20 and the transmitted audio stream 14 are described in FIG. 3 for an exemplary embodiment. The original stream 20 is first adapted according to the connected device 15-19 selected and then according to the hearing capabilities 41-44 of the user 36-39.
30 L'adaptation en fonction de l'appareil connecté 15-19 sélectionné est réalisée par plusieurs filtres de type RM 55 connectés en série (pour « Infinité Impulse Response filter » dans la littérature anglo-saxonne correspondant à un filtre à réponse impulsionnelle infinie). Les filtres de type RM 55 comportent des caractéristiques de type fréquence, gain, ordre et bande passante qui modifient fréquentiellement le spectre du flux audio 14. Ces caractéristiques sont ajustés en fonction de la mesure des capacités de restitution acoustique 31 -34 de l'appareil connectée 15-19 à destination duquel ledit flux audio 14 est transmis. L'adaptation peut être effectuée de manière automatique par un algorithme dédié ou par un ingénieur spécialiste du son. Lorsque le flux audio 14 a été transformé dans tous les filtres de type RM 55, une étape de normalisation 58 est effectuée. L'étape de normalisation 58 consiste à calculer en temps réel la puissance du flux audio 14 et à compenser automatiquement le volume afin de limiter le phénomène de saturation. The adaptation as a function of the selected connected apparatus 15-19 is carried out by several RM 55 type filters connected in series (for "Infinite Impulse Response filter" in the English literature corresponding to a infinite impulse response filter). The RM 55 filters comprise characteristics of the frequency, gain, order and bandwidth type which frequently modify the spectrum of the audio stream 14. These characteristics are adjusted according to the measurement of the acoustic reproduction capacities 31 -34 of the apparatus connected 15-19 to which said audio stream 14 is transmitted. The adaptation can be performed automatically by a dedicated algorithm or by a sound engineer. When the audio stream 14 has been transformed into all the RM 55 type filters, a normalization step 58 is performed. The normalization step 58 consists of calculating in real time the power of the audio stream 14 and automatically compensating for the volume in order to limit the saturation phenomenon.
L'adaptation en fonction des capacités d'audition 41 -44 de l'utilisateur 36- 39 est réalisée par plusieurs filtres passe-bandes 60 dont les bandes passantes sont juxtaposées fréquentiellement sur le spectre du flux audio 14. La bande passante de chaque filtre passe-bande 60 est centrée en échelle logarithmique sur chaque fréquence caractéristique prédéterminée. La bande passante du dernier filtre passe-bande 60 s'étend jusqu'à la moitié de la fréquence d'échantillonnage du flux audio 14. Ainsi, lorsque toutes les bandes passantes des filtres sont ajoutées, elles permettent de retrouver tout le spectre du flux audio 14. Le gain 56 des filtres passe-bandes 60 est ajusté en fonction de la mesure des capacités d'audition 41 -44 de l'utilisateur 36-39. De préférence, le gain de chaque filtre passe-bande 60 est égal à la moitié de l'inverse de la mesure des capacités d'audition 41 -44 de l'utilisateur 36-39 mais, en variante, le rapport peut être différent. Le signal en sortie de chaque filtre passe-bande 60 est injecté dans un sommateur 62 pour restituer le signal dans son ensemble puis une étape de normalisation 63 est effectuée. L'étape de normalisation 63 consiste à calculer en temps réel la puissance du flux audio 14 et à compenser automatiquement le volume afin de limiter le phénomène de saturation. L'invention permet ainsi d'optimiser l'écoute musicale en fonction de l'appareil connecté 15-19 sélectionné et des capacités d'audition 41 -44 de l'utilisateur 36-39. La restitution du son ressenti par un utilisateur donné est ainsi grandement améliorée par rapport aux dispositifs existants. En variante, d'autres adaptations du flux audio 14 peuvent être effectuées. Par exemple, lorsque le flux audio émet une musique dont la base rythmique est calme l'utilisateur peut préférer renforcer l'écoute des aiguës. The adaptation according to the hearing capabilities 41-44 of the user 36-39 is performed by several bandpass filters 60 whose bandwidths are juxtaposed frequently on the spectrum of the audio stream 14. The bandwidth of each filter bandpass 60 is centered in logarithmic scale on each predetermined characteristic frequency. The bandwidth of the last band-pass filter 60 extends to half the sampling frequency of the audio stream 14. Thus, when all the bandwidths of the filters are added, they make it possible to find the entire spectrum of the stream. 14. The gain 56 of the bandpass filters 60 is adjusted according to the measurement of the hearing capabilities 41-44 of the user 36-39. Preferably, the gain of each bandpass filter 60 is equal to half the inverse of the measurement of the hearing capabilities 41-44 of the user 36-39 but, alternatively, the ratio may be different. The signal at the output of each bandpass filter 60 is injected into an adder 62 to restore the signal as a whole and then a normalization step 63 is performed. The normalization step 63 consists of calculating in real time the power of the audio stream 14 and automatically compensating for the volume in order to limit the saturation phenomenon. The invention thus makes it possible to optimize the musical listening according to the selected connected device 15-19 and the hearing capabilities 41-44 of the user 36-39. The rendering of the sound felt by a given user is thus greatly improved compared to existing devices. In a variant, other adaptations of the audio stream 14 can be made. For example, when the audio stream emits music whose rhythmic base is quiet the user may prefer to reinforce the listening of treble.
De plus, un flux vidéo peut être associé au flux audio 14 et le système 5 peut mettre en œuvre des moyens d'adaptation du flux vidéo en fonction de l'appareil connecté 15-19 ou des capacités visuelles de l'utilisateur 36-39. Par exemple, le flux vidéo peut être traité par une augmentation des couleurs et une réduction du nombre de pixels pour s'adapter à la résolution d'un Smartphone. In addition, a video stream may be associated with the audio stream 14 and the system 5 may implement means for adapting the video stream depending on the connected device 15-19 or the visual capabilities of the user 36-39 . For example, the video stream can be processed by increasing the colors and reducing the number of pixels to fit the resolution of a smartphone.
L'invention peut également être mise en œuvre sur des automates de î o service tel que des distributeurs de billets ou des péages autoroutiers, afin d'adapter la communication de l'automate à l'utilisateur. Pour ce faire, dans le cas d'un distributeur de billet, la carte à puce peut contenir un moyen d'obtention des capacités d'audition de l'utilisateur de la carte à puce pour adapter les instructions aux capacités d'audition de l'utilisateur. Dans le cas 15 d'un automate de péage autoroutier, un dispositif d'abonnement au péage autoroutier peut contenir les capacités d'audition de l'utilisateur. L'invention permet ainsi de limiter l'utilisation d'appareils électroniques pour améliorer l'audition des personnes en reportant les corrections auditives sur les automates avec lesquels elles sont amenées à interagir. The invention can also be implemented on service automats such as cash dispensers or highway tolls, in order to adapt the communication of the PLC to the user. For this purpose, in the case of a ticket dispenser, the smart card may contain a means of obtaining the hearing capabilities of the user of the smart card to adapt the instructions to the hearing capabilities of the card reader. 'user. In the case of a motorway toll machine, a motorway toll subscription device may contain the user's hearing capabilities. The invention thus makes it possible to limit the use of electronic devices to improve the hearing of persons by transferring auditory corrections to the automata with which they are to interact.

Claims

REVENDICATIONS
1 . Système d'optimisation d'écoute musicale (10) comprenant un serveur multimédia (1 1 ) commandé par un utilisateur, ledit serveur multimédia (1 1 ) comportant : 1. A musical listening optimization system (10) comprising a user controlled multimedia server (1 1), said multimedia server (1 1) comprising:
- des moyens de transmission (12) d'un flux audio (14) sur différents appareils connectés (15-19) munis de moyens d'émission acoustique (21 -25), et  - transmission means (12) of an audio stream (14) on different connected devices (15-19) provided with acoustic emission means (21 -25), and
- des moyens de sélection (27) d'au moins un appareil connecté (15-19) à destination duquel ledit flux audio (14) est transmis,  means for selecting (27) at least one connected device (15-19) to which said audio stream (14) is transmitted,
caractérisé en ce que ledit serveur multimédia (1 1 ) comporte également : characterized in that said multimedia server (1 1) also comprises:
- une table prédéterminée de caractéristiques (30) reliant lesdits différents appareils connectés (15-19) avec une mesure de leurs capacités de restitution acoustique (31 -34), a predetermined table of characteristics (30) connecting said different connected devices (15-19) with a measurement of their acoustic reproduction capacities (31 -34),
- une table prédéterminée d'utilisateur (35) reliant au moins un utilisateur (36-39) avec ses capacités d'audition (41 -44), et  a predetermined user table (35) connecting at least one user (36-39) with his or her hearing capabilities (41 -44), and
- des moyens d'adaptation (50) dudit flux audio (14) en fonction de la mesure des capacités de restitution acoustique (31 -34) de l'appareil connecté (15-19) à destination duquel ledit flux audio (14) est transmis et en fonction des capacités d'audition (41 -44) de l'utilisateur (36-39) connecté audit serveur multimédia (1 1 ).  means (50) for adapting said audio stream (14) as a function of the measurement of the acoustic reproduction capacities (31 -34) of the connected apparatus (15-19) to which said audio stream (14) is transmitted and according to the hearing capabilities (41 -44) of the user (36-39) connected to said multimedia server (1 1).
2. Système d'optimisation d'écoute musicale (10) selon la revendication 1 , caractérisé en ce que ledit serveur multimédia (1 1 ) comporte également des moyens de transmission d'un flux vidéo associé audit flux audio (14). 2. Music listening optimization system (10) according to claim 1, characterized in that said multimedia server (1 1) also comprises means for transmitting a video stream associated with said audio stream (14).
3. Système d'optimisation d'écoute musicale (10) selon la revendication 1 ou 2, caractérisé en que ledit serveur multimédia (1 1 ) comporte une interface de commande utilisable depuis au moins un des différents appareils connectés3. Music listening optimization system (10) according to claim 1 or 2, characterized in that said multimedia server (1 1) comprises a control interface used from at least one of the various connected devices
(15-19), l'interface de commande étant apte à renseigner sur l'utilisateur (36-39) connecté. (15-19), the control interface being able to provide information on the user (36-39) connected.
4. Système d'optimisation d'écoute musicale (10) selon l'une des revendications 1 à 3, caractérisé en ce que ladite table prédéterminée de caractéristiques (30) est renseignée lors d'une étape d'installation d'un appareil connectée (15-19) en fonction de la réponse des moyens d'émission acoustique4. Music listening optimization system (10) according to one of claims 1 to 3, characterized in that said predetermined table of features (30) is filled during a step of installation of a connected device (15-19) depending on the response of the acoustic emission means
5 (21 -25) à différents stimuli. 5 (21-25) to different stimuli.
5. Système d'optimisation d'écoute musicale (10) selon la revendication 4, caractérisé en ce que les moyens d'adaptation (50) du flux audio (14) comportent plusieurs filtres de type RM (55) connectés en série dont les î o caractéristiques sont ajustées en fonction de la mesure des capacités de restitution acoustique (31 -34) de l'appareil connectée (15-19) à destination duquel ledit flux audio (14) est transmis. A music listening optimization system (10) according to claim 4, characterized in that the audio stream matching means (50) comprises a plurality of series-connected RM filters (55) whose The characteristics are adjusted according to the measurement of the acoustic reproduction capacities (31-34) of the connected apparatus (15-19) to which said audio stream (14) is transmitted.
6. Système d'optimisation d'écoute musicale (10) selon l'une des 15 revendications 1 à 5, caractérisé en ce que ladite table prédéterminée d'utilisateur (35) est renseignée lors d'une étape de définition des capacités d'audition (41 -44) d'un utilisateur (36-39) à plusieurs fréquences caractéristiques prédéterminées. 6. Music listening optimization system (10) according to one of claims 1 to 5, characterized in that said predetermined user table (35) is filled during a step of defining the capabilities of hearing (41-44) of a user (36-39) at a plurality of predetermined characteristic frequencies.
20 7. Système d'optimisation d'écoute musicale (10) selon la revendication 6, caractérisé en ce que les moyens d'adaptation (50) du flux audio (14) comportent plusieurs filtres passe-bandes (60) dont les bandes passantes sont juxtaposées fréquentiellement sur le spectre du flux audio (14), le nombre de filtres passe-bandes (60) correspondant au nombre de fréquences 25 caractéristiques et le gain (61 ) des filtres passe-bandes (60) étant ajusté en fonction des capacités d'audition (41 -44) de l'utilisateur (35). 7. A musical listening optimization system (10) according to claim 6, characterized in that the means (50) for adapting the audio stream (14) comprise a plurality of bandpass filters (60) whose bandwidths are frequently juxtaposed on the spectrum of the audio stream (14), the number of bandpass filters (60) corresponding to the number of characteristic frequencies, and the gain (61) of the bandpass filters (60) being adjusted according to the capabilities hearing (41-44) of the user (35).
8. Système d'optimisation d'écoute musicale (10) selon la revendication 6 ou 7, caractérisé en ce qu'il comporte des moyens d'autodiagnostic des8. A musical listening optimization system (10) according to claim 6 or 7, characterized in that it comprises means for self-diagnosis of
30 capacités d'audition (41 -44) de l'utilisateur (35) depuis un appareil connecté30 hearing capabilities (41 -44) of the user (35) from a connected device
(15-19) au moyen de l'écoute par l'utilisateur (35), pour chaque fréquence caractéristique, d'un signal sinusoïdal dont la fréquence est égale à la fréquence caractéristique et dont l'évolution du gain permet de déterminer un seuil de détection au-dessous duquel l'utilisateur (35) n'est plus capable d'entendre le signal émis. (15-19) by means of the user listening (35), for each characteristic frequency, a sinusoidal signal whose frequency is equal to the characteristic frequency and whose evolution of the gain makes it possible to determine a detection threshold below which the user (35) is no longer able to hear the transmitted signal.
9. Système d'optimisation d'écoute musicale (10) selon l'une des revendications 6 à 8, caractérisé en ce que la mesure des capacités d'audition9. Music listening optimization system (10) according to one of claims 6 to 8, characterized in that the measurement of hearing ability
(41 -44) varie entre -40dB et +40dB pour chaque fréquence caractéristique prédéterminée. (41 -44) varies between -40dB and +40dB for each predetermined characteristic frequency.
10. Système d'optimisation d'écoute musicale (10) selon l'une des revendications 6 à 9, caractérisé en ce que les fréquences caractéristiques sont10. Music listening optimization system (10) according to one of claims 6 to 9, characterized in that the characteristic frequencies are
125 Hz, 250 Hz, 500 Hz, 750 Hz, 1 KHz, 1 .5 KHz, 2 KHz et 3 KHz. 125 Hz, 250 Hz, 500 Hz, 750 Hz, 1 KHz, 1.5 KHz, 2 KHz and 3 KHz.
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AU1961801A (en) * 1999-09-28 2001-05-10 Sound Id Internet based hearing assessment methods
US20020068986A1 (en) * 1999-12-01 2002-06-06 Ali Mouline Adaptation of audio data files based on personal hearing profiles
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