Adaptive system and method for multichannel broadcasting.

Abstract

The invention relates to a method and adaptive system for multichannel audio distribution between at least one stereo audio source (SA1, SA2, SA3, SA4) and at least one playback device (EP, EA), such as a passive or active loudspeaker. The system comprises a hub (H) capable of receiving stereo audio (ST) content from at least one audio source (SA1, SA2, SA3, SA4), and at least one linking device (L1, L2) connected by wire to a playback device (EP, EA). The hub (H) is capable of converting any stereo content (ST) into a set of spatialized audio streams, each stream being associated with and transmitted to a corresponding linking device (L1, L2) according to a predetermined playback configuration, while the linking device (L1, L2) provides the loudspeaker with the spatialized audio stream it receives from the hub (H) for playback. To this end, the preferred communication protocol between the concentrator (H) and each link (L1, L2) is the WISA protocol.Figure from the summary: Fig. 1.

Description

Title of the invention: Adaptive multichannel broadcasting system and method. technical field

[0001] The present invention lies in the field of transforming stereo audio content into high-fidelity spatial sound, directly applicable to embedded systems.

[0002] State of the art

[0003] Current spatial sound systems require a centralized amplifier connected by cables to specific loudspeakers. These configurations are often rigid, require compatibility between the amplifier and the loudspeakers, and restrict installation flexibility.

[0004] Among these systems, spatialization devices and processes offering good immersive quality, such as Dolby Atmos and DTS:X, are well known.

[0005] However, these solutions are limited to content mixed specifically for them. For example, to benefit from Dolby Atmos sound, the audio content must be mixed and encoded in this format. Furthermore, these technologies impose hardware constraints, such as specific channel configurations and HDMI connections for optimal transmission.

[0006] Moreover, conventional wireless solutions, such as Bluetooth or Wi-Fi, do not meet the latency requirements for an immersive multi-speaker audio experience.

[0007] Thus, low-latency wireless streaming in multi-speaker configurations remains difficult with current solutions, due to the imperative synchronization of audio channels.

[0008] In order to provide a little more flexibility by allowing the number of channels of the sound content and the number of loudspeakers constituting the installation to be defined separately, document WO2023232586A1 presents a signal processing method which transforms X input signals into M output signals by generating in particular N signals simulating propagation in a virtual space comprising N virtual loudspeakers and a virtual listening position distributed according to a predetermined geometry.

[0009] In order to implement the solution provided in document WO2023232586A1, user intervention remains essential for the precise configuration of their audio equipment, in particular by determining the geometry of the space virtual and the number of speakers he / she wishes to use or the selection of a predetermined virtual space in a database.

[0010] Also, most existing systems do not support simple stereo sources, such as those broadcast via analog media, requiring strict compatibility with standards and equipment.

[0011] In summary, the limitations of the traditional approach are numerous: cumbersome cabling, restrictions related to speaker choice, dependence on a central amplifier, and high latency in conventional wireless solutions. These constraints limit users' ability to create an immersive and adaptable audio environment. Summary of the invention

[0012] The invention aims to improve the situation described above.

[0013] The invention aims to remedy the drawbacks of the prior art, by proposing a system and method of wireless adaptive multichannel broadcasting, transparent to the user.

[0014] Another object of the invention is to propose a system and a method which do not depend on specially mixed contents.

[0015] Another objective of the invention is to propose a system and a method offering maximum compatibility with different formats, connectors, and streaming services, enabling an immersive experience, particularly in configurations of three to eight channels.

[0016] Another object of the invention is to provide a system and a method for spatializing any stereo content without going through compatible equipment or content.

[0017] Finally, another objective of the invention is to propose a system and a method enabling the transformation and wireless diffusion of high-fidelity spatial sound operating with any type of active or passive audio speaker, with synchronized transmission and without perceptible latency for an optimal immersive experience.

[0018] In order to freely arrange multimedia equipment in a room, particularly with regard to speakers for broadcasting sound content, a user will seek a solution that offers as many advantages as possible, such as ease and speed of installation, the possibility of keeping existing equipment, the efficiency and quality of spatialization, as well as the possibility of customizing the layout and maintaining flexibility for adding or removing equipment in the future.

[0019] To this end, the adaptive multichannel diffusion method between at least one stereo audio source and at least one diffusion means according to the invention comprises the steps of:

[0020] a) obtain a broadcast configuration relating to a set of linking means, each linking means being connected by wire to a broadcasting means, the broadcasting configuration comprising for each linking means a data triad consisting of its index, its spatial positioning and the broadcasting channel assigned to it;

[0021] b) detect by a hub at least one audio source to which it is connected and / or able to connect;

[0022] c) initialize the audio connection between the hub and each linking means;

[0023] d) receive at the hub stereo content from a detected audio source;

[0024] e) based on the broadcast configuration obtained, convert at the concentrator the received stereo content into a set of spatialized audio streams and associate each stream with a unique linking means;

[0025] f) transmit in a synchronized manner and via a wireless protocol each spatialized audio stream to each corresponding linking means;

[0026] g) for each linking means, provide the spatialized audio stream, via wired means, to the broadcasting means to which it is connected, and broadcast said spatialized audio stream by said broadcasting means.

[0027] The implementation of the method takes place within the adaptive multichannel diffusion system between at least one stereo audio source and at least one diffusion means as provided according to the invention.

[0028] The multichannel broadcasting system comprises:

[0029] - a hub comprising a control unit, a memory, and a transmitter- wireless receiver, said hub being capable of receiving stereo content or stream from an audio source, and of converting the received stereo content into a set of spatialized audio streams, a spatialized audio stream being associated with a spatial positioning correlated to a linking means;

[0030] - at least one means of connection connected by wire to a means of dissemination, the linking means comprising a control unit, a memory, a wireless transceiver, and being capable of receiving a spatialized audio stream from the hub and then transmitting the spatialized audio stream by means of broadcasting.

[0031] The hub and the linking means thus each advantageously comprise a control unit, a memory and a wireless transceiver.

[0032] According to the invention, a single linking means is connected to a single diffusion means.

[0033] Wireless transceivers are advantageously compatible with all types of wireless technology, and more particularly WISA, Wifi or Bluetooth.

[0034] The control unit of the hub advantageously includes a microcontroller and a digital signal processor capable of processing audio and video signals, while the control unit of each link means advantageously includes a microcontroller.

[0035] The hub and the linking means each include a memory enabling local data storage, such as configuration data or sound calibration data.

[0036] The instructions of the computer program product which, when the program is executed by the computer means of the system according to the invention, lead the latter to implement the corresponding process, are stored at the level of each microcontroller of the system, that is to say at the level of the concentrator and at the level of each linking means.

[0037] The hub is designed to be adaptive and is therefore capable of receiving stereo content from various audio sources, whether connected via wired or wireless technology. With its variety of inputs, such as HDMI, RCA, USB-C, Ethernet, SOM, and ADC, the hub offers the user the ability to keep their existing equipment and vary the media used for listening, for example: a television, a computer, a tablet, a turntable, a digital disc player, or a "Cast" type connector.

[0038] Each linking means consists of a very compact unit, connected by wire to a playback device such as a passive or active loudspeaker. Advantageously, each linking means is capable of receiving a spatialized audio stream from the hub wirelessly and transmitting the spatialized audio stream to the playback device via wire.

[0039] Preferably, the linking means transmits the spatialized audio stream to the broadcasting means via a differential digital-to-analog converter.

[0040] In embodiments of the invention implementing at least one passive diffusion means such as a passive speaker, the linking means advantageously includes an amplification module controlled by the control unit of the linking means, said amplification module being connected to the passive diffusion means and capable of amplifying the spatialized audio stream prior to its diffusion.

[0041] Preferably, the audio streams passing through the system equipment, i.e. between their components, within the hub and at least one linking means, whether stereo streams or spatialized streams, are transmitted according to the I2S protocol.

[0042] Preferably, the data flows transiting in the system equipment, i.e. between their components, within the hub and at least one linking means, are transmitted according to the I2C protocol.

[0043] Furthermore, the multichannel broadcasting system according to the invention may further include an interface, such as a tablet or a phone, capable of receiving configuration instructions from the user, such as spatial positioning and / or sound calibration data, and of transmitting said instructions to the concentrator.

[0044] The interface can also constitute an audio source capable of providing stereo content for broadcasting.

[0045] In order to obtain adaptive multichannel diffusion within the system between at least one audio source and at least one means of diffusion, the method includes various steps governing communication between the equipment.

[0046] According to step a), the method thus provides for obtaining a dissemination configuration for all the linking means. Such a dissemination configuration comprises, for each linking means, a data triad consisting of:

[0047] - its index, such as its label or product number;

[0048] - its spatial positioning, such as "front left", "front center", "front right”, “left side”, “right side”, “left rear”, “center rear”, “right rear”, “left ceiling”, “right ceiling”, preferably defined by the user, possibly by interaction with an interface capable of receiving configuration instructions from the user and transmitting said instructions to the concentrator;

[0049] - of the broadcast channel assigned to it by the concentrator or by the user during the stage of building a new configuration.

[0050] Preferably, step a) of obtaining a broadcast configuration comprises:

[0051] - either the recovery by the concentrator of the existing saved configuration in its memory, the existing configuration then corresponds to the broadcast configuration, such a case occurring essentially during the routine use of the system and process, the user using at least the same equipment in the same locations for a certain time,

[0052] - either the construction of a new configuration, for example during the very first iteration of the process when no broadcast configuration exists, or when a malfunction necessitates a complete reconfiguration of the system, or when the user wishes to add and / or remove at least one means of connection and / or at least one means of broadcasting the system.

[0053] To this end, the construction of a new configuration advantageously includes the substeps of:

[0054] - al) adding at least one new set of three data points and / or deleting at least minus one set of three data points;

[0055] - a2) saving the new configuration constructed obtained in step a1) in the concentrator memory;

[0056] - a3) retrieval of the new configuration built from memory of the concentrator, the new configuration built then corresponds to the diffusion configuration.

[0057] In practice, the input of at least one new trinomial of data includes the sub-steps of:

[0058] - detection by the concentrator of at least one linking means not belonging In a given configuration, detection is preferentially carried out by a link discovery protocol such as the LDP protocol (in English: "Link Discovery Protocol");

[0059] - obtaining a spatial positioning for each detected link means, preferably defined by the user, possibly by interaction with an interface capable of receiving configuration instructions from the user and transmitting said instructions to the hub;

[0060] - assignment of a broadcast channel to at least one linking means detected in depending on the spatial positioning obtained, by the concentrator or by the user.

[0061] To facilitate installation and use of the system by the user, the method preferably includes, for each link detected during the spatial positioning step, a substep of locating the link by transmitting a chime command from the concentrator to the link for which spatial positioning is required, and by broadcasting said chime by said broadcasting means. Naturally, the link acts as an intermediary and transmits the chime to said broadcasting means. The term "chime" refers to an audio track in the form of a brief notification enabling the human user to locate and identify the link and thus the enclosure to be characterized with regard to its spatial positioning.

[0062] Consequently, in order to ensure multichannel playback of a stereo audio source, a step b) of detection by the hub of at least one stereo audio source to which it is connected and / or capable of connecting is necessary. This detection is carried out by mapping the inputs supporting the I2S protocol and connected to the digital signal processor of the hub's control unit.

[0063] Of course, the order in which steps a) and b) are carried out is of little importance.

[0064] Once steps a) to b) have been carried out, a step c) of initializing the audio connection between the hub and each linking means is carried out, during which the microcontroller of the concentrator's control unit creates the WiSA network or group that brings together the concentrator and at least one linking means.

[0065] In order to provide user-friendly confirmation of the successful installation and / or system startup and / or any other step, and for example as a test guide, the method may include, after step c) of initializing the audio connection, an acknowledgment step comprising a substep of activating the volume to a first sound level, for example to a level of 50% and a substep of confirming acknowledgment by conversion at the hub level of a stereo acknowledgment content into a set of spatialized audio streams then by synchronous wireless transmission of each spatialized audio stream to each linking means and finally by broadcasting said spatialized audio stream by the broadcasting means to which the linking means is connected.

[0066] The system is then ready to convert the stereo content and broadcast the spatialized sound. The process for this includes:

[0067] - a receiving step d) at the concentrator, preferably at level of the digital signal processor, of stereo content from a previously detected audio source;

[0068] - a conversion step d) based on the resulting diffusion configuration, at the level of the received stereo content concentrator, in a set of spatialized audio streams and association of each spatialized audio stream to a single linking means, quite preferably the set of audio streams comprises between three and eight streams;

[0069] - a step f) of transmission in a synchronized manner and via a wireless protocol, preferably via the WISA protocol, from each spatialized audio stream to each corresponding linking means;

[0070] - a step g) for each linking means, for supplying the spatialized audio stream, via wired connection, by means of the broadcasting device to which it is connected and the broadcasting of said spatialized audio stream.

[0071] Preferably, a spatialized audio stream amplification step is carried out by the linking means before step g) of supplying the spatialized audio stream to the broadcasting means when the latter is a passive broadcasting means.

[0072] In order to ensure optimal operation, the method further preferably includes, prior to step a) obtaining a configuration, at least one of the following steps:

[0073] - hub update;

[0074] - update of at least one means of connection.

[0075] Updating the hub and / or at least one linking means consists of updating the software of the computer program stored in each respective microcontroller. The updates guarantee, in particular, access to the latest generation features as well as the resolution of any malfunctions.

[0076] Advantageously, the hub update is triggered by itself, based on a comparison of the available software version.

[0077] Advantageously, the update of at least one link means is offered and / or triggered following verification by the concentrator of the availability of such an update for said link means, based on a comparison of the software version. Depending on the requirements, at least one link means receives the update:

[0078] - by transmission according to the I2S protocol, and / or

[0079] - by wired means, for example via a USB cable, and / or

[0080] - by wireless transmission, preferably via the WISA protocol, from the concentrator.

[0081] Preferably, the update of the hub and / or at least one means of connection is carried out by wired means, for example via a USB cable.

[0082] Most preferably, the update is received by at least one means of connection by wireless transmission via the WISA protocol, from the hub.

[0083] According to another aspect of the invention, it also relates to a computer program product comprising instructions which, when the program is executed by the computer means of the system according to the invention, lead the latter to implement the process described above.

[0084] Finally, according to yet another aspect of the invention, it relates to a non-transient data carrier readable by the computer means of the system according to the invention, on which the computer program product is recorded.

[0085] As explained above, the method and system according to the invention are perfectly suited to home audio systems such as home theaters, immersive sound installations in conference rooms or virtual reality environments, or other situations requiring flexible sound spatialization. This technology is particularly valuable for streaming or downloaded digital content, due to its compatibility with analog sources such as turntables or wired digital sources such as HDMI for televisions or USB-C for computers, tablets, or phones. It allows for total sound immersion from any stereo source, thus guaranteeing a high-quality sound experience without depending on a specific configuration or content mixed for a particular system. Figures

[0086] Other features and advantages of the present invention will become apparent from the description below, with reference to the attached Figures 1 and 2, which illustrate an example of an embodiment without being limiting in any way and on which:

[0087] [Fig.1]

[0088] Fig. 1 represents the system according to the invention;

[0089] [Fig.2]

[0090] Figure [Fig. 2] represents the method according to the invention;

[0091] [Fig.3]

[0092] Figure 3 represents an embodiment of a connecting means according to the invention. Detailed description

[0093] An embodiment of the device according to the invention is presented below with reference to figures 1 to 3.

[0094] In the proposed configuration and as illustrated in [Fig. 1], the system according to the invention comprises a hub H which a user can connect, on the one hand, as an input to at least one audio source SA1, SA2, SA3, SA4 capable of providing stereo content ST:

[0095] - wired, for example to: an SA1 television connected by HDMI cable, a support for external data SA2 connected via USB-C cable, a vinyl turntable S A3 connected via RCA cable;

[0096] - by wireless technology, for example to an SA4 computer;

[0097] - via wired and / or wireless technology V, to an interface X such as a smartphone;

[0098] and connect on the other hand at the output:

[0099] - wired, for example via optical O, to an output device such as a soundbar B in order to assign audio channels to it;

[0100] - by a wireless W technology, to as many L1, L2 linking means as passive speakers (EP) or active speakers (EA).

[0101] The wired connection to audio sources does not present any constraints for the user, since the location of these sources is rarely required to be changed and they are most often grouped together to minimize clutter in a home or performance hall.

[0102] It is indeed common to place an SA4 DVD player and / or an SA2 game console directly under the S Al television, whereas during their use, an immersive sound experience (known as "surround sound") is crucial. For this reason, speakers such as the B soundbar and the EA, EP speakers must instead be distributed around the room so as to effectively surround the listener, and the presence of cables can become problematic.

[0103] The solution proposed by the invention frees the user from the use of multiple, unsightly connectors of varying or even considerable lengths linking the control system to the speakers across the room.

[0104] The user will be able to distribute his diffusers according to his preferences without placement restrictions and associate them respectively by wired connection with an external L1, L2 link means which makes them compatible with a wireless transmission technology.

[0105] The user is therefore not obligated to renew their equipment to maintain a high-performing system, which has both an economic and environmental advantage.

[0106] Indeed, the H hub transforms any stereo content into immersive spatial sound, without relying on prior mixing or imposed configuration. Compatibility with analog and digital sources ensures broad accessibility.

[0107] For this purpose the concentrator H includes a control unit UH implementing a microcontroller capable of storing the computer program enabling the proper execution of the process and a digital signal processor capable, among other things, of processing stereo content, a memory MH capable of storing data locally, such as configuration data or sound calibration data, and a wireless transceiver TH.

[0108] Each linking means L1, L2 comprises a control unit UL implementing a microcontroller capable of storing the computer program enabling the proper execution of the process, a memory ML capable of storing local data, such as configuration data or sound calibration data, a wireless transceiver TL.

[0109] The L1, L2 linking means are compatible with any type of diffuser, by means of integrated support for connectors, and communicate advantageously by wireless transmission W according to the WISA protocol with the hub H which is equipped with a wireless transceiver TH.

[0110] The WISA protocol guarantees the user a synchronized transmission with no perceptible latency, the latter being less than 5ms, for an optimal immersive experience.

[0111] Each linking means L1, L2 is in the form of a small box which the user connects by wire to a passive speaker EP or active speaker EA so as to transmit to it the spatialized audio stream received from the concentrator H, and is electrically powered by wired connection C to the mains in order to operate autonomously.

[0112] The user chooses a linking means L1 having an amplification module A when he wants to equip one of his passive speakers EP, while he chooses a linking means L2 without amplification functionality when he wants to equip an active speaker.

[0113] As illustrated in [Fig.3], the amplification module A is controlled by the control unit UL and connected to said passive speaker EP.

[0114] Such a principle of integrating amplification at the level of each linking means L1, L2 makes the use of a central amplifier obsolete.

[0115] Preferably, the linking means L1, L2 transmits the spatialized audio stream to the speaker EA, EP, via a differential digital-to-analog converter DAC.

[0116] Once the hub H is connected to the audio sources SA1, SA2, SA3, SA4 and the linking means L1, L2 are connected to the speakers EA, EP, the user will be able to initialize and / or start the system.

[0117] In order to fully adapt the installation to his needs, the user can use an interface X such as a tablet, a smartphone, a touch screen, a keyboard or a remote control, connected by wire or wireless means for example by Wi-Fi or Bluetooth to the hub H, in order to communicate with the latter.

[0118] Through this arrangement, the user can configure and use the entire system, via the hub H, in particular using a dedicated application.

[0119] The X interface provided by the smartphone can also constitute an audio source capable of providing stereo ST content for broadcast.

[0120] The user can, through such an X interface and an associated application, interact with the system and, for example, calibrate each speaker according to its placement, the room acoustics, and their personal needs. Features for adjusting sound level, balance, synchronization, and channel and / or stream optimization can be provided, allowing for complete customization of the audio experience.

[0121] Depending on requirements, automatically or at the user's request, various optional steps can be implemented during system startup, such as an update 01 of the hub H and / or an update 02 of at least one linking means L1, L2.

[0122] A detection U2 of the available stereo audio sources SA1, SA2, SA3, SA4 is then carried out during step b) by the concentrator H, for example simultaneously with step a) of obtaining U1 a broadcast configuration relative to the set of linking means L1, L2.

[0123] This broadcast configuration consists of a file K grouping together trinomials of data associating, for each linking means L1, L2, its index, its spatial positioning and the broadcast channel associated with it.

[0124] In routine use, the K broadcast configuration is the same each time the system is used. The existing KE configuration can be retrieved from memory MH where it was saved by the concentrator H.

[0125] During the initial installation or when modifying the system, the user manages the number and positioning of the L1 and L2 link means, for example by adding, swapping, or deleting them. The broadcast configuration file K must then be entirely created or modified before being saved.

[0126] For this, the construction of a new KN configuration includes several sub-steps.

[0127] When adding a linking means L1, L2, the hub H will detect its presence, then the user will be able to declare their spatial positioning via the application on their smartphone and the hub H will assign a broadcast channel to said linking means L1, L2. A new data triad is then added to the configuration file K.

[0128] When a linking means L1, L2 is deleted, the corresponding data trinomial is deleted from the broadcast configuration file K.

[0129] Once the additions or deletions are completed, the newly constructed KN configuration is saved in the MH memory of the hub H, and then retrieved as the broadcast configuration to be used.

[0130] In order to assist and guide the user in declaring the spatial positioning of each linking means L1, L2, the concentrator H can, for each linking means L1, L2 that it has detected, transmit to it a chime command, which will be received by said linking means L1, L2 and then retransmitted in order to be broadcast by the passive speakers EP and / or active speakers EA.

[0131] Such identification of the linking means L1, L2 by the emission of a tone facilitates the user's interaction with the system.

[0132] Since it has all the necessary information, including the available stereo audio sources SA1, SA2, SA3, SA4 and the broadcast configuration file K, the hub H can optionally confirm the successful completion of the process to the user. To do this, the hub H automatically activates the overall system volume to an initial sound level, preferably 50%, and converts a stereo ST acknowledgment file, available, for example, in its MH memory.

[0133] The hub H transmits the entire set of spatialized audio streams, in a synchronized wireless manner via the WISA protocol, to each link means L1, L2 respecting the planned broadcast configuration, these ultimately allow the broadcast of said spatialized audio stream by the passive EP and / or active EA speakers to which they are connected.

[0134] The spatialized audio stream is amplified by the relevant linking means Ll before being supplied to the passive speaker EP.

[0135] In all cases, once the system is fully started, the hub H initializes U3 according to step c) the audio connection with each linking means L1, L2, creating the corresponding WISA group.

[0136] The hub H can then receive U4 as provided in step d) any stereo ST content from a previously detected audio source SA1, SA2, SA3, SA4 and, based on the broadcast configuration obtained in step a), convert U5 according to step e) the received stereo ST content into a set of spatialized audio streams, each stream being associated with a single broadcast channel and consequently with a single linking means L1, L2.

[0137] The U6 transmission is carried out according to step f) in a synchronized manner and by the WISA wireless protocol, each spatialized audio stream being transmitted to each corresponding linking means L1, L2.

[0138] Finally, according to step g) each linking means L1, L2 provides U7 the spatialized audio stream which it receives via wired means F, G, to the passive speaker EP or active speaker EA to which it is connected, so that the latter broadcasts said spatialized audio stream.

[0139] Thanks to the X interface provided by the dedicated application available on his phone or tablet, the user can also enter configuration instructions such as sound calibration data, for example a modification of the overall volume of the system or the sound volume of a diffusion means EA, EP in particular, and transmit them to the concentrator H during use.

[0140] It is easily understood that this detailed description relates to a particular example of the realization and implementation of the present invention, but that in no way does this description have any limiting character to the object of the invention; on the contrary, its objective is to remove any possible imprecision or misinterpretation of the following claims.

[0141] Thus, it will be understood that the examples of audio source SA1, SA2, SA3, SA4, interface X, or broadcasting means EA, EP presented can vary considerably in their form and structure according to the needs.

[0142] Similarly, the reference signs placed in parentheses in the following claims are in no way intended to be limiting; these signs are solely intended to improve the intelligibility and understanding of the following claims and the scope of the protection sought.

Claims

Demands

1. An adaptive method for multichannel broadcasting between at least one stereo audio source (SA1, SA2, SA3, SA4) and at least one broadcasting means (EP, EA), said method being implemented by computer means and comprising the steps of: a) obtaining (U1) a broadcasting configuration relative to a set of linking means (L1, L2), each linking means (L1, L2) being connected by wire to a broadcasting means (EA, EP), the broadcasting configuration comprising for each linking means (L1, L2) a data set consisting of its index, its spatial positioning and the broadcasting channel assigned to it; b) detecting (U2) by a concentrator (H) at least one audio source (SA1, SA2, SA3, SA4) to which it is connected and / or capable of connecting; c) initializing (U3) the audio connection between the concentrator (H) and each linking means (L1, L2);d) receive (U4) at the hub (H) stereo content (ST) from a detected audio source (SA1, SA2, SA3, SA4); e) based on the resulting broadcast configuration, convert (U5) at the hub (H) the received stereo content (ST) into a set of spatialized audio streams and associate each stream with a single linking means (L1, L2); f) transmit (U6) synchronously and via a wireless protocol (W) each spatialized audio stream to each corresponding linking means (L1, L2); g) for each linking means (L1, L2), provide (U7) the spatialized audio stream, via wired connection (F, G), to the broadcasting means (EP, EA) to which it is connected, and broadcast said spatialized audio stream by said broadcasting means (EP, EA).

2. Method according to claim 1 further comprising, prior to step c) of obtaining a configuration, at least one step among: updating (01) of the concentrator (H), updating (02) of at least one linking means (L1, L2).

3. A method according to any one of the preceding claims, wherein the step of obtaining a broadcast configuration includes retrieving by the concentrator (H) the existing configuration (KE) saved in its memory (MH) as a configuration of broadcast or construction of a new configuration (KN), said construction comprising the sub-steps of: - a1) input of at least one new data triad and / or deletion of at least one data triad, the input comprising the sub-steps of: detection by the concentrator (H) of at least one linking means (L1, L2) not belonging to a configuration, obtaining a spatial positioning for each detected linking means (L1, L2) and assignment of a broadcast channel to the at least one detected linking means (L1, L2) according to the spatial positioning obtained; - a2) saving of the new configuration (KN) constructed according to step a1) in the memory (MH) of the concentrator (H); - a3) retrieval of the new configuration (KN) constructed from the memory (MH) of the concentrator (H), as a broadcasting configuration.

4. A method according to the preceding claim, wherein the step of obtaining a spatial positioning includes a substep of locating the linking means (L1, L2) by transmitting a chime command from the concentrator (H) to the linking means (L1, L2) and then by diffusing said chime by said diffusion means (EP, EA).

5. A method according to any one of the preceding claims, further comprising an acknowledgment step including a substep of volume activation at a first sound level and a substep of acknowledgment confirmation by conversion at the concentrator (H) of a stereo acknowledgment content (ST) into a set of spatialized audio streams and then by synchronized wireless transmission (W) of each spatialized audio stream to each linking means (L1, L2) and finally by broadcasting said spatialized audio stream by the broadcasting means (EA, EP) to which the linking means (L1, L2) is connected.

6. A method according to any one of the preceding claims, wherein a spatialized audio stream amplification step is carried out by the linking means (L1) before the spatialized audio stream (F, G) is supplied to the broadcasting means (EP).

7. A method according to any one of the preceding claims, wherein the audio stream set comprises between three and eight streams.

8. A method according to the preceding claim, wherein the synchronized wireless (W) transmission of at least one audio stream is carried out by the WISA protocol.

9. Adaptive multichannel broadcasting system between at least one stereo audio source (SA1, SA2, SA3, SA4) and at least one broadcasting means (EP, EA) by implementing the method according to any one of claims 1 to 8, comprising: - a hub (H) comprising a control unit (UH), a memory (MH), and a wireless transceiver (TH), said hub (H) being capable of receiving stereo content (ST) from an audio source (SA1, SA2, SA3, SA4), and of converting the received stereo content (ST) into a set of spatialized audio streams, a spatialized audio stream being associated with a spatial positioning correlated to a linking means;- at least one linking means (L1, L2) connected by wire to a broadcasting means (EP, EA), the linking means (L1, L2) comprising a control unit (UL), a memory (ML), a wireless transceiver (TL), and being capable of receiving a spatialized audio stream from the hub (H) and then transmitting the spatialized audio stream to the broadcasting means (EP, EA).

10. Multichannel broadcasting system according to the preceding claim, further comprising an interface (X) capable of receiving configuration instructions from the user, such as spatial positioning and / or sound calibration data, and of transmitting said instructions to the concentrator (H).

11. Multichannel broadcasting system according to any one of claims 9 to 10, wherein the linking means (L1, L2) transmits the spatialized audio stream to the broadcasting means (EP, EA) via a differential digital-to-analog converter.

12. Multichannel broadcasting system according to any one of claims 9 to 11, wherein the linking means (L1) comprises an amplification module (A) controlled by the control unit (UL) and connected to the broadcasting means (EP).

13. Multichannel broadcasting system according to any one of claims 9 to 12, wherein the audio streams are transmitted according to the I2S protocol and the data streams are transmitted according to the I2C protocol, within the hub (H) and at least one linking means (L1, L2).

14. Product computer program comprising instructions which, when the program is executed by computing means (UH, MH, UL, ML) of a system according to any one of claims 9 to 13, cause the system to implement the method according to any one of claims 1 to 8.

15. Non-transient data carrier readable by computer means (UH, MH, UL, ML) of a system according to any one of claims 9 to 13, on which is recorded the computer program product according to the preceding claim.

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