Adaptive multichannel audio distribution system and method

Abstract

The invention relates to an adaptive multichannel audio distribution method and system for distributing audio between at least one stereo audio source (SAI, SA2, SA3, SA4) and at least one audio output means (EP, EA), such as a passive or active speaker. The system comprises a hub (H) able to receive stereo audio content (ST) from at least one audio source (SAI, SA2, SA3, SA4), and at least one linking means (LI, L2) connected by a wired connection to an audio output means (EP, EA). The hub (H) is able to convert any stereo content (ST) into a set of spatialized audio streams, each stream being associated with and transmitted to a corresponding linking means (LI, L2) according to an established audio distribution configuration, while the linking means (LI, L2) supplies the speaker with the spatialized audio stream that it receives from the hub (H), with a view to distributing the stream. To this end, the preferred communication protocol between the hub (H) and each linking means (LI, L2) is the WISA protocol.

Description

[0001] Description

[0002] Title: Adaptive Multichannel Broadcasting System and Method

[0003] technical field

[0004] The present invention lies in the field of transforming stereo audio content into high-fidelity spatial sound, directly applicable to embedded systems.

[0005] State of Part

[0006] Current spatial sound systems require a centralized amplifier connected by cables to specific speakers. These configurations are often rigid, require compatibility between the amplifier and the speakers, and restrict installation flexibility. Among these systems, spatialization devices and processes offering good immersive quality, such as Dolby Atmos and DTS:X, are well-known.

[0007] However, these solutions are limited to content specifically mixed 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.

[0008] Furthermore, conventional wireless solutions, such as Bluetooth or Wi-Fi, do not meet the latency requirements for an immersive multi-speaker audio experience.

[0009] Thus, low-latency wireless streaming in multi-speaker configurations remains difficult with current solutions, due to the imperative synchronization of audio channels.

[0010] In order to bring a little more flexibility by the possibility of separately defining a number of channels of the sound content as well as a number of loudspeakers constituting the installation, the 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.

[0011] To implement the solution outlined in document WO2023232586A1, user intervention remains essential for the precise configuration of their audio equipment, particularly by determining the geometry of the virtual space and the number of speakers they wish to use, or by selecting a predetermined virtual space from a database. Furthermore, most existing systems do not support simple stereo sources, such as those broadcast via analog media, which require strict compatibility with standards and equipment.

[0012] 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.

[0013] Summary of the invention

[0014] The invention aims to improve the situation described above.

[0015] 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.

[0016] Another aim of the invention is to offer a system and a method that do not depend on specially mixed content.

[0017] Another aim of the invention is to offer 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.

[0018] Another aim of the invention is to provide a system and a method for spatializing any stereo content without using compatible equipment or content.

[0019] Finally, another aim of the invention is to provide a system and a method enabling the transformation and wireless distribution of high-fidelity spatial sound working with any type of active or passive audio speaker, with synchronized transmission and no perceptible latency for an optimal immersive experience.

[0020] 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.

[0021] To this end, the adaptive multichannel broadcasting method between at least one stereo audio source and at least one broadcasting means according to the invention comprises the steps of: a) obtaining a broadcasting configuration relative 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 set consisting of its index, its spatial positioning and the broadcasting channel assigned to it; b) detecting by a concentrator at least one audio source to which it is connected and / or capable of connecting; c) initializing the audio connection between the concentrator and each linking means; d) receiving at the concentrator stereo content from a detected audio source;e) based on the resulting broadcast configuration, convert the regulated stereo content at the hub into a set of spatialized audio streams and associate each stream with a unique linking means; f) transmit each spatialized audio stream synchronously and via a wireless protocol to each corresponding linking means; g) for each linking means, provide the spatialized audio stream, via a wired connection, to the broadcasting means to which it is connected, and broadcast said spatialized audio stream via said broadcasting means.

[0022] The implementation of the method takes place within the adaptive multi-channel diffusion system between at least one stereo audio source and at least one diffusion means as provided according to the invention.

[0023] The multichannel broadcast system includes:

[0024] - a hub comprising a control unit, a memory, and a wireless transceiver, said hub being capable of receiving stereo content or streams 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;

[0025] - at least one means of connection connected by wire to a means of dissemination, the means of connection comprising a control unit, a memory, a wireless transceiver, and being capable of receiving a spatialized audio stream from the concentrator and then transmitting the spatialized audio stream to the means of dissemination.

[0026] The hub and the linking means each advantageously comprise a control unit, a memory and a wireless transceiver.

[0027] According to the invention, a single linking means is connected to a single diffusion means.

[0028] Wireless transceivers are advantageously compatible with all types of wireless technology, and more particularly WISA, Wifi or Bluetooth.

[0029] The concentrator control unit 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.

[0030] The hub and the linking means each include memory enabling local data storage, such as configuration data or sound calibration data.

[0031] 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.

[0032] 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 users the possibility of keeping their existing equipment and varying the media used for listening, for example: a television, a computer, a tablet, a turntable, a digital disc player, or a "Cast" type connector.

[0033] Each means of connection consists of a very small box, connected by wire to a means of diffusion such as a passive speaker or an active speaker.

[0034] Advantageously, each link means is capable of receiving a spatialized audio stream from the hub via wireless technology and transmitting the spatialized audio stream via wired means of broadcasting.

[0035] Preferably, the linking means transmits the spatialized audio stream by means of broadcasting through a differential digital-to-analog converter.

[0036] In embodiments of the invention employing at least one passive diffusion means such as a passive speaker, the linking means advantageously comprises 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.

[0037] Preferably, the audio streams passing through the system equipment, i.e., between their components, within the hub, and via at least one link, whether stereo or spatialized streams, are transmitted according to the I2S protocol. Preferably, the data streams passing through the system equipment, i.e., between their components, within the hub, and via at least one link, are transmitted according to the I2C protocol. Furthermore, the multichannel broadcasting system according to the invention may also include an interface, such as a tablet or a telephone, capable of receiving configuration instructions from the user, such as spatial positioning and / or sound calibration data, and of transmitting said instructions to the hub.

[0038] The interface can also be used as an audio source capable of providing stereo content for broadcast.

[0039] In order to achieve adaptive multichannel broadcasting within the system between at least one audio source and at least one means of broadcasting, the method provides for various steps governing communication between the equipment.

[0040] According to step a), the process thus provides for obtaining a dissemination configuration for all the linking means. Such a dissemination configuration includes, for each linking means, a data trinomial consisting of:

[0041] - its index, such as its label or product number;

[0042] - its spatial positioning, such as "front left", "front center", "front right", "lateral left", "lateral right", "rear left", "rear center", "rear right", "ceiling left", "ceiling right", 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;

[0043] - the broadcast channel assigned to it by the hub or by the user during the step of building a new configuration.

[0044] Preferably, step a) of obtaining a broadcast configuration includes:

[0045] - either the retrieval by the concentrator of the existing configuration saved in its memory, the existing configuration then corresponding to the broadcast configuration, such a case occurring essentially during the routine use of the system and the process, the user using at least for a certain time the same equipment in the same locations,

[0046] - 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 causes the need for 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 of the system.

[0047] To this end, the construction of a new configuration advantageously includes the substeps of: - a) adding at least one new trinomial of data and / or deleting at least one trinomial of data;

[0048] - a2) saving the new configuration built obtained in step a1) in the memory of the concentrator;

[0049] - a3) retrieval of the new configuration built from the memory of the concentrator, the new configuration built then corresponding to the broadcast configuration.

[0050] In practice, the addition of at least one new set of three data points includes the following substeps:

[0051] - detection by the concentrator of at least one link means not belonging to a configuration, the detection is preferably carried out by a link discovery protocol such as the LDP protocol (in English: "Link Discovery Protocol");

[0052] - 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 concentrator;

[0053] - assignment of a broadcast channel to at least one means of connection detected according to the spatial positioning obtained, by the concentrator or by the user.

[0054] To facilitate the 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 through said broadcasting means. Naturally, the link acts as an intermediary and transmits the chime to said broadcasting means. A "chime" is understood to be an audio track in the form of a brief notification enabling the human user to locate and identify the link and thus the speaker to be characterized with regard to its spatial positioning.

[0055] Therefore, 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 performed by mapping the inputs supporting the I2S protocol and connected to the digital signal processor of the hub's control unit.

[0056] Of course, the order in which steps a) and b) are performed is not important. Once steps a) and b) have been completed, a step c) initializes the audio connection between the hub and each linking device, during which the microcontroller of the hub's control unit creates the WiSA network or group that includes the hub and at least one linking device.

[0057] In order to user-friendly confirm to the user the success of the installation and / or system start-up and / or any other step, and for example as a test guide, the process 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.

[0058] The system is then ready to convert the stereo content and play back the spatialized sound. The process includes:

[0059] - a stage d) of reception at the level of the concentrator, preferably at the level of the digital signal processor, of stereo content from a previously detected audio source;

[0060] - a step d) of conversion, based on the broadcast configuration obtained, at the level of the stereo content concentrator, into a set of spatialized audio streams and association of each spatialized audio stream with a single linking means, most preferably the set of audio streams comprises between three and eight streams;

[0061] - a step f) of transmission in a synchronized manner and by a wireless protocol, preferably by the WISA protocol, of each spatialized audio stream to each corresponding means of connection;

[0062] - a step (g) for each linking means, of providing the spatialized audio stream, via wired connection, to the broadcasting means to which it is connected and of broadcasting said spatialized audio stream. Preferably, a spatialized audio stream amplification step is carried out by the linking means before step (g) of providing the spatialized audio stream to the broadcasting means when the latter is a passive broadcasting means.

[0063] To ensure optimal operation, the process preferably includes, prior to step a) obtaining a configuration, at least one of the following steps:

[0064] - hub update;

[0065] - Updating at least one connection method. Updating the hub and / or at least one connection method consists of updating the software of the computer program stored in each respective microcontroller. These updates ensure, in particular, access to the latest generation functionalities as well as the resolution of any malfunctions.

[0066] Advantageously, the hub update is triggered by itself, based on a comparison of the available software version.

[0067] Advantageously, the update of at least one link medium is proposed and / or triggered following verification by the concentrator of the availability of such an update for said link medium, based on a comparison of the software version. If needed, at least one link medium receives the update:

[0068] - by transmission according to the I2S protocol, and / or

[0069] - via a wired connection, for example via a USB cable, and / or

[0070] - via wireless transmission, preferably using the WISA protocol, from the hub. Preferably, the hub and / or at least one connection method is updated via a wired connection, for example via a USB cable.

[0071] Preferably, the update is regulated by at least one means of connection via wireless transmission using the WISA protocol, from the hub.

[0072] 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.

[0073] 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.

[0074] As explicitly stated, the method and system according to the invention are perfectly suited to home audio systems such as home cinema, 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 enables 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

[0075] 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 any limiting character and on which: [Fig- 1]

[0076] Figure 1 represents the system according to the invention;

[0077] [Fig- 2]

[0078] Figure 2 represents the process according to the invention;

[0079] [Fig- 3]

[0080] Figure 3 represents an embodiment of a connecting means according to the invention.

[0081] Detailed description

[0082] An embodiment of the device according to the invention is presented below with reference to figures 1 to 3.

[0083] In the proposed configuration and as illustrated in Figure 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 SAI, SA2, SA3, SA4 capable of providing stereo content ST:

[0084] - wired, for example: a television SAI connected by HDMI cable, an external data storage device SA2 connected by USB-C cable, a turntable SA3 connected by RCA cable;

[0085] - by wireless technology, for example to an SA4 computer;

[0086] - via wired and / or wireless technology V, has an interface X such as a smartphone; and connect on the other hand at the output:

[0087] - wired, for example via optical O, to an output device such as a soundbar B in order to assign audio channels to it;

[0088] - by a wireless technology W, has as many means of LI, L2 connection as passive EP speakers or active EA speakers.

[0089] The wired connection to audio sources does not present any constraints for the user, since the location of these sources is rarely called upon to be changed and they are most often grouped together to minimize clutter in a home or performance hall.

[0090] It is indeed common practice to place an SA4 DVD player and / or an SA2 game console directly under the SAI television, whereas during their use, an immersive sound experience (known as "surround sound") is crucial. To achieve this, speakers such as the B soundbar and the EA and EP speakers must instead be distributed around the room to effectively surround the listener, and the presence of cables can become problematic. The solution proposed by the invention frees the user from the need for multiple, often unsightly, and sometimes lengthy cables connecting the control system to the speakers across the room.

[0091] The user will be able to distribute their diffusers according to their preferences without placement restrictions and associate them respectively by wired connection with an external LI, L2 link which makes them compatible with a wireless transmission technology.

[0092] Users are therefore not obligated to replace their equipment to maintain a high-performing system, which offers both economic and environmental advantages. Indeed, the H hub transforms any stereo content into immersive spatial sound, without requiring prior mixing or specific configurations. Compatibility with both analog and digital sources ensures broad accessibility.

[0093] For this purpose, the hub 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 local data, such as configuration data or sound calibration data, and a wireless transceiver TH.

[0094] Each LI, L2 link comprises a control unit (UL) implementing a microcontroller capable of storing the computer program necessary for the proper execution of the process, a memory unit (ML) capable of storing local data, such as configuration or sound calibration data, and a wireless transceiver (TL). The LI, L2 link components are compatible with all types of speakers, thanks to integrated connector support, and communicate effectively via W wireless transmission using the WISA protocol with the hub (H), which is equipped with a wireless transceiver (TH).

[0095] The WISA protocol guarantees the user a synchronized transmission with no perceptible latency, less than 5ms, for an optimal immersive experience. Each LI, L2 connection method is a small box that the user connects via a wire to a passive EP or active EA speaker to transmit the spatialized audio stream regulated from the hub H. It is powered by a wired connection C to the mains for independent operation. The user chooses an LI connection method with an amplification module A when equipping one of their passive EP speakers, while they choose an L2 connection method without amplification functionality when equipping an active speaker. As illustrated in Figure 3, the amplification module A is controlled by the UL control unit and connected to the passive EP speaker.

[0096] Such a principle of integrating amplification at the level of each link means LI, L2 makes the use of a central amplifier obsolete.

[0097] Preferably, the LI, L2 link means transmits the spatialized audio stream to the EA, EP speaker via a differential digital-to-analog converter (DAC).

[0098] Once the H hub is connected to the audio sources SAI, SA2, SA3, SA4 and the LI, L2 link means are connected to the speakers EA, EP, the user will be able to initialize and / or start the system.

[0099] In order to fully adapt the installation to their 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.

[0100] With this arrangement, the user can configure and use the entire system, via the H hub, notably with the help of a dedicated application.

[0101] The X interface provided by the smartphone can also constitute an audio source capable of providing stereo ST content for broadcast.

[0102] 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 included, allowing for complete customization of the audio experience.

[0103] Depending on the needs, automatically or at the user's request, various optional steps can be implemented during system startup, such as an update 01 of the H concentrator and / or an update 02 of at least one LI, L2 linking means.

[0104] A detection U2 of the available stereo audio sources SAI, SA2, SA3, SA4 is then carried out during step b) by the concentrator H, for example simultaneously with step a) obtaining U1 of a broadcast configuration relating to the set of linking means L1, L2. This broadcasting configuration consists of a file K grouping trinomials of data associating, for each linking means LI, L2, its index, its spatial positioning and the broadcasting channel associated with it.

[0105] In routine use, the K broadcast configuration is the same each time the system is used. The existing KE configuration can be retrieved from MH memory or it has been saved by the H concentrator.

[0106] During the initial installation or when modifying the system, the user manages the number and positioning of the L1 and L2 links, for example by adding, swapping, or deleting them. The K configuration file for the broadcast must then be entirely created or modified before being saved.

[0107] To achieve this, building a new KN configuration involves several sub-steps. When an LI, L2 link is added, the hub H detects its presence, and then the user can declare their spatial position via the application on their smartphone. The hub H then assigns a broadcast channel to this LI, L2 link. A new data trinomial is then added to the K configuration file.

[0108] When an LI, L2 link means is deleted, the corresponding data trinomial is deleted from the broadcast configuration K file.

[0109] Once the additions or deletions are complete, the newly constructed KN configuration is saved in the MH memory of the H concentrator, and then retrieved as the broadcast configuration to be used.

[0110] In order to assist and guide the user in declaring the spatial positioning of each LI, L2 linking means, the concentrator H can, for each LI, L2 linking means it has detected, transmit a chime command to it, which will be received by said LI, L2 linking means and then retransmitted in order to be diffused by the passive EP and / or active EA speakers.

[0111] Such identification of the LI, L2 linking means by the emission of a tone facilitates the user's interaction with the system.

[0112] Therefore, since it has all the necessary information, including the available stereo audio sources SAI, SA2, SA3, SA4 and the K broadcast configuration file, the H hub can confirm the successful execution of the process to the user. To do this, the H hub 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.

[0113] The H hub transmits the entire spatialized audio stream, in a synchronized wireless manner via WISA protocol, to each LI, L2 link means respecting the planned broadcast configuration, these ultimately allowing the broadcast of said spatialized audio stream by the passive EP and / or active EA speakers to which they are connected.

[0114] The spatialized audio stream is amplified by the relevant LI link means before being supplied to the passive EP speaker.

[0115] In all cases, once the system is fully started, the hub H initializes U3 according to step c) the audio connection with each LI, L2 linking means, creating the corresponding WISA group.

[0116] The hub H can then receive U4 as provided in step d) any stereo ST content from a previously detected audio source SAI, SA2, SA3, SA4 and, based on the broadcast configuration obtained in step a), convert U5 according to step e) to the stereo ST content into a set of spatialized audio streams, each stream being associated with a unique broadcast channel and consequently with a unique linking means LI, L2.

[0117] 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 LI, L2 link means.

[0118] Finally, according to step g) each linking means LI, L2, provides U7 the spatialized audio stream which it receives by 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.

[0119] 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 means of diffusion EA, EP in particular, and transmit them to the hub H during use.

[0120] 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 claims that follow.

[0121] Thus, it will be understood that the examples of audio source SAI, SA2, SA3, SA4, interface X, or broadcasting means EA, EP presented can vary considerably in their form and structure according to the needs.

[0122] Similarly, the reference signs placed in parentheses in the following claims are in no way 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 multichannel broadcasting method between at least one stereo audio source (SAI, 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 (LI, L2), each linking means (LI, L2) being connected by wire to a broadcasting means (EA, EP), the broadcasting configuration comprising for each linking means (LI, L2) a trinomial of data 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 (SAI, SA2, SA3, SA4) to which it is connected and / or able to connect; c) initializing (U3) the audio connection between the concentrator (H) and each linking means (LI, L2);d) receive (U4) at the hub (H) stereo content (ST) from a detected audio source (SAI, 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 unique linking means (LI, L2); f) transmit (U6) synchronously and via a wireless protocol (W) each spatialized audio stream to each corresponding linking means (LI, L2); g) for each linking means (LI, 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 via said broadcasting means (EP, EA).

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

3. A method according to any one of the preceding claims, wherein the step of obtaining a broadcast configuration comprises retrieval by the concentrator (H) of the existing configuration (KE) saved in its memory (MH) as a broadcast configuration or the construction of a new configuration (KN), said construction comprising the substeps of: - a) adding at least one new data set and / or deleting at least one data set, the addition including the sub-steps of: detection by the concentrator (H) of at least one linking means (L1, L2) not belonging to a configuration, obtaining spatial positioning for each linking means (LI, L2) detected and assignment of a broadcast channel to at least one linking means (LI, L2) detected according to the spatial positioning obtained; - a2) saving the new configuration (KN) built sei on step a1) in the memory (MH) of the concentrator (H); - a3) retrieval of the new configuration (KN) built from the memory (MH) of the concentrator (H), as a diffusion 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 (LI, L2) by transmitting a chime command from the concentrator (H) to the linking means (LI, 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 level (H) of a stereo acknowledgment content (ST) into a set of spatialized audio streams and then by synchronous wireless transmission (W) of each spatialized audio stream to each linking means (LI, L2) and finally by broadcasting said spatialized audio stream by the broadcasting means (EA, EP) to which the linking means (LI, L2) is connected.

6. A method according to one of the preceding claims, wherein a spatialized audio stream amplification step is carried out by the linking means (LI) 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 (SAI, 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 (SAI, 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 (LI, L2) connected by wire to a broadcasting means (EP, EA), the linking means (LI, L2) comprising a control unit (UL), a memory (ML), a wireless transceiver (TL), and being capable of receiving a spatialized audio stream from the concentrator (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 (LI, 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 (LI) 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 (LI, L2).

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