FR3096476A1 - Method of adjusting a playback device based on the position of a user - Google Patents

Abstract

Method for adjusting at least one rendering device as a function of an adjustment instruction for rendering a content, the method comprising: - obtaining a current data set comprising one or more current data, at least a current datum being representative of a current signal received by a radio wave receiver of at least one first device and transmitted by a radio wave transmitter of at least one second device, - a comparison of the set of current data obtained with a plurality of sets of reference data, each set of reference data comprising one or more reference data, at least one reference data being representative of a reference signal received by said radio wave receiver said first equipment and emitted by said radio wave transmitter of said second equipment in the presence of a user positioned in a space covered by a range of said em radio wave detector, an indication of the position of said user at the time of reception of said reference signal being associated with each of the reference data, and - a determination of said adjustment setpoint as a function of said comparison. Abstract figure: Figure 1

Description

Description Title of the invention: Method of adjusting a rendering device based on the position of a user Technical field

The present disclosure relates to the field of adjustment of playback devices.

[0002] More particularly, the present disclosure relates to a method for adjusting a rendering device, to a computer program comprising instructions for carrying out such a method, to a storage device comprising instructions for performing such a method, to a processing circuit configured to execute such a method, to a gateway comprising such a processing circuit and to an installation comprising such a processing circuit.

Prior art

It is known from commercial solutions of personal assistants to respond to the requests of a user in a localized manner, by selecting the personal assistant closest to the user at the time of the voice command: the waves sound are then used to estimate the user's distance to potential multiple assistants present in the house, and the closest assistant is selected to broadcast the response to the command.

These solutions make it possible to adapt the broadcast volume to the user's request, statically, that is to say by a specific request from the user, such as "Set the volume to 40%".

However, such an approach does not take advantage of the user's location context.

[0004] In other fields, adaptive broadcasting solutions use user location information to adapt the broadcasting volume of a device.

[0005] The location information can be acquired by means of an external or worn location device which communicates with the broadcasting system to indicate the estimated position of the user and to allow the calculation of the sound volume adapted to his. position.

[0006] However, the location of a user via a worn device is not very appropriate in a conventional habitat where the inhabitants do not always wear a connected device S Ur them.

[0007] Alternatively, the location of a user via an external device is complex to install and can hardly be set up in an environment representative of a conventional habitat.

[0008] There is a need for a solution for adjusting a reproduction device combining simple installation, high precision and ease of use.

2 Summary 100091 This disclosure improves the situation. 100101 11 is a method of adjusting at least one rendering device as a function of an adjustment setpoint for rendering a content, the method comprising: - obtaining a current set of data comprising one or more current data, at least one current data item being representative of a current signal received by a radio wave receiver of at least one first device and transmitted by a radio wave transmitter of at least one second device, - a comparison of the current data set obtained with a plurality of reference data sets, each reference data set comprising one or more reference data, at least one reference data item being representative of a reference signal received by said reference data radio wave receiver of said first equipment and emitted by said radio wave transmitter of said second equipment in the presence of a user positioned in a covered space t by a range of said radio wave transmitter, an indication of the position of said user at the time of reception of said reference signal being associated with each of the reference data, and a determination of said adjustment setpoint as a function of said comparison.

In the context of the invention, the terms "a space covered by a range of said radio wave transmitter" are defined relative to: - the position and power of said radio wave transmitter, - noise ambient radio frequency, - and the position and detection limit of said radio wave receiver.

The user is positioned in said space when the current disturbance, linked to the presence of the user, of the radio wave emitted by said radio wave transmitter and received by said radio wave receiver is perceptible and quantifiable.

[0013] Thus, the reproduction device is set for the broadcasting of content when a user is detected by comparing a current datum with a plurality of reference data, the current datum making it possible to quantify a current disturbance of the radio wave linked to the presence of the user and the reference data making it possible to quantify, for example, the different disturbances that can generally be induced by the presence of the user located in respective positions of a given space.

[0014] For example, this given space can be a housing and the disturbance on the aforementioned radio wave, as currently detected, can make it possible to determine whether the user is at a current time in the housing or not. .

Thus, in general, the result of the comparison between: - on the one hand the current set of data, obtained, and - on the other hand the sets of reference data associated with possible position indications of the user, makes it possible to detect the presence of the user at any time in a given space for example.

[0016] Moreover, the detection of the user can be implemented without requiring a complex installation and while providing great comfort of use thanks to such an embodiment.

Indeed, the detection of the user by deformation of a radioelectric field does not require the use of any worn or dedicated device.

Typically, it is possible to use pre-existing equipment and usually capable of broadcasting a radioelectric field to detect the user.

This equipment corresponds, for example, to a domestic gateway or even a smartphone or even a connected wireless playback device, capable of communicating with other playback devices as a master to generate an adjustment instruction for the other devices and thus control their. functioning.

An adjustment instruction for a restitution of a content designates an instruction for adapting a setting or a parameter of an apparatus with a view to restoring a content such as an audio and / or visual signal.

[0018] Such a device for rendering content may for example comprise: - a loudspeaker for rendering audio content, and / or - a display for rendering visual content.

[0019] In one embodiment, the method further comprises determining an indication of the user's current position in said space as a function of said comparison, and the aforementioned adjustment setpoint is determined on the basis of said indication. current position.

Thus the reproduction device (s) are adjusted on the basis of the current position of the user which can be commonly determined by comparison of the current disturbance of the radio wave linked to the presence of the user, for example at the base of the aforementioned different disturbances.

Returning to the aforementioned example of the housing, the latter comprising different rooms and the user being in a particular room at a current instant, the disturbance on the aforementioned radio wave, as currently detected, can make it possible to determine in which room the user is located at this current moment.

Thus, in general, the result of the comparison between: - on the one hand the current set of data, obtained, and - on the other hand the sets of reference data associated with possible position indications of the user, makes it possible to determine an indication of the user's current position at any time in a given space for example.

Continuing the example of the aforementioned housing, the user can for example predefine a type of content to be returned when it is located in a particular room.

The content to be rendered can for example designate a visual or musical atmosphere.

The indication of the user's position, as currently determined, can make it possible to determine whether the user is located in this room and to select the predefined content (as “adjustment setpoint”) for reproduction by the user (s). housing restitution systems.

[0024] According to another example, an installation comprising different wave transmitters and receivers can be located in a museum in which a user moves from room to room and stops in front of a screen.

Based on the determination of an indication of the user's current position facing the screen, the installation can activate a projector to display content on the screen or broadcast audio content in the room where is located the user.

Likewise, the user can further wear an audio headset and audio content can be broadcast through the headset based on the user's current position indication.

In a particular embodiment of such an embodiment, the aforementioned adjustment setpoint is further determined on the basis of a position of said at least one reproduction device.

Thus, the adjustment of the or each rendering device is adapted to the respective position of the rendering device or devices.

Typically, taking the example of a user in a housing comprising several rooms, if the content to be restored has a sound component and the user is currently located in a room without a sound reproduction device, it may be provided for example to amplify the high-pitched sounds coming from the sound reproduction devices of the home because the walls of the home usually operate as a low-pass filter on the sound.

In addition, the sound level can be adjusted according to the distance between the user and the playback devices.

This distance can be calculated from the position obtained from the sound reproduction device and from the position indication of the user as currently determined.

If the content to be rendered has a visual component and the user is currently located in a room in which a visual rendering device is also located, then it can be provided for example that only this visual rendering device is ordered.

In one embodiment, the reproduction may be sound and the adjustment instruction may for example comprise an instruction relating to at least one element of a list comprising an amplification, an equalization of frequencies, a temporal phase shift of the sound content, a type of sound content to be rendered.

[0032] Thus, it is possible, using a setting instruction, to control the sound reproduction devices in order to select and restore predefined musical content.

Thus, for example when the user enters his home, his presence is detected by comparing the current disturbance with a plurality of reference disturbances, and it is possible to restore a preselected musical atmosphere, for example in the entrance of the accommodation.

It is also possible with the aid of an adjustment instruction to control the sound volume of the sound reproduction devices so that only the devices located near the current position of the user, for example located in the same room as the user at the current time, broadcast the sound content, to minimize the overall electrical consumption of the installation.

It is also possible using a setting instruction to amplify for example the low sound frequencies in the room where the user is located at the current time and rather amplify the algae sound frequencies in others parts so that the user has a harmonized sound experience between the different sources of reproduction of the same content.

Furthermore, it is also possible to phase the sound in the other rooms so that the user perceives the different sounds at the same time.

In one embodiment, said current signal and said reference signals received by said radio wave receiver of said first device are also transmitted by a radio wave transmitter of a third device.

Thus, the comparison between the current and reference signals received by the radio wave receiver of the first equipment item makes it possible to compare a current radio frequency scene with a plurality of reference radio scenes.

For the purposes of the invention, a "radio scene" denotes, by analogy with a sound scene, a virtual representation of a space surrounding a radio wave receiver established on the basis of a disturbance of at least one radio wave received by the radio wave receiver and transmitted by at least one radio wave transmitter.

A radioelectric scene is affected by the distance between the radioelectric wave transmitter and the radioelectric wave receiver as well as by any element liable to affect the propagation of the waves by absorption, reflection or diffusion, such as the presence of a user's body.

In this embodiment, a plurality of signals being transmitted by different transmitters, the current radioelectric scene and the reference radioelectric scenes are each two-dimensional or three-dimensional.

In one embodiment, said current signal and said reference signals received by said radio wave receiver of said first device are also received by a radio wave receiver of a third device.

Thus, the signal received by each radio wave receiver corresponds to a different perception of the same signal emitted by the radio wave transmitter.

The signal received by each of the radio wave receivers is in particular affected differently, for example by the presence of the user in a given position.

Returning to the example of the housing, the first equipment and the second equipment can be located in a first room of the housing and the third equipment can be located in a second room of the housing.

In this example, the user moves into the housing from the first room to the second room.

The radio wave transmitter of the second equipment emits a continuous radio wave.

Thus, initially the radio wave receiver of the first equipment initially receives a signal strongly disturbed by the presence of the user in the first room, then when the user moves to the second room, the signal is weaker. disturbed.

Conversely, initially the radio wave receiver of the third device initially receives a signal weakly disturbed by the presence of the user in the first room, then when the user moves to the second room, the signal is more strongly disturbed.

Thus by comparison with a base of reference disturbances corresponding to the various possible positions of the user in the first room and in the second room, it is possible to accurately determine the current position of the user.

In general, it is possible to determine the position of the user with increased precision by taking into account several transmitting devices with respect to a comparison of a current disturbance of a single radio wave with a plurality of disturbances of reference of a single radio wave.

Thus, the indication of the user's current position can be particularly precise and the setting can be particularly suited to the user's current position.

For example, when the user moves in a room, the adjustment of the sound volume and the equalization of frequencies can for example be constantly adapted so that the user does not perceive any distortion.

In one embodiment, - the current data set comprises a plurality of current data, each current data being representative of a current signal transmitted in a respective frequency band 7, - and the comparison comprises a comparison of each data current with the plurality of reference data sets.

Typically, the various radiofrequency communication protocols (WiFi, Zigbee, Bluetooth, DECT in particular) operate respectively in one or more frequency ranges.

The waves received by the radio wave receiver (s) at the current time according to a predetermined frequency band can constitute a current data subset of which the propagation disturbance can be representative of the current position of an user.

Thus, the comparison of this current subset of data with the aforementioned reference disturbance base can make it possible to determine an indication of the user's position.

Therefore, the current position of the user in a given space can be evaluated on the basis of a plurality of current position indications obtained respectively by comparing a current disturbance in a predetermined frequency band with reference disturbances.

The plurality of position indications provides an overlap making it possible to refine the evaluation of the current position of the user.

In addition, the user can thus be located even if his current position is located in a white zone for part of the radio frequencies transmitted and received.

In one embodiment: - the or each current datum comprises a current channel state information representative of a propagation of said current signal, - each reference datum comprises a reference channel state information representative of a propagation of said reference signal, - and said comparison of said at least one current datum with the plurality of reference data comprises a comparison of the or each current channel state information with the plurality of said reference channel state information .

In general, the channel state information describes the propagation of radio waves between the wave transmitters and the wave receivers.

The channel state information includes information relating to the amplitude and phase of the received signals which are indicative of a combined effect, for example of diffusion and / or attenuation of radio waves. , a function of both: - the distance between the wave transmitters and the wave receivers, - and the environment, including for example elements capable of diffusing radio waves, such as a user in a position or furniture, and items that may reflect radio waves, such as walls, ceilings or floors.

Thus, in this embodiment, each radio scene (current and reference) is specific to a particular configuration of the environment, and in particular to the position of the user.

Thus, the current position of the user can be determined in a given space with an accuracy for example of the order of 50 cm to one meter, depending on: - the number of transmitters and wave receivers , - their relative arrangement with respect to the user, and - the number of reference disturbances associated with possible indications of the user's position in said given space.

In one embodiment, the method further comprises a calibration, during which, for a plurality of positions of a user in the space covered by the range of said at least one radio wave transmitter: - said reference signal is received in the presence of said user in said position, - a reference data set comprising at least one reference data is obtained on the basis of said received reference signal, - and said obtained reference data set is associated with said position.

Thus, it is possible to determine the current position of the user by relying on a plurality of reference data sets acquired by sampling, for example in the form of a reference database, each assembly comprising at least one piece of data representative of a disturbance corresponding to a predefined position of the user within the range of action of the plurality of rendering devices.

[0061] For example, the sampling can be carried out by positioning the user successively in different predefined positions in a given space.

By way of example, for each predefined position, one or more radioelectric wave transmitters can emit a wave which is then received by one or more radioelectric wave receivers, the propagation of the radioelectric wave between the or each transmitter and the or each receiver being potentially disturbed by the presence of the user positioned in said predefined position.

The disturbance of the wave thus received by one or more radio-electric wave receivers for a predefined position of the user is a reference disturbance providing a reliable point of comparison with a current disturbance in order to determine the current position of the user.

According to another aspect, there is proposed a processing circuit comprising a processor connected to a memory and to at least one communication interface with a plurality of rendering devices, the processing circuit being configured to perform the steps of 'a method above.

Thus, such a processing circuit is configured to adjust a reproduction device according to an embodiment of the above method.

For the purposes of the invention, such a processing circuit designates any circuit capable of and configures to determine an instruction for rendering content intended for a user and for transmitting this instruction to a rendering device.

For the purposes of the invention, such a reproduction device designates any device capable of and configured to receive said adjustment instruction, for example for the purpose of applying said adjustment instruction to a loudspeaker.

Examples of playback devices include, but are not limited to, smartphones, tablets, televisions, computers, connected objects, connected assistants, connected Hi-Fi systems, connected speakers, network gateways (“box” type or other) or remote computing units, for example computing units hosted in a cloud infrastructure.

As illustrated in FIG. 3, such a processing circuit CT can comprise, by way of example: an input interface IN for receiving (Rcc) a radio wave affected by a current disturbance linked to the presence of the 'user located in a current position, - an output interface OUT for transmitting (Em) a radio wave, - a memory MEM to store in particular the radio wave received, a base (DB) of reference disturbances, each reference disturbance being associated respectively with a predefined position of the user, and the data of a computer program described below; a processor PROC cooperating with the memory MEM to read the program data and execute the above adjustment method; - And a communication interface INT for delivering the adjustment setpoint determined by the adjustment method and intended to adjust a playback device DR.

Typically, such a processing circuit CT is incorporated in an item of equipment by nature or used as a master, capable of controlling all of the restitution devices of an installation for the implementation of the current step of determining the adjustment setpoint.

Control by master equipment makes it possible in particular to synchronize the transmission of adjustment instructions, determined by the processing circuit CT, each of the reproduction devices and thus provide a harmonious sound environment to the user when the reproduction is sound.

In one embodiment, the master equipment is separate from the DR rendering devices.

100721 In one embodiment, the processing circuit CT can be incorporated into a gateway GW of a local radio frequency network, capable of radiating via the communication interface INT a radio wave carrying a sequence of instructions intended to control the or each device of restitution DR.

In one embodiment, the or each rendering device being equipped with a radio communication module comprising a radio wave transmitter and a radio wave receiver, the communication interface of the processing circuit CT is arranged to communicate by radio link with the or each communication module.

Thus, the radio waves emitted by the pre-existing means of wireless connection of the equipment of the installation are at the same time: - the waves for which the current disturbance of the propagation is determined - and the vector of transmission of the instructions of adjustment to the DR playback devices.

In one embodiment, the master equipment is itself a playback device.

In this case, the processing circuit CT and the rendering device DR can designate one and the same entity.

For example, this entity can be an amplifier connected and linked to one or more loudspeakers and integrate both a processing circuit CT of the aforementioned type and loudspeakers as “reproduction devices” DR.

In such an embodiment, the communication interface INT is optional, or can designate a simple electrical or electronic circuit, configured to transmit the adjustment setpoint determined by the processing circuit CT to the loudspeakers.

Likewise, these speakers can be located in different rooms of a home for example, and the signal for a speaker located in a room where the user is not currently present can be amplified in frequencies. acute.

Thus, the aforementioned “adjustment setpoint” can be calculated by the processing circuit which then delivers the signals sent to the loudspeakers.

Brief description of the drawings

Other characteristics, details and advantages will emerge on reading the detailed description below, and on analyzing the appended drawings, in which: FIG.

1 100771 Ifi2.1 I illustrates a system comprising a plurality of equipment items in which the adjustment method is implemented.

Fig.

2 100781 I fiel] illustrates a form of flowchart of a general algorithm of a computer program, in an exemplary embodiment, for implementing the proposed method.

11 Fig.

3 100791 Ifie.31 schematically illustrates the structure of a processing circuit, in an exemplary embodiment, for implementing the proposed method.

Description of the embodiments

Reference is made to FIG. 1 illustrating a system arranged in an environment, for example an enclosed space such as a housing, comprising for example several rooms.

The system comprises a plurality of items of equipment according to one embodiment of the invention.

In the example shown, the equipment is connected by a wireless local area network 70.

The main wireless LAN standards are Wi-Fi, Bluetooth, Zigbee, Z-Wave and DECT.

To maintain such a local network, each of the items of equipment comprises a transmission / reception device comprising at least one radio wave transmitter and at least one radio wave receiver.

The transmission / reception devices are. compatible with each other, that is to say capable of communicating with each other, and may correspond to a single or to a plurality of wireless local area network standards.

100851 Thus, the transmitted and received radio waves can be of different types, each type of radio wave possibly corresponding, for example, to a wireless local area network standard or to a given frequency band.

100861 For example: - the Wi-Fi, Bluetooth and Zigbee communication protocols in particular operate mainly in a frequency range between 2400 MHz and 2483.5 MHz, - the DECT communication protocol intended for digital cordless telephones and mainly used for Voice communications operates in the frequency range 1880 to 1920 MHz.

100871 Thus, for example in the case of an installation comprising transmitters and receivers of radio waves according to the Wi-Fi protocol and according to the DECT protocol, the radio wave receivers are respectively configured to receive only the waves in the frequency range 1880 to 1920 M Hz and in the frequency range 2400 to 2483.5 MHz.

100881 In addition, even in the case of two standards operating in the same frequency range, for example in the case of two simultaneous Wi-Fi communications, or simultaneous Bluetooth communication and Wi-Fi communication, the different radio waves received are discriminated.

Indeed each standard uses in the specified frequency range several channels (also called carriers) distributed in the specified frequency range.

For example, the Bluetooth communication protocol 1-> uses 79 radio frequency channels separated by 1 MHz.

The transfer of data between a radio wave transmitter and a radio wave receiver is effected by frequency modulation of said channels alternately according to a known pseudo-random sequence of the radio wave transmitter and the radio receiver. radio wave.

This frequency hopping spread spectrum technique prevents interference between two communication protocols operating in the same frequency range.

Thus, in the case of an installation comprising radio wave transmitters and receivers according to a plurality of different communication protocols, the radio wave receivers are each configured to process only the radio waves corresponding to a frequency band. predetermined (for example 2418 to 2419 MHz for a Bluetooth receiver at a current time).

The equipment can be, in the example shown: a laptop LT 10 (or "laptop") comprising in particular a processing circuit and integrated baffles 11, 12; a wireless home cincma HC system 20, comprising in particular two speakers 21, 22 and a sound bar 23; in one embodiment, the home cinema system 20 does not include a processor or memory but receives and restores sound content and receives and applies an adjustment instruction relating to the restitution of the sound content; a wireless telephone SM 30, of the smartphone type, comprising an architecture of the SoC (system on a chip) type comprising in particular a processor and a memory, and also comprising an integrated mini loudspeaker 31; a connected speaker EC 40, which may include a personal assistant, and comprising a plurality of loudspeakers 41, 42; an HF 50 hi-fi system comprising two stereo speakers Si, 52, in one embodiment, the hi-fi system does not include a processor or memory but receives and reproduces sound content and receives and applies an adjustment instruction relating to the restitution of sound content; a GW gateway 60 between the local network 70 and a wide area network 80, for example the Internet, the gateway comprising a processing circuit; in one embodiment, the gateway 60 does not include sound reproduction means but determines an adjustment setpoint and transmits it to one of the devices 10, 20, 30, 40 or 50.

The local network can of course include a plurality of each aforementioned item of equipment, as well as include other types of equipment than those mentioned above.

Each aforementioned item of equipment capable of transmitting an adjustment instruction to a loudspeaker integrated or connected to said item of equipment can be considered as a sound reproduction device DR within the meaning of the invention.

Each aforementioned item of equipment comprising a processor, a memory, a transmitter and a receiver thus has a processing circuit CT, as shown in FIG. 3, and can be configured to implement all or part of the method according to one embodiment of the invention.

Thus the system illustrated in FIG. 1 is an exemplary embodiment of an installation comprising a plurality of reproduction devices and a processing circuit.

In this exemplary embodiment, a master device, as a radio wave receiver, measures, at any time and continuously, current channel state information (CS ]) by type of radio wave.

In this example, the master equipment designates the gateway GW 60, by nature master of the other equipment connected to the local network.

As specified previously, the channel state information is indicative of a combined effect, depending in particular on the environment, including obstacles to the propagation of waves, for example a user depending on his current position, the walls , doors, furniture or others.

Indeed, each radio wave transmitter emits a radio wave in all directions.

Each radio wave thus transmitted propagates by different paths to a given radio wave receiver.

Different disturbances can affect the propagation of radio waves in the environment.

Mention may be made of diffraction, refraction, reflection or absorption of all or part of the radio waves by the aforementioned obstacles.

[0100] The channel state information is representative of these disturbances which affect in particular the amplitude and the phase of the radio waves received.

For purposes of simplification, in this example, the single variable considered in the environment is the current position of a single user UT.

Of course, other variables can be considered in combination with a variation in the user's position.

A variant described below illustrates the movement of a user in a housing considered in combination with another modification of the housing, in this case the introduction of a new piece of furniture.

[0103] According to one embodiment, a computer program is proposed comprising instructions for the implementation of a above method, when said instructions are executed by a processor of a processing circuit.

A flowchart of a general algorithm of such a computer program is illustrated in FIG. 2.

The data of the computer program can for example be stored on a non-transient data storage medium, readable by computer, comprising at least one sequence of instructions causing a computer to execute a program executing all or part of the steps. of said method, such as a memory MEM of the processing circuit CT described above with reference to FIG. 3.

The method described above can be implemented by the execution of said instructions by the processor PROC of the processing circuit CT above.

Said adjustment method is initiated at a current instant, a user UT 90 being positioned, in a current position, within the range of action of the aforementioned equipment, that is to say in the radioelectric field created by the continuous emission of radio waves by the transmitters of the aforementioned equipment to maintain the wireless local area network connecting the aforementioned equipment.

At the current instant, the master equipment item, as a radio wave receiver, receives the current channel status information.

Inherently, this reception involves the prior succession: - of a transmission Em (Si) of a current signal by at least one radio wave transmitter of at least a first device, - and of a reception REC (Em) (82) of the current signal, transmitted during transmission, by at least one radio wave receiver of at least one second device.

[0110] The current signal can be transmitted by several radioelectric wave transmitters and can be received by several radioelectric wave receivers.

[0111] For example, the current signal can designate a radio wave: - emitted by a Wi-Fi transmitter of the GW 60 gateway and / or by a Wi-Fi transmitter of the wireless telephone SM 20, - and received by a Wi-Fi receiver of the LT 10 laptop and / or by a Wi-Fi receiver of the EC 40 smart speaker.

The propagation of radio waves is disturbed by the body of the user UT 90 and can be considered as a radio fingerprint, depending on the current position of the user.

[0113] In fact, it is possible, from the current signal received by a radioelectric wave receiver, to represent a current radioelectric scene.

This current radioelectric scene is affected in particular by the obstacles to the propagation of radioelectric waves between the radio uncle's transmitter (s) and the radio wave receiver (s) and by the current position of these obstacles.

The user's body is such an obstacle, capable of causing diffraction, refraction, reflection or absorption of all or part of the radio waves.

When the current signal is emitted by several radioelectric wave transmitters, the radioelectric scene is two-dimensional or three-dimensional. It is thus possible to characterize the position of the user according to two or three coordinates of a reference mark, respectively.

When the current signal is received by several radio wave receivers, each signal thus received corresponds to a different perception of the same transmitted signal.

Depending on the current position of the user, the signal received by one of the radioelectric wave receivers can thus be disturbed more strongly than the signal received by the other radioelectric wave receivers.

The cross-checking and the discrimination of the signals respectively received by each receiver make it possible to establish with exactitude the current position of the user.

The channel state information received is stored in the memory MEM as a “current data set”, representative of the current disturbance.

When only one type of radio wave is received, this data set includes only one data.

When more than one radio wave type is received, the current data set includes one data item per type.

[0118] A plurality of frequencies and communication protocols offer a fine discrimination of the environment.

Indeed, the radio waves emitted according to different protocols have different penetrating properties in different materials.

Thus, obtaining channel state information for each respective type of radio wave offers a fine quantification of the current disturbance induced by the user as a function of his current position on the propagation of the radio waves.

In addition, different protocols are associated with different transmission powers.

Thus the DECT protocol makes it possible, for example, to cover a larger area than the Bluetooth protocol alone for the detection and location of the user.

The processor PROC then characterizes DET i (S3) the current disturbance, by comparing the set of data obtained with sets of reference data stored in a database DB.

[0120] Such a database can be constituted by various means.

In general, a calibration is performed, during which, for a position of a user in the space covered by the range of said at least one radio wave transmitter: - said reference signal is received in the presence of said user in said position, - a reference data set comprising at least one reference datum is obtained on the basis of said received reference signal, - and said obtained reference data set is associated with said position.

[0121] The association between each set of reference data and a respective reference position can be pre-established by sampling.

In the case where the user is motionless in the environment, for example seated in an armchair, the current disturbance of the propagation of the radioelech wave 16 induced by the user's body is constant over time.

Thus, the or each current channel state information item acquired continuously is constant over time.

When such an absence of variation is observed during a predefined period of time, it is possible for example to submit a request to the user so that the latter provides an indication of his current position.

Thus, the current channel state information (s) can be recorded as a "reference data set" and associated with the current position indication provided by the user.

[0124] Different sets of reference data can thus be obtained and associated with a respective position indication supplied by the user in response to a request.

[0125] The database can moreover evolve by learning from the sets of reference data already recorded.

[0126] For example, in the case where the user moves around the environment, for example by walking from an armchair in the living room to the front door, it is impractical to repeatedly submit requests to the patient. user so that it can inform its current position as it moves.

[0127] However, the indication of the current position corresponding to the chair in the living room can already be associated in the database with a set of reference data.

Likewise, the current position indication corresponding to the entry gate can also be associated in the database with another set of reference data.

[0128] It is possible to record each current channel state information as a set of reference data "continuously during the movement of the user, and to associate each of the channel state information currents thus recorded respectively to a probable position indication, the probable position indications forming a line connecting the lounge chair to the front door.

In general, the sets of reference data thus acquired represent reference disturbances providing reliable points of comparison with a current disturbance with the aim of determining the current position of the user.

A digital simulation of the propagation of the radio wave can be used, alone or in addition to the sampling, in a virtual environment, representative of the real environment in which the various aforementioned items of equipment are placed.

The database is stored in the memory MEM, for example prior to the execution of the instructions for implementing the adjustment method.

[0132] Of course, alternatively the database can be stored in a wide area network and accessible on request from the master equipment.

In an exemplary embodiment, the comparison is repeated for different reference disturbances until the difference IIREC (Em) - RECi (Em) II between the current disturbance and a reference disturbance is less than a predefined threshold THR.

Such a disturbance is identified as being the reference disturbance closest to the current disturbance.

A variant is presented below in which the comparison is carried out by statistical analysis.

The processor PROC of the master equipment then determines LOC i (54) an indication of the user's current position on the basis of the result of the comparison, by assimilating it to the closest reference disturbance. , supra.

In this exemplary embodiment, the processor PROC of the master device then determines CONS i (S5) one or more adjustment instructions, respectively associated with one or more devices 10, 20, 30.40, 50 on the basis of the indication of the user's current position to restore the sound content to the user.

Of course, the adjustment of sound reproduction devices is only one example of an embodiment.

On the basis of said comparison, it is in fact possible to determine an adjustment setpoint for any type of device for rendering content intended for a user, for example a device for rendering video or audiovisual content.

Indeed, the different equipment of the installation can include display systems.

[0138] For example, the user can control a video projector through the LT 10 laptop computer to project audiovisual content such as a movie on a room wall.

At the current moment, the projection of the film being in progress, the user chooses to leave the room.

[0139] 11 can be provided that as soon as the user's current position indication corresponds to a position outside said room, the "adjustment instruction" intended for the LT 10 laptop computer includes a pause. of the film, for example until a next indication of the user's current position corresponds to a position inside said part.

[0140] A variant is presented below in which the determination of adjustment instructions is not carried out by the master equipment item.

Each adjustment setpoint intended to be applied by the sound reproduction device DR to a loudspeaker can more precisely be determined on the basis of a distance between the position of said loudspeaker and the currently determined position of the speaker. user.

In order to determine such a distance, the respective positions of the loudspeakers 11, 12, 21, 22, 31, 41, 42, 51, 52 in the environment, which may include the respective orientations of the loudspeakers, can be previously stored in the memory MEM. 18

[0143] The positions of the loudspeakers can for example be supplied by the user during an initialization of the system or be predetermined by the equipment itself.

[0144] For example, the equipment can successively control each loudspeaker to emit a predetermined audio signal, the sound intensity of the audio signal emitted being picked up by microphones present on other equipment in order to determine by triangulation a relative position of each. loud speaker.

[0145] The adjustment instructions having been determined, the communication interface INT of the master device transmits SEND (CONS i) (56), if necessary, the adjustment instructions to the devices concerned, for example by using the local network 70.

[0146] Thus, the HF hi-fi system 50, as a “sound reproduction device DR”, comprising two stereo speakers 51, 52, can receive an adjustment instruction for each of the two stereo speakers 51, 52.

The HF hi-fi system 50 controls each stereo speaker 51, 52 according to their respective adjustment setpoint to restore the audio stream to the user in a manner suited to the user's current position.

Of course, the adjustment of one or more sound reproduction devices as described above can be repeated when the user is moving around in the environment.

[0148] In fact, as specified above, the master equipment item continuously and continuously receives channel status information; thus the adjustment setpoint can be continuously determined on the basis of the current channel status information.

[0149] In one embodiment, the adjustment method can be continuously adapted on the basis of a previous position indication from the user.

For example, a previous iteration of the method can characterize a previous position of the user in a room.

[0150] On the basis of the previous iteration, in a subsequent iteration of the method, only the equipment items of this room and of the neighboring rooms are commanded to transmit and receive a radio wave.

[0151] Thus, the equipment that is too far from the user is not controlled and remains inactive.

In addition, provision can be made for only the reference data associated with positions close to the previous position of the user to be compared with the current data, with a view to implementing the adjustment method. which is both fast and requiring minimal computing power.

The present disclosure is not limited to the embodiments described above, only by way of example, but it encompasses all the variants that a person skilled in the art may envisage in the context of the protection sought.

In a variant mentioned above, the comparison between the current data set 19 and the reference data sets is implemented by a statistical analysis.

The two main types of statistical analysis are the analysis of descriptive statistics and the predictive analysis.

[0156] The analysis of descriptive statistics includes methods for organizing and summarizing the collected data.

[0157] Predictive analysis is based on methods allowing conclusions to be drawn on the data collected on the basis of the evaluation of a sample of the data.

For example, predictions can be made for all of the data.

An example of a prediction may relate to the probability that a user is located near a given position based on the collected data.

Data mining for simple or deep machine learning methods such as convolutional networks can be used in predictive analytics.

According to one embodiment, the set of data obtained can be integrated into the sets of reference data, with the aim of supplying a machine learning method making it possible to continuously improve the determination of the user's current position.

[0158] Statistical methods such as a regression analysis, an interpolation method or an extrapolation method can be used to analyze and compare with each other the current disturbance of the radio wave linked to the presence of the user. in the current position and the different disturbances that can generally be induced by the presence of the user in respective positions of a given space.

[0159] The different types of statistical analyzes can be compared with each other.

For example, adjustment instructions can be determined based on the result of comparisons made according to each type of statistical analysis and the user can for example select one or more instructions corresponding subjectively to the most satisfactory sound reproduction.

In a variant mentioned above, the adjustment setpoint is not determined by a master device but in a manner distributed by each device comprising a sound reproduction device.

[0161] Thus, the adjustment setpoint can be more easily adapted to the specificities and to the material possibilities offered by each sound reproduction device.

[0162] For example, taking the aforementioned example illustrated by FIG. 1, the master equipment can only determine the indication of the user's current position, and communicate this indication to the various sound reproduction devices DR comprising them. - even an integrated CT processing circuit.

[0163] Said sound reproduction devices are connected to respective loudspeakers and have a memory MEM storing data relating to the position of said loudspeakers.

[0164] Said sound reproduction devices DR can then independently determine a relative distance of each loudspeaker with respect to the user, on the basis of the current position of the user and of the position of the loudspeakers. speakers.

[0165] Said sound reproduction devices can thus independently determine, on the basis of the relative distances, a respective adjustment setpoint intended for each loudspeaker.

[0166] In a variant mentioned above, the plurality of sets of reference data comprises at least a first set obtained in the presence of at least one obstacle other than the user to the propagation of the transmitted radio wave. by said at least one radio wave transmitter and associated with an indication of the presence of said at least one obstacle, and a second set of reference data obtained in the absence of said at least one obstacle and associated, in the correspondence table, to an indication of the absence of said at least one obstacle, - the method further comprises a determination of an indication of the presence or absence of the obstacle as a function of said comparison, - and said adjustment setpoint is determined on the basis of said indication of presence or absence of the obstacle.

[0167] For example, the movement of a user in a housing can be considered in combination with another modification of the housing, in this case the introduction of a new piece of furniture.

[0168] In this example, a database of reference disturbances is pre-existing.

This database is representative of predefined positions of the user in the environment before introduction of the cabinet.

[0169] However, the database is not necessarily representative of the current position of the user in the environment after introduction of the piece of furniture.

[0170] In addition, the current disturbance of the user in a current position can be different before and after the introduction of the piece of furniture.

To overcome this difficulty without it being necessary to carry out a new complete calibration, it is possible to modify the pre-existing database by learning.

For this, each current disturbance can be recorded and the recorded disturbances compared with one another.

In the case where several recorded disturbances correspond to the same position of the user after introduction of the piece of furniture, then these recorded disturbances are substantially identical to each other. 21

[0194] These recorded disturbances which are substantially identical to each other and which have no correspondence in the reference database can however be identified by training with a reference disturbance stored in the reference database.

The identification can be based for example on the determination of similarities between the disturbances recorded and said reference disturbance, and / or on the fact that said reference disturbance not having been detected for a long period of time n 'is no longer considered representative of the configuration of the environment after introduction of the piece of furniture and needs to be updated.

On this basis, it is possible to update said reference disturbance in the database by replacing it with the recorded disturbance corresponding to an identical position of the user and to the modified configuration of the environment.

[Claim 1]

Claims (1)

CLAIMS [Claim 2] A method of adjusting at least one rendering device as a function of an adjustment setpoint for rendering a content, the method comprising: [Claim 3] - obtaining a current set of data comprising one or more current data items, at least one current data item being representative of a current signal received by a radio wave receiver from at least one first device and transmitted by a radio wave transmitter from at least one second device , [Claim 4] - a comparison of the current data set obtained with a plurality of reference data sets, each reference data set comprising one or more reference data, at least one reference data being representative of 'a reference signal received by said radio wave receiver of said first equipment and transmitted by said radio wave transmitter of said second equipment in the presence of a u user positioned in a space covered by a range of said radio wave transmitter, an indication of position of said user at the time of reception of said reference signal being associated with each of the reference data, and [Claim 5] - a determination of said adjustment setpoint as a function of said comparison. Adjustment method according to the preceding claim, comprising: - determining an indication of the user's current position in said space as a function of said comparison, - and in which said adjustment instruction is determined on the basis of said indication of current position. Method according to Claim 2, in which the adjustment setpoint is further determined on the basis of a position of said at least one reproduction device. Adjustment method according to one of the preceding claims, in which the reproduction is sound and said adjustment instruction comprises an instruction relating to at least one element. a list comprising an amplification, an equalization of frequencies, a temporal phase shift of the sound content, a type of sound content to be restored. Adjustment method according to one of the preceding claims, wherein said current signal and said reference signals received by said 23 [Claim 6] [Claim 7] [Claim 8] [Claim 9] [Claim 10] radio wave receiver of said first equipment are also emitted by a radio wave transmitter of a third equipment. Adjustment method according to one of the preceding claims, wherein said current signal and said reference signals received by said radio wave receiver of said first equipment item are also received by a radio wave receiver of third equipment item. Adjustment method according to one of the preceding claims, in which: - the current data set comprises a plurality of current data items, each current data item being representative of a current signal transmitted in a respective frequency band, - and the comparison includes a comparison of each current data with the plurality of reference data sets. Adjustment method according to one of the preceding claims, in which: - the or each current datum comprises a current channel state information item representative of a propagation of said current signal, - each reference datum comprises a status information item of reference channel representative of a propagation of said reference signal, - and said comparison of said at least one current datum with the plurality of reference data comprises a comparison of the or each current channel state information item with the plurality of said information reference channel status. Adjustment method according to one of the preceding claims, comprising beforehand a calibration during which, for a position of a user in the space covered by the range of said at least one radioelectric wave transmitter: - said reference signal is received in the presence of said user in said position, - a reference data set comprising at least one reference datum is obtained on the basis of said received reference signal, - and said obtained reference data set is associated with said position. Processing circuit comprising a processor connected to a memory and to at least one communication interface with at least one 24 [Claim 11] [Claim 12] [Claim 13] [Claim 14] [Claim 15] rendering device, the rendering circuit processing being configured to carry out the steps of an adjustment method according to one of claims 1 to 9. Processing circuit according to claim 10, wherein, the or each rendering device being equipped with a radio communication module comprising a radio wave transmitter and a radio wave receiver, the communication interface of the processing circuit is arranged to communicate by radio link with the or each communication module. Gateway of a local radiofrequency network, comprising a processing circuit according to one of Claims 10 and 11. Installation comprising a plurality of reproduction devices and a processing circuit according to one of Claims 10 and 11. Computer program comprising instructions for implementing the adjustment method according to one of claims 1 to 9, when said instructions are executed by a processor of a processing circuit. Computer-readable non-transient data storage medium comprising at least one sequence of instructions causing a computer to execute a program executing the steps of an adjustment method according to one of claims 1 to 9.