WO2013034866A1

WO2013034866A1 - Method and device for synchronising sound sources

Info

Publication number: WO2013034866A1
Application number: PCT/FR2012/052010
Authority: WO
Inventors: Alain Molinie; Eric Lavigne; Vincent Leclaire
Original assignee: Awox
Priority date: 2011-09-07
Filing date: 2012-09-07
Publication date: 2013-03-14
Also published as: EP2754270A1

Abstract

The device (205) for broadcasting sound for the broadcast of audio content coming from at least one audio content server, comprises: a base (220) for supplying power to the device via a bulb socket, an electro-acoustic transducer (235), a means (230) for discovering a network comprising at least said server and at least one other device for broadcasting sound, and a means (230) for synchronising the broadcasting of sounds by said electro-acoustic transducer and the broadcasting of sounds by said other device. In certain embodiments, the device comprises: a means of exchanging messages with at least one other device for broadcasting sound and a means of selecting sound and/or light signals broadcast by said electro-acoustic transducer, according to the data received from at least one other device for broadcasting sound. In certain embodiments, the selection means is capable of selecting an audio track according to at least one audio track selected by another device for broadcasting sound.

Description

METHOD AND DEVICE FOR SYNCHRONIZING SOUND SOURCES

Technical area

The present invention relates to a method and a device for synchronizing sound sources. It applies, in particular, to the synchronization of remote sound diffusers.

State of the art

Every person has more and more digital audio media. It is now common to share this content on a home network implementing the DLNA standard (acronym for "Digital Living Network Alliance" for "alliance for a living digital network").

Now, in a home environment, more and more sound sources can be used to broadcast digital audio media residing on a storage device. For example, one may wish, from a mobile phone, trigger the playback of a shared media by a computer on several speakers distributed in different rooms of a housing.

However, because a device triggers the playback of the same media on two sound sources, they emit the same sound or different channels representative of the same media, with a time shift, the quality perceived by the users is reduced .

There are products that synchronize multiple sound sources, but these products require either the use of proprietary (non-DLNA) network protocols or full DLNA system renewal, such as the purchase of new DLNA software. specialized for sharing content on his computer, or the purchase of a specialized sharing device.

Finally, the coordination of media broadcasters requires user intervention, which takes time and requires technical skills rarely mastered.

Presentation of the invention

The present invention aims to remedy all or part of these disadvantages and, in particular, to provide the coordination of several sound sources emitting from a device sharing its content between several rendering devices, including sound diffusers and / or luminous.

For this purpose, according to a first aspect, the present invention relates to a sound broadcasting device for broadcasting audio content from at least one audio content server, the device comprising:

a base for the power supply of the device by a bulb socket, an electro-acoustic transducer,

means for discovering a network comprising at least said server and at least one other device for broadcasting sounds and

a means for synchronizing the sound diffusion by said electro-acoustic transducer and the sound diffusion by said other device.

Thanks to these provisions, the different sound sources are automatically synchronized, without the user having to intervene outside the connection of the device on a power supply socket of a light bulb.

According to a second aspect, the present invention relates to a device for sound and / or light diffusion, the device comprising:

a base for the power supply of the device by a bulb socket,

an electro-acoustic transducer,

a means for exchanging messages with at least one other device for broadcasting sounds and

means for selecting sound and / or light signals diffused by said electro-acoustic transducer, as a function of data received from at least one other sound diffusion device.

Thanks to these arrangements, the different sound sources are automatically coordinated, that is to say select a channel (right or left) of the audio content according to the channel broadcast elsewhere or selects a light intensity or a light color broadcast , depending on other light diffusions, without the user having to intervene outside the connection of the device on a supply socket of a light bulb.

According to a third aspect, the present invention is directed to a sound broadcasting device for broadcasting audio content from at least one audio content server, the device comprising:

a base for the power supply of the device by a bulb socket,

an electro-acoustic transducer,

means for declaring said device in wireless access point mode.

It is recalled here that a wireless access point (in English "wireless access point" or

WAP) is a device that allows other devices to connect to a network, usually wired, using Wi-Fi, Bluetooth or a similar standard.

Thanks to these arrangements, the device that is the subject of the invention allows the constitution of a device network.

According to a fourth aspect, the present invention is directed to a device for synchronizing sound sources, for broadcasting audio content originating from at least one server audio content implementing the DLNA standard to form a DLNA server, the device comprising:

a system for broadcasting master sounds implementing the DLNA standard to constitute a DLNA audio setter,

at least one slave sound broadcasting system implementing the standard

DLNA to build a DLNA audio setter,

a control system implementing the DLNA standard to constitute a DLNA controller, adapted to perform:

- discovering the audio content available on at least one DLNA server,

- the configuration of at least one DLNA audio setter and

- the command to send content from a DLNA server to at least one DLNA audio restituant, according to a data transfer protocol and a compressed data format.

In this device:

the master system comprises:

a decoder of the data transfer protocol,

an audio encoder that encodes the decoded content in a compressed audio format to an audio format without any compression or header information,

a module for transmitting the encoded content according to a protocol allowing the temporal control of the slave systems and

the slave systems are adapted to decode and broadcast the audio contents received from the master system.

Thanks to these arrangements, the time offsets between the signals broadcast by the DLNA restitters are synchronized below the threshold of human perception. In particular, by using a RAW format for streaming audio data and the RTP time control protocol, no variable delay can occur in the signal decompression, or in the transmission over the network by the master system. or by slave systems. In addition, the device object of the present invention is an open system.

In embodiments, the device that is the subject of the present invention, according to one or the other of its aspects, comprises means for communicating at least one IP internet protocol address.

In embodiments, the device that is the subject of the present invention, according to one or the other of its aspects, comprises means for receiving signals coming from a checkpoint, within the meaning of the UPnP standard and constitutes a restorer within the meaning of this standard.

Note that a control point and a restituteur are more known to the skilled person in their English translation "control point" and "renderer".

According to particular characteristics, the data transfer protocol is the HTTP protocol.

According to particular characteristics, the audio format without any compression or any header information is the RAW, or PCM format.

According to particular characteristics, the master system constitutes a gateway that acts as a server for the different restituteurs.

According to particular features, the transmission module is adapted to perform an encoding according to the RTP real-time protocol.

According to particular characteristics, the transmission module is adapted to perform an encoding according to the TCP transmission control protocol.

According to particular characteristics, the master system is adapted to broadcast the audio content simultaneously the slave systems.

According to particular features, the device which is the subject of the invention comprises:

a light source cap, referred to as "upstream",

a source of light fed by said base,

an electro-acoustic transducer,

means for receiving signals representative of a sound signal to be broadcast by the loudspeaker, powered by said base and

an amplifier powered by said base and adapted to amplify the electrical signal supplied by the reception means for transmitting an amplified signal to the electro-acoustic transducer.

Thanks to these arrangements, it implements a discrete audio terminal coupled to a lighting point. One of its advantages is that the lighting points are numerous, accessible, and powered. In addition, existing sockets from a home network can be used to create a distributed and powered loudspeaker network without additional wiring. It is thus possible from a computer or a mobile phone connected to the network and equipped with a controller implementing the DLNA standard and the UPnP protocol to discover, within the meaning of the DLNA standard, each of the devices object of the The present invention accessible and control individually or even using a grouping system, control area by ensuring audio synchronization on each zone.

According to particular features, the device which is the subject of the invention comprises

a light source cap, referred to as "upstream", a source of light fed by said base,

a means for receiving radio signals fed by said base adapted to receive radio signals emitted by at least a first computer system and

- A radio signal transmission means fed by said base and adapted to retransmit radio signals received by the receiving means to a second computer system for extending the range of wireless communication between the first computer system and the second computer system.

Thanks to these provisions, it implements a repeater (or extension "range extender") discrete coupled to a lighting point. One of its advantages is that the lighting points are numerous, accessible, and powered. With the implementation of the present invention, existing sockets of the light array of a housing or workplace can be used to create an extended network with multiple distributed and powered repeaters without additional cabling to the network. lighting. It will be noted that here, the term "computer system" refers to any system provided with a memory retaining at least one program and a central unit capable of executing at least one said program, for example a computer server, a computer terminal or a device.

According to a second aspect, the present invention aims at a method of synchronization of sound sources, which comprises:

a control step implementing the DLNA standard to perform:

- the discovery of the audio contents available on at least one server

DLNA,

- the configuration of DLNA audio restitters, one of which acts as master and each other acts as a slave and

- the command to send content from a DLNA server to the DLNA audio restitters, according to a data transfer protocol and a compressed data format,

a step of decoding the data transfer protocol, by the master audio restorer,

an audio encoding step for encoding the decoded content in a compressed audio format into an audio format without any compression or header information, by the master audio composer,

a step of transmitting the encoded content according to a protocol allowing the time control of the slave systems, by the master audio restorer, and

a step of decoding and broadcasting the audio contents received from the master system.

The advantages, aims and special features of this process being similar to those of the device object of the invention, they are not recalled here. Brief presentation of the figures

Other advantages, aims and particular features of the present invention will emerge from the description which follows, for an explanatory and non-limiting purpose, with reference to the appended drawing, in which FIG. 1 represents, schematically, a particular embodiment of the device object of the invention.

Presentation of at least one embodiment of the invention

FIG. 2 shows a particular embodiment of the device 205 which is the subject of the present invention. This device 205 is mounted on an electric bulb socket, of known type, screw or bayonet, 215, with a corresponding base 220, which allows its power supply. In a housing 225, an electronic circuit 230 comprises means (not shown) for wireless communication with:

at least one content server 210,

at least one ignition control means 245 and

another device 250 identical to the device 205 but capable of implementing a different operation (for example of the master or slave type).

The ignition control means 245 is, for example, constituted by a switch, a remote control, a mobile telephone or a home automation system or a control point. of one of the UPnP or DLNA standards, and transmitting radio signals. The control means 245 is, in some embodiments, confused with the server 210.

The housing 225 further comprises at least one electro-acoustic transducer 235, for example a loudspeaker, controlled by the circuit 230. The housing 225 also comprises at least one electro-light transducer 240, for example of the electroluminescent diode type or incandescent bulb.

The electronic circuit 230 controls each electro-light transducer 240 as a function of the ignition or extinction signals coming from the control means 245 and as a function of the signals exchanged with the server 210 and / or the other device 250. For example, the control means 245 commands, at the user's choice:

the permanent ignition of the transducers 240,

permanent extinction of the transducers 240,

the selection of a luminous intensity and / or a color of light,

the variation of the light emitted as a function of the sound signal to be broadcast by the device,

the variation of the light emitted in coordination with the other devices and / or the variation of the light emitted as a function of the sound signal to be diffused and in coordination with the other devices. The operation of the device 205 and the content server 210 is exposed with respect to the other figures. In general, the device 205 is inserted in the network consisting of similar devices and the server 210 and synchronizes (coordinated sound and / or light scattering) with the other similar devices.

As illustrated in FIG. 3, in embodiments, the operation of a device that is the subject of the present invention comprises, first of all, an installation step 305. The installation essentially consists in electrically connecting the base 220 and the socket 215.

During a step 310, the device performs a discovery of the network, that is to say a recognition of the components of this network. An IP address, according to the Internet Protocol, is assigned to the device.

During a step 315, the device is in access point mode, for example if there is no other access point already declared in the network. This mode can also be automatically declared, regardless of the presence and number of other devices using this mode, in the network.

During a step 320, the device makes a selection of the audio channel that it will broadcast. This selection is made according to the audio channels already selected by the other devices and is communicated to the other devices. Preferably, the audio channel is selected according to the audio channel selected by a nearby device (for example detected because its radio signal is received with greater intensity). Optionally, if no device has selected a channel or if two devices having selected two different voices are close, a draw is performed by the device. The result of this draw is communicated to the other devices so that one of them can adapt to the new configuration of the network and select another channel than the one he had previously selected.

Thus, the reconfiguration of the network is dynamic and intelligent.

During a step 325, the device performs, for broadcasting audio content, a synchronization with at least one other device, as explained below.

During a step 330, the device receives a light-on command, control means 245 or server 210.

During a step 335, if the command received in step 330 permits, the device selects a light synchronization mode. For example, the devices can select a light scatter mode variable in intensity or color, in phase, in phase shift or in phase opposition with other nearby devices. The amplitude and the frequency or the sequence of light states of the transducers 240 of the device may be provided by the server 210 or programmed in at least one of the devices 205. The result of the selection is communicated to the other devices. During a step 340, the selected light synchronization is implemented. Thus psychedelic effects, wave, synchronized variation of all light sources or, on the contrary disordered, can be obtained, in rhythm with the sound signal to broadcast or not.

Then we return to step 320, the self-configuration of each device 205 of the network being dynamic and adapting, in particular, to the controls of the user through the control means 245.

Thanks to the implementation of the invention, it automatically performs a synchronization, for example Wifi, and a definition of an access point ("access point"). At least two digital sources synchronize to define areas in which the light and / or sound emissions must be coordinated, for example areas corresponding to different audio channels, including right and left in the case of stereophonic sound broadcasting.

Preferably, an IP address is managed to manage the profile, for example to manage the light broadcast.

In this embodiment, the device takes the form of a light bulb having a processor programmed to react according to the presence of other similar devices and / or exchange messages with other similar devices. This creates an intelligent network of devices.

Preferably, at least one device is capable of managing itself and managing other devices.

Examples of use of the device network are:

the first device determines that another device that communicates with it is broadcasting the right channel of a stereophonic audio signal while the first device is broadcasting the left channel. More generally, it aims to equalize the number of broadcasting devices of each channel, among the devices that communicate directly with it (all those that respond or, if there is Wifi repetition, depending on the response time).

the device lights up with a color corresponding to the audio channel that it broadcasts.

the device changes color when another device declares to change color (all identical or, on the contrary, all different), at least one of the devices regularly changing color, possibly gradually.

- smart-grid, to reduce electricity consumption intelligently or

- Psychedelic, that is to say change of light intensity and / or color according to the broadcast audio signal.

Thus, in embodiments, the sound broadcasting device for broadcasting audio content from at least one audio content server, the device comprises: a base for the power supply of the device by a bulb socket,

an electro-acoustic transducer,

a means for synchronizing the sound diffusion by said electroacoustic transducer and the sound diffusion by said other device.

In embodiments, the sound and / or light diffusion device, the device comprises:

a base for the power supply of the device by a bulb socket,

an electro-acoustic transducer,

In embodiments, the sound broadcasting device for broadcasting audio content from at least one audio content server, the device includes:

a base for the power supply of the device by a bulb socket,

an electro-acoustic transducer,

means for declaring said device in wireless access point mode.

Other embodiments, intended to be combined with the embodiments described above are detailed in the description which follows.

FIG. 1 shows a master system 105 and slave systems 135 and 165, audio content servers 195 and 196 and a controller 190. The servers 195 and 196 are to be understood in the sense of the DLNA standard (acronym for Digital Living Network Alliance for Alliance for a Living Digital Network). The DLNA alliance brings together manufacturers of electronic devices, computer peripherals, personal computers, mobile phones, and service and content operators. DLNA defines an interoperability standard for reading, sharing and controlling multimedia devices regardless of their brand or nature. The standard identifies "actors", some of whom may be on the same network equipment:

- the "server" that stores and supplies, on demand, digital content,

- the "renderer", which decodes the digital contents to be able to play them,

- the "player" (or broadcaster), who plays the decoded contents and

- the "controller", which allows you to browse the content offered by the servers and make them play by the renderers and players.

We note that the player, renderer and controller can be on a single device that can be compared to the client of the client / server model: any compatible client (TV, stereo, photo frame, mobile phone, set-top box, etc.). can retrieve items (video, music, photos) on a DLNA server. This server can be installed on a computer, or on a mobile phone, or be a standalone hard drive enclosure. Network links can be Ethernet or Wi-Fi.

DLNA relies on several standards including WiFi, Ethernet and MoCA, for the physical layer, UPnP Device Architecture for discovery and control, UPnP AV for media management, HTTP for the transport layer, a wide range of standard on audio, video and image formats and finally DTCP-IP for media protection during transport.

The controller 190 thus performs:

- discovery of contents,

- under the control of the user, the configuration of the broadcast and the number of audio renderers, here the systems 105, 135 and 165 and

the command to send contents from the servers 195 and 196 to the audio renderers 105, 135 and 165.

Audio renderers transmit, for example, audio contents according to the protocol

HTTP (HyperText Transfer Protocol for Hypertext Transfer Protocol).

The master system 105 includes an HTTP decoder 106 and an audio encoder 107, which encodes the content into a compressed audio format, for example MP3 or WMA, in a RAW format (Real Audio Format), also called PCM. We recall here that the RAW format is a raw audio format, without any compression. Comparable to WAV or AIFF files in size, the RAW file contains no header information (Metadata). The RAW file can be PCM, IEEE 754 or ASCII. The most common extension is ".raw" or ".Pcm". The RAW file may not have an extension.

The sound encoded by the encoder 107 is transported according to the Real Time Protocol (RTP) / TCP (Transmission Control Protocol) protocol via a transmission module 108. This RTP / TCP protocol allows the time control of slave systems 135 and 165.

The slave systems 135 and 165 decode, with decoding modules 136 and 166, respectively, and broadcast the audio contents they receive.

Thanks to these arrangements, the time offsets between the signals broadcast by the renderers are synchronized to within 10 ms. In particular, thanks to the use of a RAW format for audio data to be broadcast and the RTP time control protocol, no variable delay can appear in the sound diffusion by the master system 105 or by the slave systems 135 and 165.

Note that, moreover, the device object of the present invention is an open system.

It is also noted that the master system 105 constitutes a gateway that acts as a server for the different renderers.

As understood, a method which is the subject of the invention is a method of synchronization of sound sources, which comprises:

a control step implementing the DLNA standard to perform:

- the discovery of the audio contents available on at least one server

DLNA,

- the configuration of DLNA audio restituteurs as "access points", one of which acts as master and each other acts as a slave and

a step of decoding the data transfer protocol, by the master audio restorer,

a step of transmitting the encoded content according to a real-time protocol and a transmission control protocol allowing the time control of the slave systems, by the master audio restorer, and

a step of decoding and broadcasting the audio contents received from the master system, simultaneously by the master and slave audio restituteurs. In one of the particular embodiments (not shown), the device that is the subject of the invention comprises, in at least one setter:

a light source cap, referred to as "upstream",

a source of light fed by said base,

a socket and a base downstream between the upstream base and the light source,

a means for detecting movement of a user,

a means of transmitting radio signals fed by said base and adapted

- retransmitting radio signals received by the receiving means to a second computer system for extending the wireless communication range between the first computer system and the second computer system and

and transmitting, remotely, a signal representative of the motion detection. For the purposes of the present invention, the term "computer system" any system provided with a memory retaining at least one program and a central unit capable of executing at least one said program, for example a computer server, a computer terminal or a device.

The light source base, called "upstream" is of known type, for example screw or bayonet. The light source supplied by said base is of known type, for example with light-emitting diodes or filament diodes.

The device object of the invention is declared as access point, or "access point" in the network thus constituted.

According to the variants, each of the radio signal reception means and the radio signal transmission means implements the WiFi standard, the Bluetooth standard, the DLNA standard and / or the UPnP protocol for the device, which constitutes a setter ("Renderer") in the sense of the DLNA standard, is discovered, within the meaning of this standard. In the case where the UPnP protocol is implemented, the signal transmission means is adapted to provide a UPnP profile for controlling the light power emitted by the light source.

Repeaters (range extender) are well known to those skilled in the art, they are not detailed here. For the input of the operating parameters of the repeater, for example its identifier ("SSID") or a code, preferentially, it implements a mobile phone application, for example smartphone, or a browser (in English "browser ") Operating on a computer terminal.

Preferably, the radio signal reception means is adapted to receive signals representative of a sound signal to be emitted by an electroacoustic transducer and the radio signal transmission means is adapted to retransmit signals representative of said sound signal. Preferably, the signal receiving means is adapted to receive signals representative of a control of the light power emitted by the light source and / or the light source comprises a signal receiver transmitted by carrier current on the upstream base.

The device which is the subject of the invention thus constitutes both a discrete range extender and restitateurs coupled to a lighting point that is preliminarily accessible and powered. Existing busbars from a home or office lighting network can be used to create an extended network with at least one distributed and powered repeater without additional wiring to the lighting network. Many devices and devices can communicate with a large amount of data.

It is also possible, from a computer or a mobile phone connected to the network and equipped with a controller implementing the DLNA standard and the UPnP protocol to discover, within the meaning of the DLNA standard, each of the devices the present invention accessible and control individually, or even using a grouping system, control area by ensuring synchronization on each zone.

In addition, a separate remote control of lighting control is realized. This avoids having to turn on the light source to broadcast a sound signal since the two subsystems are controlled independently and continuously supplied. We can change the light source like a traditional light bulb.

Note that some signals can be received by wireless transmission and other by wire reception.

It is possible to start the repetition of radio signals and / or light depending on the presence of a user or to create an alarm system with the addition of a camera and / or a microphone. . Thus, in variants, a camera and / or microphone is added to the device. The images and / or sounds picked up from the motion detection are then stored in the device or in the home automation system or transmitted remotely. Preferentially, a DLNA server is then implemented for the streaming (transmission as capture takes place) of the sound signal picked up or the images captured.

In particular embodiments (not shown), at least one setter further comprises:

an electro-acoustic transducer,

means for receiving signals representative of a sound signal to be broadcast by the electro-acoustic transducer, powered by said pellet and an amplifier powered by said base and adapted to amplify the electrical signal supplied by the reception means for transmitting an amplified signal to the electroacoustic transducer.

The electro-acoustic transducer is of known type, for example a loudspeaker. It is also noted that several miniaturized electro-acoustic transducers can frame the axis of the upstream base to obtain a saving of space.

The means for receiving signals representative of a sound signal to be broadcast by the electro-acoustic transducer takes, according to the variants, different forms. Preferably, the signal receiving means implements the DLNA standard and the UPnP protocol so that the device, which constitutes a renderer ("renderer") in the sense of the DLNA standard, is discovered, within the meaning of this standard. The signal receiving means is adapted to receive signals representative of the sound signal to be emitted by the electro-acoustic transducer by implementing a multipoint network.

In variants, the signal receiving means is adapted to receive radio signals representative of the sound signal to be emitted by the electroacoustic transducer. For example, this reception of radio signals implements the WiFi protocol or the Bluetooth specification.

In variants, the signal receiving means is adapted to receive carrier current signals representative of the sound signal to be emitted by the electro-acoustic transducer, said carrier current supplying said light source.

The amplifier which amplifies the electrical signal supplied by the receiving means for transmitting an amplified signal to the electro-acoustic transducer is of known type.

As understood in light of the foregoing, a discrete audio terminal coupled to a lighting point is implemented. One of the benefits is that lighting points are numerous, accessible, and powered, so many sources can be located in a home, office, factory, or store without modifying the pre-existing power grid. Thus, the existing sockets of the light network of a house can be used to create a distributed and powered loudspeaker network without additional wiring. It is thus possible from a computer or a mobile phone connected to the network and equipped with a controller implementing the DLNA standard and the UPnP protocol to discover, within the meaning of the DLNA standard, each of the devices object of the The present invention accessible and control individually or even using a grouping system, control area by ensuring audio synchronization on each zone.

The Internet Protocol (IP) addresses are managed to manage the profile, the light emission and the sound emission, in the case of the device combining these functions. The device thus reacts according to signals provided by other devices so as to constitute an intelligent network. For example, for the broadcasting of sounds, according to the assignments to the different channels of the other devices, a device selects the channel (for example right or left, in stereo or zone in the case where several media are broadcast in parallel in different areas ) that it broadcasts. Each device sends messages on the network to indicate its role thus determined. The device network thus converges, by successive adaptations, to an optimal configuration. Similarly, for the management of light colors diffused by the devices, each device determines its color according to the color diffused by the other devices. We note that different modes of operation can synchronize colors, or, on the contrary, differentiate them according to the desired visual effects. Finally, colors and sounds can be made dependent, as in so-called "psychedelic" systems. The notion of message also includes, here, the notions of issuing instructions and notions of compliance with a command received from another device. In another application, to reduce the power consumption, the devices determine whether they must stop the emission of light or sound, according to the messages transmitted by the other devices and possibly by sensors, for example presence.

Note that a device object of the invention can thus play the roles of control point, of renderer or server, other identical devices.

In a third embodiment, in addition to the features of the second embodiment, the device that is the subject of the invention comprises:

a means for controlling the amplifier adapted to control the gain of the amplifier, so that the sound power emitted by each of the devices which is the subject of the invention is controlled remotely and, if necessary, enslaved to a sensor eg position of a user;

a sound channel selector suitable for selecting, from among several sound signals, the one amplified by the amplifier and broadcast by the electroacoustic transducer, for broadcasting one of the different sound channels, for example the right stereo sound and the stereo sound; left on each of a plurality of electro-acoustic transducers positioned in the same room, or two sound media diffused in two different rooms and / or

a means for controlling the light power emitted by the light source controlled by the means of signal reception means. This provides a separate remote control lighting control. This avoids having to turn on the light source to broadcast a sound signal since the two subsystems are controlled independently. Preferably, to implement the latter option, the signal receiving means is adapted to provide a UPnP profile for controlling the light power emitted by the light source. This UPnP profile represents, at one and the same time, the ability of the device to broadcast sound signals and its ability to turn on the light source.

Preferably, for each of the embodiments, the device comprises a socket and a base downstream between the upstream base and the light source. Thus, the light source can be changed as a traditional light bulb, without modifying or replacing the components performing the functions of audio diffusion and / or control of the light source, which are between the upstream base and the downstream base.

In variants, the signal receiving means is adapted to modulate the light emitted as a function of the sound signal to be broadcast, for example according to an average over the last seconds. We can thus coordinate the light and the music to give the combined effects. It is noted that it is not only the light power that can be modulated according to the sound signal but also the color, for example in the case where several light-emitting diodes emitting in different wavelength ranges are integrated into the source. from light.

The addition of a separate remote control and / or UPNP lighting control lighting profile allows the power supply to be left on all the time. Since the lighting points are usually controlled by a switch, it is otherwise necessary to switch this switch to benefit from the sound diffusion.

Note that, in itself, the creation of a hybrid profile corresponding to two profiles is an aspect of the present invention. In particular, a dual profile of sound renderer and luminous renderer is a particular feature of this aspect of the present invention.

This third embodiment makes it possible to control the lighting as a function of the music broadcast, such as a musical evening or even dancing mode of operation.

It is also noted that a particular mode of operation of this third embodiment of the present invention comprises a simulation of presence in the equipped room (in particular to reduce the risk of burglary), by randomly triggering the music broadcast and / or from light.

In a fourth embodiment, the device according to the invention comprises a user's motion detection means, the signal receiving means being adapted to control the amplifier according to the detection of a movement. It is thus possible to trigger the start of the speaker and / or light depending on the presence of a user. This fourth embodiment allows both the user to continue to listen to the media, for example the radio, which interests him, while being economical in energy and reducing noise. The implementation of a coupling with a motion detector, allows to do a "follow me" (the broadcast of sound follows the user from one place to another) automatic.

Preferably, the reception means is adapted to transmit, remotely, a signal representative of the motion detection. An alarm system is thus created by transmitting, remotely, the motion detection information or by setting off an alarm when the user has put the home automation system in the alarm operating mode.

In variants, a device and / or a microphone are added to the device of the fourth embodiment. The images and / or sounds picked up from the motion detection are then stored in the device or in the home automation system or transmitted remotely. Preferably, a DLNA server is then implemented for the streaming (transmission as capture takes place) of the sound signal or image.

Thanks to the implementation of the present invention, the creation of a multi-room audio system requires no wiring of the electro-acoustic transducers since the existing bushings of the light network of a house are used to create a network of electro-acoustic transducers. distributed loudspeaker. The use of DLNA / UPnP for the discovery of each of these electro-acoustic transducers, gives each device the role of a "renderer" (restender) in the sense of DLNA / UPnP in the home automation system. It is thus possible from a computer or a mobile phone connected to the network and equipped with a DLNA / UPnP controller to discover and control them individually, or even using a system of grouping, of control them by zone while keeping on each zone an audio synchronization.

As discussed above, advanced implementations also allow:

- to control the sound level and play the music read by each of the electro-acoustic transducers,

to distribute the different sound channels on each of the devices,

- to add a lamp to the loudspeaker and to use the UPnP profiles for the control of luminous devices, to define the luminous intensity of the lamp,

- to coordinate the light and the music to give the combined effects,

- to add a motion control system to trigger the start of the speaker and / or the light and / or

- to create an alarm system with the addition of a camera and a microphone. It should be noted that the present invention also makes it possible to create audio-lighting chandeliers, which makes it possible to improve the sound quality.

It is also noted that the particular features of the various embodiments can be combined in other embodiments to form devices having all or some of the functions described above.

Claims

1. Sound broadcasting device (205) for broadcasting audio content from at least one audio content server, characterized in that it comprises:

a base (220) for powering the device by a bulb socket,

an electro-acoustic transducer (235),

means (230) for discovering a network comprising at least said server and at least one other device for broadcasting sounds and

means (230) for synchronizing the sound diffusion by said electro-acoustic transducer and the sound diffusion by said other device.

2. Device according to claim 1, which comprises:

3. Device according to claim 2, wherein the selection means is adapted to select an audio channel according to at least one audio channel selected by another sound broadcasting device.

4. Device according to one of claims 1 to 3, which comprises means for declaring said device in wireless access point mode.

5. Device according to claim 4, which constitutes a gateway which serves as a server for other sound diffusion devices.

6. Device according to one of claims 1 to 5, which comprises

7. Device according to one of claims 1 to 6, which comprises means for communicating at least one address of the IP internet protocol.

8. Device according to one of claims 1 to 7, which comprises means for receiving signals from a control point, within the meaning of UPnP standard, and constitutes a restituteur within the meaning of this standard.

9. Device according to one of claims 1 to 8, wherein the data transfer protocol is the HTTP protocol.

The apparatus of one of claims 1 to 9, wherein the audio format without any compression or header information is RAW, or PCM.

1 1. Device according to one of claims 1 to 10, wherein the transmission module is adapted to perform an encoding according to the RTP real-time protocol.

12. Device according to one of claims 1 to 1 1, wherein the transmission module is adapted to perform an encoding according to the TCP transmission control protocol.

13. A sound source synchronization system for broadcasting audio content from at least one audio content server implementing the DLNA standard to form a DLNA server, the system comprising:

- A device according to one of claims 1 to 12, operating in "master" mode, implementing the DLNA standard to form a DLNA audio setter,

- At least one device according to one of claims 1 to 12, operating in mode

"Slave" implementing the DLNA standard to form a DLNA audio setter,

a control means implementing the DLNA standard for constituting a DLNA controller, adapted to perform:

- discovering the audio content available on at least one DLNA server,

- the configuration of at least one DLNA audio setter and

14. Device according to claim 13, wherein the master system is adapted to broadcast the audio content simultaneously to the slave systems.