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EP0909112A1 - Wireless system with digital transmission for loudspeakers - Google Patents

Wireless system with digital transmission for loudspeakers

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Publication number
EP0909112A1
EP0909112A1 EP19980402266 EP98402266A EP0909112A1 EP 0909112 A1 EP0909112 A1 EP 0909112A1 EP 19980402266 EP19980402266 EP 19980402266 EP 98402266 A EP98402266 A EP 98402266A EP 0909112 A1 EP0909112 A1 EP 0909112A1
Authority
EP
Grant status
Application
Patent type
Prior art keywords
serial
address
loudspeaker
digital
receiver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19980402266
Other languages
German (de)
French (fr)
Other versions
EP0909112B1 (en )
Inventor
Guy Nathan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TouchTunes Music Corp
Original Assignee
TouchTunes Music Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • H04R3/12Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00Stereophonic arrangements
    • H04R5/04Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07Applications of wireless loudspeakers or wireless microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00Public address systems

Abstract

A digital audio signal is compressed, converted to serial, passed to a quadrature phase modulator (101) and transmitted to a receiver (RX), attached to a loudspeaker (HP). Serial conversion adds protocol information, destination address, loudspeaker control information, and encryption key. The receiver checks the packet address and carries out decryption if it matches its own.

Description

  • [0001] [0001]
    La présente invention concerne un système sans fil à transmission numérique pour haut-parleurs. The invention relates to a wireless digital transmission system for loudspeakers.
  • [0002] [0002]
    Il est connu des systèmes de haut-parleurs sans fil dans lesquels un signal audio analogique est converti en signal à modulation de fréquence, ce signal à modulation de fréquence étant transmis sur les lignes d'alimentation au courant alternatif d'un réseau domestique. There are known wireless speaker systems in which an analog audio signal is converted into frequency modulated signal, frequency-modulated signal being transmitted over the power lines to the alternating current of a home network. Le signal reçu par le réseau domestique est ensuite reconverti en un signal audio après extraction du signal de fréquence modulée. The signal received by the home network is then converted into an audio signal after extracting the frequency modulated signal.
  • [0003] [0003]
    Un tel enseignement est notamment divulgué par le brevet US 4 829 570. Ce brevet envisage, en outre, l'utilisation d'un dispositif de compression pour permettre la compression des signaux analogiques délivrés par un lecteur de disque compact, dont la plage dynamique large nécessite une très large bande passante pour permettre la transmission en modulation de fréquence. Such teaching is in particular disclosed in US Patent 4 829 570. This patent further contemplates the use of a compression device to allow the compression of analogue signals from a compact disc player, the wide dynamic range requires very high bandwidth to enable frequency modulation transmission. La large bande et les déviations importantes posent de nombreux problèmes qui sont résolus dans ce document par l'utilisation d'un circuit compresseur pour réduire la plage dynamique totale du signal audio. Broadband and significant deviations pose many problems that are fixed in this document by the use of a compressor circuit to reduce the total dynamic range of the audio signal. Ce document nous permet déjà de prendre conscience d'une première difficulté qui est la limitation des systèmes stéréophoniques en particulier utilisant la modulation de fréquence et fonctionnant avec des systèmes analogiques tels que des oscillateurs à fréquence variable. This document already allows us to realize a first difficulty is the limitation of stereophonic systems especially using frequency modulation and operating with analog systems such as variable frequency oscillators.
  • [0004] [0004]
    Lorsqu'on veut passer de la qualité stéréophonique simple à la qualité stéréophonique du type "CD Numérique", la quantité d'informations à transmettre est telle que l'on est très vite limité en modulation de fréquence par la bande passante. When we want to go from simple stereo to stereo quality quality type "CD Digital", the amount of information to be transmitted is such that one is quickly limited frequency modulation bandwidth.
  • [0005] [0005]
    Enfin, ce type de système enseigné par le brevet US 4 829 570 est acceptable pour des utilisations à des fins privées sur le réseau domestique d'une habitation personnelle mais peut être difficilement mis en place dans un immeuble ou encore moins dans des collectivités ou des ensembles commerciaux. Finally, this type of system taught by US Patent 4,829,570 is acceptable for uses for private purposes in the home network of a personal residence but can be easily set up in a building or even less in communities or commercial developments. En effet, la musique diffusée sur le réseau d'alimentation sera captée au même moment par tous les haut-parleurs installés et connectés au réseau. Indeed, the music played on the supply network will be captured at the same time by all the speakers installed and connected to the network. Ceci pose un problème de règlement des droits d'auteur et il est donc souhaitable de prévoir un dispositif qui permette d'éviter une diffusion généralisée. This poses a copyright settlement problem and it is therefore desirable to provide a device that avoids widespread dissemination.
  • [0006] [0006]
    Enfin, un tel dispositif nécessite, pour avoir les deux canaux stéréophoniques, de prévoir une première fréquence porteuse pour le premier canal et une seconde fréquence porteuse pour le second canal. Finally, such a device requires, for the two stereophonic channels, providing a first carrier frequency for the first channel and a second carrier frequency for the second channel. Ces fréquences devront être sélectionnées selon des conditions bien précises, ce qui va limiter également les possibilités de la bande passante. These frequencies should be selected according to specific conditions, which will also limit the possibilities of bandwidth.
  • [0007] [0007]
    Un premier but de l'invention est de proposer un système sans fil à transmission numérique pour haut-parleurs qui permette la diffusion des signaux stéréophoniques de qualité compact disque numérique et/ou la commande à distance. A first object of the invention is to provide a wireless digital transmission system for wireless speakers that allow the dissemination of stereophonic signals to digital compact disc quality and / or the remote control.
  • [0008] [0008]
    Ce premier but est atteint par le fait que le système sans fil à transmission numérique pour haut-parleurs comporte : This goal is achieved by the fact that the system without digital transmission wire for speakers includes:
    • des moyens de compression du fichier représentatif du signal numérique audio de type "Compact disque", un dispositif d'émission comportant des moyens de transformation de ce signal compressé en signal série circulant par paquets à destination d'un circuit modulateur à quadrature de phases et des moyens de transmettre les signaux sortant du circuit modulateur à quadrature de phases au réseau domestique d'alimentation en électricité ; compression means of the file representing the type of digital audio signal "Compact Disc", a transmitting device comprising means for transforming this compressed signal into serial signal circulating by packet to a quadrature phase modulator circuit and means to transmit the output signals from the phase quadrature modulator circuit to the domestic electrical supply network;
    • un dispositif de réception comportant des moyens de branchement sur ce réseau domestique et d'extraire du signal d'alimentation en électricité par un démodulateur à quadrature de phases les paquets d'informations véhiculant le signal numérique audio pour le transformer en un signal numérique parallélisé envoyé vers un circuit de décompression ; a receiving device having connection means for this domestic network and extracting electricity supply signal by a phase quadrature demodulator in the information packets carrying the digital audio signal to convert it into a parallelised digital signal sent to a decompression circuit;
    • des moyens de transformer les signaux numériques décompressés en un signal analogique destiné à alimenter un haut-parleur après amplification adéquate. means for transforming the decompressed digital signals into an analogue signal intended to supply a loudspeaker after suitable amplification.
  • [0009] [0009]
    Un second but est de permettre l'émission de plusieurs signaux musicaux à destination de différents haut-parleurs. A second object is to enable the emission of several music signals to different speakers.
  • [0010] [0010]
    Ce but est atteint par le fait que les moyens de sérialisation comportent des moyens d'insérer dans les paquets de signaux sérialisés une adresse de destination ; This object is achieved in that the serialization means comprise means for inserting in the signal packets serialized a destination address;
    et en ce que les moyens de réception comportent des moyens de comparer l'adresse figurant dans le paquet reçu avec l'adresse spécifique au dispositif de réception auquel le haut-parleur est relié. and in that the receiving means comprise means for comparing the address contained in the received packet with the address specific to the reception device to which the loudspeaker is connected.
  • [0011] [0011]
    Selon une autre particularité, le dispositif de sérialisation comporte des moyens de multiplexer plusieurs trames de fichiers numériques représentatifs d'un signal audio différent à destination d'adresses différentes. According to another feature, the serialization device comprises means for multiplexing several frames of digital files representing a different audio signal to different addresses.
  • [0012] [0012]
    Un autre but de l'invention est de proposer un système qui permette de s'assurer que les droits d'auteur ne peuvent pas être fraudés. Another object of the invention to provide a system to ensure that copyright can not be defrauded.
  • [0013] [0013]
    Ce troisième but est atteint par le fait que les circuits d'émission comportent un circuit d'encryptage et le dispositif de réception connecté comporte un circuit de décryptage utilisant une clé secrète mémorisée dans la mémoire du circuit de désérialisation. This third object is achieved in that the transmission circuits comprise an encryption circuit and the connected reception device comprises a decryption circuit using a secret key stored in the memory of the deserialisation circuit.
  • [0014] [0014]
    Selon une autre particularité, les informations du signal numérique sont sérialisées selon un protocole comportant une première partie constitutive des informations de protocole, une deuxième partie constitutive de l'adresse du destinataire, une troisième partie constituant le signal numérique ou les signaux numériques multiplexés, et une quatrième partie constitutive de l'information de fin de protocole. According to another feature, the digital information signal is serialized according to a protocol comprising a first component part of the protocol information, a second constituent part of the address of the recipient, a third part constituting the digital signal or the multiplexed digital signals, and a fourth constituent part of the end information protocol.
  • [0015] [0015]
    Selon une autre particularité, le protocole comporte une cinquième partie constitutive des information de contrôle des haut-parleurs. In another feature, the protocol comprises a fifth constituent part of the speaker control information.
  • [0016] [0016]
    Selon une autre particularité, le protocole comporte une sixième partie constitutive d'au moins une clé d'encryptage. According to another feature, the protocol comprises a sixth part constituting at least one encryption key.
  • [0017] [0017]
    Selon une autre particularité, le système comprend des moyens pour inclure des commande de contrôle permettant le réglage individuel de chaque haut-parleurs, dans le signal série circulant par paquet. According to another particularity, the system comprises means for including control command to the individual adjustment of each loudspeaker, in the serial signal circulating by packet.
  • [0018] [0018]
    Selon une autre particularité, le système In another feature, the system
    comprend des moyens de conversion d'un signal analogique en signal numérique, disposé en amont des moyens de compression du fichier représentatif du signal audio, lorsque le signal audio à transmettre est de type analogique. comprises means for converting an analog signal into a digital signal, arranged upstream of the means for compressing the file representing the audio signal when the audio signal to be transmitted is of the analogue type.
  • [0019] [0019]
    D'autres caractéristiques et avantages de la présente invention apparaítront plus clairement à la lecture de la description ci-après faite en référence aux dessins annexés dans lesquels : Other features and advantages of the present invention will become more apparent from reading the following description with reference to the accompanying drawings in which:
    • la figure 1 représente une vue schématique du circuit électronique permettant la mise en oeuvre de l'invention ; 1 shows a schematic view of the electronic circuit for the implementation of the invention;
    • la figure 2 représente une vue schématique d'un système audiovisuel de type "Juke-box" dans lequel le dispositif de l'invention peut être utilisé. 2 shows a schematic view of an audiovisual system type "Jukebox" in which the device of the invention can be used.
  • [0020] [0020]
    L'invention va maintenant être décrite en liaison avec la figure 1 sur laquelle la référence (13) désigne les deux conducteurs d'un réseau domestique d'alimentation en énergie électrique d'un immeuble ou d'un local destiné à accueillir un public ou une collectivité tel que par exemple un bar, un grand magasin, une enceinte sportive, etc... . The invention will now be described in connection with Figure 1 in which the reference (13) denotes the two conductors of a home network of electric power supply of a building or premises for accommodating a public or a community such as for example a bar, a store, a sports arena, etc .... Sur ce réseau d'alimentation électrique est branché un dispositif d'émission (10) comportant l'enroulement primaire d'un premier transformateur (108) lequel délivre par son enroulement secondaire à travers un circuit de redressement à diodes un signal d'alimentation à un circuit (100) d'alimentation qui extrait, du signal de courant alternatif du secteur redressé, les signaux nécessaires à l'alimentation des différents circuits du dispositif. On this power supply network is connected a transmitting device (10) comprising the primary winding of a first transformer (108) which delivers via its secondary winding through a diode rectifying circuit to a power signal a circuit (100) power supply which extracts the alternating current signal of the rectified area, the necessary signals to the power the various circuits of the device. En parallèle, sur le primaire de ce premier transformateur (108) est branché un second transformateur (109) dont l'enroulement secondaire est alimenté à travers un transistor par un circuit (101) de modulation à quadrature de phases. In parallel on the primary of the first transformer (108) is connected a second transformer (109) whose secondary winding is fed through a transistor by a circuit (101) of quadrature phase modulation. Ce circuit (101) est alimenté en tension par le circuit (100) et reçoit d'un microcontrôleur (102) des flots de paquets (P1, P2) de données représentant des informations numériques sérialisées selon un protocole (P) représenté en dessous. This circuit (101) is supplied with voltage by the circuit (100) and receives from a microcontroller (102) the streams of packets (P1, P2) of data representing digital information serialized according to a protocol (P) shown below. Ce protocole (P) comporte une première partie (IP) constitutive des informations de protocole, une deuxième partie (AD) constitutive de l'adresse du destinataire ou des adresses de chacun des destinataires, une éventuelle troisième partie (IC) constitutive des informations de contrôle des haut-parleurs, une éventuelle quatrième partie (CE) constitutive d'une clé d'encryptage ou de plusieurs clés, chacune pour une adresse, une cinquième partie (SNA) constitutive du signal numérique audio ou des signaux audio multiplexés, chaque signal étant associé à une des adresses du destinataire et enfin, une sixième partie (IFP) constitutive de l'information de fin de protocole. This protocol (P) comprises a first part (IP) constituting protocol information, a second part (AD) constituting the address of the recipient or addresses of each recipient, a third part potential (IC) information constitutes control speakers, a possible fourth part (EC) constitutes an encryption key or multiple keys, each for an address, a fifth part (SNA) constituting the digital audio signal or the multiplexed audio signals, each signal being associated with a recipient's address and finally a sixth part (IFP) constituting end information protocol.
  • [0021] [0021]
    Les signaux sont modulés en quadrature de phases par le circuit (101) sur une porteuse,située entre 200 et 300 kHz et sont superposés au signal alternatif du secteur par l'intermédiaire du transformateur (109). The signals are quadrature-modulated by the phase circuit (101) on a carrier, located between 200 and 300 kHz are superimposed on the alternating signal from sector via the transformer (109). Les signaux numériques audio provenant de la source audio, après compression, représentent un débit numérique de 128 kilo bits par seconde et sont traités par le microcontrôleur (102) pour être envoyés par paquets successifs selon le protocole (EP) explicité ci-dessus. The digital audio signals from the audio source, after compression, represent a digital rate of 128 kilo bits per second and are processed by the microcontroller (102) to be sent by successive packets according to the protocol (EP) explained above.
  • [0022] [0022]
    Le programme du microcontrôleur (102) peut être agencé pour effectuer le multiplexage de plusieurs sources audio permettant par exemple, d'envoyer un morceau de musique classique à destination d'un premier haut-parleur pendant qu'on envoie au même moment un morceau de musique de jazz à destination d'un deuxième haut-parleur, chacun ayant une adresse spécifique et sa propre clé de décryptage. The microcontroller program (102) can be arranged to perform the multiplexing of multiple audio sources allowing for example, to send a piece of classical music to a first speaker for being sent at the same time a piece of jazz music to a second speaker, each with a specific address and its own decryption key.
  • [0023] [0023]
    Dans ce cas, le dispositif (10) adresse une ou plusieurs trames à un utilisateur identifié par une carte ou un boítier (11 ) connecté au haut-parleur. In this case, the device (10) address one or more frames to a user identified by a card or a housing (11) connected to the loudspeaker. Le dispositif d'émission (10) et le ou les dispositifs de réception (11) ne sont reliés entre eux qu'à travers les conducteurs électriques du réseau domestique d'alimentation électrique. The transmitting device (10) and the one or more receiving devices (11) are connected together only through the electrical conductors of the domestic electrical supply network.
  • [0024] [0024]
    Enfin, le programme de fonctionnement du microcontrôleur (102) permettra lors de la réception de commandes envoyées par un boítier de télécommande (12), émettant par exemple un signal d'ondes à destination d'un capteur (1020), d'inclure les commandes ainsi générées par ce boítier (12) dans le paquet, de façon à constituer les informations de contrôle du haut-parleur. Finally, the microcontroller of the operating program (102) will upon receipt of commands from a remote control (12), emitting for example a wave signal to a sensor (1020), include commands thus generated by the housing (12) in the package, so as to constitute the speaker control information. Ces informations de contrôle permettent le réglage individuel de chaque haut-parleur en réglant le canal droit, le canal gauche, les basses, les aigus, le volume, etc.... . These control information allows individual adjustment of each speaker by setting the right channel, the left channel, bass, treble, volume, etc .....
  • [0025] [0025]
    Lorsque l'on souhaite protéger les informations audio véhiculées sur le réseau domestique, de façon à permettre la collecte des droits d'auteur et éviter que le même morceau musical puisse être écouté par des gens n'ayant pas acquitté les droits d'auteur, on ajoutera dans le dispositif un circuit d'encryptage (103) placé entre le circuit de compression (104) et le microcontrôleur (102). When one wishes to protect the audio information conveyed on the home network, to enable copyright collection and prevent the same piece of music can be listened to by people who have not paid the copyright, be added in the device an encryption circuit (103) placed between the compression circuit (104) and the microcontroller (102). Dans le cas où la source des signaux musicaux n'est pas du type "Numérique", on adjoint au dispositif un convertisseur analogique numérique (106) recevant sur son entrée les signaux de sortie d'un amplificateur analogique (107), lequel reçoit les signaux audio analogiques. In the case where the source music signals is not of the type "Numeric", there is added to the device a digital analog converter (106) receiving at its input the output signals of an analog amplifier (107), which receives the analog audio signals.
  • [0026] [0026]
    Le dispositif de réception (11) est constitué comme précédemment par un premier transformateur (118) permettant à l'aide d'un circuit redresseur, d'alimenter un circuit (110) d'alimentation destiné à générer les signaux d'alimentation nécessaires au fonctionnement des différents circuits du dispositif de réception (11). The receiving device (11) is formed as previously by a first transformer (118) for using a rectifier circuit, to feed a circuit (110) power for generating the power supply signals necessary to operation of the various circuits of the receiving device (11). Un deuxième transformateur (119) branché sur le primaire du premier, à l'aide d'une capacité de découplage, alimente un démodulateur (111) à quadrature de phases, lequel fournit sur sa sortie série les signaux de protocole et les paquets de protocole à un microcontrôleur (112) qui transforme ces signaux série en signaux parallèles à destination d'un circuit de décryptage (113), dont la sortie est branchée à un circuit de décompression (114). A second transformer (119) connected to the primary of the first, using a decoupling capacitor, feeds a demodulator (111) phase quadrature, which provides on its output the serial protocol signals and the protocol packets a microcontroller (112) that transforms these serial signals into parallel signals to a decryption circuit (113), whose output is connected to a decompression circuit (114). La sortie du circuit de décompression (114) est elle-même branchée à un circuit de conversion numérique analogique (115), dont la sortie est destinée à alimenter un haut-parleur (HP). The output of the decompression circuit (114) is itself connected to a digital-analog conversion circuit (115) whose output is intended to supply a loudspeaker (HP). Les circuits de compression et de décompression par un amplificateur (116) mettent en application un algorithme de type "MPEG" de niveau 3 et le circuit d'encryptage (103) et de décryptage (113) mettent en application un algorithme de type "MMPP" (MultiMédia Protection Protocole). The compression circuitry and decompression by an amplifier (116) implement an algorithm of the "MPEG" level 3 and the encryption circuit (103) and decryption (113) implement an algorithm of the "MMPP "(MultiMedia Protection Protocol).
  • [0027] [0027]
    La mémoire du microcontrôleur (112) du boítier (11) est chargée avec l'adresse d'identification qui permet de comparer son adresse, à l'adresse reçue dans le paquet pour identifier si les informations numériques audio lui sont destinées ou sont destinées à un autre haut-parleur. The memory of the microcontroller (112) of the housing (11) is loaded with the identification address which compares its address to the address received in the packet to identify whether the digital audio information is it intended or designed to another speaker. De même, la mémoire du microcontrôleur est chargée lors de l'initialisation ou à la fabrication avec une clé de décryptage. Similarly, the memory of the microcontroller is loaded during initialization or manufacture with a decryption key. Le chargement lors de l'initialisation avec la clé de décryptage peut se faire grâce à la quatrième zone du protocole. Loading during initialization with the decryption key may be done through the fourth zone of the protocol.
  • [0028] [0028]
    Les circuits convertisseurs analogiques numériques (CAN/ou CNA) de compression d'encryptage et d'amplification du dispositif émetteur (10) peuvent être réalisés, par exemple, par un processeur digital de signal commercialisé par MOTOROLA sous la référence 563XX et communément appelé "DSP (Digital Signal Processor)". Routes analog-digital converters (ADC / or DAC) of encryption compression and amplification of the transmitter device (10) can be made, for example, by a digital signal processor available from Motorola under the reference 563XX and commonly called " DSP (Digital Signal Processor). "
  • [0029] [0029]
    De même, les circuits de décryptage, de décompression et de conversion numérique analogique du dispositif récepteur (11) peuvent être réalisés dans un processeur digital de signal commercialisé par MOTOROLA sous la référence 563XX et communément appelé "DSP (Digital Signal Processor)". Similarly, the decryption circuits, decompression and digital to analog conversion (11) receiving device can be realized in a digital signal processor available from Motorola under the reference 563XX and commonly called "DSP (Digital Signal Processor)".
  • [0030] [0030]
    On peut ainsi, grâce à un tel dispositif, permettre l'implantation de haut-parleurs multiples dans des locaux différents sous réserve qu'ils soient alimentés par la même phase du réseau auquel le dispositif de transmission (10) sera relié. It is thus possible, through such a device, allow multiple speakers implantation in different premises provided that they are powered by the same phase of the network to which the transmission device (10) will be connected. Ce dispositif de transmission (10) devra d'une part être connecté à une source de signaux audio qui pourra être par exemple la sortie numérique d'un lecteur de disque compact ou bien la sortie numérique d'un disque dur d'un juke-box tel que celui décrit dans la figure 2 et correspondant à la demande de brevet PCT FR 95 01333 publiée sous le numéro WO 96/ 12 256 et d'autre part aux conducteurs du réseau d'alimentation électrique de l'immeuble ou du local. This transmission device (10) will firstly be connected to a source of audio signals which can be for example the digital output from a CD player or the digital output from a hard disk of a juke box such as that described in Figure 2 and corresponding to PCT patent application FR 95 01333 published under the number WO 96/12 256 and the other to the conductors of the power supply of the building or the local network. Le juke-box de la figure 2 est constitué par une unité centrale (1), un microprocesseur qui est un système compatible au PC de haute performance. The jukebox of Figure 2 is constituted by a CPU (1), a microprocessor which is a system compatible with high performance PC. Le choix lors de la mise en oeuvre s'est porté sur un système du type "lntel 80486 DX/2" qui possède des moyens de mémorisation et les caractéristiques suivantes : The choice when the implementation is carried on a system of the type "lntel 80486 DX / 2" which has storage means and the following characteristics:
    • compatibilité avec le bus local Vesa, compatibility with the local Vesa bus,
    • antémémoire du processeur : 256 kO, processor cache 256 kO,
    • ports série et parallèle de haute performance, serial and parallel ports of high-performance,
    • adaptateur graphique type SVGA à microprocesseur, Graphics adapter SVGA type microprocessor,
    • contrôleur de bus type SCSl/2, bus controller such SCSL / 2,
    • mémoire vive RAM statique auto-alimentéé. RAM static self-powered.
  • [0031] [0031]
    Toute autre unité centrale possédant des performances équivalentes ou supérieures pourra être utilisée dans l'invention. Any other CPU having equivalent or superior performance can be used in the invention.
  • [0032] [0032]
    Cette unité centrale commande et gère un circuit de commande de son (5), un circuit (4) de commande des télécommunications, un circuit (3) de commande des entrées, un circuit (2) de commande de la mémorisation de masse, un circuit (6) de commande des moyens de visualisation. This CPU controls and manages a sound control circuit (5), a circuit (4) for controlling the telecommunications, a circuit (3) for controlling the input, a circuit (2) for controlling the mass memory, a circuit (6) for controlling the display means. Les moyens de visualisation se composent principalement d'un moniteur vidéo (62) à écran plat de 14 pouces (35,56 cm) sans entrelacement de type SVGA à haute résolution et faible rayonnement, c'est ce moniteur qui est utilisé pour la reproduction d'images (par exemple, les couvertures d'albums des sélections musicales), de graphiques ou de clips vidéo. The display means comprise mainly a video monitor (62) 14-inch flat screen (35.56 cm) without interleaving of the SVGA type, with high resolution and low radiation, it is this monitor which is used for reproduction Images (eg music selections album covers), graphics or video clips.
  • [0033] [0033]
    Des moyens de mémorisation de masse (21) utilisant des disques durs de type "SCSl" haute vitesse et haute capacité, sont associés aux moyens de mémorisation déjà présents dans le dispositif à microprocesseur. Mass storage means (21) using hard disks type "SCSL" high speed and high capacity, are connected to the storage means already present in the microprocessor device. Ces moyens servent au stockage d'informations audiovisuelles numérisées et compressées. These means are used to store digitized and compressed audiovisual information.
  • [0034] [0034]
    Un adaptateur de modem de télécommunications (41) haute vitesse 28,8 kbps est intégré pour autoriser la liaison avec un réseau de distribution d'informations audiovisuelles contrôlé par un serveur central. A telecommunications modem adapter (41) High Speed ​​28.8 kbps is integrated to allow connection to a distribution network of audiovisual information controlled by a central server.
  • [0035] [0035]
    Pour la reproduction des informations sonores des sélections musicales, le système comporte des haut-parleurs (54) recevant le signal d'amplificateur-tuner (53) relié à un circuit électronique (5) de type "Synthétiseur de musique" prévu pour supporter un grand nombre de sources d'entrée tout en fournissant une sortie présentant une qualité de type "CD" (disque compact), telle que par exemple, l'adaptateur audio multimédia à microprocesseur, du type "carte "Sound Blaster"" SBP32AWE de chez Creative Labs Inc sur lequel deux tampons mémoire (56, 57) sont ajoutés dans le but explicité ultérieurement. To reproduce the audio data of the musical selections, the system includes speakers (54) receiving the signal receiver amplifier (53) connected to an electronic circuit (5) type "music synthesizer" provided for supporting a large number of input sources while providing an output with a quality type "CD" (CD), as for example the microprocessor multimedia audio adapter, type "map" Sound Blaster "" SBP32AWE home Creative Labs Inc. on which two memory buffers (56, 57) are added to the purpose to be explained.
  • [0036] [0036]
    De même, le circuit de commande des moyens de visualisation comporte également deux mémoires tampon (66, 67) dans le but explicité ultérieurement. Similarly, the control circuit of the display means also includes two buffers (66, 67) in purpose to be explained.
  • [0037] [0037]
    Une alimentation thermiquement régulée de 240 watts ventilée fournit l'énergie au système. A thermally controlled 240 watt ventilated power supply provides power to the system. Cette alimentation est protégée contre les surintensités et les suroscillations. This power supply is protected against surges and harmonics.
  • [0038] [0038]
    Le système de reproduction audiovisuelle gère, par le biais de son circuit contrôleur d'entrée (3), un écran tactile (33) "lntelli Touch" de 14 pouces (35,56 cm) de chez Elo Touch Systems Inc., qui inclut un panneau de revêtement de la vitre utilisant la "technologie avancée d'onde de surface" ainsi qu'un contrôleur de bus de type "AT". The audiovisual reproduction system manages, through its input controller circuit (3), touch screen (33) "lntelli Touch" 14-inch (35.56 cm) from Elo Touch Systems Inc. which includes a covering panel of the pane using "advanced surface wave" and a type of bus controller "AT". Cet écran tactile permet ,après avoir affiché sur le moniteur vidéo (62) ou l'écran d'un téléviseur (61), diverses informations de sélection utilisées par les clients ainsi que des informations de sélection utilisées par les clients, ainsi que des informations de commandes et de contrôle de gestion utilisées par le gérant ou le propriétaire du système. This touch screen allows, after having displayed on the video monitor (62) or a TV Screen (61), various selection information used by customers as well as selection information used by customers, as well as information controls and management controls used by the manager or owner of the system. Il est également utilisé à des fins de maintenance en combinaison avec un clavier externe (34) qui peut être relié au système qui possède pour cela un connecteur de clavier, contrôlé par un verrou à clé (32) à travers le circuit d'interface (3). It is also used for maintenance purposes in combination with an external keyboard (34) which can be connected to the system it has to a keyboard connector controlled by a key lock (32) through the interface circuit ( 3).
  • [0039] [0039]
    Le circuit d'entrée (3) interface également avec le système télécommande (31) constitué par exemple : The input circuit (3) also interface with the remote system (31) consisting, for example:
    • d'une télécommande infrarouge de chez Mind Path Technologies Inc., émetteur qui possède 15 touches de commande pour le système à microprocesseur et 8 touches de commande pour dispositif de projection, an infrared remote control from Mind Path Technologies Inc., an emitter which has 15 control keys for the microprocessor system and 8 control keys for the projection device,
    • d'un récepteur infrarouge avec adaptateur série de chez Mind Path Technologies Inc. an IR receiver with serial adapter from Mind Path Technologies Inc.
  • [0040] [0040]
    Un dispositif de paiement de redevances (35) de chez National Rejectors Inc. est également relié au circuit d'interface d'entrée (3). A fee payment device (35) from National Rejectors Inc. is also connected to the input interface circuit (3). Il est également possible d'utiliser tout autre dispositif qui permette la réception de tout mode de paiement par pièces, billets, jetons, cartes magnétiques à puces ou combinaison des moyens de paiement. It is also possible to use any other device which allows receipt of any payment by coins, paper money, tokens, magnetic chip cards or a combination of means of payment.
  • [0041] [0041]
    Pour loger le système, il est de plus prévu un châssis ou bâti en acier avec garnitures extérieures personnalisables. To house the system, there is further provided a frame or steel frame with customizable exterior trim.
  • [0042] [0042]
    Outre ces éléments, un microphone (55) sans fil est relié au contrôleur de son (5), ce qui permet de transformer ce dernier en un puissant système d'annonces et d'informations destinées au public ou éventuellement en machine de karaoké. Besides these components, a microphone (55) Wireless is connected to the controller (5), which transforms it into a powerful ads and information system for the public or possibly a karaoke machine. De même, un système de haut-parleurs sans fil peut être utilisé par le système. Similarly, a wireless speaker system can be used by the system.
  • [0043] [0043]
    L'ensemble (31) de commande à distance permet au gérant, par exemple de derrière le bar, d'accéder et de contrôler différentes commandes telles que : All (31) remote control allows the manager, for example from behind the bar, to access and control various commands such as:
    • la commande marche-arrêt du microphone, the on-off control of the microphone,
    • la commande de mise en sourdine des haut-parleurs, control muting the speakers,
    • la commande de contrôle de volume sonore, the drive control volume,
    • la commande d'annulation de la sélection musicale en train d'être écoutée. the cancel command of the musical selection being played.
  • [0044] [0044]
    Deux tampons (56, 57) sont associés au circuit contrôleur de son (5) pour permettre de mémoriser chacun de façon alternative une information correspondant à un quart de seconde de son. Two buffers (56, 57) are associated with the sound controller circuit (5) for storing each alternatively information corresponding to a second sound shift. De même, deux tampons (66, 67) sont associés au circuit contrôleur de vidéo (6) capables chacun et alternativement de mémoriser un dixième de seconde d'images. Similarly, two buffers (66, 67) are associated with the video controller circuit (6) and each capable of alternately storing a tenth of a second image. Enfin, un tampon respectif (46, 36, 26) est associé à chacun des circuits de contrôleur de communication (4), d'interface d'entrée (3) et de mémorisation (2). Finally, a respective buffer (46, 36, 26) is associated with each of the communication controller circuit (4), input interface (3) and storing (2).
  • [0045] [0045]
    Les données audiovisuelles numérisées et compressées sont stockées dans les moyens de mémorisation (21). The digitized and compressed audiovisual data is stored in the storage means (21).
  • [0046] [0046]
    Ces informations sont transmises par l'intermédiaire de l'unité centrale (1) à la carte (105) sur laquelle on a rajouté les éléments correspondant au circuit (10), le circuit d'encryptage (103) étant directement connecté aux circuits tampon (56, 57) dans le cas où les informations sont déjà compressées, soit par un premier connecteur (1021), évitant le circuit d'encryptage (103), si les informations sont déjà encryptées ou n'ont pas besoin de l'être, soit par un deuxième connecteur (1031), utilisant le circuit d'encryptage (103), si les informations doivent être encryptées. This information is transmitted via the central unit (1) to the card (105) to which we added the elements corresponding to the circuit (10), the encryption circuit (103) being directly connected to the buffer circuits (56, 57) in the case where information is already compressed, or by a first connector (1021), avoiding the encryption circuit (103), if the information is already encrypted or do not need to be or by a second connector (1031), using the encryption circuit (103), whether the information should be encrypted. Dans le cas où les informations ne sont pas compressées, on connectera les tampons (56, 57) à un troisième connecteur (1041) de façon à utiliser le circuit de compression. In the case where the information is not compressed, the pads will be connected (56, 57) at a third connector (1041) so as to use the compression circuit.
  • [0047] [0047]
    Ainsi, en branchant la sortie du transformateur (108) sur le secteur, on pourra en connectant les circuits de réception (11) en différents endroits sur le secteur, alimenter différents haut-parleurs à distance, en plus des haut-parleurs normalement prévus dans le système juke-box (54). Thus, by connecting the output of the transformer (108) on the sector, it is possible by connecting the reception circuits (11) at different locations on the sector, power various speakers distance in addition to the speakers normally provided in the jukebox system (54). Ceci permettra une diffusion sonore de bonne qualité dans différents locaux tout en assurant au gestionnaire la possibilité de régler les volumes selon les locaux ou selon les dispositions des haut-parleurs. This will sound broadcast quality in different rooms while ensuring the manager can adjust the volume as local or as speakers provisions.
  • [0048] [0048]
    Dans le cas où l'invention est utilisée sur un autre dispositif tel que lecteur de compact disque, radio pour la réception de chaínes spécialisées, etc.... , il est possible d'équiper le dispositif de paiement à l'aide de l'un des moyens de paiement évoqué plus haut pour l'application juke-box qui comme pour le juke-box ne permettra le fonctionnement du dispositif de réception qu'une fois la redevance acquittée et pour la durée prévue pour la redevance. If the invention is used on another device such as compact disc player, radio to receive premium channels, etc .... it is possible to equip the payment device using the a means of payment referred to above for the jukebox application that like the jukebox will not allow the operation of the receiving device once the fee paid and the duration for the fee. Cette durée est déterminée par une horloge associée au dispositif de réception. This duration is determined by a clock associated with the receiving device.
  • [0049] [0049]
    D'autres modifications à la portée de l'homme de métier font également partie de l'esprit de l'invention. Other changes in the scope of the art are also part of the spirit of the invention.

Claims (9)

  1. Système sans fil à transmission numérique pour haut-parleurs comportant : without wire digital transmission system for loudspeakers comprising:
    des moyens de compression du fichier représentatif du signal numérique audio de type "Compact disque", un dispositif d'émission comportant des moyens de transformation de ce signal compressé en signal série circulant par paquets à destination d'un circuit modulateur à quadrature de phases et des moyens de transmettre les signaux sortant du circuit modulateur à quadrature de phases au réseau domestique d'alimentation en électricité ; compression means of the file representing the type of digital audio signal "Compact Disc", a transmitting device comprising means for transforming this compressed signal into serial signal circulating by packet to a quadrature phase modulator circuit and means to transmit the output signals from the phase quadrature modulator circuit to the domestic electrical supply network;
    un dispositif de réception comportant des moyens de branchement sur ce réseau domestique et d'extraire du signal d'alimentation en électricité par un démodulateur à quadrature de phases les paquets d'informations véhiculant le signal numérique audio pour le transformer en un signal numérique parallélisé envoyé vers un circuit de décompression ; a receiving device having connection means for this domestic network and extracting electricity supply signal by a phase quadrature demodulator in the information packets carrying the digital audio signal to convert it into a parallelised digital signal sent to a decompression circuit;
    des moyens de transformer les signaux numériques décompressés en un signal analogique destiné à alimenter un haut-parleur après amplification adéquate. means for transforming the decompressed digital signals into an analogue signal intended to supply a loudspeaker after suitable amplification.
  2. Système sans fil à transmission numérique pour haut-parleurs selon la revendication 1, caractérisé en ce que les moyens de sérialisation comportent des moyens d'insérer dans les paquets de signaux sérialisés une adresse de destination ; Wireless digital transmission system for loudspeakers according to Claim 1, characterized in that the serialization means comprise means for inserting in the signal packets serialized a destination address;
    et en ce que les moyens de réception comportent des moyens de comparer l'adresse figurant dans le paquet reçu avec l'adresse spécifique au dispositif de réception auquel le haut-parleur est relié. and in that the receiving means comprise means for comparing the address contained in the received packet with the address specific to the reception device to which the loudspeaker is connected.
  3. Système sans fil à transmission numérique pour haut-parleurs selon la revendication 1 ou 2, caractérisé en ce que le dispositif de sérialisation comporte des moyens de multiplexer plusieurs trames de fichiers numériques représentatifs d'un signal audio différent à destination d'adresses différentes. Wireless digital transmission system for loudspeakers according to Claim 1 or 2, characterized in that the serialization device comprises means for multiplexing several frames of digital files representing a different audio signal to different addresses.
  4. Système sans fil à transmission numérique pour haut-parleurs selon la revendication 1, caractérisé en ce que les circuits d'émission comportent un circuit d'encryptage et le dispositif de réception connecté comporte un circuit de décryptage utilisant une clé secrète mémorisée dans la mémoire du circuit de désérialisation. without wire digital transmission system for loudspeakers according to Claim 1, characterized in that the transmission circuits comprise an encryption circuit and the connected reception device comprises a decryption circuit using a secret key stored in the memory of deserialization circuit.
  5. Système de transmission numérique pour haut-parleurs selon la revendication 1 à 4 caractérisé en ce que les informations du signal numérique sont sérialisées selon un protocole comportant une première partie (IP) constitutive des informations de protocole, une deuxième partie (AD) constitutive de l'adresse du destinataire, une troisième partie (SNA) constituant le signal numérique ou les signaux numériques multiplexés, et une quatrième partie (IFP) constitutive de l'information de fin de protocole. Digital transmission system for loudspeakers according to Claim 1 to 4, characterized in that the digital signal information is serialized according to a protocol comprising a first part (IP) constituting protocol information, a second part (AD) constituting the address of the recipient, a third part (SNA) constituting the digital signal or the multiplexed digital signals, and a fourth part (IFP) constituting end information protocol.
  6. Système de transmission numérique pour haut-parleurs selon la revendication 5 caractérisé en ce que le protocole comporte une cinquième partie (IC) constitutive des information de contrôle des haut-parleurs. Digital transmission system for loudspeakers according to Claim 5 characterized in that the protocol comprises a fifth part (IC) constituting the speaker control information.
  7. Système de transmission numérique pour haut-parleurs selon la revendication 5 caractérisé en ce que le protocole comporte une sixième partie (CE) constitutive d'au moins une clé d'encryptage. Digital transmission system for loudspeakers according to Claim 5 characterized in that the protocol comprises a sixth part (CE) constituting at least one encryption key.
  8. Système de transmission numérique pour haut-parleurs selon la revendication 1 à 7 caractérisé en ce qu'il comprend des moyens pour inclure des commande de contrôle permettant le réglage individuel de chaque haut-parleurs, dans le signal série circulant par paquet. Digital transmission system for loudspeakers according to Claim 1 to 7, characterized in that it comprises means for including control command to the individual adjustment of each loudspeaker, in the serial signal circulating by packet.
  9. Système de transmission numérique pour haut-parleurs selon la revendication 1 à 7 caractérisé en ce qu'il comprend des moyens de conversion d'un signal analogique en signal numérique, disposé en amont des moyens de compression du fichier représentatif du signal audio, lorsque le signal audio à transmettre est de type analogique. Digital transmission system for loudspeakers according to Claim 1 to 7, characterized in that it comprises means for converting an analog signal into a digital signal, arranged upstream of the means for compressing the file representing the audio signal, when the audio signal to be transmitted is of the analogue type.
EP19980402266 1997-09-26 1998-09-15 Wireless system with digital transmission for loudspeakers Active EP0909112B1 (en)

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FR9712007A FR2769165B1 (en) 1997-09-26 1997-09-26 wireless system has digital transmission for speakers

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EP (1) EP0909112B1 (en)
JP (3) JPH11163813A (en)
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DE (2) DE69820947T2 (en)
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FR (1) FR2769165B1 (en)

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