EP0724793B1 - Systeme professionnel de commutation et transmission bidirectionnelle a multiplexage temporel pour des signaux haute-fidelite audio-analogiques et audionumeriques et des signaux de commande et de controle - Google Patents
Systeme professionnel de commutation et transmission bidirectionnelle a multiplexage temporel pour des signaux haute-fidelite audio-analogiques et audionumeriques et des signaux de commande et de controle Download PDFInfo
- Publication number
- EP0724793B1 EP0724793B1 EP94931072A EP94931072A EP0724793B1 EP 0724793 B1 EP0724793 B1 EP 0724793B1 EP 94931072 A EP94931072 A EP 94931072A EP 94931072 A EP94931072 A EP 94931072A EP 0724793 B1 EP0724793 B1 EP 0724793B1
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- signals
- transmission
- command
- fidelity
- equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
- H04H60/04—Studio equipment; Interconnection of studios
Definitions
- the present invention relates to a professional system for bidirectional multiplex switching and transmission time for high-fidelity audio-analog signals and digital audio and command and control signals.
- Digital signal transmission devices in particular particular of digital audio signals such as those produced and treated in recording studios, stages and radio, television or concert hall control rooms present, in the case of certain applications, another number of problems.
- a second group of transmission systems is made up by digital transmission systems.
- Such an example of system is for example described in patent US-A-5,060,273.
- This system is based on the principle of signal multiplexing digitized. Sources are generally connected individually on one or more concentration boxes which bring them together in a multipair. This one is connected in a transmitter box which converts each signal by the through pre-amplification circuits. These circuits are remotely controlled from a master receiver by a link specific. Digital signals multiplexed in series are transmitted in light form, in one or more fibers optics, and thus feed several control rooms simultaneously. The digital nature of the signal allows it to be routed by electronic control and memorize different configurations. The transmitter remote control and the signals in the other direction is through a second link in optical fiber.
- Such a transmission device although solving previous device problems analog, i.e. less bulk and less weight, has other disadvantages, however, such as particular, the cost, the fragility of the transmission linked to the fragility of optical fibers and the impossibility of reconfiguring at leisure the configurations chosen so that the number of sources can be varied and the number of broadcast channels.
- the aim of the present invention is therefore to propose a professional switching and transmission system bidirectional with time multiplexing for signals high fidelity and command and control signals between a transmitter and receiver, simple to implement and little costly regardless of transmitter and receiver.
- Another object of the invention is to propose such a device extremely flexible, the transition from a configuration to a other being capable of being carried out in real time without intervention of a team of workers.
- the invention relates to a professional system for bidirectional switching and transmission with multiplexing at less time for high-fidelity audio-analog signals and digital audio and control signals and controls, such as those produced and processed in studios recording, scenes and control rooms for radio, television or sound systems, or concert halls, including a first two-way transmission support for conveying first frames produced by multiplexing said high fidelity signals and command and control signals between a first switching end device time and signal transmission, said transmitter, and a second time switching end equipment and signal transmission, called master receiver, characterized in what it also includes interface control means human-machine receiving the high-fidelity signals transmitted by input circuits included in the first end equipment and said command and control signals to monitor in real time evolution of different relative parameters to said signals and to control in real time configuration changes and adaptations in said first end equipment by means of said signals command and control.
- said man-machine interface control means include means for calculating memorized parameters dynamic to calculate high-fidelity signals for each first respective absolute values, means for memorize said absolute values, means for comparing respectively said first absolute values at second absolute values previously stored, and means for detecting and storing further absolute values large magnitudes among the absolute values compared.
- said man-machine interface control means include related computer processing means to said dynamic storage parameter calculation means and to addressing control means included in said second equipment to process and view in real time different information, control and routing blocks, corresponding respectively to transmission channels allocated in the system respectively to said signals high fidelity and to order in real time configuration changes and adaptations in said first end equipment by means of said signals command and control and this according to orders given by an operator, in particular by means of a pointing device such as mouse.
- the switching and bi-directional transmission system time multiplexing for audio signals and command and control, object of the invention comprises at minus two units, one called transmitter (E), the other called master receiver (RM), linked together by a bidirectional transmission such as cable.
- the transmitter (E), which constitutes the first end equipment of time transmission and signal transmission occurs generally, as shown in Figure 1, as a box comprising an electronic bus which can receive n modules.
- the n modules consist of a module responsible for the power supply of the box, of a control module of the transmission and n-2 modules which control either in input, either output each x analog signals or digital.
- the receiver (RM) has a configuration similar.
- the transmitter (E) and the receiver (RM) may have a similar shape to that shown in Figure 1.
- the input and output, as shown in Figure 2 are made up each of eight lanes, with witnesses for each lane light for clipping signal presence and presence of phantom power.
- the first module constitutes an input module
- the other two modules constitute output modules whose connection is tailored to the needs of the user.
- this type of module, transmitter and receiver having a configuration analogous it is possible to make the modular set of so as to vary infinitely the configurations. So, in a first configuration, it is possible to choose eight input modules for the transmitter and eight input modules output for the receiver. In this case, the configuration will have 64 source inputs and 64 source outputs.
- the transmitter three input modules, i.e. 24 inputs sources, an output module, i.e. 8 mix outputs and on the receiver, three output modules, i.e. 24 source outputs, one input module, i.e. 8 mixed inputs and two modules effect type input so as to have 16 effect inputs and two output modules to have 16 effect outputs.
- the realization of the transmitter and the receiver is therefore reveals perfectly simple and reliable while providing a many possibilities.
- Audio-analog and / or digital audio signals from various sound sources are brought in by appropriate cables on the transmitter input modules and are connected to it.
- the connection is represented by block 10 called the input circuit.
- these audio-analog signals are either multiplexed then converted and multiplexed again, either directly converted using a converter analog digital per se known represented in 11 in the Figure 3 then multiplexed by means of digital multiplexing 12 also known.
- a converter analog digital per se known represented in 11 in the Figure 3 then multiplexed by means of digital multiplexing 12 also known.
- at maximum can be sent to the addressing controller 16, eight different digital audio signals.
- Audio-analog input signals are introduced into a device 15 called transmission control device which has two blocks, namely an addressing controller 16 and a transmission synchronizer 18. As shown in the FIG.
- the receiver (R) comprises, analogously to the transmitter, input circuits shown at 30, conversion circuits shown in 35 and multiplexing represented at 28, a synchronizer of transmission 24 and an addressing controller 25 forming part part of a transmission control device 22.
- the output circuits corresponding to the output module are as for them connected to the addressing controller by a system of demultiplexing 19 for the transmitter and 27 for the part receiver. These parts of the circuit are intended to receive signals from the transmitter respectively receiver so as to send them to the output circuits to various elements, such as the mixer or devices for the receiver elements.
- the transmission data frames thus produced by multiplexing the high-fidelity signals between the transmitter (E) and the receiver master (RM) is carried out by means of a transmission medium bidirectional 21 which can be constituted by a cable coaxial of conventional type of the type adapted to the controllers of transmission 15 and 22.
- command and control signals can be transmitted between the transmitter and the receiver, these signals allowing order changes and adaptations of configuration 17 in transmitter E.
- control signals and control come from a control device to human-machine interface including a multi-comparator dynamic storage 26 receiving high-fidelity signals transmitted by input circuits 10 included in the first E end equipment, processing means IT 32, 33, 34 of the values calculated in the multi-comparator 26, said computer processing means also being connected to addressing control means 31 included in the receiver.
- the controller addressing 16 of the transmitter is intended to affect, towards the audio input 10 and output 14 circuits of the transmitter, the control signals 17 of their parameters, to affect the digital audio signals from the input multiplexers 12 to the transmission synchronizer 18 and / or to demultiplexers 19 of the output circuit 14, to affect the digital audio signals from synchronizer 18 to said synchronizers output multiplexers 19.
- the synchronizer of transmission it concatenates the multiplexing of signals digital audio using a process such as the 2B3Q process, transmits in the transmission member such as a coaxial cable the 2B3Q frame, it deconcatenates and transmits to the controller addressing 16 the digital audio signals and the command from the master receiver by the transmission such as cable 21.
- the transmission synchronizer 24 of the deconcatene receiver and transmits to the addressing controller 25 of the receiver the signals digital audio from the transmitter by the transmission medium 21; it transmits to the multi-comparator 26 all of the digital audio signals coming from the cable; it concatenates the multiplexing of digital audio signals and remote control from the addressing controller 25 according to a process such as the 2B3Q process; it emits in the organ of transmission medium 21 frame 2B3Q.
- the controller address 25 of the master receiver affects the signals digital audio from synchronizer 24 to said output multiplexers 27; it affects the signals digital audio input multiplexers 28 to the transmission synchronizer 24 and / or to said multiplexers 27 of the output circuit 29; he receives parallel link 32 control signals 31 parameters input 10 and output 14 audio circuits of the transmitter that it transmits to the transmission synchronizer 24; he receives control signals 31 from parallel link 32 parameters of the input and output circuits 29 and the affects them; it transmits the signals to the multi-comparator 26 digital audio of input circuits 30 and output 29 which would not be transmitted to the transmission synchronizer 24.
- said E, RM, RE end devices include processors 3 and extractors 13 of type 2B3Q for carrying out operations concatenation and deconcatenation respectively after multiplexing and before demultiplexing of the multiplexed frames, and in that the zero value is assigned to an initial value to be fixed in said processors 3 and extractors 13.
- the 2B3Q processors perform the combination of different states of the data coming from them in quartets including one is the zero volt value, the value at which the circuits addressing force the output of the transmission multiplexers thus putting the transmission line in reception mode. To obtain such a result, it is possible to set operates circuits according to Figures 6 and 7.
- control means are in particular constituted by a multi-comparator with dynamic storage 26 which includes means 26a for dynamic storage parameter calculation to calculate for each of the high-fidelity signals of the first values respective absolute means for storing said b 26b absolute values, 26c means to compare respectively said first absolute values to second values previously stored absolute values, and means 26d for detect and store absolute values of larger magnitudes among the absolute values compared.
- the operator defines the initial reference data R to R ', which are transmitted to the register.
- the comparator receives data P to P 'from the bus and RAM 3 data Q to Q 'whose respective addresses are defined by the address bus.
- the register receives simultaneously from the bus the data P to P '.
- the RAM being in read mode, transmits data to the operator Q to Q so that it performs any processing.
- the operator in order to refresh the data Q to Q 'in RAM 3 and to find there the initial reference values R to R ', the operator, by a command pulse, forces the register on its third state, puts the RAM in "write” mode and frees data from the registry to RAM; it can, from this done, put predefined data R to R 'in the RAM, and this simultaneously for all addresses.
- the memorized multi-comparator dynamic 26 receives from synchronizer 24 and controller 25 digital signals and, for each signal, calculates the absolute value, compare this value with the value previously stored and stores the largest value magnitude. These operations take place for each signal and simultaneously for all. Subsequently, it provides the link parallel 32 and at its request the last values stored and periodically receives a reset order from all these values. The parallel link 32 then ensures the exchange with IT equipment 33 with the appropriate software all of the data from multicomparator 26 and all the data coming from the computer 33. The user, next to the data displayed, translates the data from computer 33 in control signals for setting the input 10 and output 14 circuits of the transmitter and the output 29 and input 30 circuits of the master receiver. To do this, it transmits its signals command to controller 25.
- this processing device for each channel, it is possible from the computer keyboard to modify, by example, gain, phantom power (48 volts of each channel), modify parameters such as phase, channel cut, gain, label, choice of the route of entry, etc. Therefore, it is possible to act on each channel without any physical intervention, transmission of information and the execution of the order being almost done in real time.
- each channel is displayed in the form of a meter, a label, its track input, its output path, the presence of power ghost and cutting off the track.
- a pointing device appropriate (mouse, ball, cursor) the path to be modified and the selected parameter is modified.
- functions known per se such as the functions of saving, loading, etc.
- the device is made up for each site of a circuit including a part dedicated to the transmission (figure 6), the other on reception of the data (figure 7).
- One of the two sites is defined as master and, from this fact generates the time reference. This master is by convention called the transmitter, the other being the receiver.
- the transmitter is preferably consisting of the following: a parallel data bus bidirectional microprocessor type clocked by a bus address 4 allowing the device to access data from each channel to be transmitted, a clock circuit 1 ensuring the timing of the device, one or more circuits of logic multiplexing 6, a synchronization circuit 2 defining the time reference and frequency sampling, a concatenation circuit 3 of data from type 2B3Q and impedance adaptation of cable 9 and a circuit reception detection 7, a deconcatenation circuit 13 2B3Q frame, a data demultiplexing circuit 8, a data and address bus access device.
- the receiver consists of the same elements as those of the transmitter. However, the clock device ensuring the timing and data addressing is subject to the reference transmitter time transmitted by cable.
- the system also includes a plurality of second ancillary equipment for time switching and transmission of signals, called RE slave receivers, and a plurality of second transmission media 20, said plurality of second secondary equipment RE being connected to said first equipment E respectively through said plurality second transmission media 20, and said transmission media transmission 20 conveying seconds unidirectionally frames multiplexed in the direction of the first E equipment towards the second additional equipment RE.
- said means operator interface 26, 32, 33, 34 are included in said second time switching equipment and transmission of RM signals, and said second RM equipment is located in a mixing room and said seconds RE ancillary equipment is located in control rooms recording or broadcasting.
- slave receivers can have an architecture modular and include different standardized modules (input, output, control, power supply) housed in bays.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
- Television Systems (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Optical Communication System (AREA)
Description
- un bus de données cadencé par un bus d'adresse permettant au dispositif d'accéder aux données à traiter;
- un comparateur logique (ex 74HC681), éventuellement associé à un quelconque calculateur;
- deux registres logiques à trois états (ex 74HC374);
- une mémoire vive (ex RAM 6264);
- un opérateur logique quelconque requérant le résultat de la comparaison (ex IBM PC).
- place le registre en troisième état et, selon le résultat de la comparaison :
- soit autorise le registre à libérer les données P à P' et, simultanément, met la RAM en mode "écriture", ce qui a pour effet de remplacer les données Q à Q', jusqu'ici présente en mémoire, par les données P à P' qui deviennent, de ce fait, les nouvelles données Q à Q' ;
- soit bloque les données P à P' présentes dans le registre, et autorise celui-ci à se mettre à jour. D'autre part, la RAM est placée en mode "lecture" et autorise de ce fait une nouvelle opération de comparaison.
- le circuit d'horloge 1 émet dans le circuit de synchronisation 2 la référence temporelle qui définit la période d'échantillonnage. Le circuit de synchronisation 2 crée alors une impulsion qu'il transmet au processeur 3;
- l'horloge 1 cadence, également, le circuit d'adressage 4, qui détermine le cheminement des données à émettre du bus 5 aux multiplexeurs 6;
- les circuits de multiplexage produisent les données à émettre au processeur 3 en les sérialisant, selon les ordres du circuit d'adressage 4; on a représenté les différents états possibles de ces données sérialisées sur la figure 8 (données 1 et 2);
- le processeur 3 combine les données selon un procédé 2B3Q qui puisse produire un diagramme d'état tel que celui de la figure 8. Il émet alors, selon le chronogramme de la figure 8, vers l'adaptateur de ligne 9, la référence temporelle du circuit 2 et les données processées;
- après l'émission de la dernière donnée, le circuit d'adresse force l'état logique des sorties des multiplexeurs sur la valeur du cas 1 de la figure 8, mettant ainsi la ligne de transmission en mode de réception;
- l'adaptateur 9 fournit l'énergie nécessaire à la transmission et garantit l'adaptation d'impédance.
- après un délai proportionnel à la longueur du câble, le circuit 7, détectant l'arrivée de signaux de réception, transmet une impulsion au circuit d'horloge 1, qui relance le cadencement du circuit d'adresse 4;
- le processeur 13 réalise l'extraction des données du codage 2B3Q effectué dans le récepteur et les transmet en série vers les démultiplexeurs 8;
- les démultiplexeurs 8 convertissent les données série en données parallèles qu'ils transmettent sur le bus 5;
- le circuit d'adresse 4 détermine le cheminement des données reçues par la transmission dans les démultiplexeurs 8 et le bus 5.
- le détecteur 7, recevant les données provenant de l'émetteur, transmet, à travers un circuit de couplage optique 54, la référence temporelle au circuit d'horloge 1;
- l'horloge 1 s'asservit sur la référence temporelle par une boucle à verrouillage de phase et transmet au circuit d'adresse 4 les signaux de synchronisation;
- le circuit 13 extrait les données du codage 2B3Q transmis par l'émetteur et émet les données en série vers les démultiplexeurs 8 à travers le couplage optique 54;
- les démultiplexeurs 8 transmettent les données, dans leur format original, au bus selon les adresses du contrôleur 4.
- le circuit d'adressage 4 ayant adressé les données reçues de la transmission, adresse, de par le bus 5, vers le multiplexeur 6, les données à transmettre vers l'émetteur ;
- les circuits de couplage optique 54 assurent la liaison des données en série entre les multiplexeurs 6 et le processeur 3;
- le processus d'émission des données s'effectue alors de la même façon que dans l'émetteur.
Claims (9)
- Système professionnel de commutation et transmission bidirectionnelle à multiplexage au moins temporel pour des signaux haute-fidélité audio-analogiques et audionumériques et des signaux de commande et contrôle, tels que ceux produits et traités dans des studios d'enregistrement, des scènes et régies de radio, de télévision, ou de salles de concert, comprenant un premier support de transmission bidirectionnelle (21) pour convoyer des premières trames produites par multiplexage desdits signaux haute-fidélité et signaux de commande et contrôle entre un premier équipement d'extrémité de commutation temporelle et transmission de signaux, dit émetteur (E), et un second équipement d'extrémité de commutation temporelle et transmission de signaux, dit récepteur maítre (RM),
caractérisé en ce qu'il comprend également des moyens de commande à interface homme-machine (26, 32, 33, 34) recevant les signaux haute-fidélité transmis par des circuits d'entrée (10) inclus dans le premier équipement d'extrémité (E) et lesdits signaux de commande et contrôle pour surveiller en temps réel l'évolution de différents paramètres relatifs auxdits signaux et pour commander en temps réel des modifications et adaptations de configuration (17) dans ledit premier équipement d'extrémité (E) au moyen desdits signaux de commande et contrôle. - Système conforme à la revendication 1,
caractérisé en ce que lesdits moyens de commande à interface homme-machine comprennent des moyens (26a) de calcul de paramètre à mémorisation dynamique pour calculer pour chacun des signaux haute-fidélité des premières valeurs absolues respectives, des moyens pour mémoriser (26b) lesdites valeurs absolues, des moyens (26c) pour comparer respectivement lesdites premières valeurs absolues à des secondes valeurs absolues précédemment mémorisées, et des moyens (26d) pour détecter et mémoriser les valeurs absolues de plus grandes magnitudes parmi les valeurs absolues comparées. - Système conforme à la revendication 1 ou 2,
caractérisé en ce que lesdits moyens de commande à interface homme-machine comprennent des moyens de traitement informatique (32, 33, 34) reliés auxdits moyens de calcul de paramètre à mémorisation dynamique et à des moyens de commande d'adressage (31) inclus dans ledit second équipement pour traiter et visualiser en temps réel différents blocs d'information, de commande et routage, correspondant respectivement à des voies de transmission attribuées dans le système respectivement auxdits signaux haute-fidélité et pour commander en temps réel des modifications et adaptations de configuration dans au moins ledit premier équipement (E) d'extrémité au moyen desdits signaux de commande et contrôle et cela en fonction d'ordres donnés par un opérateur notamment au moyen d'un dispositif de pointage tel que souris (34). - Système conforme à l'une quelconque des revendications 1 à 3,
caractérisé en ce que lesdits équipements d'extrémité (E, RM, RE) comprennent des processeurs (3) et extracteurs (13) de type 2B3Q pour réaliser des opérations de concaténation et déconcaténation respectivement après multiplexage et avant démultiplexage des trames multiplexées, et en ce que la valeur zéro est affectée à une valeur initiale à fixer dans lesdits processeurs (3) et extracteurs (13). - Système conforme à l'une quelconque des revendications 1 ou 4,
caractérisé en ce qu'il comprend également une pluralité de seconds équipements annexes de commutation temporelle et de transmission de signaux, dits récepteurs esclaves (RE), et une pluralité de seconds supports de transmission (20), ladite pluralité de seconds équipements annexes (RE) étant reliée audit premier équipement (E) respectivement à travers ladite pluralité de seconds supports de transmission (20), et lesdits supports de transmission (20) convoyant unidirectionnellement des secondes trames multiplexées dans le sens du premier équipement (E) vers les seconds équipements annexes (RE). - Système conforme à la revendication 5,
caractérisé en ce que lesdits moyens de commande à interface homme-machine (26, 32, 33, 34) sont inclus dans ledit second équipement de commutation temporelle et transmission de signaux (RM), en ce que ledit second équipement (RM) est localisé dans une régie de mixage et lesdits seconds équipements annexes (RE) sont localisés dans des régies d'enregistrement ou de diffusion. - Système conforme à l'une quelconque des revendications 1 à 6,
caractérisé en ce que lesdits premier et second supports de transmission (20, 21) sont constitués par du câblage coaxial de type classique. - Système conforme à l'une quelconque des revendications 1 à 7,
caractérisé en ce que lesdits équipements d'extrémités (E, RM, RE) ont une architecture modulaire et comprennent différents modules standardisés (entrée, sortie, commande, alim) se logeant dans des baies. - Système selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comprend également des moyens tels qu'optocoupleurs (23, 14) placé à différents niveaux sur le parcours des signaux et trames pour garantir une isolation galvanique correcte entre lesdits équipements d'extrémités.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9312364A FR2711460B1 (fr) | 1993-10-18 | 1993-10-18 | Système de commutation et transmission bidirectionnelle à multiplexage temporel pour des signaux haute-fidélité audio-analogiques et audionumériques et des signaux de commande et de contrôle. |
FR9312364 | 1993-10-18 | ||
PCT/FR1994/001199 WO1995011553A1 (fr) | 1993-10-18 | 1994-10-17 | Systeme professionnel de commutation et transmission bidirectionnelle a multiplexage temporel pour des signaux haute-fidelite audio-analogiques et audionumeriques et des signaux de commande et de controle |
Publications (2)
Publication Number | Publication Date |
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EP0724793A1 EP0724793A1 (fr) | 1996-08-07 |
EP0724793B1 true EP0724793B1 (fr) | 1999-08-04 |
Family
ID=9451921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP94931072A Expired - Lifetime EP0724793B1 (fr) | 1993-10-18 | 1994-10-17 | Systeme professionnel de commutation et transmission bidirectionnelle a multiplexage temporel pour des signaux haute-fidelite audio-analogiques et audionumeriques et des signaux de commande et de controle |
Country Status (9)
Country | Link |
---|---|
US (1) | US5764917A (fr) |
EP (1) | EP0724793B1 (fr) |
AT (1) | ATE183040T1 (fr) |
DE (1) | DE69419931T2 (fr) |
DK (1) | DK0724793T3 (fr) |
ES (1) | ES2138093T3 (fr) |
FR (1) | FR2711460B1 (fr) |
GR (1) | GR3031773T3 (fr) |
WO (1) | WO1995011553A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US8675649B2 (en) | 2008-11-18 | 2014-03-18 | Yamaha Corporation | Audio network system and method of detecting topology in audio signal transmitting system |
EP2280488A1 (fr) * | 2009-06-30 | 2011-02-02 | STMicroelectronics S.r.l. | Appareil de transmission et réception pour signaux numériques |
DE102009028645B4 (de) * | 2009-08-19 | 2014-04-03 | Raumfeld Gmbh | Verfahren und Anordnung zur Synchronisation von Datenströmen in Netzwerken sowie ein entsprechendes Computerprogramm und ein entsprechendes computerlesbares Speichermedium |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US3795771A (en) * | 1970-05-15 | 1974-03-05 | Hughes Aircraft Co | Passenger entertainment/passenger service and self-test system |
FR2552958A1 (fr) * | 1983-10-03 | 1985-04-05 | Moulin Andre | Console numerique de traitements de signaux |
WO1987006404A1 (fr) * | 1986-04-11 | 1987-10-22 | Orion Research, Inc. | Systeme de melange audio et circuit de gain pour celui-ci |
DE3615981A1 (de) * | 1986-05-13 | 1987-11-19 | Gregor Berg | System zur parameterprogrammierbaren bearbeitung von audiosignalen in kombination mit programmierbarer schaltmatrix, zur anwendung im bereich der analogen und digitalen elektronischen aufbereitung von audiosignalen |
US4993073A (en) * | 1987-10-01 | 1991-02-12 | Sparkes Kevin J | Digital signal mixing apparatus |
US4922536A (en) * | 1988-11-14 | 1990-05-01 | Massachusetts Institute Of Technology | Digital audio transmission for use in studio, stage or field applications |
US5299266A (en) * | 1992-03-20 | 1994-03-29 | Sony Electronics Inc. | Multi machine monitor for TV post production |
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1993
- 1993-10-18 FR FR9312364A patent/FR2711460B1/fr not_active Expired - Fee Related
-
1994
- 1994-10-17 ES ES94931072T patent/ES2138093T3/es not_active Expired - Lifetime
- 1994-10-17 EP EP94931072A patent/EP0724793B1/fr not_active Expired - Lifetime
- 1994-10-17 US US08/624,599 patent/US5764917A/en not_active Expired - Lifetime
- 1994-10-17 AT AT94931072T patent/ATE183040T1/de not_active IP Right Cessation
- 1994-10-17 WO PCT/FR1994/001199 patent/WO1995011553A1/fr active IP Right Grant
- 1994-10-17 DE DE69419931T patent/DE69419931T2/de not_active Expired - Fee Related
- 1994-10-17 DK DK94931072T patent/DK0724793T3/da active
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1999
- 1999-11-05 GR GR990402864T patent/GR3031773T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
GR3031773T3 (en) | 2000-02-29 |
ES2138093T3 (es) | 2000-01-01 |
DE69419931D1 (de) | 1999-09-09 |
ATE183040T1 (de) | 1999-08-15 |
FR2711460B1 (fr) | 1996-02-02 |
EP0724793A1 (fr) | 1996-08-07 |
US5764917A (en) | 1998-06-09 |
WO1995011553A1 (fr) | 1995-04-27 |
DE69419931T2 (de) | 2000-05-04 |
FR2711460A1 (fr) | 1995-04-28 |
DK0724793T3 (da) | 2000-03-13 |
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