EP2854314B1 - Procédé et dispositif pour l'insertion de messages d'alarme dans un ensemble DAB dans un tunnel - Google Patents

Procédé et dispositif pour l'insertion de messages d'alarme dans un ensemble DAB dans un tunnel Download PDF

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EP2854314B1
EP2854314B1 EP14183426.7A EP14183426A EP2854314B1 EP 2854314 B1 EP2854314 B1 EP 2854314B1 EP 14183426 A EP14183426 A EP 14183426A EP 2854314 B1 EP2854314 B1 EP 2854314B1
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Prior art keywords
dab
audio
fic
ensemble
data
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German (de)
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EP2854314A1 (fr
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Sven Mulka
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H04H20/06—Arrangements for relaying broadcast information among broadcast stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/10—Arrangements for replacing or switching information during the broadcast or the distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]

Definitions

  • the invention relates to a method for exchanging content in a DAB ensemble to form local windows within a single-frequency network, which is particularly suitable for alarming in a tunnel.
  • the invention further relates to a device for this purpose.
  • DAB Digital Audio Broadcasting, ETSI EN 300 401 V1.4.1 (2006-06)
  • FIC Fast Information Channel
  • CU Capacity Unit
  • FIB Fast Information Block
  • guard interval is a protective distance between two successive DAB symbols and is approximately 246 ⁇ s in transmission mode I, approximately 62 ⁇ s in mode II, approximately 31 ⁇ s in mode III and approximately 123us in mode IV.
  • ETI Ensemble Transport Interface
  • the local ETI data stream thus formed is distributed to the DAB transmitters in the local area and the global ETI data stream to the DAB transmitters in the global area. Since the localization of the content requires a non-negligible processing time, the transmission of the global ensemble must be delayed by this processing time. This can be done by an explicit delay element or distributed over all DAB transmitters using the time stamp technique. This process is widely used in engineering.
  • the schematic structure of a DAB single-frequency network with a local window is described with reference to FIG Fig. 1 explained in more detail.
  • the so-called ensemble multiplexer (101) combines the audio and data services to be broadcast together within an ensemble to form an ensemble in the form of the ensemble transport interface (ETI) defined in European Telecommunication Standard ETSI ETS 300 799 ed.1 (1997-09).
  • ETSI ensemble transport interface
  • This frame-oriented data stream is distributed to the DAB transmitters (103) via the ETI distribution network (102).
  • the incoming ETI frames are in the DAB transmitter in a manner not shown via a dynamic or static Delay element adapted to the time requirements for synchronicity in the DAB single-frequency network, converted into DAB frames by a COFDM modulator and broadcast as a global ensemble (105) via a mixer with the following output stage at the desired frequency.
  • the global ensemble is also passed as an ETI data stream to a local multiplexer (108). This replaces individual sub-channels and FIBs with local content (109).
  • the ETI data stream localized in this way is distributed via the local ETI distribution network (110) to one or more local DAB transmitters (111) and is broadcast by them as a local ensemble (106) on the same frequency as that of the global ensemble.
  • Fig. 2 shows the schematic structure of a DAB repeater with intercom for supplying a tunnel with DAB signals according to the prior art.
  • a global DAB signal is received outside the tunnel by means of a directional antenna (201) and passed via a distributor (202) to a frequency-selective amplifier (203) and to a DAB reception module (207).
  • the amplifier (203) filters the global DAB signal and amplifies it to a predefined level using automatic gain control and outputs it as a regenerated DAB signal (204).
  • the DAB reception module (207) demodulates the supplied global DAB signal and outputs the decoded FIC (209). In addition, it generates a synchronization signal (208), which is not shown in more detail, and which is used in the local multiplexer (210) and in the DAB low-power transmitter (212) for the time synchronization of the frames generated in each case.
  • the FIC (209) is used by the local multiplexer (210) to reconstruct the sub-channel configuration of the global DAB signal.
  • the sub-channel configuration defines the identifier, data rate, start address, error protection and content type for each sub-channel.
  • the audio encoders (216) are configured for each sub-channel with regard to data rate and audio standard (DAB-Musicam, DAB-Plus or DMB) by the local multiplexer.
  • the alarm message (214) is distributed via a distributor (215) to the audio encoders (theoretically up to 64, practically approx. 20 audio encoders) and is compressed by them to the data rate set in each case.
  • the local multiplexer forms a local ensemble which has the same logical structure as that of the global DAB signal.
  • the local ensemble is transferred to the DAB micro-power transmitter (212) as an ETI data stream (211).
  • the incoming ETI frames are adapted in the DAB micro-power transmitter (212) in a manner not shown to the time requirements for synchronicity in the DAB single-frequency network, converted into DAB frames by a COFDM modulator and via a Mixing stage with the following output stage at the desired frequency output as a DAB signal (213).
  • a switch (205) can be used to switch from the regenerated global DAB signal (204) to the local DAB signal (213).
  • the respectively selected DAB signal is possibly further amplified and radiated into the area of the tunnel via one or more antennas (206).
  • a DAB receiver located in the tunnel can therefore receive either the global DAB signal or the local DAB signal with alarm messages, depending on the danger situation.
  • the use of a local multiplexer additionally requires the supply of the global ensemble to it. However, this additional effort is very impractical for small and medium-sized local windows, and it also results in permanent operating and rental costs for the line feed.
  • EP 2 461 610 discloses a method for broadcasting emergency information that is only relevant for a specific region. There is a first, general broadcast mode for digital radio signals and a second broadcast mode for emergency information, both of which are transmitted as an ETI data stream. If emergency information is available, the second mode is automatically selected by means of a switch and the emergency information is transmitted via an HF transmitter.
  • the emergency information is encoded in the method and converted to a predetermined bit rate that is smaller than the smallest bit rate of the broadcast signals of the first mode.
  • Fill bits are also inserted into the emergency information data stream, which compensate for the difference between the predetermined bit rate and the bit rates of the digital broadcast signals.
  • EP 2 328 287 reveals similar EP 2 461 610 a procedure for broadcasting emergency information that is only relevant for a specific region.
  • the method also aims to outshine several regular radio signals using the same emergency information.
  • the emergency information is encoded in the method and converted to a predetermined bit rate that is smaller than the smallest bit rate of the regular radio signals received by means of the HF receiver.
  • filler data are inserted into the emergency information data stream, which compensate for the difference between the predetermined bit rate and the bit rates of the regular broadcast signals.
  • EP 0 944 194 discloses a method for a DAB receiver.
  • the DAB signal to be received is amplified by means of analog signal processing, filtered and mixed down to a low intermediate frequency.
  • the pre-processed DAB signal is digitized as IQ data using an analog / digital converter.
  • the digital demodulation of the DAB baseband takes place in a second circuit part.
  • the original components of a DAB ensemble (FIC and sub-channel) are available as a bit stream.
  • a sub-channel selected by the user is converted into PCM data using MPEG audio decoders, which are then transferred to a loudspeaker or headphones for audibility via a digital / analog converter with the following amplifier.
  • the zero symbol contained in the DAB signal is used to determine the start of a DAB frame.
  • the PRS symbol following the zero symbol serves as a reference symbol for differential phase demodulation.
  • correction parameters for the deviation in the frequency position and in the time domain can be determined. The correction parameters can then be used to readjust the oscillators contained in the analog circuit part or to improve the frame synchronization.
  • DE 197 44 420 discloses a method for localizing DAB content that relies on the delivery of the global ensemble waived as an ETI data stream and instead used a modified COFDM modulator in the DAB transmitter, which is synchronized to the global DAB signal with respect to the DAB frame and only transmits the CUs of the content to be exchanged. No RF signal is transmitted at the locations of the CUs that are not to be changed.
  • a DAB receiver accordingly receives both localized and non-localized content in the area of the transmission of the local transmitter.
  • WO 2006/035242 discloses a method similar DE 197 44 420 , which also does not feed the global ensemble as an ETI data stream and instead uses a frequency-selective amplifier with automatic gain control and a DAB receiver.
  • the frequency-selective amplifier is used to process and feed the global DAB signal into the local area of the local window. This method is generally used in technology and is known under the term repeater.
  • the DAB receiver receives the global DAB signal and derives configuration and synchronization information for it the local multiplexer.
  • the local multiplexer creates an alternative ensemble in which the original sub-channel contents are replaced, for example, by alarm messages, with a separate audio encoder being used for each audio sub-channel.
  • the local ensemble generated in this way is temporarily broadcast in the area of the local window, for example of a car tunnel, during an emergency situation as an alternative to the global ensemble.
  • the object of the invention is to eliminate the disadvantages of the prior art.
  • an improved method for localizing content in a DAB single-frequency network is specified, which is suitable for signaling alarm information in a tunnel or local windows.
  • the proposed method makes it possible to reduce the number of audio encoders to one per audio standard.
  • the alarm message is first compressed to the lowest audio data rate within the DAB ensemble for each audio standard used. Only when you key into the sub-channel the already compressed audio data stream is adapted to the respective data rate of the sub-channel by simply inserting filler data.
  • the invention is based on the consideration that the audio subchannels to be replaced have different data rates, but the same audio message is to be transmitted.
  • the quality of the audio message is of secondary importance for the alarm application purpose, so that even low data rates, ie high compressions of the audio data stream with reduced audio quality, are permissible.
  • the digital receive branch and the digital transmit branch are shared for the global DAB signal and the local DAB signal.
  • the method according to the invention can be used in DAB single-wave networks both to supply a tunnel Alarm messages as well as a local window can be applied. In addition to feeding alarm messages, the process can also be used to feed general local information.
  • the specified method has the advantage over the previously known solutions that only one audio encoder is required for compression of the alarm messages per audio standard and the otherwise conventional analog frequency-selective amplifier is replaced by digital modules.
  • Fig. 3 schematically shows an embodiment of the inventive method for exchanging content in a DAB ensemble for alarming in a tunnel.
  • a global DAB signal is received outside the tunnel by means of a directional antenna (301) and via a digital IQ demodulator (302) amplified, filtered and digitized, the result is the DAB baseband prepared in this way in the form of digital IQ data (303).
  • the transmission mode (305) is determined from the digital IQ data (303) by assessing the zero symbol length using a transmission mode detector (304).
  • the start of the zero symbol and thus the start of the DAB frames in the digital IQ data (303) is determined by a zero symbol detector (306).
  • the start of the zero symbol is marked by a pulse (307).
  • the pulse (307) is delayed via a delay element (331) and output as a start pulse (332) such that the start pulse (332) falls on the beginning of the next zero symbol.
  • the duration of the delay depends on the transmission mode and is 96ms in Mode I, 24ms in Mode II, 24ms in Mode III and 48ms in Mode IV.
  • Deviations in the sampling rate or frequency deviations (309) are determined by analyzing (308) the phase reference symbol within the digital IQ data (303), for example by autocorrelation or correlation with the known sequence for the phase reference symbol.
  • An oscillator (338) provides the system clocks (339 and 340) for the digital IQ demodulator (302) and the digital IQ modulator (336). If the frequency deviates, the oscillator is adjusted accordingly via the control value (309).
  • a FIC demodulator (310) performs the demodulation for the FIC symbols in the digital IQ data (303).
  • the FIC demodulated in this way contains basic configuration information about the DAB ensemble. Due to the system, the FIC is delayed compared to the DAB signal (301) and must be corrected accordingly.
  • the CIF count contained in FIG. 0/0 is increased by the value of N by means of the first FIC processing unit (311) and the reconfiguration possibly signaled in the FIC is shortened by N CIF frames by the second FIC processing unit (312) ,
  • the value for N is preferably chosen so that N * 24ms is greater than or equal to the total delay time of the FIC.
  • the third FIC processing unit (313) extracts the ensemble configuration (MCI) from the FIC and stores it in the MCI database (320). All audio data rates (321) and the audio standards used are determined from the data collected therein. Furthermore, a list with configuration data of the audio sub-channel (322) and a list with configuration data of the data sub-channel (323) are created. A generator (328) delivers appropriate filler data (329) for each data sub-channel in accordance with the configuration (323).
  • the alarm message (315) is routed via a distributor (316) to the audio encoders (317, 318, 319), only one encoder being available for each audio standard.
  • Each audio encoder (317, 318, 319) compresses the alarm message to the lowest data rate available in the ensemble or an even lower data rate.
  • the alarm messages compressed in this way are propagated in the first audio processing unit (324) and adapted to the respective data rate in accordance with the configuration (321) by inserting filler data.
  • the second audio processing unit (326) selects the appropriate alarm message with the appropriate data rate and the appropriate audio standard in accordance with the configuration (322) for each audio sub-channel.
  • the fourth FIC processing unit (314) replaces the text information contained in the FIC FIG 1/0, FIG 1/1, FIG 1 / 3 .
  • FIG 1/4, FIG 1/5 and FIG 1/6 by means of suitable textual information and passes the modified FIC (330) to the COFDM modulator (333).
  • the COFDM modulator (333) combines the FIC (330), the data subchannel (329) and the audio subchannel (327) and carries out the baseband modulation, using the control value frequency correction (309) and the transmission mode is observed.
  • the baseband modulated in this way is output as a stream of digital IQ data (334), the output of the zero symbol contained only beginning with the start pulse (332).
  • the digital IQ data (303) of the global DAB signal or the IQ data (334) of the local DAB signal are selected via the changeover switch (335), a changeover during the zero symbol avoiding interference.
  • the digital IQ data stream selected by the changeover switch (335) is digitally filtered by the digital IQ modulator (336), mixed to the frequency of the DAB single-frequency network and analog output.
  • the analog DAB signal (337) generated in this way is possibly further amplified and radiated into the area of the tunnel via one or more antennas.
  • a DAB receiver located in the tunnel can therefore receive either the global DAB signal or the local DAB signal with alarm messages, depending on the danger situation.
  • FIG. 3 An embodiment of the device according to the invention is shown in Fig. 3 identified by reference numerals (300).

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  • Circuits Of Receivers In General (AREA)

Claims (8)

  1. Procédé pour l'affichage de messages d'alarme au sein d'un réseau DAB à fréquence unique, des signaux DAB globaux étant transmis sous la forme d'un ensemble DAB dans le réseau DAB à fréquence unique et un émetteur fonctionnant dans le réseau DAB à fréquence unique remplaçant les signaux DAB globaux en synchronisme avec le réseau DAB à fréquence unique avec un signal DAB local dont la configuration est dérivée du FIC du signal DAB global,
    contenant les étapes
    (a) distribution (316) du message d'alarme à afficher (315) sur des encodeurs audio (317, 318, 319), comprenant chacun exactement l'une des normes audio contenues dans l'ensemble DAB global;
    (b) compression du message d'alarme distribué à l'aide des encodeurs audio (317, 318, 319) sur un débit de données inférieur ou égal au débit de données audio le plus bas dans l'ensemble DAB global;
    (c) reformatage (324) des messages d'alarme comprimés dans l'étape (b) sur tous les débits de données audio (321) survenant dans l'ensemble DAB global;
    (d) sélection (326) d'un message d'alarme reformaté (325) de l'étape (c) par sous-canal audio, chacun ayant le même débit de données et le même standard audio que le sous-canal audio respectif de l'ensemble DAB global; et
    (e) affichage des messages d'alarme sélectionnés dans l'étape (d) (327) dans les sous-canaux audio correspondants de l'ensemble DAB local, comprenant les étapes partielles
    (i) réception d'un ensemble DAB global (301) et démodulation (310) du FIC contenu;
    (ii) ajustement (311) du FIG 0/0 contenu dans le FIC de l'étape partielle (i), par l'augmentation du camp CIF-Count d'un nombre N, N étant sélectionné de telle sorte que N*24ms est supérieur ou égal à la durée de traitement totale pour le FIC;
    (iii) réduction (312) d'une reconfiguration signalisée dans le FIC de l'étape partielle (ii) d'un cadre CIF N, N correspondant à la valeur de l'étape partielle (ii); et
    (iv) affichage du FIC obtenu dans l'étape partielle (iii) dans l'ensemble DAB local.
  2. Procédé selon la revendication 1, l'affichage de l'étape (e) comprenant les étapes partielles
    (e1) réception d'un signal DAB global (301), la filtration, la démodulation et la conversion en données IQ numériques (303) à l'aide d'un démodulateur IQ numérique (302), les données IQ numérique représentant le signal de bande de base DAB;
    (e2) détermination du mode de transmission (305) au moyen du détecteur de mode de transmission (304), par l'évaluation de la longueur du symbole zéro à l'intérieur des données numériques IQ (303) de l'étape partielle (e1);
    (e3) génération d'une impulsion (307) au moyen du détecteur de symbole zéro (306), qui marque le début du symbole du zéro à l'intérieur des données IQ numériques (303) de l'étape partielle (e1);
    (e4) analyse (308) du symbole de référence de phase à l'intérieur des données IQ numériques (303) de l'étape partielle (e1) et déduction d'une valeur de réglage (309) pour la correction de la fréquence;
    (e5) démodulation (310) du FIC à l'intérieur des données IQ numériques (303) de l'étape partielle (e1);
    (e6) ajustement (311) du FIG 0/0 contenu dans le FIC de l'étape partielle (e5), par l'augmentation du camp CIF-Count d'un nombre N, N étant sélectionné de telle sorte que N*24ms est supérieur ou égal à la durée de traitement totale pour le FIC;
    (e7) réduction (312) d'une reconfiguration signalisée dans le FIC de l'étape partielle (e6) d'un cadre CIF N, N correspondant à la valeur de l'étape partielle (e6);
    (e8) extraction (313) de la configuration de l'ensemble (MCI) du FIC de l'étape partielle (e7) et insertion de celle-ci dans la banque de données MCI (320);
    (e9) détermination des débits de données audio dans l'ensemble DAB (321) et des normes audio par l'évaluation de la banque de données MCI (320) de l'étape partielle (e8);
    (e10) détermination de la configuration (322) des sous-canaux audio contenu dans l'ensemble DAB par l'évaluation de la banque de données MCI (320) de l'étape partielle (e8);
    (e11) détermination de la configuration (323) des sous-canaux de données contenu dans l'ensemble DAB par l'évaluation de la banque de données MCI (320) de l'étape partielle (e8); et
    (e12) génération (328) des données de remplissage (329) pour tous les sous-canaux de données contenus dans l'ensemble DAB, conformément à la configuration de l'étape partielle (e11).
  3. Procédé selon la revendication 2, caractérisé en ce qu'il contient également l'étape
    (e13) échange (314) d'informations textes des FIG 1/0, FIG 1/1, FIG 1/3, FIG 1/4, FIG 1/5 et FIG 1/6 contenus dans le FIC de l'étape partielle (e7).
  4. Procédé selon la revendication 2 ou revendication 3, caractérisé en ce qu'il contient également les étapes
    (e14) retardement de l'impulsion (307) de l'étape partielle (e3) par un circuit de retard (331) de telle sorte que l'impulsion de démarrage (332) émise arrive précisément au début du symbole zéro suivant;
    (e15) formation du signal de bande de base DAB (334) sous forme de données numériques IQ au moyen d'un modulateur COFDM (333), par regroupement et modulation du FIC (330) obtenu dans l'étape partielle (e7) ou (e13), les contenus des sous-canaux de données (329) générés dans l'étape partielle (e12) et le contenu des sous-canaux audio formés dans l'étape (d), le modulateur COFDM (333) tenant compte du mode de transmission de grandeurs de réglage (305) et la correction de fréquence (309) et émettant le symbole zéro du signal de bande de base DAB (334) uniquement avec l'impulsion de démarrage (332) de l'étape partielle (e14);
    (e16) commutation entre les données IQ numériques (303) de l'étape partielle (e1) et les données IQ numériques (334) de l'étape partielle (e15) au moyen du commutateur (335) en fonction de la situation dangereuse;
    (e17) filtrage numérique du flux de donnés IQ sélectionné dans l'étape partielle (e16) avec modulation sur la fréquence du réseau DAB à fréquence unique au moyen d'un modulateur IQ numérique (336);
    (e18) formation de signaux d'horloge (339, 340) pour le démodulateur IQ numérique (302) et le modulateur IQ numérique (336) au moyen d'un oscillateur (338) et correction des écarts de fréquence par le biais de la valeur de réglage (309) de l'étape partielle (e4); et
    (e19) diffusion du signal DAB (337) généré dans l'étape partielle (e17) dans une zone locale limitée.
  5. Procédé selon la revendication 4, caractérisé en ce que la commutation de l'étape (e16) a lieu au sein du symbole zéro.
  6. Procédé selon la revendication 4 ou la revendication 5, caractérisé en ce que la diffusion de l'étape (e19) a lieu dans la zone d'un tunnel.
  7. Procédé selon l'une des revendications ci-dessus, caractérisé en ce que les normes audio de l'étape (a) sont sélectionnées dans un groupe comprenant des normes audio selon ETSI EN 300 401 (Musicam), ETSI TS 102 563 (DAB-Plus) et ETSI TS 102 428 (DMB).
  8. Appareil pour l'affichage de messages d'alarme au sein d'un réseau DAB à fréquence unique, des signaux DAB globaux étant transmis sous la forme d'un ensemble DAB dans le réseau DAB à fréquence unique et étant remplacés en synchronisme avec le réseau DAB à fréquence unique avec un signal DAB local dont la configuration est dérivée du FIC du signal DAB global,
    comprenant
    (A) un équipement pour la distribution (316) du message d'alarme à afficher (315);
    (B) un encodeur audio précis (317, 318, 319) pour chaque norme audio se produisant dans l'ensemble DAB global, lesdits encodeurs audio comprimant le message d'alarme de (A) à un débit de données inférieur ou égal au plus petit débit de données audio se produisant dans l'ensemble DAB global;
    (C) une unité de traitement (324) pour le reformatage des messages d'alarme comprimés de (B) à chaque débit de données audio se produisant dans l'ensemble DAB global par l'insertion de données de remplissage;
    (D) une unité de traitement pour la sélection (326) d'un message d'alarme reformaté (325) de (C) par sous-canal audio, chacun ayant le même débit de données et le même standard audio que le sous-canal audio respectif de l'ensemble DAB global; et
    (E) une unité de traitement pour l'affichage (333) des messages d'alarme (327) sélectionnés dans l'étape (D) sur les sous-canaux audio respectifs de l'ensemble DAB local, y compris
    (i) la réception d'un ensemble DAB global (301) et la démodulation (310) du FIC contenu;
    (ii) l'ajustement (311) du FIG 0/0 contenu dans le FIC de l'étape partielle (i), par l'augmentation du camp CIF-Count d'un nombre N, N étant sélectionné de telle sorte que N*24ms est supérieur ou égal à la durée de traitement totale pour le FIC;
    (iii) réduction (312) d'une reconfiguration signalisée dans le FIC de l'étape partielle (ii) d'un cadre CIF N, N correspondant à la valeur de l'étape partielle (ii); et
    (iv) affichage du FIC obtenu dans l'étape partielle (iii) dans l'ensemble DAB local.
EP14183426.7A 2013-09-06 2014-09-03 Procédé et dispositif pour l'insertion de messages d'alarme dans un ensemble DAB dans un tunnel Active EP2854314B1 (fr)

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EP19207035.7A EP3627729A1 (fr) 2013-09-06 2014-09-03 Procédé et dispositif d'affichage des messages d'alarme dans un ensemble dab à l'intérieur d'un tunnel

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DE102013109795.2A DE102013109795B4 (de) 2013-09-06 2013-09-06 Verfahren und Vorrichtung zum Einblenden von Alarmmeldungen in einem DAB-Ensemble innerhalb eines Tunnels

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EP19207035.7A Division-Into EP3627729A1 (fr) 2013-09-06 2014-09-03 Procédé et dispositif d'affichage des messages d'alarme dans un ensemble dab à l'intérieur d'un tunnel
EP19207035.7A Division EP3627729A1 (fr) 2013-09-06 2014-09-03 Procédé et dispositif d'affichage des messages d'alarme dans un ensemble dab à l'intérieur d'un tunnel

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EP2854314A1 EP2854314A1 (fr) 2015-04-01
EP2854314B1 true EP2854314B1 (fr) 2020-01-22

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EP14183426.7A Active EP2854314B1 (fr) 2013-09-06 2014-09-03 Procédé et dispositif pour l'insertion de messages d'alarme dans un ensemble DAB dans un tunnel
EP19207035.7A Pending EP3627729A1 (fr) 2013-09-06 2014-09-03 Procédé et dispositif d'affichage des messages d'alarme dans un ensemble dab à l'intérieur d'un tunnel

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ITUB20160912A1 (it) * 2016-02-23 2017-08-23 Trx Innovate S R L Sistema di distribuzione di segnali radio

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DE19744420A1 (de) 1997-10-08 1999-04-15 Techno Trend Systemtechnik Gmb Verfahren zur Aussendung von Informationen innerhalb eines Gleichwellennetzes
JP3514624B2 (ja) * 1998-03-18 2004-03-31 株式会社ケンウッド ディジタル放送受信機
WO2006035242A2 (fr) 2004-09-30 2006-04-06 Radioscape Limited Systeme de transmission de messages d'urgence et procede associe
EP2328287A3 (fr) * 2009-11-30 2014-05-14 Electronics and Telecommunications Research Institute Relais de diffusion d'un signal de service d'urgence
KR20120062549A (ko) * 2010-12-06 2012-06-14 한국전자통신연구원 자동 채널변환을 이용한 재난 정보의 방송 장치 및 방법

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Publication number Publication date
DE102013109795A1 (de) 2015-03-12
DK2854314T3 (da) 2020-04-27
EP2854314A1 (fr) 2015-04-01
DE102013109795B4 (de) 2017-01-26
ES2784178T3 (es) 2020-09-22
EP3627729A1 (fr) 2020-03-25

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