EP2357746A1 - Appareil et procédé de transmission de contenu de service et appareil de diffusion d'urgence - Google Patents

Appareil et procédé de transmission de contenu de service et appareil de diffusion d'urgence Download PDF

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Publication number
EP2357746A1
EP2357746A1 EP10195172A EP10195172A EP2357746A1 EP 2357746 A1 EP2357746 A1 EP 2357746A1 EP 10195172 A EP10195172 A EP 10195172A EP 10195172 A EP10195172 A EP 10195172A EP 2357746 A1 EP2357746 A1 EP 2357746A1
Authority
EP
European Patent Office
Prior art keywords
contents
providing unit
contents providing
signals
service
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.)
Withdrawn
Application number
EP10195172A
Other languages
German (de)
English (en)
Inventor
Geon Kim
So Ra Park
Yong Hoon Lee
Yong Tae Lee
Jin Min Kim
Myung Sun Baek
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.)
Electronics and Telecommunications Research Institute ETRI
Original Assignee
Electronics and Telecommunications Research Institute ETRI
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
Priority claimed from KR1020090127734A external-priority patent/KR20110071228A/ko
Priority claimed from KR1020090127733A external-priority patent/KR101341045B1/ko
Application filed by Electronics and Telecommunications Research Institute ETRI filed Critical Electronics and Telecommunications Research Institute ETRI
Priority to EP12157064A priority Critical patent/EP2461500A3/fr
Publication of EP2357746A1 publication Critical patent/EP2357746A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • H04H20/103—Transmitter-side switching
    • 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 present invention relates to a apparatus and method for transmitting service contents and emergency broadcasting apparatus, and more particularly, to a method and apparatus enabling a receiver to receive switching signals without performing additional operations, and an apparatus for performing emergency broadcasting to broadcasting specifications in emergency situations.
  • the receiving side cannot receive the switching signals until the additional operation is performed.
  • the receiving side cannot receive the switched signals until it performs the additional operations, such as synchronization.
  • the receiving antenna of the repeater may be mainly positioned near the ground or in downtown, not in a high mountain. In this case, deterioration in quality of the repeating signals occurs in the tunnel or underground due to the multi-path signals received in the receiving antenna.
  • An exemplary embodiment of the present invention provides a method for transmitting service contents by switching connection between at least two contents providing units and a transmitter, comprising: connecting the transmitter connected to any one contents providing unit to another contents providing unit when switching signals are generated; and transmitting service contents transmitted from another contents providing unit
  • Another exemplary embodiment of the present invention provides an apparatus for transmitting service contents, including: at least two contents providing unit: a transmitter that transmits service contents output from each contents providing unit; and a switching unit that switches a connection between each contents providing unit and the transmitter, wherein the switching unit connects the transmitter connected to any one contents providing unit to another contents providing unit when switching signals are generated.; and outputs service contents transmitted from another contents providing unit to the transmitter.
  • Still another exemplary embodiment of the present invention provides an emergency broadcasting apparatus, including: a co-channel repeater that removes multi-path signals or a Doppler effect due to vehicles in downtown from received broadcasting signals; and an emergency broadcasting unit performing at least one of decoding, multiplexing, and modulating input audio, video, and data emergency broadcasting signals according to a broadcasting standard.
  • FIG. 1 is a conceptual diagram of a transmitter according to an exemplary embodiment of the present invention
  • FIGS. 2 and 3 are block diagrams of the transmitter according to an exemplary embodiment of the present invention.
  • FIG. 4 is an exemplified diagram explaining in detail the transmitter of FIG. 3 ;
  • FIGS. 5 to 7 are flowcharts explaining a connection switching method between two contents providing units.
  • FIG. 8 is a bock diagram for explaining the emergency broadcasting apparatus according to another exemplary embodiment of the present invention.
  • FIG. 1 is a conceptual diagram of a transmitting apparatus according to an exemplary embodiment of the present invention
  • FIGS. 2 and 3 are block diagrams of a transmitting apparatus according to an exemplary embodiment of the present invention.
  • the transmitting apparatus is configured to include at least two contents providing units 100, a switching unit 200 that is connected to the contents providing unit 100, and a transmitter 300.
  • At least two contents providing units 100 transmit signals to the switching unit 200,
  • the switching unit 200 switches the connection between each of the contents providing units 100.
  • the switching unit 200 is connected to an A contents providing unit 100a to receive signals and switches the connection to the B contents providing unit 100b at a specific timing to receive signals therefrom and then, output them to the transmitter 300.
  • the transmitter 300 transmits the signals.
  • FIGS. 2 and 3 describes, by way of example, the case where two contents providing units transmitting signals are used for convenience of explanation, but the number of contents providing units is not limited thereto.
  • the transmitting apparatus to enable the receiving side to receive the switching signals without performing separate operations include two contents providing units 400a and 400b, a switching unit 500a, a modem, and a transmitter 600.
  • the two contents providing units 400a and 400b transmit service contents to the switching unit 500.
  • each contents providing unit 400a and 400b When each contents providing unit 400a and 400b provides a plurality of service contents, they each include multiplexers 410 and 400b. In this configuration, the multiplexers 410a and 410b multiplex two or more service contents and transmit them to the switching unit 500.
  • the switching unit 500 switches the connection between each of the contents providing units 400a and 400b.
  • the switching unit 500 connects an A contents providing unit 400a to a modem and a transmitter 600 to transmit the service contents of the A contents providing unit 400a and then switches the connection with the A contents providing unit 400a to the B contents providing unit 400b at a specific timing to output the service contents from the B contents providing unit 400b to the modem and the transmitter 600.
  • the A contents providing unit 400a transmits service configuration information to the B contents providing unit 400b and the B contents providing unit 400b configures the service contents based on the service configuration information transmitted from the A contents providing unit 400a.
  • the switching unit 500 receives the service contents from the connected A contents providing unit 400a and when the switching signal is generated, switches the connection with the A contents providing unit 400a to the B contents providing unit 400b at a specific tinting and receives the service contents therefrom and then outputs them to the modem and the transmitter 600.
  • the modem and transmitter 600 includes a modem 610 and a transmitter 620 and the modem 610 modulates the service contents output from the switching unit 500 according to the transmission standard and the transmitter 620 transmits the modulated service contents.
  • the transmitting method performs the switching operation during the process of configuring the signals and then, performs the modulation according to the transmission standard at the transmitting end.
  • the transmission standard of the signals for all the contents is the same. Therefore, the above-mentioned method may be used when building a system enabling one transmitting end to transmit specific services to all receivers for a predetermined time or continuously.
  • two contents providing units 700a and 700b, a switching unit 800, and a transmitter 900 are included.
  • the two contents providing units 700a and 700b transmit service contents to the switching unit 800.
  • Each contents providing unit 700a and 700b includes multiplexers 710a and 710b and modem units 720a and 720b.
  • Each multiplexer 710a and 710b multiplex two or more service contents and transmits them to modem units 720a and 720b therein when the service contents are two or more.
  • the modem units 720a and 720b modulate the multiplexed services according to at least one of the transmission standard and the transmission information and transmits them to the switching unit 800.
  • the switching unit 800 switches the connection between each contents providing unit 700a and 700b. For example, the switching unit 800 connects the A contents providing unit 700a to a transmitter 900 to transmit the modulated service contents and switches the connection with the transmitter 900 to the B contents providing unit 700b at a specific timing and receives the multiplexed service contents therefrom and outputs them to the transmitter 900.
  • the A contents providing unit 700a providing the current service contents transmits the service configuration information, the transmission standard, and the transmission information to the B contents providing unit 700b and the B contents providing unit 700b configures the service contents based on the service configuration information transmitted from the A contents providing unit 700a and multiplexes and modulates the service contents based on the transmission standard and the transmission information.
  • the switching unit 800 receives the modulated service contents from the connected A contents providing unit 700a and when the switching signal is generated, switches the connection with A contents providing unit 700a to the B contents providing unit 700b and receives the modulated service contents thereform and then outputs them to the transmitter 900
  • the transmitter 900 transmits the modulated service output from the switching unit 800.
  • the transmitting method capable of receiving the switched signals at the receiving side without performing the separate operations is switched after the modulation.
  • the two contents providing units 700a and 700b matches the transmission structure such as the frame synchronization or the symbol synchronization, etc., and when the switching signal is generated, the switchig unit 800 receives the modulated service contents at a specific timing and transmits them through the transmitter 900.
  • the method according to the exemplary embodiment can be applied when it is difficult for the contents providing system to connect to baseband signals but can serve different services to receivers for a predetermined time or continuously.
  • the transmitting apparatus includes a repeater 10 and an emergency signal generator 20,
  • the repeater 10 is used to retransmit received signals in an area where signals are weak at normal times and when the emergency situations occur, switches the transmission to the emergency signal generator 20 according to the emergency situation information and transmits emergency situation information.
  • the emergency signal generator 20 receives the existing signal, that is, the repeating signals to read the configuration information of the repeating signals and generate emergency situation information according to the configuration information,
  • the emergency signal generator 20 has the same signal configuration as the repeater 10 and has the same transmission standard as the repeater.
  • the signals transmitted from the repeater 10 are configured and transmitted according to the transmission standard at normal times.
  • the emergency signal generator 20 should have the same transmission standard as the repeater 10 to enable the receiving side to receive the signals without performing separate operations.
  • the transmitting device matches the following standards, etc., to enable the receiving side to receive the signals without performing separate operations.
  • the transmitting device When the transmitting device is included in a DAB-based system, it matches the start position of a null and when it is a DVB-T, it matches transmission parameter (TPS) signaling positions, etc.)
  • TPS transmission parameter
  • the emergency signal generator 20 may receive the information on the start timings of the frame synchronization or the symbol synchronization, etc., from the repeater 10.
  • the emergency signal generator 20 may synchronize the frames or the symbols at the switching timing by the following method.
  • the modulator 21 adjusts the timing outputting the emergency situation information according to the start timing of the repeater 10 by using the multiplexed signals received from an MUX/ReMUX 22.
  • MUX/ReMUX 22 When the MUX/ReMUX 22 generates data for modulation, data received from a service encoder 23 generate the multiplexed signals according to the modulating timing.
  • FIGS. 5 to 7 describe the connection switching method between two contents providing units with reference to the device of FIG. 3 but the number of contents providing units is not limited thereto.
  • FIGS. 5 to 7 are flow charts for explaining the connection switching method between two contents providing unit.
  • the switching method shown in FIG. 5 is a method for switching a system as soon as the switching signals are generated.
  • the switching method is advantageous in immediately switching the signals without the time delay.
  • the switching unit 800 connects to any one of the two contents providing units, for example, the A contents providing unit 700a to the transmitter 900(S510).
  • the connection between the .A contents providing unit 700 and the transmitter 900 is maintained.
  • the transmitter 900 connected to the B contents providing unit 700b is again connected to the A contents providing unit 700a (S510).
  • the transmitting side can transmit the signals by switching the connection without delay, but the receiving side delay as if services are temporarily stopped may occur in the receiving side receiving the signals.
  • FIG. 6 A method for searching and switching synchronization signal interval as a switching method for the synchronization signal interval in the DAB-based system will now be described with reference to FIG, 6 .
  • the exemplary embodiment shown in FIG. 6 may be applied to a switching method for a protective interval in the OFDM system.
  • the switching unit 800 connects any one of the two contents providing units, for example, the A contents providing unit 700a to the transmitter 900.
  • the transmitter should have the information on the synchronization signal interval in order to detect the position of the synchronization signal.
  • the position of the synchronization signal is continuously detected until the position of the synchronization signal is detected.
  • the transmitter 900 connected to the A contents providing unit 700a is connected to the B contents providing unit 700b (S640)
  • the transmitter 900 connected to the B contents providing unit 700b is again connected to the A contents providing unit 700a.
  • the transmitter 900 connected to the A contents providing unit 700a may be connected to the B contents providing unit 700b for the protective interval.
  • the switching unit 800 connects any one of the two contents providing units, for example, the A contents providing unit 700a to the transmitter 900 (S710).
  • the connection between the A contents providing unit 700a and the transmitter 900 is maintained.
  • the connection is switched when the switching signals are generated and it is determined whether the generation of the multiplexing signal is completed (5730). For example, it is determined whether the multiplexing for the encoded signals is completed.
  • the position of the synchronization signal is continuously detected until the position of the synchronization signal is detected.
  • the transmitter 900 connected to the A contents providing unit 700a is connected to the B contents providing unit 700b (S750).
  • the transmitter 900 connected to the B contents providing unit 700b is again connected to the A contents providing unit 700a.
  • step S740 may be omitted.
  • the transmitting method and the transmitting apparatus of the present invention connects any one of at least two contents providing unit to the transmitter to transmit the service contents and enables the receiving side to receive the service contents without performing the separate operations.
  • FIG. 8 is a block diagram for explaining the emergency broadcasting apparatus according to another exemplary embodiment of the present invention.
  • the emergency broadcasting apparatus includes a receiver 100, a co-channel repeater 200, an emergency broadcasting unit 300, and a transmitter 400 and can repeat broadcasting channels, for example, three terrestrial DMB channels and simultaneously broadcast the emergency broadcasting to three channels.
  • the receiver 100 includes a band pass filter (BPF) 110 and a low noise amplifier (LNA) 120.
  • BPF band pass filter
  • LNA low noise amplifier
  • the band pass filter 110 passes through a bandwidth having three terrestrial DMB channels.
  • the LAN 120 performs the low-noise amplification on the signals passing through the band pass filter 110 and transmits them to the co-channel repeater 200 and the emergency broadcasting unit 300.
  • the co-channel repeater 200 includes a down converter 210, a signal processor 220, and an up converter 230.
  • the down converter 210 down-converts the signals transmitted from the LAN 120, that is, the terrestrial DMB signal into an IF frequency and down-converts coupled reference signals into an IF frequency in the transmitting antenna 500.
  • the signal processor 220 includes an echo removing unit 221 and an equalizer 222.
  • the echo removing unit (ICS) 221 receives the signals down-converted from the down converter 210 and removes a feedback signal (F/B) received to the receiving antenna 600 into which the signal transmitted from the transmitting antenna 500 is received.
  • the equalizer 222 removes the multi-path signals received in the receiving antenna 600 or the Doppler effect due to vehicles downtown from the down-converted terrestrial DMB signals.
  • the up converter 230 includes a switch to switch the removed terrestrial DMB signals and the signals processed in the emergency broadcasting unit 300 and up-converts the switched signals into the terrestrial DMB RF frequency.
  • the emergency broadcasting unit 300 includes an encoder 310, a multiplexer/re-multiplexer 320, and a modulator 330.
  • the encoder 310 includes an audio/video encoder 311 and a data encoder 312 and transmits the encoded signals to the multiplexer/re-multiplexer 320.
  • the audio/video encoder 311 encodes the input audio or video emergency broadcasting signals.
  • the data encoder 312 encodes the input data emergency broadcasting signals.
  • At least one of audio, video, and data emergency broadcasting signals may be input by an operator.
  • the emergency message may be input to the emergency broadcasting unit 300 through input terminals such as a mike or a keyboard.
  • the multiplexer/re-multiplexer 320 which is a 3-channel terrestrial DMB ensemble multiplexer, analyzes the fast information channel (FIC) of the terrestrial DMB signals transmitted from the LAN 120 to obtain bit rate for at least one of audio, video, and data in the existing terrestrial DMB or service information such as a protection level, for example, and processes at least one of the encoded audio, video, and data emergency broadcasting signals according to the service information to re-multiplex it as an ensemble transport interface (ETI) protocol.
  • FIC fast information channel
  • ETI ensemble transport interface
  • the modulator 330 modulates at least one of the re-multiplexed audio, video, and data emergency broadcasting signals by using a coded-orthogonal frequency division multiplexing (COFDM) transmission method.
  • COFDM coded-orthogonal frequency division multiplexing
  • the transmitter 400 includes an amplifier 410 and a filter 420.
  • the amplifier 410 amplifies the signals transmitted from the up-converter 230.
  • the filtering unit 420 band passes the transmitted signals according to a terrestrial DMB spectrum mask standard
  • the emergency broadcasting apparatus can prevent the deterioration in the quality of the repeating signals.
  • high-quality repeating services may be provided in the tunnel or underground.
  • the deterioration in the quality of the received signals can be prevented when the height of the receiving antenna for repeating broadcasting is low or there are obstacles such as adjacent buildings or trees, etc., and when high quality repeating services may be provided to the tunnel or underground by adopting the equalizer that can remove the Doppler effect of the received signals due to vehicles when the receiving antenna is positioned at the roadside.
  • the emergency broadcasting apparatus of the present invention performs the switching to the emergency broadcasting service from the co-channel repeating service in the RF band and the emergency broadcasting unit 300 generates and provides the RF signal according to each channel to degrade the efficiency.
  • the emergency broadcasting apparatus of the present invention uses a specific IF frequency in the co-channel repeating services and switches the emergency broadcasting service in the IF band, thereby making it possible to easily provide the emergency broadcasting service in the entire terrestrial DMB frequency band.
  • the broadcasting apparatus may be a broadcasting apparatus having various broadcasting standards.
  • the broadcasting apparatus may be a broadcasting apparatus for providing a digital audio broadcasting service or a digital video broadcasting service.
  • it can transmit different service signals so that the service signals can be received without performing separate operations at the receiving side.
  • the present invention can prevent deterioration in quality of the repeating signal.
  • the present invention can provide the high quality repeating services in underground.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Transmitters (AREA)
  • Circuits Of Receivers In General (AREA)
EP10195172A 2009-12-21 2010-12-15 Appareil et procédé de transmission de contenu de service et appareil de diffusion d'urgence Withdrawn EP2357746A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12157064A EP2461500A3 (fr) 2009-12-21 2010-12-15 Appareil et procédé de transmission de contenu de service et appareil de diffusion d'urgence

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090127734A KR20110071228A (ko) 2009-12-21 2009-12-21 전환 신호 송신 방법 및 장치
KR1020090127733A KR101341045B1 (ko) 2009-12-21 2009-12-21 등화기능을 구비한 터널용 지상파 디엠비 재난 방송 장치 및 방법

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EP2357746A1 true EP2357746A1 (fr) 2011-08-17

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EP12157064A Withdrawn EP2461500A3 (fr) 2009-12-21 2010-12-15 Appareil et procédé de transmission de contenu de service et appareil de diffusion d'urgence
EP10195172A Withdrawn EP2357746A1 (fr) 2009-12-21 2010-12-15 Appareil et procédé de transmission de contenu de service et appareil de diffusion d'urgence

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EP12157064A Withdrawn EP2461500A3 (fr) 2009-12-21 2010-12-15 Appareil et procédé de transmission de contenu de service et appareil de diffusion d'urgence

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20110429A1 (it) * 2011-05-13 2012-11-14 Bayerischer Rundfunk Anstalt Des Oe Ffentlichen Re System und verfahren zum einspeisen von einzuspeisenden mediendaten in einen multiplex

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015999A2 (fr) * 1995-10-27 1997-05-01 Digital D.J. Inc. Systeme de radiodiffusion transmettant des donnees supplementaires avec le programme diffuse
DE19610400A1 (de) * 1996-03-16 1997-09-18 Deutsche Telekom Ag Audio- und Datenumschaltgerät und -verfahren
US20030122924A1 (en) * 2001-12-31 2003-07-03 Nokia Corporation Remote server switching of video streams
WO2006035242A2 (fr) * 2004-09-30 2006-04-06 Radioscape Limited Systeme de transmission de messages d'urgence et procede associe
EP1816764A2 (fr) * 2006-02-07 2007-08-08 Kabushiki Kaisha Toshiba Appareil de radiodiffusion pour un espace fermé
US20080209466A1 (en) * 2007-02-22 2008-08-28 Takaharu Ishida Broadcasting data converter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10313286A (ja) * 1997-05-13 1998-11-24 Sony Corp 受信装置
JP2000278236A (ja) * 1999-03-23 2000-10-06 Kenwood Corp ディジタル放送受信機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015999A2 (fr) * 1995-10-27 1997-05-01 Digital D.J. Inc. Systeme de radiodiffusion transmettant des donnees supplementaires avec le programme diffuse
DE19610400A1 (de) * 1996-03-16 1997-09-18 Deutsche Telekom Ag Audio- und Datenumschaltgerät und -verfahren
US20030122924A1 (en) * 2001-12-31 2003-07-03 Nokia Corporation Remote server switching of video streams
WO2006035242A2 (fr) * 2004-09-30 2006-04-06 Radioscape Limited Systeme de transmission de messages d'urgence et procede associe
EP1816764A2 (fr) * 2006-02-07 2007-08-08 Kabushiki Kaisha Toshiba Appareil de radiodiffusion pour un espace fermé
US20080209466A1 (en) * 2007-02-22 2008-08-28 Takaharu Ishida Broadcasting data converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20110429A1 (it) * 2011-05-13 2012-11-14 Bayerischer Rundfunk Anstalt Des Oe Ffentlichen Re System und verfahren zum einspeisen von einzuspeisenden mediendaten in einen multiplex

Also Published As

Publication number Publication date
EP2461500A2 (fr) 2012-06-06
EP2461500A3 (fr) 2012-08-01

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