WO2011043544A2 - Appareil relais de transmission de données auxiliaires pour diffusion de télévision numérique terrestre et procédé associé - Google Patents

Appareil relais de transmission de données auxiliaires pour diffusion de télévision numérique terrestre et procédé associé Download PDF

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Publication number
WO2011043544A2
WO2011043544A2 PCT/KR2010/006078 KR2010006078W WO2011043544A2 WO 2011043544 A2 WO2011043544 A2 WO 2011043544A2 KR 2010006078 W KR2010006078 W KR 2010006078W WO 2011043544 A2 WO2011043544 A2 WO 2011043544A2
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WO
WIPO (PCT)
Prior art keywords
additional data
signal
output
dtv
transmission
Prior art date
Application number
PCT/KR2010/006078
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English (en)
Korean (ko)
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WO2011043544A3 (fr
Inventor
서재현
박성익
음호민
임형수
김흥묵
Original Assignee
한국전자통신연구원
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 KR1020100049581A external-priority patent/KR101390846B1/ko
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to US13/498,697 priority Critical patent/US20120185909A1/en
Publication of WO2011043544A2 publication Critical patent/WO2011043544A2/fr
Publication of WO2011043544A3 publication Critical patent/WO2011043544A3/fr

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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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division

Definitions

  • the present invention relates to a relay apparatus for transmitting additional data and a method thereof, and more particularly to a relay apparatus and method for transmitting additional data of terrestrial digital television broadcasting.
  • the transmission method of such a television broadcast must be transmitted through a repeater, except for receiving broadcast service data directly from cable and satellite provided by wire. This is because television broadcasting must transmit the same broadcasting data over a wide range.
  • 1 is a configuration diagram of an RF amplifying relay apparatus for relaying a television broadcast signal.
  • the receiving antenna 101 and the RF receiving unit 102 receive an RF signal transmitted from a broadcasting station or another repeater (hereinafter referred to as a “main transmitter”).
  • the signal received at the RF receiver 102 is an RF signal of a predetermined band for the reception of a broadcast signal, but in reality the band is a signal of a wider band than a band only for the broadcast signal. Therefore, the RF bandpass filter 103 filters only the desired band, that is, the band signal of the actual broadcast signal.
  • the broadcast signal filtered by the RF bandpass filter 103 is amplified by the power for transmission in the high power amplifier 104 and transmitted to the band of the repeater through the transmission antenna 105.
  • FIG. 2 is a configuration diagram of a relay apparatus for converting and transmitting a television broadcast signal by converting an intermediate frequency (IF).
  • IF intermediate frequency
  • the receiving antenna 201 and the RF receiving unit 202 receive the RF signal transmitted from the main transmitter.
  • the signal received by the RF receiver 202 is converted into an intermediate frequency by the intermediate frequency (IF) down converter 203 and then input to the IF bandpass filter 204.
  • the IF bandpass filter 204 filters and outputs only the IF signal corresponding to the broadcast signal among the signals converted into the IF band.
  • the filtered IF signal is input to the RF up-converter 205.
  • the RF up-converter 205 performs band-up conversion on the broadcast signal of the RF band for transmitting the broadcast signal of the IF band again and outputs it to the high power amplifier 206.
  • the high power amplifier 206 then amplifies the RF signal with a predetermined amplification and is then transmitted through the transmit antenna 207 to a given channel.
  • a relay apparatus for relaying a broadcast signal of a digital television relays a signal transmitted from a main transmitter as it is. That is, in the case of the relay apparatus of FIGS. 1 and 2, additional data inserted in the DTV broadcast signal before modulation in the baseband may be relayed by the main transmitter without special manipulation.
  • the relay device of Figs. 1 and 2 cannot remove the noise caused by the transmission path between the main transmitter and the relay device and the system noise added in the relay system, the characteristic of the output signal is not limited to the input signal. It has a worse disadvantage.
  • FIG. 3 is a block diagram of a playback type relay apparatus that performs a modulation / demodulation process of a broadcast signal.
  • the receiving antenna 301 and the RF receiving unit 302 receive the RF signal transmitted from the main transmitter.
  • the RF signal received as described above is down-converted from the RF signal to the IF signal by the IF down converter 303.
  • the IF signal is input to the demodulator 304 and demodulated into the transmitted baseband broadcast signal.
  • the broadcast signal converted into the baseband signal as described above is input to the equalizer and the FEC decoder 305.
  • the equalizer and the FEC decoder 305 decode and output the input baseband broadcast signal by equalizing and error correcting encoded signals.
  • the equalizer and the FEC decoder 305 may remove noise and multipath signals caused by a transmission path between the main transmitter and the relay device through equalization and demodulation. In addition, the equalizer and the FEC decoder 305 may eliminate an error occurring in the transmission path.
  • the equalizer and the FEC decoder 305 are input to the FEC encoder 306 to remove the noise and the multipath signal caused by the transmission path between the main transmitter and the relay device.
  • the FEC encoder 306 encodes the signal from which the noise caused by the transmission path, the multipath signal, and the like are removed again using an error correction code.
  • the encoded signal is modulated into a signal of the IF band by the modulator 307 and then input to the RF up-converter 308.
  • the RF up-converter 308 converts the signal of the IF band into a signal of the RF band to be transmitted and is input to the high power amplifier 309.
  • the high power amplifier 309 amplifies the RF signal with a predetermined amplification signal and transmits the same through the transmission antenna 310.
  • FIG. 4 is a configuration diagram of an apparatus for equalizing and broadcasting a broadcast signal.
  • the reception antenna 401 and the RF receiver 402 are RF signals transmitted from a main transmitter and receive only signals of a desired band, that is, a broadcast signal band.
  • the received signal of the desired band is input to the IF down converter 403 and down-converted to the IF band.
  • the IF band down-converted signal is input to the demodulator 404.
  • the demodulator 404 demodulates the IF band signal into a baseband signal.
  • the baseband signal is input to the equalizer 405.
  • the equalizer 405 removes the noise and the multipath signal caused by the transmission path between the main transmitter and the relay device from the demodulated baseband signal. Then, a signal from which noise and multipath signals caused by the transmission path between the main transmitter and the relay device are removed is input to the modulator 406 to convert the baseband signal from which the noise and multipath signals are removed to an IF signal. .
  • the signal converted to the IF band is input to the RF up-conversion unit 407 and converted into a signal of the RF band to be transmitted. Thereafter, the RF band signal is input to the high power amplifier 408, amplified according to a preset power amplification degree, and then transmitted through the transmission antenna 409.
  • the equalizer or the equalizer and the FEC decoder decode the noise caused by the transmission path between the main transmitter and the relay apparatus and the system noise added in the relay system. Since the FEC encoder and the modulator are equalized or FEC decoding and encoding are performed, the characteristics of the output signal are excellent.
  • additional data may be transmitted together with a television broadcast signal.
  • the additional data inserted before the modulator in the baseband passes through the equalizer or the equalizer, the FEC decoder, and the FEC encoder, leaving only the DTV broadcast signal to relay the additional data. I can't have a problem.
  • a repeater apparatus capable of relaying additional data inserted in a DTV broadcast signal while removing noise caused by a transmission path between the main transmitter and the repeater and system noise added to the repeater system, and the like Provide a method.
  • the present invention provides a relay apparatus and method capable of smoothly transmitting additional data embedded in a DTV broadcast signal.
  • the present invention provides a relay apparatus and method capable of improving the reception quality of the additional data inserted into the terrestrial DTV broadcast signal.
  • An apparatus is a relay apparatus for relaying a digital broadcast (DTV) signal including additional data, and receives the additional data and the DTV signal through a receiving antenna to an intermediate frequency (IF) signal.
  • a reception processor which demodulates the IF signal after down-conversion, an equalizer which removes and outputs a noise and a multipath signal from the signal of the reception processor, and extracts additional data that extracts and outputs the additional data from the output signal of the equalizer
  • an adder for coupling the output of the additional data processor to the DTV signal outputted from the equalizer, modulating the added output, upconverting the transmit power to a transmit RF band, and amplifying the transmit power to transmit through a transmit antenna.
  • a transmission processing section which demodulates the IF signal after down-conversion, an equalizer which removes and outputs a noise and a multipath signal from the signal of the reception processor, and extracts additional data that extracts and outputs the additional data from the output signal of the equalizer
  • an adder for coupling the output
  • An apparatus is a relay apparatus for relaying a digital broadcast (DTV) signal including additional data, and receives the additional data and the DTV signal through a receiving antenna to an intermediate frequency (IF) signal.
  • a reception processor which demodulates the IF signal after down-conversion, an equalizer that removes and outputs noise and multipath signals from the signal of the reception processor, and extracts and decodes the additional data from the output signal of the equalizer beforehand
  • An additional data processing unit for encoding the determined error correction code, an adder for coupling the output of the additional data processing unit to the DTV signal output from the equalizer, and modulating the added output, up-converting the transmission RF band, and transmitting
  • a transmission processor for amplifying the power and transmitting the same through a transmission antenna.
  • An apparatus is a relay device for relaying a digital broadcasting (DTV) signal including additional data, and receives the additional data and the DTV signal through a receiving antenna to receive an intermediate frequency (IF) signal.
  • a reception processor which demodulates an IF signal after downconverting to an equalizer, an equalizer that removes and outputs a noise and a multipath signal from the signal of the reception processor, and a predetermined error after decoding a broadcast signal among the output signals of the equalizer
  • a DTV signal processor for encoding with a correction code, an additional data processor for extracting and decoding the additional data from an output signal of the equalizer, and encoding the error code with a predetermined error correction code, and an additional data processor for outputting the DTV signal processor
  • An adder for coupling the output of the modulator, modulating the added output, upconverting to the transmit RF band, and transmitting It amplifies the power to a transmission processing unit for transmitting via the transmission antennas.
  • the method according to an embodiment of the present invention is a relay method for relaying a digital broadcasting (DTV) signal including additional data, and receiving the additional data and the DTV signal and converting the intermediate frequency (IF) signal downlink.
  • DTV digital broadcasting
  • IF intermediate frequency
  • a method is a relay method for relaying a digital broadcast (DTV) signal including additional data, and after receiving the additional data and the DTV signal and converting it to an intermediate frequency (IF) signal
  • DTV digital broadcast
  • IF intermediate frequency
  • a transmission process for transmitting for transmitting.
  • a method is a relay method for relaying a digital broadcast (DTV) signal including additional data, and receiving the additional data and the DTV signal and down converting the intermediate frequency (IF) signal.
  • the additional data inserted in the baseband by the transmitter is added to the additional data extractor or additional data extractor and the FEC decoder or additional data FEC encoder in the relay device to output the output signal of the relay device.
  • the additional data received from the transmitter can also be relayed.
  • 1 is a configuration diagram of an RF amplifying relay device for relaying a television broadcast signal
  • FIG. 2 is a configuration diagram of a relay apparatus for converting and transmitting a television broadcast signal by intermediate frequency (IF);
  • FIG. 3 is a configuration diagram of a reproducing relay apparatus performing modulation / demodulation process of a broadcast signal
  • FIG. 4 is a block diagram of an apparatus for equalizing and broadcasting a broadcast signal
  • FIG. 5 is an internal block diagram of a repeater for transmitting additional data of terrestrial digital television broadcasting according to an embodiment of the present invention
  • FIG. 6 is a block diagram illustrating an internal block of a repeater for transmitting additional data of terrestrial digital television broadcasting according to another embodiment of the present invention
  • FIG. 7 is an internal block diagram of a repeater for transmitting additional data of terrestrial digital television broadcasting according to another embodiment of the present invention.
  • FIG. 8 is a block diagram of an embodiment of an additional data extraction unit according to the present invention.
  • 5 is an internal block diagram of a repeater for transmitting additional data of terrestrial digital television broadcasting according to an embodiment of the present invention. 5 illustrates the internal block configuration of the repeater including the decoding and encoding described above.
  • the receiving antenna 501 and the RF receiving unit 502 receive the RF signal transmitted from the main transmitter.
  • the RF signal received as described above is down-converted from the RF signal to the IF signal by the IF down converter 503.
  • the IF signal is input to the demodulator 504 and demodulated into the transmitted baseband broadcast signal.
  • the broadcast signal converted into the baseband signal in this way is input to the equalizer 505.
  • the RF receiver 502, the IF down-converter 503, and the demodulator 504 described above are referred to as "receive processing units".
  • the equalizer 505 removes and outputs a noise and a multipath signal caused by a transmission path between the main transmitter and the relay device from the baseband signal demodulated by the demodulation unit 504 of the reception processor.
  • the equalizer 505 according to the present invention outputs a signal from which noise and a multipath signal are removed to the DTV signal processor 520 and the additional data processor 530, respectively.
  • the DTV signal processor 520 includes an FEC decoder 506 and an FEC encoder 507 as shown in FIG. 3 described above.
  • the FEC decoder 506 decodes the error correction using the signal from which the noise, the multipath signal, etc. are removed, and outputs it.
  • the FEC encoder 507 then encodes using the predetermined error correction code to retransmit the FEC decoder 506 output signal.
  • the additional data processor 530 includes an additional data extractor 508, an additional data FEC decoder 509, and additional data in order to efficiently relay additional data provided by the terrestrial digital broadcasting service in the relay device.
  • the FEC encoder 510 is included.
  • the additional data extractor 508 extracts and outputs additional data inserted into the DTV broadcast signal equalized by the equalizer 505. Then, the additional data FEC decoding unit 509 decodes the extracted additional data according to a predetermined encoding scheme and decodes the additional data into original data. Thereafter, the decoded additional data is subjected to error correction encoding to be encoded in the same coding scheme as that transmitted from the additional data FEC encoder 510.
  • the encoding scheme of the digital broadcast signal and the encoding scheme of the additional data may be the same or different. In the present invention, there is no restriction on the encoding schemes of the respective signals.
  • the adder 511 adds the signals encoded and output by the DTV signal processor 520 and the additional data processor 530, respectively. That is, the FEC encoder 507 of the DTV signal processor 520 inserts or combines the error corrected coded additional data by the FEC encoder 510 of the additional data processor 530. The signals encoded and combined in this manner are input to the modulator 512.
  • the modulator 512 modulates the DTV broadcast signal into which the additional data is inserted and converts the signal into an IF band signal.
  • the RF up-converter 513 converts the IF signal into an RF signal and outputs the converted RF signal.
  • the signal converted into the RF signal as described above is amplified by the high power amplifier 514 in advance or variably according to the radio wave environment and then transmitted through the transmission antenna 515.
  • the modulator 512, the RF up-converter 513, and the high power amplifier 515 described above are referred to as a "transmit processor".
  • 6 is a block diagram illustrating an internal block of a repeater for transmitting additional data of terrestrial digital television broadcasting according to another embodiment of the present invention. 6 illustrates an internal block configuration of the equalization repeater described above.
  • the receiving antenna 601 and the RF receiving unit 602 receive the RF signal transmitted from the main transmitter.
  • the received RF signal is down-converted from the RF signal to the IF signal by the IF down converter 603.
  • the IF signal is input to the demodulator 604 and demodulated into the transmitted baseband broadcast signal.
  • the broadcast signal converted into the baseband signal in this way is input to the equalizer 605.
  • the RF receiver 602, the IF down converter 603, and the demodulator 604 described above are referred to as a "receive processor".
  • the equalizer 605 removes and outputs a noise and a multipath signal caused by a transmission path between the main transmitter and the relay device from the demodulated baseband signal.
  • the equalizer 605 according to the present invention outputs a signal from which noise and a multipath signal are removed to the adder 608 and the additional data processor 630, respectively.
  • the additional data extracting unit and the FEC decoding unit 606 extract the additional data inserted into the DTV broadcast signal equalized by the equalizer 605 and then perform FEC decoding on the extracted additional data according to a predetermined encoding method to perform additional data. Decode the original data. Thereafter, the decoded additional data is subjected to error correction encoding to be encoded in the same coding scheme as that transmitted from the additional data FEC encoder 607.
  • the encoding scheme of the digital broadcast signal and the encoding scheme of the additional data may be the same or different. In the present invention, there is no restriction on the encoding schemes of the respective signals.
  • the adder 608 adds the signal encoded and output by the equalizer 605 and the additional data processor 630. That is, the equalizer 605 inserts or combines the DTV broadcast signal from which the noise and the multipath signal have been removed and the additional data encoded by the error correction coded by the additional data FEC encoder 607 of the additional data processor 630. The combined signal is input to the modulator 609.
  • the modulator 609 modulates the DTV broadcast signal into which the additional data is inserted and converts the signal into an IF band signal.
  • the RF up-converter 610 converts the IF signal into an RF signal and outputs the signal.
  • the signal converted into the RF signal as described above is amplified by the high power amplifier 611 according to a preset or propagation environment and then transmitted through the transmission antenna 612.
  • the modulator 609, the RF up-converter 610, and the high power amplifier 611 described above are also referred to as "transmission processing units".
  • FIG. 7 is an internal block diagram of a repeater for transmitting additional data of terrestrial digital television broadcasting according to another embodiment of the present invention.
  • the receiving antenna 701 and the RF receiving unit 702 receive the RF signal transmitted from the main transmitter.
  • the received RF signal is down-converted from the RF signal to the IF signal by the IF down converter 703.
  • the IF signal is input to the demodulator 704 and demodulated into the transmitted baseband broadcast signal.
  • the broadcast signal converted into the baseband signal in this way is input to the equalizer 705.
  • the RF receiver 702, the IF down-converter 703, and the demodulator 704 described above are also referred to as "receive processing units".
  • the equalizer 705 removes and outputs noise and multipath signals caused by the transmission path between the main transmitter and the relay device from the demodulated baseband signal.
  • the equalizer 705 according to the present invention outputs a signal from which noise and a multipath signal are removed to the adder 707 and the additional data extractor 706, respectively.
  • the adder 707 adds the signal encoded and output by the equalizer 705 and the additional data extractor 706. That is, the equalizer 705 inserts or combines the data of the DTV broadcast signal from which the noise and the multipath signal are removed and the additional data extractor 706. The combined signal is input to the modulator 708.
  • the modulator 708 modulates the DTV broadcast signal into which the additional data is inserted and converts the signal into an IF band signal.
  • the RF up-converter 709 converts the IF signal into an RF signal and outputs the converted RF signal.
  • the signal converted into the RF signal is amplified by the high power amplifier 710 in advance or variably according to a radio wave environment, and then transmitted through the transmission antenna 711.
  • the modulator 709, the RF up-converter 710, and the high power amplifier 711 described above are also referred to as "transmit processors".
  • FIG. 8 is a block diagram of an embodiment of an additional data extracting unit according to the present invention.
  • the additional data extractor of FIG. 8 may be applied to all of the additional data extractors described with reference to FIGS. 5 to 7.
  • the additional data extracting unit includes a symbol determining unit 801 and an adder 802.
  • the equalizers 505, 605, and 705 output a signal from which noise and a multipath signal are removed from the DTV broadcast signals including additional data.
  • the equalized signals are divided into two, one of which is input to the symbol determining unit 801, and the other of which is input to the adder 802.
  • the symbol determiner 801 hard-determines and outputs a signal input from the equalizer, that is, a symbol.
  • the hard decision symbol is input to the adder 802 again.
  • the adder 802 then calculates and outputs the difference between the symbol output from the equalizer and the hard decision symbol in the symbol determination unit 801.
  • the difference value calculated by the adder 802 is output as additional data.
  • the repeater according to the present invention includes an additional data extractor, an additional data extractor, an FEC decoder, an additional data FEC encoder, and the like in a conventional reproduction type repeater and an equalization repeater. By adding them separately, additional data can be relayed while maintaining the transmission signal quality of the relay device. That is, by adding the apparatus according to the present invention to the existing equipment can be used even in the case of the DTV signal.
  • the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.
  • a recording medium CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.

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  • Multimedia (AREA)
  • Radio Relay Systems (AREA)
  • Details Of Television Systems (AREA)

Abstract

La présente invention concerne un appareil relais de transmission de données auxiliaires et un procédé associé, et en particulier un appareil relais de transmission de données auxiliaires pour diffusion de télévision numérique terrestre et un procédé associé. L'appareil selon un mode de réalisation de la présente invention comporte : un appareil relais servant à relayer un signal de diffusion numérique (Digital Television, DTV) contenant des données auxiliaires ; une unité de réception et de traitement servant à recevoir les données auxiliaires et le signal DTV via une antenne réceptrice, à convertir le signal reçu en l'abaissant pour donner un signal de fréquence intermédiaire (IF) et à démoduler le signal IF ; une unité d'égalisation servant à éliminer le bruit et un signal se propageant par trajets multiples du signal de sortie de l'unité de réception et de traitement, et à présenter en sortie le signal résultant ; une unité d'extraction de données auxiliaires servant à extraire les données auxiliaires du signal de sortie de l'unité d'égalisation et à présenter en sortie les données auxiliaires extraites ; un additionneur servant à ajouter la sortie de l'unité d'extraction de données auxiliaires au signal DTV issu de l'unité d'égalisation ; et une unité d'émission et de traitement servant à moduler la sortie de l'additionneur, à convertir la sortie modulée en élevant la fréquence jusqu'à une bande RF d'émission, à amplifier la puissance d'émission et à émettre la puissance amplifiée via une antenne émettrice.
PCT/KR2010/006078 2009-10-05 2010-09-08 Appareil relais de transmission de données auxiliaires pour diffusion de télévision numérique terrestre et procédé associé WO2011043544A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/498,697 US20120185909A1 (en) 2009-10-05 2010-09-08 Relay apparatus for transmitting ancillary data for a terrestrial digital television broadcast, and method for same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20090094301 2009-10-05
KR10-2009-0094301 2009-10-05
KR1020100049581A KR101390846B1 (ko) 2009-10-05 2010-05-27 지상파 디지털 텔레비전 방송의 부가 데이터 전송을 위한 중계 장치 및 그 방법
KR10-2010-0049581 2010-05-27

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WO2011043544A2 true WO2011043544A2 (fr) 2011-04-14
WO2011043544A3 WO2011043544A3 (fr) 2011-07-21

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040099878A (ko) * 2003-05-20 2004-12-02 한국전자통신연구원 지상파 디지털 텔레비젼 방송신호를 위한 동일채널중계장치 및 그 방법
KR20060055494A (ko) * 2006-04-20 2006-05-23 엘지전자 주식회사 디지털 방송 송/수신 시스템 및 방법
KR20080090765A (ko) * 2007-04-06 2008-10-09 엘지전자 주식회사 디지털 방송 시스템 및 데이터 처리 방법
KR20090019463A (ko) * 2007-08-21 2009-02-25 한국전자통신연구원 동일 채널 중계 장치 및 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040099878A (ko) * 2003-05-20 2004-12-02 한국전자통신연구원 지상파 디지털 텔레비젼 방송신호를 위한 동일채널중계장치 및 그 방법
KR20060055494A (ko) * 2006-04-20 2006-05-23 엘지전자 주식회사 디지털 방송 송/수신 시스템 및 방법
KR20080090765A (ko) * 2007-04-06 2008-10-09 엘지전자 주식회사 디지털 방송 시스템 및 데이터 처리 방법
KR20090019463A (ko) * 2007-08-21 2009-02-25 한국전자통신연구원 동일 채널 중계 장치 및 방법

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