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WO2008102965A1 - Système de distribution de signaux de radiodiffusion mdu par transmission d'informations de radiodiffusion séparément - Google Patents

Système de distribution de signaux de radiodiffusion mdu par transmission d'informations de radiodiffusion séparément Download PDF

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Publication number
WO2008102965A1
WO2008102965A1 PCT/KR2008/000905 KR2008000905W WO2008102965A1 WO 2008102965 A1 WO2008102965 A1 WO 2008102965A1 KR 2008000905 W KR2008000905 W KR 2008000905W WO 2008102965 A1 WO2008102965 A1 WO 2008102965A1
Authority
WO
WIPO (PCT)
Prior art keywords
broadcasting
signal
mdu
signals
data
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.)
Ceased
Application number
PCT/KR2008/000905
Other languages
English (en)
Inventor
Do-Hong Kwon
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.)
Kaonmedia Co Ltd
Original Assignee
Kaonmedia Co Ltd
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
Application filed by Kaonmedia Co Ltd filed Critical Kaonmedia Co Ltd
Publication of WO2008102965A1 publication Critical patent/WO2008102965A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of 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]
    • H04N21/40—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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • 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
    • H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
    • H04H20/63—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast to plural spots in a confined site, e.g. MATV [Master Antenna Television]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/76—Wired systems
    • H04H20/82—Wired systems using signals not modulated onto a carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1886—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
    • 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
    • H04N21/21—Server components or server architectures
    • H04N21/214—Specialised server platform, e.g. server located in an airplane, hotel, hospital
    • H04N21/2143—Specialised server platform, e.g. server located in an airplane, hotel, hospital located in a single building, e.g. hotel, hospital or museum
    • 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
    • H04N21/2381—Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
    • H04N7/104—Switchers or splitters

Definitions

  • the present invention relates to a multi-dwelling unit (MDU) broadcasting signal distribution system, and more specifically, to a MDU broadcasting signal distribution system that receives a broadcasting signal in a multiplex house or building where an IP network is provided, and further that divides the broadcasting signal into broadcasting information and broadcasting A/V data to transmit to respective MDU set-top boxes through IP network.
  • MDU multi-dwelling unit
  • the MDU is an Internet connection device used in a large-scale residence, which
  • MDU being capable of connecting users to the Internet by using an existing telephone line or an IP network installed in a multiplex house or building.
  • the Internet can be used by using IP network within the multiplex house.
  • DMB Digital Multimedia Broadcasting
  • cable broadcasting a broadcasting receiving antenna needs to be installed separately from IP network, or a coaxial cable line is separately needed.
  • an MDU set-top box which can receive a broadcasting signal through IP network.
  • a broadcasting signal distribution system which can effectively receive a broadcasting signal and distribute and manage the broadcasting signal, is needed in order to watch satellite broadcasting, DMB, and cable broadcasting in each home through IP network installed in a multiplex house.
  • Broadcasting signals transmitted through an IP network includes broadcasting information as well as broadcasting A/V data, the broadcasting information including various additional descriptions related to corresponding broadcasting. About 5-6 Mbps is allocated per IP band. Therefore, when the same broadcasting information is included in a broadcasting signal for each channel, the broadcasting information is duplicated through the entire IP network. Therefore, IP network is ineffectively utilized.
  • An advantage of the present invention is that it provides a MDU broadcasting signal distribution system which divides a broadcasting signal into broadcasting information and broadcasting A/V data and imparts IP addresses to the broadcasting information signal and the broadcasting A/V data signal, respectively, to distribute to MDU set-top boxes installed in a multiplex house or building where an IP network is provided. Therefore, since the broadcasting information is not duplicately transmitted, IP network can be more effectively utilized.
  • an MDU broadcasting signal distribution system comprises a broadcasting signal receiving unit that receives a broadcasting signal; an MDU module that divides multi-channel signals included in the broadcasting signal into broadcasting signals for respective channels, extracts broadcasting information from the broadcasting signals for the respective channels to combine as one or more pieces of combined broadcasting information, extracts broadcasting A/V data signals from the broadcasting signals for the respective channels, imparts IP addresses to the combined broadcasting information signals and the broadcasting A/V data signals for the respective channels so as to generate an IP mapping table, and packetizes the broadcasting A/V data signals, the combined broadcasting information signals, and the IP mapping table to transmit in a multicast manner; a switch unit that receives the packet signal from the MDU module and then transmits the packet signal by distributing the packet signal as one or more signals; and an MDU set- top box that receives the packet signal from the switch unit so as to extracts the IP mapping table, receives a packet signal from the IP address imparted to the combined broadcasting information
  • the set- top box is connected to IP network so as to receive satellite, terrestrial, and cable broadcastings without a dish- shaped antenna or cable being installed. Therefore, broadcasting signals can be effectively distributed to each home such that desired broadcasting can be seen in the home.
  • broadcasting can be selectively provided to MDU set- top boxes belonging to a specific group.
  • FIG. 1 is a block diagram of an MDU broadcasting signal distribution system according to an embodiment of the present invention.
  • FIG. 2 is a block diagram showing the internal configuration of an MDU module according to the embodiment of the invention.
  • FIG. 3 is a block diagram showing the internal configuration of an MDU set- top box according to the embodiment of the invention.
  • FIG. 4 is a flow chart showing an operation between the MDU module and an L3 switch according to the embodiment of the invention.
  • FIG. 5 is a flow chart showing an operation between the L3 switch and the MDU set-top box according to the embodiment of the invention.
  • FIG. 6 is a diagram showing the structure of UDP data including MPEG-2 TS according to the embodiment of the invention.
  • FIG. 1 is a block diagram of an MDU broadcasting signal distribution system according to an embodiment of the invention. As shown in FIG. 1, the MDU broadcasting signal distribution system includes a broadcasting signal receiving unit
  • the broadcasting signal receiving unit 100 is a device for receiving a broadcasting signal transmitted from outside, and a dish-shaped antenna or the like for receiving a satellite signal may be used as the broadcasting signal receiving unit 100.
  • the broadcasting signal receiving unit 100 can receive satellite-broadcasting such as DVB-
  • the MDU module 200 receives a broadcasting signal from the broadcasting signal receiving unit 100 and then divides multi-channel signals, included in the broadcasting signal, into broadcasting signals for the respective channels. [22] The MDU module 200 divides the broadcasting signal, provided from the broadcasting signal receiving unit 100, into broadcasting information and broadcasting A/V data. Overall broadcasting information on all channels for broadcasting signals, for example, 100-200 channels can be collected so as to be combined as single broadcasting information or can be classified into several groups such that each group is combined.
  • broadcasting information on satellite signals can be combined by the unit of transponder.
  • satellite broadcasting signals are received from 10 transponders and 12 broadcasting channels are present for a broadcasting signal received from one transponder, 10 pieces of combined broadcasting information are generated, of which each includes broadcasting information on 12 broadcasting channels.
  • the MDU module 200 extracts a broadcasting A/V data signal for each channel from the broadcasting signal provided from the broadcasting receiving unit 100.
  • 'broadcasting A/V data' means audio/video data which is actually broadcast to viewers.
  • 'broadcasting information' means additional information related to broadcasting.
  • the broadcasting information includes various SI data, such as EPG (Electronic Program Guide) and so on, related to broadcasting.
  • an IP mapping table is generated by imparting an IP address to the divided broadcasting A/V signal for each channel and the single combined broadcasting information or the combined broadcasting information for each group. Accordingly, a receiver side which receives broadcasting signals can be connected to the corresponding IP address so as to selectively receive a combined broadcasting information signal or a broadcasting A/V data signal.
  • the MDU module 200 packetizes the broadcasting A/V data signal and the combined broadcasting information signal to transmit in a multicast manner. Further, the MDU module 200 packetizes the IP mapping table to transmit in a multicast manner.
  • the broadcasting A/V data signal occupies an IP bandwidth of 3-4 Mbps
  • the broadcasting information signal occupies an IP bandwidth of 1-2 Mbps. Therefore, if a broadcasting A/V signal and a combined broadcasting information signal are transmitted together for each broadcasting signal as in the related art, an IP bandwidth of 5-6 Mbps is required for each channel. For example, when total 200 broadcasting channels are operated, the maximum bandwidth of 1200 Mbps is required.
  • the switch unit 300 receives a packet signal from the MDU modules 200 to distribute as one or more signals.
  • the switch unit 300 includes a plurality of L3 switches 310 and a plurality of L2 switches 320.
  • Each of the L3 switches 310 is directly connected to the MDU module 200 and receives a packet signal from the MDU module 200 to distribute to the L2 switches 320.
  • Each of the L2 switches 320 is directly connected to a plurality of MDU set-top boxes 400 through an Ethernet network and receives the packet signal from the L3 switch to transmit to the respective MDU set-top boxes 400.
  • the L3 switch 310 When the L3 switch 310 receives an IGMP (Internet Group Management Protocol) customer registration signal from an MDU set-top box 400 through the L2 switch 320, the L3 switch 300 transmits a corresponding packet signal to the L2 switch connected to the MDU set-top box 400, with a destination being set to the MDU set-top box 400.
  • IGMP Internet Group Management Protocol
  • IGMP is a communication protocol for implementing IP multicast.
  • a router receiving a multicast packet transmits the packet to only an LAN segment connected to a PC which declares the reception through IGMP. That is, the L3 switch 310 serving as a router transmits a packet signal to only an MDU set-top box which has sent an IGMP customer registration signal.
  • the MDU set-top box 400 receives a packet signal from the switch unit 300 and extracts an IP mapping table from the packet signal. Referring to the extracted IP mapping table, an IP address imparted to each broadcasting channel can be grasped. Further, an IP address which provides the single combined broadcasting information or combined broadcasting information for each group can be grasped.
  • the MDU set-top box 400 receives a packet signal from the IP address imparted to the combined broadcasting information signal by referring to the IP mapping table and then extracts broadcasting information from the packet signal.
  • the MDU set-top box 400 receives a packet signal from the IP address imparted to the corresponding broadcasting signal by referring to the IP mapping table and then extracts broadcasting A/V data from the packet signal. Further, the MDU set-top box 400 selects broadcasting information related to the selected broadcasting channel from the combined broadcasting information and then outputs the broadcasting information and the extracted broadcasting A/V data to the outside.
  • FIG. 2 is a block diagram showing the internal configuration of the MDU module according to the embodiment of the invention.
  • the MDU module includes a plurality of distribution modules 210, a plurality of TS-to-IP processing modules 220, a control module 230, and a switch module 240.
  • a broadcasting signal received through the broadcasting signal receiving unit 100 is distributed to the respective distribution modules 210.
  • each transponder transmits a broadcasting signal separately.
  • a distribution module 210 corresponding to the transponder separately processes the signal.
  • the TS-to-IP processing modules 220 are connected to the respective distribution modules 210 and receive broadcasting signals from the distribution modules 210.
  • Each of the TS-to-IP processing modules 220 includes a demultiplexer 211 which extracts a multi program transport stream (MPTS) from a broadcasting signal input through the corresponding distribution module 210 and then demultiplexes the MPTS into single program transport streams (SPTS); a broadcasting signal generating section 212 which extracts broadcasting information signals from the demultiplexed broadcasting signals and then combines the broadcasting information signals as a single broadcasting information signal; an A/V data extracting section 213 which extracts A/V data signals for the respective channels from the demultiplexed broadcasting signals; an IP mapping table generating section 214 which imparts an IP address to the single broadcasting information signal and the A/V data signal for each channel so as to generate an IP mapping table; and a protocol processing section 215 which applies UDP (User Datagram Protocol) to the broadcasting A/V data signal, the single
  • the demultiplexer 211 receives a broadcasting signal from the broadcasting signal receiving unit 100 and demultiplexes MPTS included in the broadcasting signal into SPTS. That is, the demultiplexer 211 divides a broadcasting signal including several programs into single program signals.
  • the IP mapping table generating section 214 allocates an IP address to a broadcasting A/V data signal of a broadcasting signal for each channel so as to generate an IP mapping table.
  • a broadcasting channel could be selected by specifying a frequency.
  • an IP mapping table is generated, so that a different IP address can be allocated to each broadcasting channel so as to transmit broadcasting data, and a broadcasting reception side can receive a broadcasting signal for each channel by referring to the IP mapping table.
  • the IP mapping table generating section 214 also allocates a separate IP address to the extracted single combined broadcasting information signal or combined broadcasting information signal for each group as well as the broadcasting A/V data signal and then reflects the IP address into the IP mapping table such that an MDU set- top box 400 receiving broadcasting signals can receive the broadcasting information separately from the broadcasting A/V data.
  • the single combined broadcasting information one IP address is allocated.
  • IP addresses corresponding to the number of groups are allocated.
  • the protocol processing section 215 packetizes demultiplexed broadcasting signals by applying UDP.
  • UDP is a communication protocol through which a sender one- sidedly transmits data without informing the transmission or reception of signals when the signals are transmitted and received on the Internet.
  • TCP transmission Control Protocol
  • UDP has a higher rate than TCP. Therefore, it is effective to apply UDP when providing a broadcasting signal of streaming type.
  • the protocol processing section 215 can apply UDP to the IP mapping table as well as the broadcasting A/V data signal and the broadcasting information signal. Since an MDU set-top box receiving broadcasting signals should select a broadcasting channel by referring to the IP mapping table, the protocol processing section 215 transmits the IP mapping table to the MDU set- top box. For this, the protocol processing section 215 packetizes the IP mapping table.
  • the control module 230 performs control to output the packet signal, generated from the TS-to-IP processing module 220, to the outside in a multicast. That is, the control module 230 transmits the packetized broadcasting information signal, broadcasting A/V data signal, and IP mapping table to the outside. In this case, the control module 230 transmits the packet signal in a multicast manner such that only MDU set-top boxes belonging to a specific group which has joined the service can receive the packet signal.
  • the switch module 240 is connected to the switch unit 300 through IP network and transmits the packet signal, generated from the TS-to-IP module 220, to the switch unit 300.
  • FIG. 3 is a block diagram showing the internal configuration of the MDU set-top box according to the embodiment of the invention.
  • the MDU set- top box includes an Ethernet port 410, an IP mapping table recognizing section 420, a central processing section 430, a tuner 440, a demultiplexer 450, a decoder 460, an A/ V output section 470, and a broadcasting information output section 480.
  • the Ethernet port 410 receives the packet signal from the switch unit 300 through an Ethernet network.
  • the IP mapping table recognizing section 420 extracts the IP mapping table from the packet signal received through the Ethernet port 410 and then stores the IP mapping table. When a broadcasting channel is selected by an external input from a user, the IP mapping table recognizing section 420 receives a broadcasting A/V data signal from an IP address imparted to the selected broadcasting channel by referring to the IP mapping table.
  • the IP mapping table recognizing section 240 can receive a packet signal from an IP address allocated to a single combined broadcasting information signal or a combined broadcasting information signal for each group by referring to the IP mapping table.
  • the combined broadcasting information for each group is used, an IP address from which a combined broadcasting information signal corresponding to a specific channel selected by a user is transmitted is acquired from the IP mapping table. In accordance with the IP address, broadcasting information can be received.
  • the central processing section 430 extracts broadcasting information from the packet signal received from the IP address imparted to the broadcasting information signal.
  • the central processing section 430 extracts a broadcasting A/V data signal from the packet signal received from the IP address imparted to the selected broadcasting channel and then converts the broadcasting A/V data signal into a signal which can be MPEG-processed. That is, since the packet signal received through the Ethernet network is a signal in which various signals divided by the packet are mixed, the central processing section 430 recovers signals which had been packetized. Then, the signals can be MPEG-decoded so as to be watched.
  • the tuner 440 directly receives a broadcasting signal from outside separately from the packetized broadcasting signal received through the Ethernet network.
  • the tuner 440 may be selectively used.
  • the demultiplexer 450 receives signals from the tuner 440 and the central processing section 430 and then demultiplexes the signals.
  • the demultiplexer 450 may receive a signal which has been recovered in the form of MPEG2-TS signal.
  • the Ethernet port 410 and the tuner 440 within the MDU set-top box are connected to the single demultiplexer 450, the con- figuration of the MDU set-top box is simplified. Further, the previously-acquired broadcasting information can be utilized during the demultiplexing process.
  • the decoder 460 MPEG-decodes the broadcasting signal demultiplexed by the demultiplexer 450 so as to obtain an original A/V broadcasting signal.
  • the A/V output section 470 modulates the decoded A/V broadcasting signal into an
  • A/V signal which can be recognized by people and then outputs the A/V signal to the outside. Then, a MDU set-top box user can watch broadcasting of the selected channel.
  • the broadcasting information output section 480 selects broadcasting information related to the broadcasting A/V data signal and then outputs the broadcasting infor mation to the outside.
  • FIG. 4 is a flow chart showing an operation between the MDU module and the L3 switch according to the embodiment of the invention.
  • the MDU module 200 receives a DVB-S or DVB-S2 signal.
  • the MDU module 200 demultiplexes MPTS included in the broadcasting signal into SPTS such that the broadcasting signal is divided for each program. Further, the MDU module 200 divides the broadcasting signal into a broadcasting information signal and a broadcasting A/V data signal and then allocates IP addresses to the broadcasting information signal and the broadcasting A/V data signal, respectively, so as to generate an IP mapping table.
  • the MDU module 200 encapsulates the demultiplexed and extracted MPEG-
  • TS signals in accordance with UDP and then converts the encapsulated signal into a packet signal.
  • the MDU module 200 transmits the packet signal, which is packetized in accordance with UDP, to the outside in a multicast manner, the operation between the MDU module 200 and the L3 switch 310 is completed.
  • an interface through which the MDU module 200 transmits the packet signal 1000 BASE-FX is used.
  • FIG. 5 is a flow chart showing an operation between the L3 switch and the MDU set-top box according to the embodiment of the invention.
  • an environment is provided in which a corresponding packet signal is transmitted to only the MDU set-top box 400 which is registered through the IGMP customer registration signal.
  • the L3 switch 310 transmits IP mapping data to the MDU set- top box 400 such that the MDU set-top box 400 can select a broadcasting channel.
  • FIG. 6 is a diagram showing the structure of UDP data including MPEG-2 TS according to the embodiment of the invention.
  • An MPEG-2 TS signal has a size of 188 byte per one packet, and total 7 MPEG-2
  • TS packets are loaded on a payload region of one UDP packet.
  • the MDU module 200 binds 7 broadcasting signals by the MPEG packet and then transmits the bound broadcasting signals to the MDU set-top box 400 through IP network.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un système de distribution de signaux d'émission MDU qui reçoit un signal de radiodiffusion dans un multiplexe ou un bâtiment dans lesquels un réseau IP est prévu, et qui divise en outre le signal de radiodiffusion en informations de radiodiffusion et en données A/V de radiodiffusion afin de les transmettre à des boîtiers décodeurs MDU respectifs par l'intermédiaire du réseau IP. Selon la présente invention, les informations de radiodiffusion et les données A/V de radiodiffusion sont transmises séparément. Par conséquent, la nécessité que les informations de radiodiffusion soient transmises de façon dupliquée à chaque canal est supprimée, ce qui rend possible l'utilisation d'une bande passante. En outre, un boîtier décodeur est relié au réseau IP afin de recevoir une radiodiffusion par satellite, des radiodiffusions terrestres et par câble sans installation d'antenne disque ou de câble. Par conséquent, des signaux de radiodiffusion peuvent être efficacement distribués vers chaque logement, de sorte que la radiodiffusion souhaitée peut être vue dans le logement. De plus, comme un protocole IGMP est appliqué, la radiodiffusion peut être sélectivement assurée vers des boîtiers décodeurs MDU appartenant à un groupe spécifique.
PCT/KR2008/000905 2007-02-24 2008-02-15 Système de distribution de signaux de radiodiffusion mdu par transmission d'informations de radiodiffusion séparément Ceased WO2008102965A1 (fr)

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KR1020070018736A KR100789133B1 (ko) 2007-02-24 2007-02-24 방송 정보를 분리 전송하는 ｍｄｕ 방송 신호 분배 시스템
KR10-2007-0018736 2007-02-24

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KR100818894B1 (ko) 2007-03-20 2008-04-04 가온미디어 주식회사 Ｉｐ 매핑테이블 전송 방식의 ｍｄｕ 방송신호 분배 시스템
KR100803396B1 (ko) 2007-03-20 2008-02-13 가온미디어 주식회사 일반 셋톱박스로 수신 가능한 ｍｄｕ 방송 신호 분배시스템

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Publication number Priority date Publication date Assignee Title
JP2002118841A (ja) * 2000-10-04 2002-04-19 Nippon Telegr & Teleph Corp <Ntt> デジタルコンテンツ配信ネットワーク、デジタルコンテンツ配信装置、デジタルコンテンツ受信装置、およびその配信方法
KR20040108067A (ko) * 2003-06-16 2004-12-23 엘지전자 주식회사 디지털 위성 방송 수신기
KR20060020420A (ko) * 2004-08-31 2006-03-06 한국전자통신연구원 홈네트워크 환경에서 부가 데이터를 이용하는 연동형 방송서비스 장치 및 그를 이용한 인핸스드 방송 서비스 시스템

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