CN101588458A - System and method of regional digital televisions based on IP network transmission - Google Patents
System and method of regional digital televisions based on IP network transmission Download PDFInfo
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- CN101588458A CN101588458A CNA2008100376673A CN200810037667A CN101588458A CN 101588458 A CN101588458 A CN 101588458A CN A2008100376673 A CNA2008100376673 A CN A2008100376673A CN 200810037667 A CN200810037667 A CN 200810037667A CN 101588458 A CN101588458 A CN 101588458A
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Abstract
The invention relates to a system and a method of regional digital televisions based on IP network transmission and discloses a system and a method for realizing regional digital television broadcasting by transmitting digital television signals on an IP backbone network in a DVB over IP mode. The method can be used to directly transmit any data stream to any region of the network by the interactive performance of the Ethernet after the IP networking of broadcasting video service, thereby not only benefiting the deployment and the extension of the network, but also benefiting resource sharing in other network frameworks and systems and enabling cable television operators to provide subscribers with programs up to several hundred. Regional television data service can be mixed with the prior news programs by frequencies according to the method so that equipment for the news programs can be used without adding new equipment.
Description
Technical field
The present invention relates to the technical field of regional digital television transfer and broadcasting, particularly a kind of by IP backbone network transmitting digital TV signal and realize the system and method for regional broadcast.
Background technology
At present, national television system is all being carried out the whole conversion work of Digital Television.Target is when the whole network is finished anolog TV signals and is converted into digital television signal, builds one and realizes that content fusion, platform fusion, the network integration, integrated services, service fusion, terminal merge the platform of six broad aspect.Wherein, satisfied the general character demand of users broadcasting TV based on Digital Television (DTV) platform of wired hfc plant; Satisfied the individual demand of user's program request as required (Video on demand) based on interactive digital television (ITV) platform of wired bilateral network.But outside user's a broadcasting general character demand and a program request letterization demand, also has a zonal group need.For example: all there is the television channel of a local area in each administrative area of big and medium-sized cities, and after the whole conversion of Digital Television, the regional public information service that will to be platform with the TV provide the public relatively to pay close attention to for the user of one's respective area by the One-to-All Broadcast mode.These programs and information all have certain regional broadcast characteristic, only need to broadcast in the one's respective area.The zone television channel has all been realized spot news broadcasting at present, yet, the important strategic status of zone television medium is along with development of market economy constantly gets a promotion, and the play content of zone television channel is along with the keen competition of TV media constantly obtains in-depth and expansion.The zone television channel all wishes to increase the broadcast program of one's respective area content, also will have except the news column: programs such as government affairs column, news column, economic column, entertainment column, tourism column.
The traditional method of area television broadcasting is based on traditional HFC backbone network transmission region TV programme.At present, the spot news program transmits with the method.Area television broadcasting has analog signal and two kinds of modes of digital signal:
1, under the simulated television platform
The regional extent that covers according to each branch center is carried out Frequency mixing processing with the anolog TV signals of spot news analog signal and the whole network broadcasting at the general headend machine room, is transmitted into each branch center machine room respectively, basic principle figure such as Fig. 1.
2, under digital TV platform
Regional broadcast analog signal digital and this spot news can be carried out Frequency mixing processing at the digital television signal of general headend machine room and the whole network broadcasting together, be transferred to each zone television central machine room then.Basic principle figure such as Fig. 2.
Summary of the invention
Key content of the present invention is: under digital TV platform, in DVB over IP mode, by IP backbone network transmitting digital TV signal, realize the system and method for area television broadcasting.
The intrinsic transmitted in both directions person's character of IP provides an ideal platform for interactive television, video request program, recreation, TV commercial affairs.If set up the IP/Ethernet network of data and telephone service, and also tentatively disposed based on the VOD system of Gigabit Ethernet/IP over DWDM backbone transport network and to have finished.According to method of the present invention, the marginal cost that increases the broadcast video business on existing IP/Ethernet will be very low.IP/Ethernet has good efficient and capacity.The traffic of IP/Ethernet carrying MPEG2 is 3%, and the bandwidth of Gigabit Ethernet can reach 950Mbps.The development of DWDM technology can be so that Gigabit Ethernt progressively expands to 10Gigabit Ethernet.The switching equipment supplier of Ethernet is a lot, and the cost of IP/Ethernet backbone network progressively reduces.IP/Ethernet is easy to install, and administers and maintains, and is independent of head-end system.The characteristic of DWDM looped network also can be guaranteed professional effective operation.
According to method of the present invention, data services such as zone television government affairs column, news column, economic column, entertainment column, tourism column can with existing news program mixing, use the equipment of news program, do not need to acquire new equipment.Use the equipment of integrated form will greatly save fund, machine room space resources and electric power resource.
According to method of the present invention, after the professional IPization of broadcast video, switching performance by Ethernet makes any data flow directly be sent to any zone in the network, both be beneficial to the deployment expansion of network, also be beneficial to and in other network architectures and system, carry out resource-sharing, such as the Digital Television that realizes the IPTV mode in the wired bilateral network under disposing DOCSIS3.0 from now on.
According to method of the present invention, after the professional IPization of broadcast video, cable television operators may provide program to reach the hundreds of cover to the user.If whole programs all sends all cable TV subscribers in the mode of broadcasting, a large amount of frequency resources and Internet resources will be taken.Audience ratings wherein is transferred to all cable TV subscribers than higher channel in the mode of broadcasting, and the lower channel of some audience ratings is decided to be the switch type broadcasting channel, only be transferred to headend room or branch center headend room, just think to have the user to select certain switch type broadcasting channel, just be sent to the zone at this user place.By exchanging mechanism, the program request with the user of the regional program that transmits in the above example is changed.
Description of drawings
Fig. 1 simulated television platform Frequency mixing processing flow chart
Fig. 2 digital TV platform Frequency mixing processing flow chart
Fig. 3 digital television transfer private network platform schematic diagram
Fig. 4 zone television central site network figure
Fig. 5 radio frequency network figure
Embodiment
Digital television transfer private network platform project is integrated can former spot news platform, and former spot news program is sent to each zone television central machine room by the DWDM network, utilizes EdgeQAM equipment to receive, and its schematic diagram is seen Fig. 3.
At digi-TV centre machine room IP MUX equipment two in active and standby machine is arranged.At each branch center machine room, 1 switch is installed, 2 EdgeQAM, 4 low close modulation cards of every QAM configuration.Switch is used to receive the data of DWDM transmission, and with the EdgeQAM of data forwarding spot news.Zone television central site network deployment diagram such as Fig. 4
One, overall transfer scheme:
Each subregion television broadcast data concentrates in the digi-TV centre general headend to be handled, and each subregion television broadcast data is received and sneaks into then occur in each zone television central machine room, belongs to the transmission of typical distribution formula signal.The digi-TV centre machine room is multiplexed into data broadcasting on the TS code stream, in TS over IP mode, is sent to the regional center machine room by the DWDM network.Use IP Mux to carry out program multiplexing and IP transmission at front end, use EdgeQAM to carry out program reception and signal modulation in regional center.
After the unified processing of each zone television data broadcasting is multiplexed into one road TS stream like this, concentrate the IP MUX that is sent to headend room, each zone television data broadcasting is multiplexed on the TS code stream of each zone television news by IP MUX, be carried in the UDP/IP bag with original IP form simultaneously, be sent to each branch center by dedicated link again, use EdgeQAM to carry out program reception and signal modulation output in each branch center.
Two, front end data broadcast system:
1 road TS properties data broadcast system can broadcast the data of 38Mbps bandwidth at most.Broadcast the 4Mbps bandwidth calculation according to present regional government affairs information, can broadcast 7 cover government affairs informations at most and use, can satisfy the broadcast requirement in 7 districts.If need satisfy the broadcast requirement of each zone television platform of the whole city, then need to increase in addition the front end data broadcast system.
Three, front end IP MUX system:
At digi-TV centre machine room front end data broadcasting TS stream input IP MUX idle port, by IPMUX with each area data broadcasting multiplex to the TS code stream of spot news, and use the multicast mode to be packaged into UDP/IP output.
Four, zone television center program receives and modulating system:
In the zone television central machine room, mainly finish the reception of program and modulation, optical mixing process.
In the zone television central machine room, each the zone television program that adopts the EdgeQAM receiving front-end to send by multicast MultiCast is to finish the program transmission task at zone television center.
The output radiofrequency signal is carried out Frequency mixing processing before the translation network first order 815 amplifiers, do machine room the whole network signal and cover, and output level and translation signal output level after 216 radio frequency distributor Frequency mixing processing are consistent.The radio frequency network deployment diagram as shown in Figure 5
Five, entire system PSI/SI configuration requirement:
According to the whole characteristics of system, following requirement is arranged in the PSI/SI configuration of spot news program and area data broadcasting:
In the translation service platform, comprise description among the unified SI that sends to the TS at spot news program place, be frequency point information and the tabulation of the service channel among this TS of inclusion region news program TS in the NIT table that the whole network is unified in the translation zone, guarantee that the set-top box in the translation zone all can switch to the TS at spot news program place in each TS.
In broadcasting the TS at place, spot news program and area data transmit the SI of unified Definition, promptly comprise all in the NIT in TS and generate the frequency point information of TS and serve channel list, guarantee that the user also can switch to any one TS in the translation zone when watching the broadcasting of spot news program and area data by the translation service platform.The channel designation that defines in this TS also all is configured according to predefined mode with relevant programme information, generates standard compliant SDT, EIT and TDT/TOT (comprising the BAT that may need).
The SI structure that spot news program that the All Ranges television operating center issues and regional TS all are consistent, be that NIT, SDT, EIT and TDT/TOT (comprising the BAT that may need) all among these TS is all identical, just the programme content among the TS is different, but the pid parameter setting of all programs is all the same.Unified Definition and the requirement of configuration continuity by PSI/SI have realized the unified structure that realizes on distributed region.
Therefore in the core headend room, will in information on services generator (SIG) system, generate unified PSI/SI, and be multiplexed among each TS behind the input IP Mux.
Six, IP Mux parameter is provided with:
In IP MUX, need carry out multiplexingly to the input of different data broadcasting, guarantee that the MPTS of final output meets the configuration requirement of OCN Digital Television translation network.
The key parameter of output disposes:
| ServiceID | ServiceName | PMT PID | Video PID | Audio PID | Explanation |
| 1201 | QXW1 | 0x0081 | 0x0C10 | 0x0C13 | |
| 1202 | QXSJ |
Need to comprise basic PAT (PID is 0x0), CAT (PID is 0x1), NIT (PID is 0x10), SDT/BAT (PID is 0x11), EIT (PID is 0x12), TDT/TOT (PID is 0x14) table in addition.
By a shared cover PSI/SI table, can realize the zone television news program of each district's transmission and the consistency of TS on the PSI/SI level of all the other program datas broadcasting of zone television, guarantee to carry out unified logic with the Digital Television translation signal that transmits from the translation general headend.
Claims (8)
1, a kind of system and method for IP based network transmission region Digital Television.It is characterized in that,,, and realize the system and method for regional digital television broadcasting by IP backbone network transmitting digital TV signal in DVB overIP mode.
2, the system and method for a kind of IP based network transmission region Digital Television according to claim 1, it is characterized in that: data services such as zone television government affairs column, news column, economic column, entertainment column, tourism column can with existing news program mixing, use the equipment of news program, do not need to acquire new equipment.
3, the system and method for a kind of IP based network transmission region Digital Television according to claim 1, it is characterized in that: with the regional broadcast analog signal digital, carry out Frequency mixing processing at the digital television signal of general headend machine room and the whole network broadcasting together with this spot news, be transferred to each zone television central machine room then.
4, the system and method for a kind of IP based network transmission region Digital Television according to claim 1, it is characterized in that: according to the whole characteristics of system, in the PSI/SI configuration of spot news program and area data broadcasting, following requirement is arranged: in the translation service platform, comprise description among the unified SI that sends to the TS at spot news program place, be frequency point information and the tabulation of the service channel among this TS of inclusion region news program TS in the NIT table that the whole network is unified in the translation zone, guarantee that the set-top box in the translation zone all can switch to the TS at spot news program place in each TS.
5, the system and method for a kind of IP based network transmission region Digital Television according to claim 1, it is characterized in that: the SI that in spot news program and area data are broadcasted the TS at place, transmits unified Definition, promptly comprise all in the NIT in TS and generate the frequency point information of TS and serve channel list, guarantee that the user also can switch to any one TS in the translation zone when watching the broadcasting of spot news program and area data by the translation service platform.The channel designation that defines in this TS also all is configured according to predefined mode with relevant programme information, generates standard compliant SDT, EIT and TDT/TOT (comprising the BAT that may need).
6, a kind of TV program guide service system according to claim 1 and method is characterized in that: can support digital video programs to comprise seven days electronics programme informations (EIT Schedule) of today today backward.In seven days electronic program guides, the setting that can remind and pre-record program.When program is provided with prompting,, will ejects and remind the conflict prompting frame to supply user's selection if remind program to clash with having established.When setting is pre-recorded to program, and if establish the program of pre-recording and clash, the ejection conflict prompting frame of pre-recording is selected for the user.When pre-recording, can support the classification of pre-recording, will pre-record program storage in suitable classification.
7, a kind of TV program guide service system according to claim 1 and method is characterized in that: can support horse race lamp formula scrolling information bar, the issue important announcement.
8, a kind of TV program guide service system according to claim 1 and method is characterized in that: the user selects to want recorded program by checking program guide information, is set to pre-recording; The user is not provided with pre-recording, when seeing highlight, and can be by the function of real-time recording, program recording immediately.
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| CNA2008100376673A CN101588458A (en) | 2008-05-20 | 2008-05-20 | System and method of regional digital televisions based on IP network transmission |
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| CNA2008100376673A CN101588458A (en) | 2008-05-20 | 2008-05-20 | System and method of regional digital televisions based on IP network transmission |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102724573A (en) * | 2012-05-31 | 2012-10-10 | 江苏下一代广电网物联网研究中心有限公司 | Digital television personalized program selecting and sorting method |
| CN103152634A (en) * | 2013-03-04 | 2013-06-12 | 广东智慧家庭物联网科技有限公司 | Digital video broadcasting (DVB) digital television wireless household gateway system |
| CN103856808A (en) * | 2012-11-28 | 2014-06-11 | 中兴通讯股份有限公司 | Audio-and-video signal processing device, playing device, system and method |
| CN104754425A (en) * | 2013-12-27 | 2015-07-01 | 北京创维海通数字技术有限公司 | Method of transmitting unidirectional DVB (Digital Video Broadcasting) network signaling data in double-direction network |
| CN105025352A (en) * | 2015-07-21 | 2015-11-04 | 深圳市茁壮网络股份有限公司 | Digital television channel data packaging method and rapid searching method |
| RU2801143C1 (en) * | 2022-12-12 | 2023-08-02 | федеральное государственное автономное образовательное учреждение высшего образования "Московский физико-технический институт (национальный исследовательский университет)" | Method and system for generating multiprogram transport stream |
-
2008
- 2008-05-20 CN CNA2008100376673A patent/CN101588458A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102724573A (en) * | 2012-05-31 | 2012-10-10 | 江苏下一代广电网物联网研究中心有限公司 | Digital television personalized program selecting and sorting method |
| CN102724573B (en) * | 2012-05-31 | 2014-09-10 | 江苏省广电有线信息网络股份有限公司无锡分公司 | Digital television personalized program selecting and sorting method |
| CN103856808A (en) * | 2012-11-28 | 2014-06-11 | 中兴通讯股份有限公司 | Audio-and-video signal processing device, playing device, system and method |
| CN103152634A (en) * | 2013-03-04 | 2013-06-12 | 广东智慧家庭物联网科技有限公司 | Digital video broadcasting (DVB) digital television wireless household gateway system |
| CN104754425A (en) * | 2013-12-27 | 2015-07-01 | 北京创维海通数字技术有限公司 | Method of transmitting unidirectional DVB (Digital Video Broadcasting) network signaling data in double-direction network |
| CN104754425B (en) * | 2013-12-27 | 2018-01-16 | 北京创维海通数字技术有限公司 | A kind of transmission method of unidirectional DVB network signaling datas in bilateral network |
| CN105025352A (en) * | 2015-07-21 | 2015-11-04 | 深圳市茁壮网络股份有限公司 | Digital television channel data packaging method and rapid searching method |
| RU2801143C1 (en) * | 2022-12-12 | 2023-08-02 | федеральное государственное автономное образовательное учреждение высшего образования "Московский физико-технический институт (национальный исследовательский университет)" | Method and system for generating multiprogram transport stream |
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Open date: 20091125 |