CN104349218B - Terrestrial DTV two-way interaction VOD system - Google Patents

Terrestrial DTV two-way interaction VOD system Download PDF

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Publication number
CN104349218B
CN104349218B CN201410543378.6A CN201410543378A CN104349218B CN 104349218 B CN104349218 B CN 104349218B CN 201410543378 A CN201410543378 A CN 201410543378A CN 104349218 B CN104349218 B CN 104349218B
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dtmb
broadcasting
user
program
headend
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CN104349218A (en
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汤志刚
秦立伟
李伟
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汤志刚
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network 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 
    • H04N21/61Network physical structure; Signal processing
    • H04N21/6106Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6112Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21Server components or server architectures
    • H04N21/222Secondary servers, e.g. proxy server, cable television Head-end
    • H04N21/2225Local VOD servers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/4104Peripherals receiving signals from specially adapted client devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/426Internal components of the client ; Characteristics thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network 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 
    • H04N21/61Network physical structure; Signal processing
    • H04N21/6106Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet

Abstract

Terrestrial DTV two-way interaction VOD system, relate to broadcast television transmissions lift-off technology and mobile Internet communication technology, especially belong to a set of terrestrial DTV user by development of Mobile Internet technology reading, predetermined, demand TV program, it is possible in home television set, watch the system of institute's request program.Including user side, the Internet, broadcasting and TV website portal platform, CND network, DTMB sub-headend, described user side has terrestrial digital television set box, television set and mobile communication equipment, mobile communication equipment passes through linking Internet broadcasting and TV website portal platform, broadcasting and TV website portal platform is connected digital TV data center IDC, IDC and is coupled with DTMB sub-headend by CND network;DTMB sub-headend is made up of edge video server, IP TS conversion duplexer, DTMB modulation transmitter, transmitting antenna, has convenient intelligence, makes life be rich in the good effect of enjoyment.

Description

Terrestrial DTV two-way interaction VOD system
Technical field
The present invention relates to broadcast television transmissions lift-off technology and mobile Internet communication technology, especially belong to a set of ground Digital cable customers is read by development of Mobile Internet technology, predetermined, demand TV program, it is possible to watch institute in home television set The system of request program.
Background technology
Under the overall background of the integration of three networks, the developing direction of nearly all prediction TV is two-way interaction, at cable television In system, two-way interaction point multicast function has been carried out, and wireless terrestrial DTV unidirectional, broadcast type can not realize always This function.To this, many people are made that the biggest exploration and effort, and this problem was the most once listed in " 863 " plan by country, but arrived The most do not see the success on practical engineering value now.
In recent years, along with the Rapid Popularization of DTMB GB, China's terrestrial DTV (DTMB) quickly grew;Cabled digital WIFI and the 3G/4G technology of TV bidirectional applications and telecommunications industry is the most ripe, is widely used.This is that people are effective Ground solves terrestrial DTV two-way interaction program request problem and provides technical foundation, but difficulty is the biggest, technical difficult points It is: 1, the down transmitting power of wireless terrestrial DTV (DTMB) transmitting station is general very big, with up of TV user Penetrating power cannot be symmetrical, i.e. ascending power is unable to reach practical level.2, two-way space in the range of radio and television frequency planning Spectrum congestion, it is difficult to plan.3, each architectonical of terrestrial DTV, cable digital TV and Internet communication technology, standard is mutual Disunity, it is difficult to merge.4, the content distributing network in the typically no Cable Digital TV Network of terrestrial digital television system and Its IP carries private network.5, current DTMB transmitting station major part is all located at TV and Radio Service of below county, and these transmitting stations are both without program request Program source, also cannot be connected with request program origin system.6, TV and Radio Service all it is located in China's current DTMB system, it is impossible to straight Connect and obtain request program content and the information of TV in CATV network company front end system in succession.
Summary of the invention
Present invention is primarily targeted at a kind of novel terrestrial DTV two-way interaction VOD system of offer, to reach Effectively solve current terrestrial DTV user and cannot be carried out the purpose of two-way interaction program request.
For reaching above-mentioned purpose, terrestrial DTV two-way interaction VOD system provided by the present invention, it is characterised in that Including user side, the Internet, broadcasting and TV website portal platform, CND network, DTMB sub-headend, described user side has ground number Word TV set-top box, television set and mobile communication equipment, mobile communication equipment passes through linking Internet broadcasting and TV website portal platform, Broadcasting and TV website portal platform is connected digital TV data center IDC, IDC and is coupled with DTMB sub-headend by CND network;D TMB sub-headend is made up of edge video server, IP-TS conversion duplexer, DTMB modulation transmitter, transmitting antenna.
The job step of said system includes:
Step 1), utilized client end AP P on mobile communication equipment by terrestrial DTV user, pass through mobile Internet Communication network access specific radio and television website;
Step 2), the broadcasting and TV website portal platform of above-mentioned radio and television website connect digital TV data center IDC, IDC The programme content TS of user's program request is flowed and user profile is packaged into IP packet, be pushed to belonging to a broadcasting user through CDN The broadcasting and TV DTMB secondary front end of overlay area;
The IP packet that step 3), DTMB sub-headend are received carries out code stream and keeps in, changes and after multiplexing, be pushed to The modulation transmitter modulate emission of DTMB front end;
Step 4), the transmitting emitted antenna of signal are sent to the STB terminal of a broadcasting user, after Set Top Box reception, decoding Audio frequency and video AV signal or HDMI signal are delivered to television set viewing.
Wherein, mobile device can include mobile phone, panel computer or PC etc., and described APP is mobile phone, flat board electricity The application that brain or PC customization are downloaded, is used for browsing g.TV program abstract and programme, request program or information, net Upper paying.
Described mobile Internet communication network is WIFI or 3G/4G etc..
Described specific radio and television website is taken for utilizing original provincial, and municipal level radio and television website or Network TV Station The broadcasting and TV website portal platform built, broadcasting and TV website portal platform is one group of server, its function be user manage, service content point Broadcast subscription, information read, charging and other value-added service service.
Described broadcasting and TV website portal platform uses constructed by HTML5 technology, it can accomplish for user mobile phone or The automatic adaptation of IPAD screen.
Described programme content TS stream refer to the VOD front-end processing system in IDC by the video-audio program of user's program request, H.264 or H.265 use or AVS+ coded system carries out encoding or be recoded into after transcoding to flow (Transport into TS Stream), programme content TS stream adds user profile and TCP/IP packet header just becomes IP packet.
Described CDN refers to a CDN (Content Delivery built with two-stage networking model Network) content distributing network, as the system that it uses with existing cable digital TV, mainly has contents construction, content The systems such as distribution, content storage and Content Management are constituted.
Described two-stage networking model one-level is data center IDC(Centroid CRD), another level is broadcasting and TV DTMB at county level Sub-headend (child node CSG), its mode of connection is Leased line, private network or the Internet;Mainly undertake contents construction, content is divided Send out function: CRD and distribute CSG child node, CSG child node adaptation IP data according to the identifier RegionID of Set Top Box region Bag is to code stream conversion and multiplexing port (GbE).Here CSG child node answers configured in advance basic frequency, maximum code stream (to be set to The parameter such as 32Mbps).
Described code stream is kept in as providing the storage to IP packet (conventional popular program) with an edge video server Deposit and forward.
Described change similar with multiplexing into the edge modulator (IPQAM) in Cable Digital TV Network, the most only adopt By the conversion of its code stream and multiplexing part, remove QAM modulation part, be to the IP packet from CSG child node, complete IP packet header Deblocking, solution is separated by decantation to the SPTS code stream TS of the single order request (stream), the SPTS stream of multiple order request is multiplexed into many Program transport streams (MPTS), and MPTS is fitted into DTMB modulation transmitter.
Described DTMB modulation transmitter is emitted as using the 64QAM modulation transmitter of DTMB GB or higher order QAM to adjust Transmitter processed.The 64QAM modulation system of each 8MHz bandwidth channel, its effective code flow rate is 32.486Mbps.
Described Set Top Box is terrestrial digital television set box, and it can redirect after receiving request program signal automatically To program-on-demand channel, through frequency reducing, demodulate, decode, generate audio frequency and video AV signal or HDMI signal send television set to watch, it is achieved that Request program on terrestrial DTV user network, the purpose of home television set viewing request program.
Present invention application development of Mobile Internet technology accesses, content distributing network technology (CDN) transmits and terrestrial DTV (DTMB) method that technology is launched and received, it is achieved that terrestrial DTV user passes through the mobile device such as mobile phone or panel computer The purpose of the program of program request is watched in online request program, home television set, has convenient intelligence, makes life be rich in the positive of enjoyment Effect.
Accompanying drawing explanation
Fig. 1, Broadcast and TV system DTMB two-way interaction program request schematic diagram.
Detailed description of the invention
As shown in drawings, terrestrial DTV two-way interaction VOD system provided by the present invention, including user side, interconnection Net, broadcasting and TV website portal platform, CND network, DTMB sub-headend, described user side has terrestrial digital television set box, electricity Depending on machine and mobile communication equipment, mobile communication equipment passes through linking Internet broadcasting and TV website portal platform, and portal platform is arranged mutually Networking fire wall, broadcasting and TV website portal platform connects digital TV data center IDC, IDC by CND network and DTMB sub-headend Couple;DTMB sub-headend by edge video server, IP-TS conversion duplexer, DTMB modulation transmitter, send out Penetrate antenna to constitute.
The job step of terrestrial DTV two-way interaction VOD system provided by the present invention includes the following:
Step 1), utilized client end AP P on mobile communication equipment by terrestrial DTV user, pass through mobile Internet Communication network access specific radio and television website;Described mobile Internet communication network is WIFI or 3G/4G;
Step 2), the broadcasting and TV website portal platform of above-mentioned radio and television website connect digital TV data center IDC, IDC The programme content TS of user's program request is flowed and user profile is packaged into IP packet, be pushed to belonging to a broadcasting user through CDN The broadcasting and TV DTMB secondary front end of overlay area;
The IP packet that step 3), DTMB sub-headend are received carries out code stream and keeps in, changes and after multiplexing, be pushed to The modulation transmitter modulate emission of DTMB front end;
Step 4), the transmitting emitted antenna of signal are sent to the STB terminal of a broadcasting user, after Set Top Box reception, decoding AV signal or HDMI signal are delivered to television set viewing.
Described client end AP P be customize one of download in the mobile devices such as mobile phone, panel computer or PC should With, it is used for browsing g.TV program abstract and programme, request program or information, paying on the net.User and the information of website docking Being only that information is shown and service selection, flow is the least.
In described step 1, specific radio and television website is for utilizing original provincial, and municipal level and above broadcasting and television network Standing or broadcasting and TV website portal platform that TV in CATV network company is built, broadcasting and TV website portal platform is one group of server, its merit Can be user behavior analysis and commending contents, user self-help inquiry, service content program request subscription, information read, charging and other Value-added service services;Portal website's platform, as the Rendezvous Point of information, externally connects the Internet, collects and arrange the Internet letter Breath.Internally docking user behavior analysis system and content recommendation system, simultaneously docking digital TV data center IDC.User's row For the user's management in analysis system and content recommendation system on the one hand docking digital TV data center IDC and VOD etc. it is System, obtains user behavior data, on the other hand feeds back to user by calculating the personalized recommendation information produced, thus to debarkation net The user stood provides customization content recommendation service.Broadcasting and TV website portal platform uses constructed by HTML5 technology, and it can do To for user mobile phone or the automatic adaptation of IPAD screen, because HTML5 is for the Mobile operating system such as Android or iOS There is fairly perfect solution, the good compatibility of website platform and user terminal can be accomplished, it is ensured that access quality.Best Use Provincial Broadcast Television website or Network TV Station, because they typically have video request program resource and the program request ability of abundance, and Provincial typically has TV storage center or IPTV front end system, and this is all ready-made data center IDC, can directly utilize.
Described digital TV data center IDC is the front-end processing system of VOD (Video On Demand);VOD (Video On Demand) front-end processing system is to provide user's program, be managed and the set of system of charging etc., including Video server, disk array, program are play and control the systems such as equipment, program database, network management and charging.
The process that the programme content of user's program request and user profile are packaged into IP packet is referred to by described IDC: in IDC VOD front-end processing system by the video-audio program of user's program request, H.265 or AVS+ coded system is compiled use H.264 or It is recoded into after code or transcoding flowing (Transport Stream) into TS, adds user profile and TCP/IP packet header becomes IP number According to bag.
Described CDN refers to a CDN (Content Delivery built with two-stage networking model Network) content distributing network, as the system that it uses with existing cable digital TV, mainly has contents construction, content The systems such as distribution, content storage and Content Management are constituted;Described two-stage networking model one-level is data center IDC, its center Node is CRD, and another level is broadcasting and TV DTMB sub-headend at county level, and its child node is CSG, and two-stage networking model mode of connection is data Special line, private network or the Internet.
Described two-stage networking model is made up of Centroid CRD and child node CSG, undertakes contents construction, content distribution Function: CRD distributes CSG child node, CSG child node adaptation IP data according to the identifier RegionID of Set Top Box region Bag is to code stream conversion and multiplexing port (GbE).Here CSG child node answers configured in advance basic frequency, maximum code stream (to be set to here The parameter such as 32Mbps).
Described code stream is kept in as providing the storage to IP packet and forwarding, mainly with an edge video server Store nearby and forward conventional popular program.
Described change similar with multiplexing into the edge modulator (IPQAM) in Cable Digital TV Network, the most only adopt By the conversion of its code stream and multiplexing part, remove QAM modulation part, be to the IP packet come via CSG child node, complete IP bag The deblocking of head, solution is separated by decantation to SPTS code stream (the TS stream of single order request), the SPTS stream of multiple order request is multiplexed into MPTS (MPTS), and MPTS is fitted into DTMB modulation transmitter.
Described DTMB modulation transmitter is emitted as using the 64QAM modulation transmitter of DTMB GB, each 8MHz bandwidth The 64QAM modulation of channel, its effective code flow rate is 32.486Mbps.The transmitting power of DTMB modulation transmitter and transmitting aerial system System should be identical with original DTMB emission system, and the frequency that tranmitting frequency configures with CSG child node is consistent.
Described Set Top Box need to carry out upgrading adaptation to original terrestrial digital television set box, is allowed to receiving program request During programme information, automatic jump to program-on-demand channel, through frequency reducing, demodulate, decode, generate audio frequency and video AV signal or HDMI signal Television set is sent to watch.
In charge accounting, website can utilize third party's settlement platforms such as Alipay, can accomplish user's net answer system Program, online paying, the business experience of television-viewing, such that it is able to solve charge accounting problem well.
Present invention application development of Mobile Internet technology accesses, content distributing network technology (CDN) transmits and terrestrial DTV (DTMB) method that technology is launched and received, it is achieved that terrestrial DTV user passes through the online request program of mobile device, family The purpose of the program of front yard television set viewing program request.

Claims (5)

1. a terrestrial DTV two-way interaction VOD system, including user side, the Internet, broadcasting and TV website portal platform, CND Network, DTMB sub-headend, described user side has terrestrial digital television set box, television set and mobile communication equipment, mobile Communication equipment passes through linking Internet broadcasting and TV website portal platform, and broadcasting and TV website portal platform connects digital TV data center IDC, IDC are coupled with DTMB sub-headend by CND network;DTMB sub-headend is multiple by edge video server, IP-TS conversion With device, DTMB modulation transmitter, launch antenna composition, it is characterised in that user utilizes client end AP P by terrestrial DTV, By mobile Internet communication network access specific radio and television website;The broadcasting and TV website portal of above-mentioned radio and television website is put down Platform connects digital TV data center IDC, IDC and programme content TS stream and the user profile of user's program request is packaged into IP data Bag, is pushed to the broadcasting and TV DTMB sub-headend of overlay area belonging to a broadcasting user through CDN;The IP that DTMB sub-headend is received Packet carries out code stream to be kept in, changes and after multiplexing, be pushed to the modulation transmitter modulate emission of DTMB front end;Signal is emitted Antenna is sent to the STB terminal of a broadcasting user, after Set Top Box reception, decoding, AV signal or HDMI signal is delivered to television set;
Above-mentioned broadcasting and TV website portal platform is one group of server, and its function includes: user's management, content-on-demand are subscribed to, information Reading, charging and other value-added service service.
Terrestrial DTV two-way interaction VOD system the most according to claim 1, is further characterized in that, described broadcasting and TV Website portal platform is for using constructed by HTML5 technology.
Terrestrial DTV two-way interaction VOD system the most according to claim 1, is further characterized in that, described program Content TS stream refer to the VOD front-end processing system in IDC by the video-audio program of user's program request, use H.264 or H.265 or AVS+ coded system carries out encoding or be recoded into after transcoding to flow into TS.
Terrestrial DTV two-way interaction VOD system the most according to claim 1, is further characterized in that, described DTMB Modulation transmitter is emitted as using 64QAM modulation transmitter or the higher order QAM modulation transmitter of DTMB GB.
Terrestrial DTV two-way interaction VOD system the most according to claim 1, is further characterized in that, described machine top Box is terrestrial digital television set box, and it can automatic jump to program-on-demand channel after receiving request program signal, through fall Frequently, demodulate, decode, generate audio frequency and video AV signal or HDMI signal send television set to watch, it is achieved that terrestrial DTV user network Upper request program, the purpose of home television set viewing request program.
CN201410543378.6A 2014-10-15 2014-10-15 Terrestrial DTV two-way interaction VOD system Active CN104349218B (en)

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CN108768675A (en) * 2018-04-27 2018-11-06 佛山市日日圣科技有限公司 A kind of packet information packet transmission method and device
CN109246485A (en) * 2018-10-17 2019-01-18 广东省南方数字电视无线传播有限公司 Programme televised live signal transmitting method and system based on DTMB
CN110337004B (en) * 2019-07-08 2021-01-19 西安交通大学 Television program transmission method and system

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