CN111918100B - Remote area service coverage method based on ground digital television transmission network - Google Patents
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- 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
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
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- 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
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- 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
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
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- 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
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
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- 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
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
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- 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
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
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- H—ELECTRICITY
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- 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
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention relates to a remote area service coverage method based on a ground digital television transmission network, which comprises the following steps: step 1, converging broadcast television program streams, texts, pictures, files and other dynamic data into a transport stream; step 2, transmitting the data to a ground digital television transmitting station through a ground digital television transmission network; step 3, realizing wireless coverage transmission through a ground digital television transmitting station; step 4, transmitting the broadcast television program stream to a traditional DTMB receiving terminal for television playing; for texts, pictures, files and other dynamic data, the mobile intelligent terminal of the user realizes the acquisition of contents by using the service gateway. The invention combines the broadcast television technology and the mobile internet technology, and presents basic culture public service contents including broadcast programs, television programs, texts, pictures, files, data information and the like for the rural and herdsmen in remote areas on mobile intelligent terminals of the rural and herdsmen by utilizing a ground digital television wireless transmission network of the traditional broadcast television.
Description
Technical Field
The invention relates to the field of broadcast communication, in particular to a remote area service coverage method based on a ground digital television transmission network.
Background
The wireless ground digital television is convenient to operate from the beginning and provides high-quality public broadcast television service for vast farmers and herdsmen in remote areas of inner Mongolia. With the development of society, people receive audio and video programs through mobile intelligent terminals such as mobile phones and pads in an explosive growth mode, the method for receiving audio and video occupies an important position in young people, more and more middle-aged and old people listen to and watch the audio and video programs through the mobile intelligent terminals, and the mobile intelligent terminals of farmers and herdsmen in remote areas of inner Mongolia are more and more reserved.
The infrastructure of remote areas of inner Mongolia is weak, and because the conventional mobile communication network access level is low due to rare people, the access of a large-bandwidth mobile network is difficult to realize based on the consideration of cost and benefit, and a broadcast television wireless coverage network based on public service is a main way for receiving external information. At present, a channel for transmitting the mainstream media information is lacked in remote areas, and the mainstream media information coverage cannot be realized.
Disclosure of Invention
In order to solve the technical problems, the invention provides a remote area service coverage method based on a ground digital television transmission network, which is used for providing manageable and controllable media and information transmission modes by combining a wireless ground digital television transmission network to serve rural areas and pastoral areas in remote areas of inner Mongolia, fully utilizes radio coverage resources of a broadcast television, and leads mainstream media and mainstream information to enter a mobile intelligent terminal and enter a mobile terminal of a mobile and resident farmer and pastoral people, thereby realizing the presentation of basic culture public service contents on the mobile intelligent terminal and further expanding the influence and coverage of the mainstream media.
The technical scheme of the invention is as follows: a remote area service coverage method based on a ground digital television transmission network is characterized by comprising the following steps:
step 1, converging a broadcast television program stream and text, pictures, files and other dynamic data into a transmission stream, wherein the text, the pictures, the files and the other dynamic data comprise: local news, electronic books and periodicals, agricultural and livestock product prices, government announcements, working guide, weather service and disaster early warning information;
step 2, the transmission stream is transmitted to a ground digital television transmitting station through a ground digital television transmission network;
step 3, the ground digital television transmitting station realizes wireless coverage transmission through the ground digital television transmitting station;
step 4, transmitting the broadcast television program stream to a traditional DTMB receiving terminal for television playing; for texts, pictures, files and other dynamic data, the mobile intelligent terminal of the user utilizes the service gateway to achieve content acquisition, and the system is compatible with audio and video receiving of the traditional ground digital television.
Further, in the step 1, when the TS transport stream is multiplexed, only the data information corresponding to the non-broadcast television content needs to be encapsulated and multiplexed to the original transport stream, without any modification to the content of the original broadcast television program stream, any modification to the original broadcast television broadcasting system, and no modification to the original program transmission network and the overlay network.
Further, the transmission protocol of the transport stream is as follows: based on the one-way transmission characteristic of the ground digital television wireless transmission network, in the transmission process, texts, pictures, files and dynamic data contents need to be packed into TS transmission streams in a data payload mode to be used as non-broadcast television program streams, and the non-broadcast television program streams are multiplexed with the broadcast television program streams and transmitted to a ground digital television transmitting station through the ground digital television transmission network for transmission; the non-broadcast television program stream distributes extra PID codes according to different sources and types, programs PID in the system is planned, after 7000 PID numbers are reserved for non-broadcast television program information, 7000-7049PID numbers are used for transmitting text information, 7050-7099PID numbers are used for transmitting picture information, 7100-7149PID numbers are used for transmitting file information, 7150-7199 for transmitting dynamic data information, the rest are used for system reservation, and the packaging mode is that the corresponding format information is completely packaged into the TS stream and corresponds to a file analysis protocol in a service gateway.
Further, in the step 4, the service gateway receives corresponding data according to the frequency point of the terrestrial digital television, demodulates the DTMB radio signal into TS data stream, performs UDP encapsulation according to a predetermined PID code and packaging method, then performs parsing and format conversion on the UDP data to meet the format requirement of the service required by the user, and finally transmits the text image and video information to the mobile intelligent terminal through WiFi by using the system service.
Further, the broadcast television program content and the non-broadcast television content are treated differently: carrying out UDP packet target address conversion on the broadcast television program stream and then directly forwarding the broadcast television program stream; and analyzing the non-broadcast television content to finish the recovery of texts, pictures, files and dynamic data, storing the recovered data in a service gateway, and providing file service which can be downloaded and used by the terminal for the service gateway.
Further, the service built in the service gateway transmits IP-encapsulated broadcast television program streams and useful information such as texts, pictures, files, data and the like to the mobile intelligent terminal through WiFi, and farmer and herder users watch and browse files by using APP audio and video programs on the intelligent terminal; the APP and the service in the service gateway form a C/S data access mode;
the system transmits the APP with the latest version to the service gateway in a file form by using a transmission network, and the APP downloading and updating service is simultaneously established in the service gateway, so that a farmer and herdsman user can have the APP with the latest version at the first time without the access of the Internet.
Has the advantages that:
1. wide coverage area
The existing terrestrial digital television in remote areas is mainly covered by adopting a 1kw transmitter for transmission and a low-power transmitter for point compensation. The 1kw transmission power is far higher than that of a general communication base station, the VHF and UHF frequency bands with lower frequency are adopted, and the broadcast television transmission station is generally on a mountain and has a higher broadcast television iron tower, so that the coverage range is quite considerable, the wireless digital terrestrial television in our district covers 1031.85 million people in the rural television comprehensive coverage population in 2018, and the coverage rate is 98.71%.
2. Low covering cost
The coverage cost per unit area of broadcast television is much lower than that of mobile communication networks. The service gateway can be distributed only according to needs, and the distribution is carried out according to the specific needs of families or villages in a targeted mode.
3. System safety and stability
The safe broadcasting of the broadcast television program is a lifeline, the 'zero second' stop broadcasting of the system is ensured by various technical means, a very safe and stable program transmission coverage network is formed in the practice of broadcasting television for many years, and the availability of the broadcast television transmission network is higher than that of a common civil communication network, so that the stability of a signal source can be better ensured. The unidirectional transmission network is closed, and the system cannot be invaded and damaged through the user side. The system user service is provided by the service gateway, mainly facing rural and pastoral users, and the user concurrency number does not have large fluctuation and is difficult to generate super-concurrency. Even if the normal use of the single service gateway is influenced by the network attack, other service gateways cannot be influenced because no information is mutually transmitted between the service gateways.
4. Rich information
The system can make the ground digital television wireless transmission network not only provide video and audio for wide masses of farmers and herds, but also provide various rich and colorful media-melting materials and information about own interests.
Drawings
FIG. 1: the method of the invention has an overall process;
FIG. 2 is a schematic diagram: the invention provides a data processing flow in a service gateway;
FIG. 3: the system service processing flow of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the system of the present invention integrates a traditional broadcast television program stream and text, pictures, files and other dynamic data including local news, electronic books and periodicals, farm and livestock product prices, government announcements, office guides, weather services, disaster warnings and other information relevant to the minds and herdsmen into a transport stream, transmits the transport stream to a ground digital television transmitting station through a transmission network, and realizes a wide-range wireless coverage through a high-power ground digital television transmitting station, a mobile intelligent terminal of a user finally realizes content acquisition by using a service gateway, the system is compatible with audio and video reception of the traditional ground digital television, an original ground digital television set-top box can still normally listen to and watch an original television program without any modification, the overall flow is shown in fig. 1, and specifically includes the following steps:
step 1, converging a broadcast television program stream and text, pictures, files and other dynamic data into a transmission stream, wherein the text, the pictures, the files and the other dynamic data comprise: local news, electronic books and periodicals, agricultural and livestock product prices, government announcements, working guide, weather service, disaster early warning and other information.
Step 2, transmitting the data to a ground digital television transmitting station through a ground digital television transmission network;
step 3, the ground digital television transmitting station realizes wireless coverage transmission through the ground digital television transmitting station;
step 4, transmitting the broadcast television program stream to a traditional DTMB receiving terminal for television playing; for texts, pictures, files and other dynamic data, the mobile intelligent terminal of the user utilizes the service gateway to realize the acquisition of contents, and the system is compatible with the audio and video reception of the traditional terrestrial digital television.
In the step 1, when the TS transport stream is multiplexed, the content of the original broadcast television program stream is not modified, the original broadcast television broadcasting system is not modified, the original program transmission network and the overlay network are not modified, and only the data information corresponding to the non-broadcast television content needs to be subjected to TS transport stream encapsulation and multiplexed to the original transport stream.
The transmission protocol of the transmission stream is as follows: based on the one-way transmission characteristic of the wireless transmission network of the terrestrial digital television, the conventional interactive file transmission protocol based on reliable connection cannot be used for realizing the file receiving and the streaming data receiving. In the transmission process, contents such as texts, pictures, files, dynamic data and the like need to be packed into a TS transmission stream in a data payload mode, and the contents can be multiplexed with the original program stream and transmitted through a transmitter. Distributing additional PID codes for non-broadcast TV program stream according to different sources and types, overall planning program PID in the system, reserving the PID numbers after 7000 for non-broadcast TV program information, 7000-7049PID numbers for transmission text information, 7050-7099PID numbers for transmission picture information, 7100-7149PID numbers for transmission file information, 7150-7199 for transmission dynamic data information, and the rest as system reservation, completely packaging the corresponding format information into TS stream payload, corresponding to the file resolution protocol in the service gateway.
In the step 4, in order to realize the display of the mobile intelligent terminal of the broadcast television program, the character and picture information and the like, the service gateway is added in the system, is an important core for realizing the access of the system, and provides related content analysis for the display of the mobile intelligent terminal of the audio and video code stream and the character and picture information so as to adapt to the final content presentation. Referring to fig. 2, the service gateway receives corresponding data according to a frequency point of a terrestrial digital television, demodulates a DTMB wireless signal into a TS data stream, performs UDP encapsulation according to a predetermined PID code and a packaging method, then performs parsing and format conversion on UDP data to meet a format requirement of a service required by a user, and finally transmits text, pictures and video information to the mobile intelligent terminal through WiFi by using a system service, wherein a specific service flow is shown in fig. 2.
Considering that although farmers and herdsmen have mobile intelligent terminals, the processing performance of the mobile intelligent terminals is generally not very high and the storage space is limited, the characteristics of streaming broadcast television programs and the characteristics of static files of non-broadcast television programs are integrated, the system service adopts a computer processing mode to treat the broadcast television programs and the non-broadcast television programs differently: the broadcast television program stream is directly forwarded after being subjected to proper UDP packet target address conversion; the non-broadcast television content is analyzed to complete the recovery of texts, pictures, files and dynamic data and is stored in the service gateway, and file services which can be downloaded and used by the terminal are provided for the non-broadcast television content, and the system service processing flow is shown in fig. 3.
Furthermore, when the system receives data, as the non-broadcast television program stream is completely organized according to the TS transport stream specification, the original DTMB set top box can still normally receive programs, and only newly added non-broadcast television content cannot be decoded, so that the broadcast television program watching of the original user cannot be influenced.
The service built in the service gateway transmits IP-encapsulated broadcast television program streams and useful information such as texts, pictures, files, data and the like to the mobile intelligent terminal through WiFi, and farmers and herdsmen use APP audio and video programs on the intelligent terminal to watch and browse files. The APP and the service in the service gateway form a data access mode of the C/S. The system transmits the APP with the latest version to the service gateway in a file form by using a transmission network, and the APP downloading and updating service is simultaneously established in the service gateway, so that a farmer user can have the APP with the latest version at the first time without the access of the Internet.
Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, but various changes may be apparent to those skilled in the art, and it is intended that all inventive concepts utilizing the inventive concepts set forth herein be protected without departing from the spirit and scope of the present invention as defined and limited by the appended claims.
Claims (1)
1. A remote area service coverage method based on a ground digital television transmission network is characterized by comprising the following steps:
step 1, converging a broadcast television program stream and text, pictures, files and other dynamic data into a transmission stream, wherein the text, the pictures, the files and the other dynamic data comprise: local news, electronic book and periodical, agricultural and livestock product price, government bulletin, work guide, weather service and disaster early warning information; in the step 1, when the TS transport stream is multiplexed, only the data information corresponding to the non-broadcast television content needs to be subjected to TS transport stream encapsulation and multiplexed to the original transport stream, without any modification to the original broadcast television program stream content, any modification to the original broadcast television broadcasting system, and no modification to the original program transmission network and overlay network;
step 2, the transmission stream is transmitted to a ground digital television transmitting station through a ground digital television transmission network; the transmission protocol of the transmission stream is as follows: based on the one-way transmission characteristic of the ground digital television wireless transmission network, in the transmission process, texts, pictures, files and dynamic data contents need to be packed into TS transmission streams in a data payload mode to be used as non-broadcast television program streams, and the non-broadcast television program streams are multiplexed with the broadcast television program streams and transmitted to a ground digital television transmitting station through the ground digital television transmission network for transmission; the method comprises the steps that extra PID codes are distributed to non-broadcast television program streams according to different sources and types, program PIDs in a system are planned, after 7000 PID numbers are reserved for non-broadcast television program information, 7000-7049PID numbers are used for transmitting text information, 7050-7099PID numbers are used for transmitting picture information, 7100-7149PID numbers are used for transmitting file information, 7150-7199 are used for transmitting dynamic data information, the rest are used for reserving the system, and the packaging mode is that corresponding format information is completely packaged into TS streams and corresponds to a file analysis protocol in a service gateway;
step 3, the ground digital television transmitting station realizes wireless coverage transmission through the ground digital television transmitting station;
step 4, transmitting the broadcast television program stream to a traditional DTMB receiving terminal for television playing; for texts, pictures, files and other dynamic data, the mobile intelligent terminal of the user utilizes the service gateway to realize the acquisition of contents, and the system is compatible with the audio and video reception of the traditional ground digital television; the system service adopts a computer processing mode to distinguish the contents of the broadcast television programs and the non-broadcast television programs by integrating the characteristics of the streaming transmission of the broadcast television programs and the characteristics of the static files of the non-broadcast television programs: converting the destination address of the broadcast television program stream into a proper UDP packet and then directly forwarding the converted destination address; analyzing the non-broadcast television content to complete the recovery of texts, pictures, files and dynamic data and storing the recovered texts, pictures, files and dynamic data in a service gateway;
in the step 4, the service gateway receives corresponding data according to the frequency points of the terrestrial digital television, demodulates the DTMB wireless signals into TS data streams, performs UDP encapsulation according to a predetermined PID code and packaging mode, then performs analysis and format conversion on UDP data to meet the format requirements of services required by users, and finally transmits text, pictures and video information to the mobile intelligent terminal by using system services through WiFi;
the built-in service of the service gateway transmits the IP-encapsulated broadcast television program stream, text, pictures, files and dynamic data to the mobile intelligent terminal through WiFi, and a farmer and herd user watches and browses files by using APP audio and video programs on the intelligent terminal; the APP and the service in the service gateway form a C/S data access mode;
the system transmits the APP with the latest version to the service gateway in a file form by using a transmission network, and the APP downloading and updating service is simultaneously established in the service gateway, so that a farmer and herdsman user can have the APP with the latest version at the first time without the access of the Internet.
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| CN202010783783.0A CN111918100B (en) | 2020-08-06 | 2020-08-06 | Remote area service coverage method based on ground digital television transmission network |
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| CN202010783783.0A CN111918100B (en) | 2020-08-06 | 2020-08-06 | Remote area service coverage method based on ground digital television transmission network |
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| CN108965997B (en) * | 2018-07-06 | 2019-09-17 | 刘雅芸 | Stream media live broadcasting method and device based on mobile vulnerable network environment |
| CN109327706A (en) * | 2018-10-10 | 2019-02-12 | 广东省南方数字电视无线传播有限公司 | Programme televised live signal acceptance method and system based on DTMB |
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