CN103533385A - Method for realizing intelligent emergency broadcast on ground digital television system - Google Patents
Method for realizing intelligent emergency broadcast on ground digital television system Download PDFInfo
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- CN103533385A CN103533385A CN201210226053.6A CN201210226053A CN103533385A CN 103533385 A CN103533385 A CN 103533385A CN 201210226053 A CN201210226053 A CN 201210226053A CN 103533385 A CN103533385 A CN 103533385A
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Abstract
The present invention discloses intelligent emergency broadcast on a ground digital television system, and provides an innovation based on the original ground digital system, which comprises software innovation, hardware innovation and structure innovation. Emergency information sound source input is added at the front end of the ground digital television, and an emergency TS stream is obtained through coding multiplexing. Various parameters of the emergency TS stream are acquired, such as frequency point and corresponding audio/video PID in the emergency TS stream. The parameters are edited to private data and are inserted into a first layer of cycle in NIT and are multiplexed with various programs. Broadcasting is performed after modulation and mixing. A ground digital television set-top-box is mainly innovated on a terminal. The functions of machine enlargement and true standby are added for expanding software, hardware and structure functions. Intelligent emergency broadcast is realized according to matching between a specific protocol and a front-end flow. The method of the invention is advantageous in that: convenient and concise operable front-end software is innovated; corresponding terminal software, matching terminal hardware for realizing emergency use and terminal structure are designed; the innovation breaks through limitless in the traditional ground digital television, so that the ground digital television can perform a common television broadcast function and furthermore realizes emergency broadcast for reducing life and property loss of the people.
Description
Technical field
The present invention relates to digital audio, video technique field, or rather, relate to the application that terrestrial digital television system technology and broadcast village village acoustic system technology combine.
Background technology
Existing background technology is mainly terrestrial digital television system technology, and the following standard of Main Basis is developed:
" terrestrial DTV networking planning ";
" colourcast nerve of a covering technical stipulation ";
" radio and television optical cable backbone SDH (Synchronous Digital Hierarchy) (SDH) coffret standard ";
" the universal coding first system of information technology moving image and sound information thereof ";
" digital terrestrial television transmission system frame structure, Channel Coding and Modulation ";
" specification requirement of ground digital television broadcast single frequency adapter and method of measurement ".
Existing terrestrial digital television system is mainly realized following functions:
1, basic rating service: allow user can watch basic digital television program;
2, essential information service: allow user understand policy, the policy of party and the road that some are got rich; Be mainly reflected in the handy services for the people such as news flash, road administration news flash, weather news flash, public transport news flash;
3, basic order program service: allow user according to own some sponsored programs of demand program request, as: film, physical culture etc.
The realization of terrestrial digital television system is mainly comprised of digital front-end and terminal.Digital front-end mainly wraps: draw together encoder, multiplexer, modulator, Bit allocation device, CAS, SMS server, blender, the network switch; Ground digital front end system schematic diagram as shown in Figure 1.
Digital TV terminal mainly refers to ground digital Set Top Box (without intelligent emergent broadcast capability), and its functional-block diagram as shown in Figure 2.
The major defect that terrestrial DTV exists at present:
1, under user watched state, cannot realize emergency function;
2, under user's holding state, cannot realize emergency function.
Summary of the invention
The problem existing for above-mentioned prior art, the invention provides a kind of terrestrial DTV intelligent emergent broadcast, first object is when there is the emergency informations such as the natural calamities such as earthquake, mud-rock flow, flood, arid, snow disaster or social public accident, and digital front-end is broadcast emergent trigger message and corresponding emergent broadcast stream.
Another object of the present invention is in the normal rating of user, the normal process trigger message of meeting an urgent need, and force handoff is to emergent broadcast channel, by the corresponding emergent broadcast information of television broadcasting.
A further object of the present invention is under user's ideal case, the normal process trigger message of meeting an urgent need, and force handoff, to emergent broadcast channel, expands the corresponding emergent broadcast information of machine sowing place by terrestrial DTV.
To achieve these goals, the technical solution used in the present invention is: the scheme that realizes the emergent intelligent broadcast of terrestrial DTV comprises two large modules: the editor of front end stream, broadcast and terminal stream receives, broadcasting.
1, the editor of front end stream, broadcast
Trigger the editor of stream and broadcast.
Trigger the private data stream that stream refers to trigger emergent broadcast information.This private data comprises the parameter such as frequency, audio frequency, video PID of answering torrent place, these private datas are by " 13818-1 " standard, according to set form, be inserted in the private data section of NIT table, NIT table is multiplexed into after each frequency, by modulators modulate, becomes RF signal, blender to spread out of after mixing.
Answer the editor of torrent and broadcast.
Answer torrent to refer to emergent broadcast information content stream, this stream generally by source of sound (phone, DVD, microphone etc.) by the Multi-encoder processing of encoding, and get some parameter that triggers stream, as audio frequency, video PID, parameter is compiled and is triggered stream by certain mode, TS stream after coding is multiplexed into certain fixing frequency, by modulators modulate, becomes RF signal, after blender mixes, spreads out of.
2, reception, the broadcasting of terminal stream.
During the normal rating of user: trigger reception and the processing of stream.
Terminal Real-Time Monitoring NIT table, triggers stream information and just parses once find to carry in NIT table, obtains triggering flow data: the parameters such as frequency, the audio frequency PID that answers torrent, video PID of answering torrent place.
During the normal rating of user: reception and the processing of answering torrent.
Terminal gets and triggers after flow data, forces to jump to the frequency at emergent stream information place, and play actual emergent content according to triggering flow data, by TV, sound, video is spread out of.
During user's standby: trigger reception and the processing of stream.
Terminal must have true idle function, and host CPU is is regularly patrolled and examined triggering stream information, once find to carry in NIT table, triggers stream information and just resolves, and gets after answering torrent place frequency, audio stream PID, video flowing PID and stores.
During user's standby: reception and the processing of answering torrent.
Terminal must realize loud speaker or loudspeaker function, after also needing host CPU regularly to patrol and examine, finds to exist emergent stream information simultaneously, jumps to immediately the frequency of answering torrent place, and plays emergent stream information, by loud speaker, spreads out of.
Useful result of the present invention is: at front end, can pass through coder processes source of sound, by software engineering editor trigger message, finally at front end, realize and answer torrent, trigger broadcasting of stream.
According to the present invention, in terminal, detect and trigger stream information, emergent stream information, by software engineering, process trigger message and emergency information, final realization triggers stream, answers the broadcasting of torrent.
According to the present invention, in terminal, realize true standby, loudspeaker function, in conjunction with triggering stream, answering broadcasting and playing of torrent, by loud speaker or TV, finally realize emergent broadcast function.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the ground digital front end system schematic diagram of the inventive method;
Fig. 2 is the functional-block diagram that the digital TV terminal of the inventive method mainly refers to ground digital Set Top Box (without intelligent emergent broadcast capability);
Fig. 3 is the front-end processing flow chart of the inventive method;
Fig. 4 is the end product theory diagram of the inventive method.
Embodiment
As shown in Figure 1, realize terrestrial digital television system intelligent emergent broadcasting method front-end processing flow chart;
As shown in Figure 2, realize terrestrial digital television system intelligent emergent broadcasting method end product theory diagram.
the inventive method realize principle
Step 1, answer the realization of torrent
Emergent broadcast information comprises audio frequency, Video stream information; Initial audio-video signal may be sound console, crisis phone only, microphone, DVD etc., by forming TS after encoder encodes, flows, and, modulators modulate multiplexing by multiplexer arrives a certain frequency, then spread out of by blender afterwards.
The realization of step 2, triggering stream
First obtain the parameter that triggers stream information, mainly according to step 1, obtain answering some parameter of torrent, the data structure of design parameter is as follows:
announcement_support_descriptor(){
descriptor_tag 8 Uimsbf
descriptor_length 8 Uimsbf
announcement_ver 8 Uimsbf
announcement_fre 16 Uimsbf
announcement_level 8 Uimsbf
announcement_vol 8 Uimsbf
announcement_vpid 16 Uimsbf
announcement_apid 16 Uimsbf
announcement_pcrpid 16 Uimsbf
}
Above-mentioned data structure is intelligent emergent ad stream trigger message descriptor, and concrete semanteme is:
Descriptor_tag: descriptor indicates, and the present embodiment is defined as 0xB1, mainly in order to indicate emergent descriptor
Descriptor_length: the length of descriptor, except indicating set of bytes length length in addition itself
Announcement_ver: the version of emergent broadcast information, same version is not in reprocessing
Announcement_fre: the frequency at emergent broadcast information place, collect and answer torrent need to first lock this frequency
Announcement_level: the rank of emergent broadcast is high in digital TV terminal priority treatment rank
Announcement_vol: answer torrent original sound volume size, play and answer torrent to be as the criterion with this volume
Announcement_vpid: answer torrent video PID, indicate and play emergent video according to this
Announcement_apid: emergent audio stream PID, indicates and play emergent audio frequency according to this
Announcement_pcrpid: audio-visual synchronization
According to said structure, data are inserted into after the ground floor circulation of NIT by multiplexer, after multiplexing, synchronously broadcast with other streams.
The realization of step 3, the true idle function of terrestrial DTV.
The present embodiment is chosen the chip MB86H06 of Fujitsu master chip, dominant frequency 324M, and chip can be supported true idle function, power consumption is less than 1W, according near circuit original ground Digital Television power supply, can increase true idle function, is mainly used in host CPU and regularly patrols and examines emergent stream information.
The realization of step 4, terrestrial DTV loudspeaker function.
On terrestrial digital television set box rear board, realize a plurality of pore functions, here involve the die sinking in accordance with regulations of terrestrial DTV shell, mono speaker is realized in plate the inside in the back, built-in mono speaker, peak-to-peak value power is not less than 2.5W, main MCU single-chip microcomputer, the little public address equipment of increasing, by being connected, debugging processing MCU chip microcontroller with master chip.
Step 5, terrestrial DTV trigger stream, answer the processing of torrent
Trigger reception and the processing of stream: terrestrial DTV is set up NIT monitoring thread when main program initialization, Real-Time Monitoring NIT table, resolves immediately, preserves when having trigger message in finding NIT table.According to trigger message parameter, lock the frequency of answering torrent place, force handoff, to answering torrent frequency, is specified and is play emergent channel according to trigger message, spreads out of emergent broadcast information by TV or loud speaker simultaneously simultaneously.
Above-mentioned whole process has just realized broadcasting and the reception of the emergent intelligent broadcast of terrestrial digital television system, has met greatly the realization of national Emergency System.
Claims (3)
1. on a kind of terrestrial digital television system according to claim 1, realize intelligent emergent broadcast, comprise that front end answers the editor of torrent, it is characterized in that: can receive, process dissimilar source of sound: DVD, microphone, phone, tuning device etc.; Through encoder code editorial afterword, form TS stream.
2. on a kind of terrestrial digital television system according to claim 1, realize intelligent emergent broadcast, comprise that front end triggers the editor of stream, is characterized in that: can obtain the parameter of answering torrent: the frequency, audio frequency PID, the video PID etc. that answer torrent place; According to 13818-1 technical specification form set form private setting descriptor, algorithm for design is inserted into private setting descriptor in the ground floor circulation of NIT, simultaneously that NIT is multiplexing, this stream meets Moving Picture Experts Group-2, low being convenient to of the error rate receives, processes.
3. on a kind of terrestrial digital television system according to claim 1, realize intelligent emergent broadcast, comprise the processing of terminal stream, it is characterized in that: the private data of implementing monitoring NIT, inquiry emergent broadcast triggers stream information, and carry out stores processor, pressure jumps to corresponding frequency and plays, and by TV or Set Top Box loud speaker, broadcasts audio/video information.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103974199A (en) * | 2014-04-15 | 2014-08-06 | 重庆广播电视信息网络有限公司潼南分公司 | Broadcasting system with emergency information issuing function |
| CN105208405A (en) * | 2014-06-30 | 2015-12-30 | 惠州市伟乐科技股份有限公司 | Emergency video broadcasting device and method |
| CN105681847A (en) * | 2016-02-22 | 2016-06-15 | 深圳创维数字技术有限公司 | Method and system for frontally controlling set top box (STB) terminal |
| CN109640143A (en) * | 2018-12-27 | 2019-04-16 | 深圳西米通信有限公司 | A kind of triggering method based on terrestrial digital television set box emergent broadcast |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103974199A (en) * | 2014-04-15 | 2014-08-06 | 重庆广播电视信息网络有限公司潼南分公司 | Broadcasting system with emergency information issuing function |
| CN105208405A (en) * | 2014-06-30 | 2015-12-30 | 惠州市伟乐科技股份有限公司 | Emergency video broadcasting device and method |
| CN105681847A (en) * | 2016-02-22 | 2016-06-15 | 深圳创维数字技术有限公司 | Method and system for frontally controlling set top box (STB) terminal |
| CN105681847B (en) * | 2016-02-22 | 2019-01-04 | 深圳创维数字技术有限公司 | A kind of method and system of front-end control STB terminal |
| CN109640143A (en) * | 2018-12-27 | 2019-04-16 | 深圳西米通信有限公司 | A kind of triggering method based on terrestrial digital television set box emergent broadcast |
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Application publication date: 20140122 |