CN205283751U - Emergent output device of multiple source based on digital television - Google Patents
Emergent output device of multiple source based on digital television Download PDFInfo
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- CN205283751U CN205283751U CN201521064227.9U CN201521064227U CN205283751U CN 205283751 U CN205283751 U CN 205283751U CN 201521064227 U CN201521064227 U CN 201521064227U CN 205283751 U CN205283751 U CN 205283751U
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Abstract
The utility model discloses an emergent output device of multiple source based on digital television, including central processing unit, terrestrial digital TV receive demodulate ware, there is line number word TV receive demodulate ware, network signal receiver, wireless frequency modulation signal receiver, local sound source signal amplifier, the sound source selector, the amplifirer, relay and speaker, a terrestrial digital TV receive demodulate ware for receiving radiofrequency signal in the terrestrial digital TV network, a network signal receiver for receiving what have radiofrequency signal in the line number word TV network has line number word TV receive demodulate ware and is used for receiving the network signal, the received signal is changed into intermediate frequency signal to the three, input central processing unit, central processing unit carries out the demodulation to intermediate frequency signal again, separate multiplexingly, divide into the video flowing, audio stream and data flow, information in the data flow contains the identification signal of emergent information. The utility model discloses can handle the signal of multiple source, enlarge, the preferred class sets for and judges.
Description
Technical field
This utility model belongs to digital TV field, relates to the emergent output device of a kind of multiple source based on DTV.
Background technology
Although China's informatization in recent years achieves very big achievement, network, TV, mobile phone universal, greatly improve the level of IT application of vast rural area, but some government informations of two-tier government of county of township, and some agricultural informations of locality but cannot be communicated in peasant's hands timely, causing that government work is bad to be done, peasant does not know the situation of new policy.
The Party Central Committee, State Council point out in " about actively developing modern industry, some suggestions of building Socialist New of going ahead in a down-to-earth manner ", the top priority of building Socialist New " developing modern agriculture be ". " during 11th Five-Year country's Emergent Public Events Emergency System construction plan " proposes: " strengthen early warning system and early warning information distribution platform is built; build all kinds of Emergent Public Events information and issue public channel; improve the pre-alerting ability of the whole society's particularly information such as outlying mountain area, rural area end, solve early warning information and issue the bottleneck problem of last km ".
The enforcement of rural power grids emergent broadcast can make the cadre of vast rural area and the masses further can understand and grasp route, principles and policies in time, improves the quality of the common people, is conducive to advancing poverty-stricken area expanding economy and social progress. Supporting system platform, utilize broadcasting station to broadcast and intercut such as property, government affairs every day, employment information, antidetonation live in peace subsidy, move back more also woods policy and living closely bound up content with peasants and herdsmen, contribute to the more wider array of understanding social information of the masses, urban residents are allowed to know next step task emphasis of party, more directly understand agricultural sci-tech knowledge, compulsory education in rural areas, the cooperative medical service program of rural areas, the rural area policies of low level living security etc., strengthen legal system and rights and interests understanding.
Utility model content
For solving the problems referred to above, the purpose of this utility model be in that to provide a kind of the signal of multiple source can be processed, amplify, emergent output device that priority sets and judges.
For achieving the above object, the technical solution of the utility model is: a kind of multiple source based on DTV is met an urgent need output device, demodulator, cable digital TV reception demodulator, network signal receptor, wireless frequency modulation signal receiver, local sound source signal amplifier, source of sound selector, amplifirer, relay and speaker is received including central processing unit, terrestrial DTV, wherein
Central processing unit for the work of Coordination Treatment each several part is connected respectively with terrestrial DTV reception demodulator, cable digital TV reception demodulator, network signal receptor, wireless frequency modulation signal receiver, local sound source signal amplifier, source of sound selector, relay;
For receiving the terrestrial DTV reception demodulator of the radiofrequency signal in terrestrial DTV network, the cable digital TV for receiving the radiofrequency signal in Cable Digital TV Network receives demodulator and for receiving the network signal receptor of network signal, the signal received is changed into intermediate-freuqncy signal by three, it is input to central processing unit, intermediate-freuqncy signal is demodulated, demultiplexes by central processing unit again, being divided into video flowing, audio stream and data stream, the information in data stream contains the identification signal of emergency information;
Wireless frequency modulation signal receiver for receiving wireless frequency modulation emergency information is connected with source of sound selector;
Local sound source signal amplifier for receiving local microphone emergency information is connected with source of sound selector;
For selecting the source of sound selector playing source of sound to be connected with central processing unit and amplifirer, the emergency information play will be needed to be sent to amplifirer according to the priority orders set, the speaker output connected by amplifirer after amplification;
Relay for controlling amplifirer switch is connected with central processing unit and amplifirer, when absence of audio exports, is closed by amplifirer.
Preferably, described central processing unit is HI3110 chip.
Preferably, described terrestrial DTV reception demodulator includes TC3800 chip.
Preferably, described cable digital TV reception demodulator includes DTC2 chip.
Preferably, described network signal receptor includes LAN8720 chip.
Preferably, described wireless frequency modulation signal receiver includes CVF-R02 chip.
Preferably, described local sound source signal amplifier includes SGM723 chip.
Preferably, described source of sound selector includes SGM3002 chip.
Preferably, described amplifirer includes MPA300 chip.
Preferably, described relay includes HF115F chip.
Compared with prior art, the beneficial effects of the utility model are as follows: can be play by emergency information override in multiple signal source, remote control switch machine, volume, frequency error factor, and power amplification in addition, it is possible to promote multiple high-frequency horn playback; When running into illegal signals interference attack; central processing unit controls cut-off, and invalid information recovers normal operation after disappearing again, has certain signal input protection; receive and also can install discharge tube additional and exchange isolation capacitance inside signal input part, strengthen the protective capacities to thunderbolt.
Accompanying drawing explanation
Fig. 1 is the emergent output device structural representation of the multiple source based on DTV of this utility model specific embodiment.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, this utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.
On the contrary, this utility model contains any replacement made in spirit and scope of the present utility model, amendment, equivalent method and scheme being defined by the claims. Further, in order to make the public that this utility model to be had a better understanding, in below details of the present utility model being described, detailed describe some specific detail sections. The description not having these detail sections for a person skilled in the art can also understand this utility model completely.
Referring to Fig. 1, it show the structural representation of the emergent output device of a kind of multiple source based on DTV of this utility model embodiment, including central processing unit 10, terrestrial DTV receives demodulator 20, cable digital TV receives demodulator 30, network signal receptor 40, wireless frequency modulation signal receiver 50, local sound source signal amplifier 60, source of sound selector 70, amplifirer 80, relay 90 and speaker 91, wherein, central processing unit 10 for the work of Coordination Treatment each several part receives demodulator 20 with terrestrial DTV, cable digital TV receives demodulator 30, network signal receptor 40, wireless frequency modulation signal receiver 50, local sound source signal amplifier 60, source of sound selector 70, relay 90 connects respectively, for receiving the terrestrial DTV reception demodulator 20 of the radiofrequency signal in terrestrial DTV network, the cable digital TV for receiving the radiofrequency signal in Cable Digital TV Network receives demodulator 30 and for receiving the network signal receptor 40 of network signal, the signal received is changed into intermediate-freuqncy signal by three, it is input to central processing unit 10, intermediate-freuqncy signal is demodulated, demultiplexes by central processing unit 10 again, being divided into video flowing, audio stream and data stream, the information in data stream contains the identification signal of emergency information, wireless frequency modulation signal receiver 50 for receiving wireless frequency modulation emergency information is connected with source of sound selector 70, local sound source signal amplifier 60 for receiving local microphone emergency information is connected with source of sound selector 70, for selecting the source of sound selector 70 playing source of sound to be connected with central processing unit 10 and amplifirer 80, the emergency information play being needed to be sent to amplifirer 80 according to the priority orders set, the speaker 91 connected by amplifirer 80 after amplification exports, relay 90 for controlling amplifirer 80 switch is connected with central processing unit 10 and amplifirer 80, when absence of audio exports, is closed by amplifirer 80. by the emergent output device of the multiple source based on DTV of arrangement above, the work of central processing unit 10 Coordination Treatment modules, specifically, terrestrial DTV receives demodulation module 20 and the radiofrequency signal in received terrestrial DTV network is changed into intermediate-freuqncy signal, intermediate-freuqncy signal is demodulated, demultiplexes by central processing unit 10, and signal is divided into video flowing, audio stream and data stream. cable digital TV receives demodulation module 30 and the radiofrequency signal in received Cable Digital TV Network is changed into intermediate-freuqncy signal, and intermediate-freuqncy signal is demodulated, demultiplexes by central processing unit 10, and signal is divided into video flowing, audio stream and data stream. the signal of information source is received and is transferred to central processing unit by network signal receiver module, the emergency information simulated audio signal that local microphone receives is amplified by local sound source signal amplification module, wireless frequency modulation signal receiving module receives the emergency information voice data of wireless frequency modulation, it is supplied to 3 group data streams of central processing unit, may identify which out whether this group information contains emergent important information according to the information in data stream, if there being emergent important information, this group audio-frequency information is exported, simulated audio signal is received with local audio signal amplification module, the emergency information audio signal that wireless frequency modulation signal receiving module receives exports source of sound together and selects module, according to the priority orders set, central processing unit controls source of sound and selects module to select the audio frequency output of priority Gao mono-road, output is to power amplifier module, be supplied to after amplification terminal speaker.When Er tri-road audio frequency is all without output, central processing unit controls relay module, is closed by power amplifier module, and whole system is in low-power consumption mode, and speaker is without response.
In specific embodiment, central processing unit 10 is HI3110 chip; Terrestrial DTV receives demodulator 20 and includes TC3800 chip; Cable digital TV receives demodulator 30 and includes DTC2 chip; Network signal receptor 40 includes LAN8720 chip; Wireless frequency modulation signal receiver 50 includes CVF-R02 chip; Local sound source signal amplifier 60 includes SGM723 chip; Source of sound selector 70 includes SGM3002 chip; Amplifirer 80 includes MPA300 chip; Relay 90 includes HF115F chip; Speaker 91 is 4-16 �� or 70-120V. Arranged by each module chipization so that apparatus structure is simple, function admirable.
By the emergent output device of the multiple source based on DTV of arrangement above, emergency information override can be play in multiple signal source, remote control switch machine, volume, frequency error factor, and in addition power amplification, it is possible to promote multiple high-frequency horn playback; When running into illegal signals interference attack; central processing unit controls cut-off, and invalid information recovers normal operation after disappearing again, has certain signal input protection; receive and also can install discharge tube additional and exchange isolation capacitance inside signal input part, strengthen the protective capacities to thunderbolt.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within protection domain of the present utility model.
Claims (10)
1. the emergent output device of the multiple source based on DTV, it is characterized in that, demodulator, cable digital TV reception demodulator, network signal receptor, wireless frequency modulation signal receiver, local sound source signal amplifier, source of sound selector, amplifirer, relay and speaker is received including central processing unit, terrestrial DTV, wherein
Central processing unit for the work of Coordination Treatment each several part is connected respectively with terrestrial DTV reception demodulator, cable digital TV reception demodulator, network signal receptor, wireless frequency modulation signal receiver, local sound source signal amplifier, source of sound selector, relay
For receiving the terrestrial DTV reception demodulator of the radiofrequency signal in terrestrial DTV network, the cable digital TV for receiving the radiofrequency signal in Cable Digital TV Network receives demodulator and for receiving the network signal receptor of network signal, the signal received is changed into intermediate-freuqncy signal by three, it is input to central processing unit, intermediate-freuqncy signal is demodulated, demultiplexes by central processing unit again, being divided into video flowing, audio stream and data stream, the information in data stream contains the identification signal of emergency information;
Wireless frequency modulation signal receiver for receiving wireless frequency modulation emergency information is connected with source of sound selector;
Local sound source signal amplifier for receiving local microphone emergency information is connected with source of sound selector;
For selecting the source of sound selector playing source of sound to be connected with central processing unit and amplifirer, the emergency information play will be needed to be sent to amplifirer according to the priority orders set, the speaker output connected by amplifirer after amplification;
Relay for controlling amplifirer switch is connected with central processing unit and amplifirer, when absence of audio exports, is closed by amplifirer.
2. device according to claim 1, it is characterised in that described central processing unit is H13110 chip.
3. device according to claim 1, it is characterised in that described terrestrial DTV receives demodulator and includes TC3800 chip.
4. device according to claim 1, it is characterised in that described cable digital TV receives demodulator and includes DTC2 chip.
5. device according to claim 1, it is characterised in that described network signal receptor includes LAN8720 chip.
6. device according to claim 1, it is characterised in that described wireless frequency modulation signal receiver includes CVF-R02 chip.
7. device according to claim 1, it is characterised in that described local sound source signal amplifier includes SGM723 chip.
8. device according to claim 1, it is characterised in that described source of sound selector includes SGM3002 chip.
9. device according to claim 1, it is characterised in that described amplifirer includes MPA300 chip.
10. device according to claim 1, it is characterised in that described relay includes HF115F chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521064227.9U CN205283751U (en) | 2015-12-18 | 2015-12-18 | Emergent output device of multiple source based on digital television |
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| CN201521064227.9U CN205283751U (en) | 2015-12-18 | 2015-12-18 | Emergent output device of multiple source based on digital television |
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| CN205283751U true CN205283751U (en) | 2016-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
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