CN205283752U - Multiple source wireless frequency modulation modulating device based on digital television - Google Patents
Multiple source wireless frequency modulation modulating device based on digital television Download PDFInfo
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- CN205283752U CN205283752U CN201521064505.0U CN201521064505U CN205283752U CN 205283752 U CN205283752 U CN 205283752U CN 201521064505 U CN201521064505 U CN 201521064505U CN 205283752 U CN205283752 U CN 205283752U
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Abstract
The utility model discloses a multiple source wireless frequency modulation modulating device based on digital television, including central processing unit, there is line number word TV receive demodulate ware, network signal receiver, local sound source signal amplifier, the sound source selector, wireless frequency modulation modulator and wireless frequency modulation receiving equipment, there are line number word TV receive demodulate ware and network signal receiver to change the received signal into intermediate frequency signal, 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, an emergent message routing gives the wireless frequency modulation modulator for selecting the sound source selector of broadcast sound source is connected with central processing unit and wireless frequency modulation modulator, in proper order plays needs according to the priority of settlement. the utility model discloses realize emergent selection of 3 kind at least information sources and export that do not need the emergent information equipment of other receipt, convenient and practical practices thrift the cost.
Description
Technical field
This utility model belongs to digital TV field, relates to a kind of multiple source wireless frequency modulation modulating device based on DTV.
Background technology
The enforcement of 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. But generally still listen to emergency information by radio at present, for very inconvenient the rural area that current cable digital TV is universal, how to 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, 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. This is problem demanding prompt solution.
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, wireless frequency modulation modulating device that priority sets and judges.
For achieving the above object, the technical solution of the utility model is: a kind of multiple source wireless frequency modulation modulating device based on DTV, receive demodulator, network signal receptor, local sound source signal amplifier, source of sound selector, wireless frequency modulation manipulator and wireless frequency modulation receive equipment including central processing unit, cable digital TV, wherein
Central processing unit for the work of Coordination Treatment each several part is connected respectively with cable digital TV reception demodulator, network signal receptor and source of sound selector;
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 the two, 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;
Local sound source signal amplifier for receiving local microphone emergency information is connected with source of sound selector;
For select play source of sound source of sound selector is connected with central processing unit and wireless frequency modulation manipulator, according to set priority orders will need play emergency information be sent to wireless frequency modulation manipulator, after by wireless frequency modulation receive equipment reception after broadcast.
Preferably, described central processing unit is HI3110 chip.
Preferably, described cable digital TV reception demodulator includes DTC2 chip.
Preferably, described network signal receptor includes LAN8720 chip.
Preferably, described local sound source signal amplifier includes SGM723 chip.
Preferably, described source of sound selector includes SGM3002 chip.
Preferably, described wireless frequency modulation manipulator includes TN85 chip.
Compared with prior art, the beneficial effects of the utility model are as follows: can receive digital catv signal, network signal and local sound source signal, demodulated, demultiplexing, by the emergency information identification in digital catv signal and network signal, and broadcasts equipment by wired and wireless transmission to reception. The conversion of audio frequency, microphone is easy to operate, the features such as total harmonic distortion is little, Out-of-band rejection, is the ideal corollary equipment of frequency modulation broadcasting co-cable transmission. Realize the emergent of at least 3 kinds of information sources and select output, do not need other reception emergency information equipment, convenient and practical, save cost.
Accompanying drawing explanation
Fig. 1 is the multiple source wireless frequency modulation modulating device structural representation 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 a kind of multiple source wireless frequency modulation modulating device based on DTV of this utility model embodiment, receive demodulator 20, network signal receptor 30, local sound source signal amplifier 40, source of sound selector 50, wireless frequency modulation manipulator 60 and wireless frequency modulation receive equipment 70 including central processing unit 10, cable digital TV, wherein, receive demodulator 20, network signal receptor 30 and source of sound selector 50 for the central processing unit 10 of Coordination Treatment each several part work with cable digital TV to be connected respectively, cable digital TV for receiving the radiofrequency signal in Cable Digital TV Network receives demodulator 20 and for receiving the network signal receptor 30 of network signal, the signal received is changed into intermediate-freuqncy signal by the two, 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, local sound source signal amplifier 40 for receiving local microphone emergency information is connected with source of sound selector 50, for selecting the source of sound selector 50 playing source of sound to be connected with central processing unit 10 and wireless frequency modulation manipulator 60, according to set priority orders will need play emergency information be sent to wireless frequency modulation manipulator 60, after by wireless frequency modulation receive equipment 70 receive after broadcast. by the multiple source wireless frequency modulation modulating device based on DTV of arrangement above, central processing unit coordinates processes the work of modules, specifically, cable digital TV receives demodulation module and the radiofrequency signal in received Cable Digital TV Network is changed into intermediate-freuqncy signal, intermediate-freuqncy signal is demodulated, demultiplexes by central processing unit, 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, it is supplied to 2 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, output selects module to source of sound together, 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 wireless frequency modulation manipulator, wireless frequency modulation manipulator is launched after this road audio signal is modulated, the a range of wireless frequency modulation of periphery receives after equipment receives signal and is broadcasted by emergency information.
In specific embodiment, central processing unit 10 is HI3110 chip; Cable digital TV receives demodulator 20 and includes DTC2 chip; Network signal receptor 30 includes LAN8720 chip; Local sound source signal amplifier 40 includes SGM723 chip; Source of sound selector 50 includes SGM3002 chip; Wireless frequency modulation manipulator 60 includes TN85 chip. Arranged by each module chipization so that apparatus structure is simple, function admirable.
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 (7)
1. the multiple source wireless frequency modulation modulating device based on DTV, it is characterized in that, receive demodulator, network signal receptor, local sound source signal amplifier, source of sound selector, wireless frequency modulation manipulator and wireless frequency modulation receive equipment including central processing unit, cable digital TV, wherein
Central processing unit for the work of Coordination Treatment each several part is connected respectively with cable digital TV reception demodulator, network signal receptor and source of sound selector;
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 the two, 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;
Local sound source signal amplifier for receiving local microphone emergency information is connected with source of sound selector;
For select play source of sound source of sound selector is connected with central processing unit and wireless frequency modulation manipulator, according to set priority orders will need play emergency information be sent to wireless frequency modulation manipulator, after by wireless frequency modulation receive equipment reception after broadcast.
2. device according to claim 1, it is characterised in that described central processing unit is HI3110 chip.
3. device according to claim 1, it is characterised in that described cable digital TV receives demodulator and includes DTC2 chip.
4. device according to claim 1, it is characterised in that described network signal receptor includes LAN8720 chip.
5. device according to claim 1, it is characterised in that described local sound source signal amplifier includes SGM723 chip.
6. device according to claim 1, it is characterised in that described source of sound selector includes SGM3002 chip.
7. device according to claim 1, it is characterised in that described wireless frequency modulation manipulator includes TN85 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064505.0U CN205283752U (en) | 2015-12-18 | 2015-12-18 | Multiple source wireless frequency modulation modulating device based on digital television |
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| CN201521064505.0U CN205283752U (en) | 2015-12-18 | 2015-12-18 | Multiple source wireless frequency modulation modulating device based on digital television |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317981A (en) * | 2017-06-29 | 2017-11-03 | 数源久融技术有限公司 | A kind of channel based on DVB C and DTMB receives switching control and method |
| 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 |
| CN108471336A (en) * | 2018-05-30 | 2018-08-31 | 张永平 | SaaS countryside broadcasts system and method Internet-based |
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2015
- 2015-12-18 CN CN201521064505.0U patent/CN205283752U/en active Active
Cited By (4)
| 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 |
| CN107317981A (en) * | 2017-06-29 | 2017-11-03 | 数源久融技术有限公司 | A kind of channel based on DVB C and DTMB receives switching control and method |
| CN107317981B (en) * | 2017-06-29 | 2024-04-19 | 数源久融技术有限公司 | Channel receiving switching control device and method based on DVB-C and DTMB |
| CN108471336A (en) * | 2018-05-30 | 2018-08-31 | 张永平 | SaaS countryside broadcasts system and method Internet-based |
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