CN205545293U - Wireless public broadcasting data system - Google Patents
Wireless public broadcasting data system Download PDFInfo
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- CN205545293U CN205545293U CN201620043667.4U CN201620043667U CN205545293U CN 205545293 U CN205545293 U CN 205545293U CN 201620043667 U CN201620043667 U CN 201620043667U CN 205545293 U CN205545293 U CN 205545293U
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Abstract
The utility model provides a wireless public broadcasting data system includes radio frequency emission terminal and radio frequency receiver terminal, the radio frequency emission terminal includes audio frequency program source, PC host computer, RDS encoder, phase -locked loop frequency synthesizer and modulator, RF power amplifier, the PC host computer is connected with the RDS encoder, audio frequency program source is connected with phase -locked loop frequency synthesizer and modulator, phase -locked loop frequency synthesizer and modulator still respectively with the RDS encoder with the RF power amplifier is connected, the radio frequency receiver terminal includes radio frequency receiver and demodulation module, RDS decoder, CPU, audio power amplifier and display screen, radio frequency receiver and demodulation module respectively with the RF power amplifier the RDS decoder reaches audio power amplifier connects, CPU respectively with the RDS decoder audio power amplifier and the display screen is connected. This system has still increased the broadcast videography function except the function that possesses traditional public broadcasting system.
Description
Technical field
This utility model relates to a kind of wireless public broadcasting data system.
Background technology
Wireless Public Address system is applied widely, and such as: market, supermarket, campus is broadcasted, tourist attractions, rural area Rural areas broadcast etc..
Product on existing market can be divided into wired public broadcasting and wireless public broadcasting, the most also product of addressable function by transmission means.Addressable function, refer to pass through transmitter terminal, send corresponding address code, control the switch of radio frequency reception terminal (such as: wireless sound box etc.), and subregion selectively opened radio frequency reception terminal, such as, campus public broadcasting can be realized, sometimes for selecting certain class or grade are broadcasted, it is simply that utilize addressable functional realiey.
Traditional Public Address system, can only be that the form of audio frequency is broadcasted, because the ageing problem of audio frequency, listener easily misses and listens to, and broadcast videography, information to be passed on then can show at display screen for a long time.
Utility model content
The utility model proposes a kind of wireless public broadcasting data system, solve system of the prior art and cannot transmit the deficiency of picture and text, be allowed to be more widely applied, practical.
The technical solution of the utility model is achieved in that a kind of wireless public broadcasting data system includes radio-frequency transmissions terminal and radio frequency reception terminal, described radio-frequency transmissions terminal includes audio program source, PC host computer, RDS encoder, phase-locked loop frequency synthesizer and manipulator, radio-frequency power amplifier, described PC host computer is connected with RDS encoder, described audio program source is connected with phase-locked loop frequency synthesizer and manipulator, and described phase-locked loop frequency synthesizer and manipulator are connected with described RDS encoder and described radio-frequency power amplifier the most respectively；Described radio frequency reception terminal includes radio frequency reception demodulation module, RDS decoder, CPU, audio-frequency power amplifier and display screen, described radio frequency reception demodulation module are connected with described radio-frequency power amplifier, described RDS decoder and described audio-frequency power amplifier respectively, and described CPU is connected with described RDS decoder, described audio-frequency power amplifier and described display screen respectively.
Further, described audio program source is CD player or MP3 player or microphone.
Further, described audio-frequency power amplifier is connected with speaker.
The beneficial effects of the utility model are: wireless public broadcasting data system of the present utility model, in addition to possessing the function of traditional Public Address system, also add broadcast videography function.Although wireless public broadcasting data system of the present utility model adds additional data transmission channel, but it can't change the channel bandwidth of original frequency modulation broadcasting, it can fill part and utilize original frequency spectrum resource, open up a data passage, say, that in the case of without changing channel bandwidth, audio broadcasting can be realized carry out with data transmission simultaneously, and, while data communication, do not interfere with the tonequality of audio broadcasting.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic block circuit diagram of an embodiment of a kind of wireless public broadcasting data system of this utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Native system, on the basis of the most existing common product, adds word, or picture transfer function, say, that native system possesses the functions such as audio broadcasting, addressable broadcast, words information broadcast, pictorial information broadcast.
The data function of native system will use RDS technology to realize, and refer to " GB-T 15770-95 radio data system (RDS) technical specification " in detail.
As shown in Figure 1, a kind of wireless public broadcasting data system includes radio-frequency transmissions terminal and radio frequency reception terminal, described radio-frequency transmissions terminal includes audio program source, PC host computer, RDS encoder, phase-locked loop frequency synthesizer and manipulator, radio-frequency power amplifier, described PC host computer is connected with RDS encoder, described audio program source is connected with phase-locked loop frequency synthesizer and manipulator, and described phase-locked loop frequency synthesizer and manipulator are connected with described RDS encoder and described radio-frequency power amplifier the most respectively；Described radio frequency reception terminal includes radio frequency reception demodulation module, RDS decoder, CPU, audio-frequency power amplifier and display screen, described radio frequency reception demodulation module are connected with described radio-frequency power amplifier, described RDS decoder and described audio-frequency power amplifier respectively, and described CPU is connected with described RDS decoder, described audio-frequency power amplifier and described display screen respectively.
Audio program source, such as CD player, MP3 player, microphone etc., after tuning processes, as " the audio program source " of native system, it is connected to (PLL) phase-locked loop frequency synthesizer and manipulator is modulated.
PC host computer is installed on computer, by word, picture, addressing code etc., processes and becomes the data that RDS encoder can identify.
RDS encoder is used for producing 57KHZ subchannel, and will modulate this from the data of PC upper computer end
On subchannel.
(PLL) phase-locked loop frequency synthesizer and manipulator are used for producing radiofrequency signal, and the rf frequency that native system uses is: 76 ~ 108MHZ.And the 57KHZ subchannel signal that signal and the RDS encoder from audio program source produces is modulated, produce the radiofrequency signal of oneself modulation.
Radio-frequency power amplifier: owing to PLL phase-locked loop frequency synthesizer and manipulator signal out is the faintest, transmitting range is the most limited, so utilizing radio-frequency power amplifier, is amplified to enough power.
Audio program source is connected to PLL phase-locked loop frequency synthesizer and manipulator, completes the modulation of audio frequency.
Native system is also equipped with data-transformation facility, to realize transmission word, and picture, and addressing code etc..Word, picture and addressing code, upper computer software on computers is dealt with, the data handled well are sent to RDS encoder by RS232 serial ports, RDS encoder will produce the own modulated signal of 57KHZ, and this signal being connected to PLL phase-locked loop frequency synthesizer and manipulator is modulated, the signal of 57KHz forms a subchannel after PLL phase-locked loop frequency synthesizer and manipulator are modulated, and this subchannel just transmits for data.
Phase-locked loop frequency synthesizer and manipulator signal out includes audio program, and the radiofrequency signal of data transmission subchannel exactly, and the radiofrequency signal of this oneself modulation is connected to radio-frequency power amplifier and enters amplification, then launched by antenna-feedback system.
Radio frequency reception demodulation module are identical with common FM FM receiver function, and it is responsible for receiving the signal coming from radio-frequency transmissions terminal, and demodulates audio signal, and the RDS subchannel signal of 57KHZ.
The effect of RDS decoder is the RDS signal of 57KHZ to be decoded, and restores the data stream that CPU can process.
CPU(processor) effect on the one hand be the data receiving and coming from RDS decoder, on the other hand it is that data are identified, and process, perform the action being correlated with respectively by the type of data, such as, if the data received are addressing code types, then the address code with the machine contrasts, if meet, if just the same with the machine address code, then open audio frequency power amplifier, commence play out the audio program coming from radio-frequency transmissions terminal.If receiving data is image, text and data type, then send it to display screen.
The effect of audio-frequency power amplifier is will to demodulate audio signal out, makes power amplification, makes the phase have enough power and be pushed to speaker.
The graph text information that display screen is responsible for radio-frequency transmissions terminal sends shows.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (3)
1. a wireless public broadcasting data system, it is characterized in that, including radio-frequency transmissions terminal and radio frequency reception terminal, described radio-frequency transmissions terminal includes audio program source, PC host computer, RDS encoder, phase-locked loop frequency synthesizer and manipulator, radio-frequency power amplifier, described PC host computer is connected with RDS encoder, described audio program source is connected with phase-locked loop frequency synthesizer and manipulator, and described phase-locked loop frequency synthesizer and manipulator are connected with described RDS encoder and described radio-frequency power amplifier the most respectively；Described radio frequency reception terminal includes radio frequency reception demodulation module, RDS decoder, CPU, audio-frequency power amplifier and display screen, described radio frequency reception demodulation module are connected with described radio-frequency power amplifier, described RDS decoder and described audio-frequency power amplifier respectively, and described CPU is connected with described RDS decoder, described audio-frequency power amplifier and described display screen respectively.
Wireless public broadcasting data system the most as claimed in claim 1, it is characterised in that: described audio program source is CD player or MP3 player or microphone.
Wireless public broadcasting data system the most as claimed in claim 1, it is characterised in that: described audio-frequency power amplifier is connected with speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620043667.4U CN205545293U (en) | 2016-01-18 | 2016-01-18 | Wireless public broadcasting data system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620043667.4U CN205545293U (en) | 2016-01-18 | 2016-01-18 | Wireless public broadcasting data system |
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| Publication Number | Publication Date |
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| CN205545293U true CN205545293U (en) | 2016-08-31 |
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| CN201620043667.4U Active CN205545293U (en) | 2016-01-18 | 2016-01-18 | Wireless public broadcasting data system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890660A (en) * | 2021-10-28 | 2022-01-04 | 浙江力石科技股份有限公司 | Control method and control system for broadcasting scheduling middling station |
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2016
- 2016-01-18 CN CN201620043667.4U patent/CN205545293U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890660A (en) * | 2021-10-28 | 2022-01-04 | 浙江力石科技股份有限公司 | Control method and control system for broadcasting scheduling middling station |
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