CN202514005U - System for transmitting audio and video data on two core wires - Google Patents
System for transmitting audio and video data on two core wires Download PDFInfo
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- CN202514005U CN202514005U CN2012200229356U CN201220022935U CN202514005U CN 202514005 U CN202514005 U CN 202514005U CN 2012200229356 U CN2012200229356 U CN 2012200229356U CN 201220022935 U CN201220022935 U CN 201220022935U CN 202514005 U CN202514005 U CN 202514005U
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Abstract
The utility model provides a system for transmitting audio and video data on two core wires. The system comprises a power supply device, a master control device and a terminal which is connected with master control device. The master control device comprises a first polarity protection circuit which is connected with the power supply device, and also comprises a first data modulation transmission and filtering demodulation receiving circuit, a first video modulation difference transmission circuit, a first audio processing circuit, a first power supply conversion circuit and a first CPU which are respectively connected with the first polarity protection circuit. The first data modulation transmission and filtering demodulation receiving circuit, the first video modulation difference transmission circuit, the first audio processing circuit, and the first power supply conversion circuit are in mutual connection. The first CPU is connected with the first data modulation transmission and filtering demodulation receiving circuit. The system for transmitting audio and video data on the two core wires has the advantages of simple networking and high efficiency, the two core wires can work normally when in crossed misconnection, a construction error is prevented, differential transmission of signals is used, an anti-interference ability is strong, lightning protection processing is easy in transmission on the two core wires, and system detection and maintenance are simple.
Description
Technical field
The utility model relates to electronic technology field, the system of transmission audio, video data on particularly a kind of two heart yearns.
Background technology
Building visual intercommunication networking product of the prior art, between each equipment networking complicated, connections needs to adopt split conductor to connect, and caused that difficulty of construction is big, efficient is low, system construction detects safeguards complicacy.
The utility model content
The utility model provides a kind of audio, video data system of on two heart yearns, transmitting, and this system group network is simple, efficient is high, maintenance is simple.
To achieve these goals, the utility model provides following technical scheme:
A kind of system of on two heart yearns, transmitting audio, video data; It comprises: supply unit, master control set and be connected the terminal of institute's master control set; Said terminal is at least one; Said master control set comprises: first polar protective circuit, first data-modulated are sent and demodulation by filter receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit and a CPU; Wherein: said supply unit connects said first polar protective circuit; Said first data are sent and are connected said first polar protective circuit with filtering receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit respectively with a CPU; Interconnect respectively between said first data-modulated transmission and demodulation by filter receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit; A said CPU connects said first data-modulated and sends and the demodulation by filter receiving circuit; Said terminal comprises: second polar protective circuit, second data-modulated are sent and demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, second source translation circuit and the 2nd CPU; Wherein: said supply unit connects said second polar protective circuit; Said second data-modulated is sent and is connected said second polar protective circuit respectively with demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, second source translation circuit and the 2nd CPU; Interconnect respectively between said second data-modulated transmission and demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, the second source translation circuit; Said the 2nd CPU connects said second data-modulated and sends and the demodulation by filter receiving circuit, and said second polar protective circuit connects said first polar protective circuit.
Preferably, said supply unit connects said first polar protective circuit and second polar protective circuit through two heart yearns respectively.
Through implementing above technical scheme, have following technique effect: the audio, video data transmission system that the utility model provides, networking is simple, and efficient is high; But two heart yearns intersection misconnection is operate as normal also, has stopped construction and has made mistakes; Signal adopts differential transfer, and antijamming capability is strong, and lightning protection is handled easily; System construction detects to be safeguarded simply.
Description of drawings
The structural representation of the system that Fig. 1 provides for the utility model embodiment.
Embodiment
In order better to understand the technical scheme of the utility model, describe the embodiment that the utility model provides in detail below in conjunction with accompanying drawing.
The utility model provides a kind of system of on two heart yearns, transmitting audio, video data; As shown in Figure 1; Comprise: supply unit, master control set and be connected the terminal of institute's master control set; Among this embodiment; As shown in Figure 1; This terminal comprises at least one terminal such as terminal 1, terminal 2....; Said master control set comprises: first polar protective circuit, first data-modulated are sent and demodulation by filter receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit and a CPU; Wherein: said supply unit connects said first polar protective circuit; Said first data-modulated is sent and is connected said first polar protective circuit with demodulation by filter receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit respectively with a CPU; Interconnect respectively between said first data-modulated transmission and demodulation by filter receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit; A said CPU connects said first data-modulated and sends and the demodulation by filter receiving circuit, and said terminal comprises: second polar protective circuit, second data-modulated are sent and demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, second source translation circuit and the 2nd CPU, and wherein: said supply unit connects said second polar protective circuit; Said second data-modulated is sent and is connected said second polar protective circuit respectively with demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, second source translation circuit and the 2nd CPU; Interconnect respectively between said second data-modulated transmission and demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, the second source translation circuit, said the 2nd CPU connects said second data-modulated and sends and the demodulation by filter receiving circuit, and said second polar protective circuit connects said first polar protective circuit.This supply unit provides 48V direct current for the master control set of this system with each terminal; First data are sent and all adopted Fourier transform through the PWM technology with filtering receiving circuit and the transmission of second data with the filtering receiving circuit is that first-harmonic loading data signal sends, and receives data-signal through π type demodulation by filter amplification.This first video modulation differential transfer circuit adopts phase-locked loop frequency modulation transmissions vision signal, and the second video demodulator receiving circuit is through frequency translation demodulated video signal.On two core supply lines, adopt carrier system to make master control set and each terminal installation mutual data transmission, video, audio frequency sound, video, data-signal through the frequency division multiplexing principle; This polar protective circuit correcting for cross misconnection improves the stability of a system.This first power converting circuit and second source translation circuit are respectively applied for corresponding power supply to each circuit in master control set and the terminal are provided.The one CPU and the 2nd CPU are respectively applied for data are controlled and send and received to each circuit in master control set and the terminal.This first audio frequency processing circuit, second audio frequency processing circuit are respectively applied for that audio frequency is answered and audio frequency send words.
In the above-described embodiments, said supply unit connects said first polar protective circuit and second polar protective circuit through two heart yearns respectively.
More than to the utility model embodiment provided a kind of on two heart yearns the transmission audio, video data system carried out detailed introduction; For one of ordinary skill in the art; Thought according to the utility model embodiment; The part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (2)
- One kind on two heart yearns the transmission audio, video data system; It is characterized in that; Comprise: supply unit, master control set and be connected the terminal of said master control set; Said terminal is at least one; Said master control set comprises: first polar protective circuit, first data-modulated are sent and demodulation by filter receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit and a CPU; Wherein: said supply unit connects said first polar protective circuit; Said first data-modulated is sent and is connected said first polar protective circuit with demodulation by filter receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit respectively with first cpu circuit; Interconnect respectively between said first data transmission and filtering receiving circuit, the first video modulation differential transfer circuit, first audio frequency processing circuit, first power converting circuit; A said CPU connects said first data-modulated and sends and the demodulation by filter receiving circuit; Said terminal comprises: second polar protective circuit, second data-modulated are sent and demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, second source translation circuit and the 2nd CPU; Wherein: said supply unit connects said second polar protective circuit; Said second data-modulated is sent and is connected said second polar protective circuit respectively with demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, second source translation circuit and the 2nd CPU; Interconnect respectively between said second data-modulated transmission and demodulation by filter receiving circuit, the second video demodulator receiving circuit, second audio frequency processing circuit, the second source translation circuit, said the 2nd CPU connects said second data-modulated and sends and the demodulation by filter receiving circuit, and said second polar protective circuit connects said first polar protective circuit.
- 2. system according to claim 1 is characterized in that said supply unit connects said first polar protective circuit and second polar protective circuit through two heart yearns respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200229356U CN202514005U (en) | 2012-01-18 | 2012-01-18 | System for transmitting audio and video data on two core wires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200229356U CN202514005U (en) | 2012-01-18 | 2012-01-18 | System for transmitting audio and video data on two core wires |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202514005U true CN202514005U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200229356U Expired - Fee Related CN202514005U (en) | 2012-01-18 | 2012-01-18 | System for transmitting audio and video data on two core wires |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202514005U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103458227A (en) * | 2013-08-14 | 2013-12-18 | 厦门狄耐克电子科技有限公司 | Two-wire system transmission building visible walky-talky system |
| CN106506873A (en) * | 2016-09-30 | 2017-03-15 | 深圳市泛海三江电子股份有限公司 | Two-bus transmission device |
-
2012
- 2012-01-18 CN CN2012200229356U patent/CN202514005U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103458227A (en) * | 2013-08-14 | 2013-12-18 | 厦门狄耐克电子科技有限公司 | Two-wire system transmission building visible walky-talky system |
| CN106506873A (en) * | 2016-09-30 | 2017-03-15 | 深圳市泛海三江电子股份有限公司 | Two-bus transmission device |
| CN106506873B (en) * | 2016-09-30 | 2019-05-17 | 深圳市泛海三江电子股份有限公司 | Two-bus transmission device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20150118 |
|
| EXPY | Termination of patent right or utility model |