CN205510270U - Short distance video wireless communication system - Google Patents
Short distance video wireless communication system Download PDFInfo
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- CN205510270U CN205510270U CN201620000518.XU CN201620000518U CN205510270U CN 205510270 U CN205510270 U CN 205510270U CN 201620000518 U CN201620000518 U CN 201620000518U CN 205510270 U CN205510270 U CN 205510270U
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Abstract
The utility model provides a short distance video wireless communication system, including first camera, second camera, an emission module, the 2nd emission module, receiving module and third display, an emission module includes the 2nd consecutive the control unit, the 2nd receiving element and the 2nd emission unit including the the control unit and the emission unit that link to each other, the 2nd emission module, and receiving module is including the 3rd the control unit and the receiving element that link to each other, first camera connects an emission module's input, and the second camera connects the 2nd emission module's input, and the third display is connected to receiving module's output.
Description
Technical field
This utility model relates to wireless communication field, is specifically related to a kind of short distance video wireless communication system.
Background technology
Radio communication (Wireless Communication) is a kind of communication mode that the characteristic utilizing electromagnetic wave signal to propagate in free space carries out information exchange, in recent years in the information communications field, with fastest developing speed, most widely used is exactly wireless communication technology；The radio communication realized in movement is commonly referred to as again mobile communication, and people are collectively referred to as wireless mobile communications the two, and present modal mobile phone terminal is exactly the derivant of this technology；The wireless communication technology of video is the most ripe, but lacks in daily research learning and realize simply, the product mix that cost is relatively low.
Utility model content
In order to solve problems of the prior art, this utility model provides a kind of short distance video wireless communication system.
A kind of short distance video wireless communication system of the present utility model adopts the technical scheme that: include the first photographic head, second camera, the first transmitter module, the second transmitter module, receiver module and the 3rd display；Described first transmitter module includes the first control unit and the first transmitter unit being connected, described second transmitter module includes the second control unit, the second reception unit and the second transmitter unit being sequentially connected, and described receiver module includes that the 3rd control unit being connected and first receives unit；Described first photographic head connects the input of the first transmitter module, and described second camera connects the input of the second transmitter module, and the outfan of described receiver module connects the 3rd display.
Described first transmitter module also includes that the first overlaying character unit, described first overlaying character unit are connected with the first control unit and the first transmitter unit respectively.
Described second transmitter module also includes that the second overlaying character unit, described second overlaying character unit are connected with the second control unit and the second transmitter unit respectively.
The outfan of described first photographic head is provided with the first display, and the outfan of described second camera is provided with second display.
Described first control unit and the second control unit are STM32F103C8T6 chip.
Described first transmitter unit and the second transmitter unit are TX6729 monophonic audio frequency and video transmitter module.
It is RX6788 stereo sound video reception module that described first reception unit and second receives unit.
Described first transmitter module, the second transmitter module and receiver module are respectively provided with toggle switch.
Described first overlaying character unit and the second overlaying character unit are MAX7456 chip.
This utility model has the advantage that relative to prior art
1, structure of the present utility model design is simple, easily realizes, and overall power is relatively low.
2, transmission of video of the present utility model is clear, without obvious distortion, it is possible to for short range wireless transmission video.
Accompanying drawing explanation
Fig. 1 is the structural representation of utility model；
Fig. 2 is the flow chart of character adding.
Detailed description of the invention
Below in conjunction with accompanying drawing, a kind of short distance video wireless communication system of the present utility model is described in further detail.
As it is shown in figure 1, a kind of short distance video wireless communication system of the present utility model, including the first photographic head, second camera, the first transmitter module, the second transmitter module, receiver module and the 3rd display；First transmitter module includes the first control unit and the first transmitter unit being connected, second transmitter module includes the second control unit, the second reception unit and the second transmitter unit being sequentially connected, and receiver module includes that the 3rd control unit being connected and first receives unit；First photographic head connects the input of the first transmitter module, and second camera connects the input of the second transmitter module, and the outfan of receiver module connects the 3rd display.First transmitter module also includes that the first overlaying character unit, the first overlaying character unit are connected with the first control unit and the first transmitter unit respectively.Second transmitter module also includes that the second overlaying character unit, the second overlaying character unit are connected with the second control unit and the second transmitter unit respectively.The outfan of the first photographic head is provided with the first display, and the outfan of second camera is provided with second display.
First control unit and the second control unit are STM32F103C8T6 chip.First transmitter unit and the second transmitter unit are TX6729 monophonic audio frequency and video transmitter module.It is RX6788 stereo sound video reception module that first reception unit and second receives unit.First transmitter module, the second transmitter module and receiver module are respectively provided with toggle switch.First overlaying character unit and the second overlaying character unit are MAX7456 chip.
This utility model has made two wireless video transmitting nodes and a receiving node, two launch points are launched in the frequency range of 2414MHZ and 2468MHZ after being utilized respectively the video signal modulation that color simulation camera collection arrives by wireless video transmitter module TX6729 simultaneously, receiver module RX6788 at receiving node selects corresponding band to receive one of them video signal, then output shows to television set.By STM32 microprocessor controls character overlap chip MAX7456 in character adding to video before this external video transmission, 3V battery supply is that two transmitting nodes are powered after boosting to 5V, provides power supply with 9V battery for photographic head simultaneously.System achieves two launch points and launches video simultaneously, and is receiving the some content by the switch arbitrary launch point of display；Launch and receive the point clear flicker free of video that television set shows at a distance of 10 meters time, color normally, be directly connected to the picture quality no significant difference of television set with photographic head with AV cable.
After video signal is exported the first transmitter module by AV cable by colour imagery shot, the second transmitter module it is wirelessly transmitted to after high frequency modulated, second transmitter module is sent to receiver module after being demodulated by the signal received in the same fashion, and last receiver module directly inputs video signal and shows to television set.What this used has the video of the photographic head output that AV exports is analogue signal, and available video transmitter module is directly launched, and uses the receiver module of coupling to be directly output to television set after receiving at receiving terminal, and circuit and the programming of system are simple.
Video signal transmitting reception scheme:
Scheme 1: use single analog video signal to be wirelessly transferred device and set up transmitting and receive circuit.Program advantage is can to design the transmission circuit of low-power consumption as much as possible, thus reduces the power consumption of module, but high-frequency signal transmission circuit to design and produce difficulty big, be difficult to realize.
Scheme 2: directly use ready-made wireless video receiving module, transceiver module can directly be launched by AV socket and be received AV shifted color burst signal into burst interval of analog color video signal, and transmitting and reception frequency have multiple choices, avoid the interference between different channels, and circuit connects and debugging is simple, but the shortcoming of maximum to be power consumption bigger.
Consider simplicity and the feasibility of design, monophonic audio frequency and video transmitter module and the RX6788 body audio visual receiver module using model to be TX6729, transmitting-receiving frequency can be at 2414MHZ, 2432MHZ, selecting between 2450MHZ, 2468MHZ, launching power consumption under electric rating is 50mW, maximum transmission distance, up to 200 meters, can launch power consumption to meet requirement from Row sum-equal matrix time actually used.
Character adding scheme:
Scheme 1: use the UPD6453 character overlap chip of NEC Corporation, it can at most show that on screen 12 row * 24 arrange totally 288 characters, and each character is made up of 12*18 dot matrix.Can there be 256 kinds of fonts, and there is character blinking function.Need following peripheral circuit: row, field synchronization split circuit module, micro controller module, latch module and character library circuit module etc., peripheral chip and device are more, and circuit cost is higher.
Scheme 2: use the single channel of MAXIM Maxim release, monochrome with screen display (OSD) generator MAX7456.The modules such as the outer synchronization video of this integrated chip drives, demultiplexer, video switching EEPROM, greatly reduce the complexity of peripheral circuit.Can automatically identify NTSC and pal signal simultaneously, AV video can be directly inputted.
This utility model uses MAX7456 as character overlap chip.
The selection of controller:
Scheme one: control wireless receiving and dispatching and character adding system based on tradition 80C51 single-chip microcomputer 8 bit processor, 80C51 comparative maturity, programs relatively simple, and 51 single-chip microcomputers are more universal simultaneously, cheap, learning materials are the most, it is easy to autonomous study and grasp, but the hardware interface being internally integrated is few, such as SPI, according to the mode of simulation, speed is slow, not ideal enough.
Scheme two: use FPGA to make master controller, FPGA complete the core calculations of the bottoms such as signal sampling and processing, do main control chip, calculate speed fast, powerful.Shortcoming: cost is high, makes time-consuming long, wayward.
Scheme three: use the ARM32 position STM32F103 series processors of current main flow, peripheral interface enriches, resource is many, function is programmed with built-in function, considerably increasing development efficiency, and price comparison is cheap, cost performance is high, and be the processor of low-power consumption, meet far away the requirement of video Wireless transceiver.
This utility model uses scheme three to do main control chip with STM32F103C8T6.
Model be the monophonic audio frequency and video transmitter module of TX6729 and RX6788 stereo-audio frequency and video receiver module, transmitting-receiving frequency can be at 2414MHZ, 2432MHZ, 2450MHZ, selecting between 2468MHZ, launching power consumption under electric rating is 50mW, and maximum transmission distance is up to 200 meters.Power consumption can be launched to meet topic requirements from Row sum-equal matrix time actually used.
Circuit and programming:
1, booster circuit
Use linear voltage stabilization chip F159 to transfer 3V cell voltage to 5V voltage, be the first transmitter module and the second transmitter module is powered.
Character adding circuit
Single-chip microcomputer sends control instruction by SPI serial line interface to averager, such as display pattern, reads character memory etc., and MAX7456 is according to MCU Instruction amendment or reads the character in character memory, and by image, shows and specifying on position after character adding.Camera collection to video signal received the VIN pin of MAX7456 by Flos Nelumbinis RCA socket, receive wireless transmitter module with Flos Nelumbinis RCA socket equally through mixed video.
2, wireless transmitter receiver circuit
First transmitter module and the second transmitter module use identical wireless transmitter module to transmit respective video signal, and in order to avoid interfering between different channels in transmitting procedure, the transmitter module of two nodes can be selected for different tranmitting frequencies.Can select 2414MHZ at transmitting terminal by toggle switch, one of them tranmitting frequency of 2432MHZ, 2450MHZ, 2468MHZ, receiving terminal selects corresponding reception frequency also with toggle switch, thus determines to show the video of A or B.
As in figure 2 it is shown, in character adding program circuit, after system initialization, acquiescence does not carry out character adding (flag bit cnt=0), the mark position 1 when scanning button and pressing, and carries out character adding, mark position 0 when again pushing button, and cancels character adding.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (9)
1. a short distance video wireless communication system, is characterised by: include the first photographic head, second camera, the first transmitter module, the second transmitter module, receiver module and the 3rd display；Described first transmitter module includes the first control unit and the first transmitter unit being connected, described second transmitter module includes the second control unit, the second reception unit and the second transmitter unit being sequentially connected, and described receiver module includes that the 3rd control unit being connected and first receives unit；Described first photographic head connects the input of the first transmitter module, and described second camera connects the input of the second transmitter module, and the outfan of described receiver module connects the 3rd display.
2. a kind of short distance video wireless communication system as claimed in claim 1, it is characterised in that: described first transmitter module also includes that the first overlaying character unit, described first overlaying character unit are connected with the first control unit and the first transmitter unit respectively.
3. a kind of short distance video wireless communication system as claimed in claim 2, it is characterised in that: described second transmitter module also includes that the second overlaying character unit, described second overlaying character unit are connected with the second control unit and the second transmitter unit respectively.
4. a kind of short distance video wireless communication system as claimed in claim 3, it is characterised in that: the outfan of described first photographic head is provided with the first display, and the outfan of described second camera is provided with second display.
5. a kind of short distance video wireless communication system as according to any one of Claims 1-4, it is characterised in that: described first control unit and the second control unit are STM32F103C8T6 chip.
6. a kind of short distance video wireless communication system as according to any one of Claims 1-4, it is characterised in that: described first transmitter unit and the second transmitter unit are TX6729 monophonic audio frequency and video transmitter module.
7. a kind of short distance video wireless communication system as according to any one of Claims 1-4, it is characterised in that: it is RX6788 stereo sound video reception module that described first reception unit and second receives unit.
8. a kind of short distance video wireless communication system as according to any one of Claims 1-4, it is characterised in that: described first transmitter module, the second transmitter module and receiver module are respectively provided with toggle switch.
9. a kind of short distance video wireless communication system as claimed in claim 3, it is characterised in that: described first overlaying character unit and the second overlaying character unit are MAX7456 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620000518.XU CN205510270U (en) | 2016-01-03 | 2016-01-03 | Short distance video wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620000518.XU CN205510270U (en) | 2016-01-03 | 2016-01-03 | Short distance video wireless communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205510270U true CN205510270U (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620000518.XU Expired - Fee Related CN205510270U (en) | 2016-01-03 | 2016-01-03 | Short distance video wireless communication system |
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| Country | Link |
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| CN (1) | CN205510270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114071029A (en) * | 2020-08-06 | 2022-02-18 | 贵州工程应用技术学院 | Short-distance video transmission system based on wireless transmission technology |
-
2016
- 2016-01-03 CN CN201620000518.XU patent/CN205510270U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114071029A (en) * | 2020-08-06 | 2022-02-18 | 贵州工程应用技术学院 | Short-distance video transmission system based on wireless transmission technology |
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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: 20160824 Termination date: 20190103 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |