CN205490813U - Video analog signal treatment circuit - Google Patents
Video analog signal treatment circuit Download PDFInfo
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- CN205490813U CN205490813U CN201620098496.5U CN201620098496U CN205490813U CN 205490813 U CN205490813 U CN 205490813U CN 201620098496 U CN201620098496 U CN 201620098496U CN 205490813 U CN205490813 U CN 205490813U
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Abstract
The utility model discloses a treatment circuit, in particular to video analog signal treatment circuit. The utility model discloses an including following module: multiway switch: be used for receiving multichannel video analog signal, under single -chip microcomputer module control, with signal transmission to digital analog conversion module, analog -to -digital conversion module: it transmits single -chip module to to convert video analog signal into video digital signal, single -chip module: handle back, the digital analog conversion module of redispatching with received video digital signal, the digital analog conversion module: convert received video digital signal into the video analog signal filter circuit that redispatches, filter circuit: the video analog signal that comes digital analog conversion module transmission handles back output, converts video analog signal into data signal effectively and handles the back reconversion and for video analog signal, realized multipath simulation signal timesharing conversion through the many -way selection moreover.
Description
Technical field
The present invention relates to a kind of process circuit, process circuit particularly to a kind of video analog signal.
Background technology
Video analog signal refers to that each two field picture is the actual image signal of the natural scene obtained in real time.Video analog signal has low cost and the advantage such as Well-recovered, and video pictures often gives a kind of sensation on the spot in person of people.But its disadvantage is no matter that the image being recorded is how well, after long range propagation, the quality of the picture of video all can be substantially reduced, or after multiple copies, the distortion of picture will be clearly.
Simultaneously, it is many that video analog signal takies resource, stores and retrieves inconvenience, when transmission range is long, signal generation attenuation, distortion, group delay, and easily it is disturbed, makes image quality decrease, secondly, when wired analog signal is in monitoring device, cannot connect to the Internet, can only monitoring site in a point-to-point fashion, make installation work amount huge.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of prior art, it is provided that a kind of video analog signal processes circuit.
In order to realize foregoing invention purpose, the invention provides techniques below scheme:
A kind of video analog signal processes circuit, including with lower module: variable connector: be used for receiving multi-channel video analogue signal, under one-chip computer module control, transfer signals to D/A converter module；Analog-to-digital conversion module: video analog signal is converted to video signal and is transferred to one-chip computer module；One-chip computer module: after being processed by the video signal received, re-send to D/A converter module；D/A converter module: the video signal received is converted to video analog signal and re-sends to filter circuit；Filter circuit: video analog signal D/A converter module transmitted exports after processing.
Variable connector uses 4051 interface circuits, and the control end of 4051 connects single-chip microcomputer, and 4051 have low conduction impedance and the lowest by leakage current, it is ensured that the stability of signal.
Analog-to-digital conversion module uses ADC0809, the channel address Strobe input of ADC0809 is connected with single-chip microcomputer by latch 74LS373, ADC0809 has 8 path analoging switch and associating addressing logic, itself IN0～IN7 is input end of analog signal, FPDP D0～D7 is directly connected to the data/address bus of single-chip microcomputer, it is achieved data are transmitted.
One-chip computer module uses AT89C51, is compressed digital video signal processing.
D/A converter module uses DAC0832, DAC0832 is 8 parallel-by-bit interface CMOS integrated circuits, also the data/address bus with single-chip microcomputer is joined directly together, it uses single buffer working method, internal input register can latch the data that monolithic is sent here, after digital video information runs up to certain data volume, exported by two delivery outlet through conversion.
Filter circuit uses two integrated transporting discharging LM324, the input of integrated transporting discharging U10A connects the outfan of D/A converter module, the outfan of integrated transporting discharging U10A is connected to the negative input end of integrated transporting discharging U10B by resistance R8, the positive input terminal ground connection of integrated transporting discharging U10B, the negative input end of integrated transporting discharging U10B is connected to its outfan by resistance R7, the outfan of integrated transporting discharging U10B passes through load resistance R9 output signal, the two ends of load resistance R9 are respectively by electric capacity C4 and C5 ground connection, DAC0832 belongs to current mode output, filter circuit is first converted into voltage output, glitch-free video analog signal is exported after being filtered by electric capacity C4 and C5.
Compared with prior art, beneficial effects of the present invention: video analog signal is converted to be reconverted into after digital signal processes video analog signal effectively, and achieves multichannel analog signals timesharing by multi-path choice and change.
Accompanying drawing illustrates:
Fig. 1 is native system complete schematic；
Fig. 2 is variable connector schematic diagram；
Fig. 3 is analog-to-digital conversion module and one-chip computer module catenation principle figure；
Fig. 4 is D/A converter module and one-chip computer module catenation principle figure；
Fig. 5 is filter circuit schematic diagram.
Detailed description of the invention
Below in conjunction with test example and detailed description of the invention, the present invention is described in further detail.But this should not being interpreted as, the scope of the above-mentioned theme of the present invention is only limitted to below example, and all technology realized based on present invention belong to the scope of the present invention.
Embodiment
A kind of video analog signal processes circuit, including with lower module: variable connector: be used for receiving multi-channel video analogue signal, under one-chip computer module control, transfer signals to D/A converter module；Analog-to-digital conversion module: video analog signal is converted to video signal and is transferred to one-chip computer module；One-chip computer module: after being processed by the video signal received, re-send to D/A converter module；D/A converter module: the video signal received is converted to video analog signal and re-sends to filter circuit；Filter circuit: video analog signal D/A converter module transmitted exports after processing.
Variable connector uses 4051 interface circuits, and the control end of 4051 connects single-chip microcomputer, and 4051 have low conduction impedance and the lowest by leakage current, it is ensured that the stability of signal.
Analog-to-digital conversion module uses ADC0809, the channel address Strobe input of ADC0809 is connected with single-chip microcomputer by latch 74LS373, ADC0809 has 8 path analoging switch and associating addressing logic, itself IN0～IN7 is input end of analog signal, FPDP D0～D7 is directly connected to the data/address bus of single-chip microcomputer, it is achieved data are transmitted.
One-chip computer module uses AT89C51, is compressed digital video signal processing.
D/A converter module uses DAC0832, DAC0832 is 8 parallel-by-bit interface CMOS integrated circuits, also the data/address bus with single-chip microcomputer is joined directly together, it uses single buffer working method, internal input register can latch the data that monolithic is sent here, after digital video information runs up to certain data volume, exported by two delivery outlet through conversion.
Filter circuit uses two integrated transporting discharging LM324, the input of integrated transporting discharging U10A connects the outfan of D/A converter module, the outfan of integrated transporting discharging U10A is connected to the negative input end of integrated transporting discharging U10B by resistance R8, the positive input terminal ground connection of integrated transporting discharging U10B, the negative input end of integrated transporting discharging U10B is connected to its outfan by resistance R7, the outfan of integrated transporting discharging U10B passes through load resistance R9 output signal, the two ends of load resistance R9 are respectively by electric capacity C4 and C5 ground connection, DAC0832 belongs to current mode output, filter circuit is first converted into voltage output, glitch-free video analog signal is exported after being filtered by electric capacity C4 and C5.
Claims (6)
1. a video analog signal processes circuit, it is characterised in that include with lower module:
Variable connector: be used for receiving multi-channel video analogue signal, under one-chip computer module control, transfer signals to D/A converter module；
Analog-to-digital conversion module: video analog signal is converted to video signal and is transferred to one-chip computer module；
One-chip computer module: after being processed by the video signal received, re-send to D/A converter module；
D/A converter module: the video signal received is converted to video analog signal and re-sends to filter circuit；
Filter circuit: video analog signal D/A converter module transmitted exports after processing.
A kind of video analog signal the most according to claim 1 processes circuit, it is characterised in that described variable connector uses 4051 interface circuits, the control end of 4051 to connect single-chip microcomputer.
A kind of video analog signal the most according to claim 1 processes circuit, it is characterised in that described analog-to-digital conversion module uses the channel address Strobe input of ADC0809, ADC0809 to be connected with single-chip microcomputer by latch 74LS373.
A kind of video analog signal the most according to claim 1 processes circuit, it is characterised in that described one-chip computer module uses AT89C51.
A kind of video analog signal the most according to claim 1 processes circuit, it is characterised in that described D/A converter module uses DAC0832.
A kind of video analog signal the most according to claim 1 processes circuit, it is characterized in that, described filter circuit uses two integrated transporting discharging LM324, the input of integrated transporting discharging U10A connects the outfan of D/A converter module, the outfan of integrated transporting discharging U10A is connected to the negative input end of integrated transporting discharging U10B by resistance R8, the positive input terminal ground connection of integrated transporting discharging U10B, the negative input end of integrated transporting discharging U10B is connected to its outfan by resistance R7, the outfan of integrated transporting discharging U10B passes through load resistance R9 output signal, the two ends of load resistance R9 are respectively by electric capacity C4 and C5 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620098496.5U CN205490813U (en) | 2016-02-01 | 2016-02-01 | Video analog signal treatment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620098496.5U CN205490813U (en) | 2016-02-01 | 2016-02-01 | Video analog signal treatment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205490813U true CN205490813U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620098496.5U Expired - Fee Related CN205490813U (en) | 2016-02-01 | 2016-02-01 | Video analog signal treatment circuit |
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| CN (1) | CN205490813U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107948613A (en) * | 2017-12-29 | 2018-04-20 | 北京九方广维科技有限公司 | Multi-path camera shares switching circuit and intercom system and shares method for sharing |
-
2016
- 2016-02-01 CN CN201620098496.5U patent/CN205490813U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107948613A (en) * | 2017-12-29 | 2018-04-20 | 北京九方广维科技有限公司 | Multi-path camera shares switching circuit and intercom system and shares method for sharing |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guo Jiamao Inventor before: Wu Kai Inventor before: Liu Fei Inventor before: Zhang Jian Inventor before: Li Cheng |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160923 Address after: 410205, Hunan Changsha high tech Development Zone, Hunan, Tongzi slope West Road, 328 people printing Co., Ltd. research and exhibition floor, first floor Patentee after: Hunan nine days XinDa communications equipment Co., Ltd. Address before: 610041 Sichuan province Chengdu Tianfu four Street No. 66 Building 2 floor 8 No. 3 Patentee before: CHENGDU KECHUANGGU TECHNOLOGY CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20210201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |