CN201365320Y - Digital video optical transmitter and receiver - Google Patents
Digital video optical transmitter and receiver Download PDFInfo
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- CN201365320Y CN201365320Y CNU2009201370369U CN200920137036U CN201365320Y CN 201365320 Y CN201365320 Y CN 201365320Y CN U2009201370369 U CNU2009201370369 U CN U2009201370369U CN 200920137036 U CN200920137036 U CN 200920137036U CN 201365320 Y CN201365320 Y CN 201365320Y
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Abstract
The utility model relates to digital video transmission facility, in particular to a digital video optical transmitter and receiver used for special optical fiber transmission video of industrial grade. The digital video optical transmitter and receiver comprises a digital video transmitter and a digital video receiver, wherein the digital video transmitter comprises a video input circuit, a pre-filter amplifier, an A/D converter, a time division multiplexing circuit, an audio input circuit, a switch signal input/output module, an Ethernet encoding/decoding module and an optical fiber receiving and transmitting circuit; and the digital video receiver comprises a PTZ control signal terminal, a video output circuit, a post-filter amplifier, a D/A converter, a time division multiplexing circuit, an audio output circuit, a switch signal input/output module, an Ethernet encoding/decoding module and an optical fiber transmitting and receiving circuit. In an Ethernet transmission mode, the digital video optical transmitter and receiver can packet and transmit data, therefore, not only the cost is lower, but also the bit error rate and the error correcting capability are greatly improved.
Description
Technical field
The utility model relates to digital video transmission equipment, relates in particular to a kind of digital video optical transceiver that is used for technical grade special optic fibre transmission of video.
Background technology
Optical transceiver is the transmission equipment in the optical communication system, mainly is to carry out opto-electronic conversion and transmission function.Generally be used for functions such as telecommunications, electric power, monitoring, Industry Control, video transmission, have a wide range of applications at industry-by-industry.The normal optical transceiver of saying refers to and is used for supervisory control system and is used for the optical transceiver of integrated informations such as transmission of video, data, Ethernet, audio frequency, mainly divide simulated light terminal and Digital Optical Terminal, the branch of single-mode optics terminal and multimode optical transceiver is arranged based on the difference of the medium that transmits.
Digital Optical Terminal is that want image transmitted, voice and data-signal are carried out digitized processing, again these digital signals is carried out multiplexing process, makes the digital signal of multi-path low speed convert one road high speed signal to, and this conversion of signals is become light signal.At receiving terminal light signal is reduced into the signal of telecommunication, the high speed signal of reduction decomposites original multi-path low speed signal, again these data-signals is reduced into image, voice and data-signal at last.The simulated light terminal is exactly that the signal that will transmit carries out amplitude or frequency modulation(FM) changes into light signal with the signal of telecommunication that modulates then.At receiving terminal light signal is reduced into the signal of telecommunication, again signal is carried out demodulation, restore image, voice or data-signal.
Digital Optical Terminal transmission signals quality height, intermodulation distortion when not having analog fm, phase modulation, the simultaneous interpretation of AM light terminal multiple signals seriously, easily affected by environment, transmission quality is inferior, the shortcoming of long-term working stability difference, therefore, Digital Optical Terminal will replace the simulated light terminal gradually.
Optical transceiver is used in the supervisory control system more, then adopts the optical transceiver of optical cable transmission when the coaxial cable transmission range is not enough.But optical transceiver not only transmission video signal can also transmitting audio signal.Promptly on-the-spot look audio frequency be transferred to control centre together, it is the most common that to utilize the example of optical transceiver be exactly the monitoring of crossroad.General these gamma cameras are from all several kilometers far away in control centre.Adopt optical transceiver to transmit when all can't reach distance with optical cable with copper cable+amplifier.
But the transmission means of present optical transceiver adopts and the string conversion regime, and the light signal of numeral is transmitted in optical fiber in common serial transmission mode.Though the noiseproof feature of optical transmission mode is good, but still there is the possibility of error code.And the serial transmission vision signal of general optical transceiver, audio signal be separately transmission generally, and without the packing transmission, does not more comprise digital control command signal.
The utility model content
The utility model is at above problem, and utilizes the transmission means of ripe Ethernet, proposes a kind of technical scheme of more excellent digital video optical transceiver:
Digital video optical transceiver of the present utility model comprises digital video transmitter and digital video receiver, wherein:
The digital video transmitter comprises video input circuit, pre-filtering amplifier, A/D converter, time multiplexing circuit, audio frequency input circuit, switching signal input/output module, Ethernet coding/decoding module and optical fiber transmission circuit; The Cloud Terrace decoder and described audio frequency input circuit, switching signal input/output module are connected in described time multiplexing circuit, be connected in described time multiplexing circuit again after described video input circuit, pre-filtering amplifier, A/D converter are connected in series in proper order, described time multiplexing circuit is connected in described Ethernet coding/decoding module successively and the optical fiber transmission circuit inserts Transmission Fibers again;
Digital video receiver comprises cradle head control signal end, video output circuit, post-filtering amplifier, D/A converter, time multiplexing circuit, audio output circuit, switching signal input/output module, Ethernet coding/decoding module and optical fiber transmission circuit; The Transmission Fibers signal inputs to optical fiber transmission circuit, Ethernet coding/decoding module and the time multiplexing circuit that connects successively, described time multiplexing circuit is connected to described cradle head control signal end, audio output circuit and switching signal input/output module, and described time multiplexing circuit also is connected to D/A converter, post-filtering amplifier, the video output circuit of order serial connection.
Further, described Ethernet coding/decoding module and Ethernet coding/decoding module adopt the circuit that RTL8201BL chip and ATR-B001C chip and peripheral cell are formed.
Further, the interface of described Ethernet coding/decoding module and Ethernet coding/decoding module adopts the RJ45 interface, and each paths of described RJ45 interface also is connected to electrical surge and absorbs device.
Further, described electrical surge absorption device is SDT3021.
Further, the controller of described time multiplexing circuit is to adopt CPLD programmable logic device chip.Its embedded time-division multiplexing unit is with vision signal, audio signal and the transmission of digital control instruction packing Ethernet.
Further, described CPLD programmable logic device chip is EPM240.
The utility model adopts the transmission means of Ethernet, can be to data packing transmission, therefore not only cost is lower, and the error rate and error correcting capability improve greatly, and with the Ethernet card interface compatibility of PC, make communication more convenient.
Description of drawings
Fig. 1 is application principle figure of the present utility model;
Fig. 2 is the theory diagram of digital video transmitter of the present utility model;
Fig. 3 is the theory diagram of digital video receiver of the present utility model;
Fig. 4 is the circuit theory diagrams of Ethernet coding/decoding module of the present utility model;
Fig. 5 is the circuit theory diagrams of Ethernet interface part of the present utility model;
Fig. 6 is the schematic diagram of controller part of the present utility model.
Embodiment
Existing accompanying drawings and embodiment further specify the utility model.
Consulting shown in Figure 1 is application mode principle of the present utility model.The digital video transmitter is connected to camera, The Cloud Terrace decoder, audio frequency and switching signal output, camera is used to obtain video signal, the The Cloud Terrace decoder is used for the camera The Cloud Terrace decoded and drive horizontal stage electric machine rotating, audio frequency is connected to microphone and obtains audio signal, and switching signal output is opened to close to each passage and controlled.The digital video transmitter also is connected communication by Transmission Fibers with digital video receiver.Digital video receiver is connected to monitor, cradle head control signal, audio frequency transceiver and switch control, monitor is the graphic display terminal of vision signal, the cradle head control signal is the command signal to the control of The Cloud Terrace, the audio frequency transceiver is the expression terminal of sound, and switch control then is the control signal of each passage.
Digital video optical transceiver of the present utility model comprises digital video transmitter and digital video receiver.Consult shown in Figure 2ly, the digital video transmitter comprises video input circuit 2, pre-filtering amplifier 3, A/D converter 4, time multiplexing circuit 5, audio frequency input circuit 6, switching signal input/output module 7, Ethernet coding/decoding module 8 and optical fiber transmission circuit 9; The Cloud Terrace decoder 1 and described audio frequency input circuit 6, switching signal input/output module 7 are connected in described time multiplexing circuit 5, be connected in described time multiplexing circuit 5 again after described video input circuit 2, pre-filtering amplifier 3, the A/D converter 4 order serial connections, described time multiplexing circuit 5 is connected in described Ethernet coding/decoding module 8 successively and optical fiber transmission circuit 9 inserts Transmission Fibers again;
Consult shown in Figure 3ly, digital video receiver comprises cradle head control signal end 13, video output circuit 16, post-filtering amplifier 15, D/A converter 14, time multiplexing circuit 12, audio output circuit 17, switching signal input/output module 18, Ethernet coding/decoding module 11 and optical fiber transmission circuit 10; The Transmission Fibers signal inputs to optical fiber transmission circuit 10, Ethernet coding/decoding module 11 and the time multiplexing circuit 12 that connects successively, described time multiplexing circuit 12 is connected to described cradle head control signal end 13, audio output circuit 17 and switching signal input/output module 18, and described time multiplexing circuit 12 also is connected to D/A converter 14, post-filtering amplifier 15, the video output circuit 16 of order serial connection.
Consult shown in Figure 4, the circuit that described Ethernet coding/decoding module 8 and Ethernet coding/decoding module 11 adopts network interface card chip for driving RTL8201BL chips and bidirectional transmit-receive chip ATR-B001C chip and peripheral cell to form.The operating current of RTL8201BL chip and ATR-B001C chip is 3.3V, and the oscillating circuit of RTL8201BL chip is to provide stable work schedule by the oscillating circuit that 3 electric capacity, 1 inductance and 1 crystal oscillator constitute.
Consult shown in Figure 5ly, the interface of described Ethernet coding/decoding module 8 and Ethernet coding/decoding module 11 adopts the RJ45 interface, and each paths of described RJ45 interface also is connected to electrical surge and absorbs device.It is to adopt SDT3021 that electrical surge in the most preferred embodiment of the present utility model absorbs device, and it is that a kind of low capacitor transient stage surge absorbs components and parts.
Consult shown in Figure 6ly, the controller of described time multiplexing circuit is to adopt CPLD programmable logic device chip.Its embedded time division multiplexing processing unit is with vision signal, audio signal and digital control instruction packing transmission.Described CPLD programmable logic device chip is EPM240, can pass through Programming Design relevant hardware function.
The working dc power of each circuit chip is the typical circuit that constitutes by power source special chip AMS1086-3.3V and inductance thereof, electric capacity peripheral cell.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (6)
1. a digital video optical transceiver comprises digital video transmitter and digital video receiver, it is characterized in that:
The digital video transmitter comprises video input circuit (2), pre-filtering amplifier (3), A/D converter (4), time multiplexing circuit (5), audio frequency input circuit (6), switching signal input/output module (7), Ethernet coding/decoding module (8) and optical fiber transmission circuit (9); The Cloud Terrace decoder (1) and described audio frequency input circuit (6), switching signal input/output module (7) are connected in described time multiplexing circuit (5), be connected in described time multiplexing circuit (5) again after described video input circuit (2), pre-filtering amplifier (3), A/D converter (4) the order serial connection, described time multiplexing circuit (5) is connected in described Ethernet coding/decoding module (8) successively and optical fiber transmission circuit (9) inserts Transmission Fibers again;
Digital video receiver comprises cradle head control signal end (13), video output circuit (16), post-filtering amplifier (15), D/A converter (14), time multiplexing circuit (12), audio output circuit (17), switching signal input/output module (18), Ethernet coding/decoding module (11) and optical fiber transmission circuit (10); The Transmission Fibers signal inputs to optical fiber transmission circuit (10), Ethernet coding/decoding module (11) and the time multiplexing circuit (12) that connects successively, described time multiplexing circuit (12) is connected to described cradle head control signal end (13), audio output circuit (17) and switching signal input/output module (18), and described time multiplexing circuit (12) also is connected to D/A converter (14), post-filtering amplifier (15), the video output circuit (16) of order serial connection.
2. digital video optical transceiver according to claim 1 is characterized in that: the circuit that described Ethernet coding/decoding module (8) and Ethernet coding/decoding module (11) adopt RTL8201BL chip and ATR-B001C chip and peripheral cell to form.
3. digital video optical transceiver according to claim 1, it is characterized in that: the interface of described Ethernet coding/decoding module (8) and Ethernet coding/decoding module (11) adopts the RJ45 interface, and each paths of described RJ45 interface also is connected to electrical surge and absorbs device.
4. digital video optical transceiver according to claim 3 is characterized in that: it is SDT3021 that described electrical surge absorbs device.
5. digital video optical transceiver according to claim 1 is characterized in that: the controller of described time multiplexing circuit is to adopt CPLD programmable logic device chip.
6. digital video optical transceiver according to claim 5 is characterized in that: described CPLD programmable logic device chip is EPM240.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201370369U CN201365320Y (en) | 2009-03-06 | 2009-03-06 | Digital video optical transmitter and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201370369U CN201365320Y (en) | 2009-03-06 | 2009-03-06 | Digital video optical transmitter and receiver |
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| Publication Number | Publication Date |
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| CN201365320Y true CN201365320Y (en) | 2009-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2009201370369U Expired - Fee Related CN201365320Y (en) | 2009-03-06 | 2009-03-06 | Digital video optical transmitter and receiver |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902621A (en) * | 2010-08-22 | 2010-12-01 | 武汉虹信通信技术有限责任公司 | Multi-channel video optical transceiver system capable of realizing video output switching without external matrix |
| CN103139538A (en) * | 2011-11-29 | 2013-06-05 | 北京航天长峰科技工业集团有限公司 | Alarming and video signal transmission device |
| CN103313044A (en) * | 2013-06-28 | 2013-09-18 | 成都思迈科技发展有限责任公司 | Video optical transceiver with waterproof function |
| CN103379260A (en) * | 2012-04-25 | 2013-10-30 | 深圳市盖视科技有限公司 | Surveillance camera transmitting video signals based on optical fibers and method for transmitting video images |
| CN104104893A (en) * | 2013-04-07 | 2014-10-15 | 北京同步科技有限公司 | Device capable of carrying out remote transmission on mixed signals simultaneously through single optical fiber and transmission method |
| CN104639919A (en) * | 2013-11-14 | 2015-05-20 | 杭州海康威视数字技术股份有限公司 | Data transmission method and data transmission system for digital video optical transceiver system |
| CN114448551A (en) * | 2022-01-20 | 2022-05-06 | 中国电子科技集团公司第二十八研究所 | Distributed serial matrix switching system based on passive wavelength division multiplexing |
-
2009
- 2009-03-06 CN CNU2009201370369U patent/CN201365320Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902621A (en) * | 2010-08-22 | 2010-12-01 | 武汉虹信通信技术有限责任公司 | Multi-channel video optical transceiver system capable of realizing video output switching without external matrix |
| CN101902621B (en) * | 2010-08-22 | 2012-09-05 | 武汉烽火众智数字技术有限责任公司 | Multi-channel video optical transceiver system capable of realizing video output switching without external matrix |
| CN103139538A (en) * | 2011-11-29 | 2013-06-05 | 北京航天长峰科技工业集团有限公司 | Alarming and video signal transmission device |
| CN103379260A (en) * | 2012-04-25 | 2013-10-30 | 深圳市盖视科技有限公司 | Surveillance camera transmitting video signals based on optical fibers and method for transmitting video images |
| CN104104893A (en) * | 2013-04-07 | 2014-10-15 | 北京同步科技有限公司 | Device capable of carrying out remote transmission on mixed signals simultaneously through single optical fiber and transmission method |
| CN103313044A (en) * | 2013-06-28 | 2013-09-18 | 成都思迈科技发展有限责任公司 | Video optical transceiver with waterproof function |
| CN104639919A (en) * | 2013-11-14 | 2015-05-20 | 杭州海康威视数字技术股份有限公司 | Data transmission method and data transmission system for digital video optical transceiver system |
| CN104639919B (en) * | 2013-11-14 | 2017-11-03 | 杭州海康威视数字技术股份有限公司 | Data transmission method and its system for digital video fiber optic transmitter system |
| CN114448551A (en) * | 2022-01-20 | 2022-05-06 | 中国电子科技集团公司第二十八研究所 | Distributed serial matrix switching system based on passive wavelength division multiplexing |
| CN114448551B (en) * | 2022-01-20 | 2023-08-25 | 中国电子科技集团公司第二十八研究所 | Distributed serial matrix switching system based on passive wavelength division multiplexing |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20091216 Termination date: 20150306 |
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| EXPY | Termination of patent right or utility model |