CN103347183A - Digital video optical transmitter - Google Patents
Digital video optical transmitter Download PDFInfo
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- CN103347183A CN103347183A CN2013102663175A CN201310266317A CN103347183A CN 103347183 A CN103347183 A CN 103347183A CN 2013102663175 A CN2013102663175 A CN 2013102663175A CN 201310266317 A CN201310266317 A CN 201310266317A CN 103347183 A CN103347183 A CN 103347183A
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- time division
- division multiplexer
- digital video
- coupler
- modulator
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Abstract
The invention discloses a digital video optical transmitter. The digital video optical transmitter comprises a conversion module and a radio frequency module. A serial data output end of the conversion module is connected with a modulation input end of the radio frequency module. The conversion module comprises a time division multiplexer and a coder. The radio frequency module comprises a modulator and a coupler. The time division multiplexer is connected with a front-end video output port. The coder is connected with the time division multiplexer. A signal output end of the modulator is connected with a signal input end of the coupler. A plurality of vidicons at the front end enable shot image information to be accessed to the time division multiplexer through the video output port, the time division multiplexer enables a plurality of low-speed data flows to be combined into a single high-speed data flow, and the single high-speed data flow enters the coder and is converted into signals which can be transmitted. The modulator modulates the transmitted signals into stable high-radio-frequency oscillation signals. At last, electric signals are converted into optical signals to be coupled into an optical fiber under the action of the coupler.
Description
Technical field
The present invention relates to the computer network transmission technology, specifically refer to a kind of digital video optical sender.
Background technology
Video optical multiplexer is exactly the equipment that becomes 1 road light signal to transmit by fiber medium by various code conversion to the analog video signal of multichannel.Because vision signal converts to can be by analog-converted and two kinds of technology of digital translation, so comprise simulated light terminal and Digital Optical Terminal on the market in the process of light signal.The simulated light terminal adopts base band/AM/FM/PFM modulation technique to implement the transmission diagram image signal, and transmitting terminal is carrying out the electrical-optical conversion after analog video signal is carried out the PFM modulation earlier, light signal passes to receiving terminal, carry out light-electricity conversion, carry out the PFM demodulation then, reply vision signal.Because digital technology is compared a lot of aspects with traditional analogue technique and is all had remarkable advantages, so the digitlization of optical transceiver will be a kind of inexorable trend.
At present, Digital Optical Terminal is the most common to be Digital Optical Terminal in MPEG II image compression mode, and it can become image compression the data flow of N*2Mbps, by the transmission of standard telecommunication interface or direct Optical Fiber Transmission.Owing to adopted Image Compression, it can reduce the signal transmission bandwidth greatly, is beneficial to take less resource and just can transmits picture signal.Simultaneously, owing to adopted the standard interface of N*2Mbps, can utilize the rich channel transfer monitoring image of existing telecom transmissioning equipment, for the engineering application brings convenience.But the image compression Digital Optical Terminal has the defective of a maximum, can not guarantee the real-time of image transmission exactly, because need the regular hour when image compression and decompress(ion), image transmitted is had several seconds time-delay, and the scope of application is less; And image after compression can produce certain distortion, and price is high, should not promote the use of.
Summary of the invention
The present invention solves problems such as traditional optical transceiver transmission delay by a kind of digital video optical sender is set, and reaches the purpose of real-time transmission data.
Purpose of the present invention reaches by the following technical programs:
The present invention includes modular converter and radio-frequency module, the serial data output of modular converter links to each other with the modulation input of radio-frequency module, described modular converter comprises time division multiplexer and encoder, described radio-frequency module comprises modulator and coupler, encoder links to each other with time division multiplexer, and the signal output part of described modulator links to each other with the signal input part of coupler.The multiple cameras of front end is connected by video output captured image information with time division multiplexer, time division multiplexer is combined into single high-rate data stream with a plurality of rate data streams, enters encoder again and data is converted to the signal that can transmit; Modulator is modulated into stable high-frequency radio frequency oscillator signal with the signal source (vision signal that provides and audio signal) of transmission; The last signal of telecommunication is converted to light signal and is coupled into optical fiber under the effect of coupler.During the multiple signals simultaneous interpretation, the crosstalk when adaptive multiplexer can not produce analogue transmission, good stability, environmental suitability height.
Further, described coupler comprises LD light emitting source and light-receiving device, and also is connected with automatic energy output control circuit between LD light emitting source and light-receiving device.When carrying out opto-electronic conversion, the energy output control circuit can be monitored the automatic control that the amplifier gain in the light-receiving device is automatically adjusted with signal intensity in real time to the APC circuit (automatic power control circuitry) in the coupler automatically.
Further, described time division multiplexer is provided with third level lightning protection device.During normal the operation, the access of third level lightning protection device does not influence the normal transmission of front end signal, and earth impedance should be big, and the impedance that is connected in the circuit is little; When thunder and lightning attacked communication bus, third level lightning protection device can be brought into play good voltage clamping action; Suppressing to be no more than in the thunder and lightning attack process of the maximum through-current capacity of lightning protection device, third level lightning protection device attacks thunder and lightning has enough fast response speed, guarantees that electronic equipment is in the safe handling in many thunderstorms area, western part.
Further, also comprise LCD, described LCD links to each other with the LD light emitting source.LCD can show the various parameters of light source, for operating personnel provide the data support.
Further, as preferably, described encoder is the 8B/10B encoder.The 8B/10B encoder can guarantee that the serial data that transmits can correctly be restored at receiving terminal, in addition, utilize some special codes, the work that can help receiving terminal to reduce, and can find the error of transmission of data bit in early days, suppress wrong the continuation and take place.
The present invention compared with prior art, have following advantage and a beneficial effect:
1 the present invention includes modular converter and radio-frequency module, the serial data output of modular converter links to each other with the modulation input of radio-frequency module, described modular converter comprises time division multiplexer and encoder, described radio-frequency module comprises modulator and coupler, time division multiplexer is connected with the front end video output, encoder links to each other with time division multiplexer, and the signal output part of described modulator links to each other with the signal input part of coupler.During the multiple signals simultaneous interpretation, the crosstalk when adaptive multiplexer can not produce analogue transmission, good stability, environmental suitability height.
2 time division multiplexers of the present invention are provided with third level lightning protection device.During normal the operation, the access of third level lightning protection device does not influence the normal transmission of front end signal, and earth impedance should be big, and the impedance that is connected in the circuit is little; When thunder and lightning attacked communication bus, third level lightning protection device can be brought into play good voltage clamping action; Suppressing to be no more than in the thunder and lightning attack process of the maximum through-current capacity of lightning protection device, third level lightning protection device attacks thunder and lightning has enough fast response speed, guarantees that electronic equipment is in the safe handling in many thunderstorms area, western part.
Description of drawings
Fig. 1 is structured flowchart of the present invention.
Embodiment
Embodiment 1
As shown in Figure 1, present embodiment comprises modular converter and radio-frequency module, the serial data output of modular converter links to each other with the modulation input of radio-frequency module, described modular converter comprises time division multiplexer and encoder, described radio-frequency module comprises modulator and coupler, encoder links to each other with time division multiplexer, and the signal output part of described modulator links to each other with the signal input part of coupler.
The multiple cameras of front end is connected by video output captured image information with time division multiplexer, time division multiplexer is combined into single high-rate data stream with a plurality of rate data streams, enters encoder again and data is converted to the signal that can transmit; Modulator is modulated into stable high-frequency radio frequency oscillator signal with the signal source (vision signal that provides and audio signal) of transmission; The last signal of telecommunication is converted to light signal and is coupled into optical fiber under the effect of coupler.
Embodiment 2
As shown in Figure 1, present embodiment is on the basis of embodiment 1, also comprise LCD, described LCD links to each other with the LD light emitting source, described pressure coupler comprises LD light emitting source and light-receiving device, and also be connected with automatic energy output control circuit between LD light emitting source and light-receiving device, time division multiplexer is provided with third level lightning protection device.LCD can show the various parameters of light source, for operating personnel provide the data support; When carrying out opto-electronic conversion, the energy output control circuit can be monitored the automatic control that the amplifier gain in the light-receiving device is automatically adjusted with signal intensity in real time to the APC circuit in the coupler automatically; During normal the operation, the access of third level lightning protection device does not influence the normal transmission of front end signal, and earth impedance should be big, and the impedance that is connected in the circuit is little; When thunder and lightning attacked communication bus, third level lightning protection device can be brought into play good voltage clamping action; Suppressing to be no more than in the thunder and lightning attack process of the maximum through-current capacity of lightning protection device, third level lightning protection device attacks thunder and lightning has enough fast response speed, guarantees that electronic equipment is in the safe handling in many thunderstorms area, western part.
As preferably, described encoder is the 8B/10B encoder.The 8B/10B encoder can guarantee that the serial data that transmits can correctly be restored at receiving terminal, in addition, utilize some special codes, the work that can help receiving terminal to reduce, and can find the error of transmission of data bit in early days, suppress wrong the continuation and take place.
Claims (5)
1. digital video optical sender, comprise modular converter and radio-frequency module, the serial data output of modular converter links to each other with the modulation input of radio-frequency module, it is characterized in that: described modular converter comprises time division multiplexer and encoder, described radio-frequency module comprises modulator and coupler, encoder links to each other with time division multiplexer, and the signal output part of described modulator links to each other with the signal input part of coupler, and time division multiplexer is connected with modulator.
2. a kind of digital video optical sender according to claim 1, it is characterized in that: described coupler comprises LD light emitting source and light-receiving device, and also is connected with automatic energy output control circuit between LD light emitting source and light-receiving device.
3. a kind of digital video optical sender according to claim 1 and 2, it is characterized in that: described time division multiplexer is provided with third level lightning protection device.
4. a kind of digital video optical sender according to claim 2, it is characterized in that: also comprise LCD, described LCD links to each other with the LD light emitting source.
5. a kind of digital video optical sender according to claim 1, it is characterized in that: described encoder is the 8B/10B encoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102663175A CN103347183A (en) | 2013-06-28 | 2013-06-28 | Digital video optical transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102663175A CN103347183A (en) | 2013-06-28 | 2013-06-28 | Digital video optical transmitter |
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| CN103347183A true CN103347183A (en) | 2013-10-09 |
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| CN2013102663175A Pending CN103347183A (en) | 2013-06-28 | 2013-06-28 | Digital video optical transmitter |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040131359A1 (en) * | 2002-08-09 | 2004-07-08 | Shigeyuki Yamashita | Data transmission method and data transmission apparatus |
| KR20070050692A (en) * | 2005-11-11 | 2007-05-16 | (주) 프라임디지탈 | Digital video recording system able to store video signal classified by channels and method thereof |
| CN201957028U (en) * | 2010-06-13 | 2011-08-31 | 成都必翰信息技术有限责任公司 | Optical transceiver with full port lightning protection structure |
| CN202050503U (en) * | 2011-03-11 | 2011-11-23 | 孙飞 | Multichannel uncompressed digital video optical fiber transmission device |
| CN202444559U (en) * | 2012-02-21 | 2012-09-19 | 常州响当当电子科技有限公司 | Video optical transceiver |
| CN102752908A (en) * | 2011-04-18 | 2012-10-24 | 松下电器产业株式会社 | Semiconductor light-emiting element driver circuit and light fixture using the same |
| CN202524512U (en) * | 2012-05-11 | 2012-11-07 | 山东鑫华泰电子科技有限公司 | Eight-path pure-video digital video optical transceiver |
| CN203301664U (en) * | 2013-10-12 | 2013-11-20 | 成都思迈科技发展有限责任公司 | Multi-channel video optical transmitter |
-
2013
- 2013-06-28 CN CN2013102663175A patent/CN103347183A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040131359A1 (en) * | 2002-08-09 | 2004-07-08 | Shigeyuki Yamashita | Data transmission method and data transmission apparatus |
| KR20070050692A (en) * | 2005-11-11 | 2007-05-16 | (주) 프라임디지탈 | Digital video recording system able to store video signal classified by channels and method thereof |
| CN201957028U (en) * | 2010-06-13 | 2011-08-31 | 成都必翰信息技术有限责任公司 | Optical transceiver with full port lightning protection structure |
| CN202050503U (en) * | 2011-03-11 | 2011-11-23 | 孙飞 | Multichannel uncompressed digital video optical fiber transmission device |
| CN102752908A (en) * | 2011-04-18 | 2012-10-24 | 松下电器产业株式会社 | Semiconductor light-emiting element driver circuit and light fixture using the same |
| CN202444559U (en) * | 2012-02-21 | 2012-09-19 | 常州响当当电子科技有限公司 | Video optical transceiver |
| CN202524512U (en) * | 2012-05-11 | 2012-11-07 | 山东鑫华泰电子科技有限公司 | Eight-path pure-video digital video optical transceiver |
| CN203301664U (en) * | 2013-10-12 | 2013-11-20 | 成都思迈科技发展有限责任公司 | Multi-channel video optical transmitter |
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Application publication date: 20131009 |