CN101267548A - Space laser video and audio transmission system - Google Patents
Space laser video and audio transmission system Download PDFInfo
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- CN101267548A CN101267548A CN 200810050370 CN200810050370A CN101267548A CN 101267548 A CN101267548 A CN 101267548A CN 200810050370 CN200810050370 CN 200810050370 CN 200810050370 A CN200810050370 A CN 200810050370A CN 101267548 A CN101267548 A CN 101267548A
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Abstract
The invention relates to a space laser audio video transmission system, belonging to the field of space laser communication. The system is composed of a camera (1), an A/D conversion card (2), a video coding unit (3), a digital signal processing unit (4), a laser emitting unit (5), an optical antenna (7), a digital signal processing unit (8), a video decoding unit (9), a D/A conversion card (10) and a monitor (11). The system can transmit not only image video information, but also voice signals; the communication rate can reach up to 311Mbps; the transmission distance is far, reaching to more than 20Km; full-duplex communication is employed, two communication parties can communicate visually; the small-sized and modularized design make each part of the device compact and small; the circuit combination structure design makes the circuit universal and convenient to maintain, and particularly suitable for field battle.
Description
Technical field
The invention belongs to the laser space communication field, relate to space laser video and audio transmission system.
Background technology
Battlefield image transmission is that the commanding officer understands the guarantee that the battlefield situation is implemented favourable commander in real time.Present image transmission mainly concentrates on wireless and microwave communication technology or Fibre Optical Communication Technology.Wireless and microwave communication technology is most widely used now, but under the environment of modern war strong electromagnetic, between the electromagnetism quiet period of prewar, all ineffective.Fibre Optical Communication Technology has speed height, advantage capacious, but it is the same with wire communication, must carry out prior shop frame, obviously is not suitable for the needs in front, battlefield.
The laser space communication technology is to utilize laser beam directly to carry out the technology of message transmission in atmosphere or outer space.Advantages such as laser space communication is compared with other communication, and it is low to have a cost, and construction period is short are more suitable for being applied to the structure of battlefield provisional communication net, laser data local area network (LAN) and metropolitan area network.Laser communication technology is because characteristics such as eavesdropping is concentrated, is difficult to good, the high directivity of its monochromaticjty, luminous power, cost is low, installation is fast, and causes the great attention of various countries.
Space laser video and audio communication is meant a kind of communication mode that utilizes laser beam to carry out the audio frequency and video transmission.This communication mode is an important research direction that develops in the future communications field.(list of references: He Xizheng, Xi Xiaoli. wireless laser communication outline [M]. Beijing: publishing house of Beijing University of Post ﹠ Telecommunication, 2004) along with in recent years, the application demand of battlefield high-speed audio and video transmission is more and more, and traditional audio frequency and video transmission equipment can't satisfy various environmental conditions.The laser audio/video transmitting device that also do not have living space up to now, therefore, development laser audio/video transmitting device is to accelerate the China's national defense modernization process, also is a kind of device that industry is badly in need of.
Summary of the invention
For laser space communication system, device miniaturization is the important techniques characteristics, and modularization then is the major technique basis of Standardization instrument, generalization and raising reliability, maintainability.The collection of Laser emission and laser pick-off, video data reliably also all is main key technology with coding.In order to realize the transmission of laser digital audio frequency and video, this device also needs to have following function: the modulation of (1) high-speed light: owing to adopt the video flowing of two-forty, laser power drives needs to consider to have sufficiently high switching speed and drive current, for the life-span of protection the laser distance and weather occasion different, also to consider the automatic control of laser power with adaptation; (2) small-signal receives: can to receive recovering signal reliably in order adapting under rugged environment, to have realized the small-signal Detection Techniques; (3) A/D and D/A conversion: vision signal will be reduced into analog signal in receiving terminal digital information equally and could obtain image through being that analog signal need be carried out digitized processing behind the camera acquisition; (4) Digital Signal Processing: in order to improve transmission rate, digital video signal need carry out the high speed encoding and decoding.
Space laser video and audio transmission system of the present invention, as shown in Figure 1, it is constructed as follows: video camera 1, A/D transition card 2, video encoding unit 3, digital signal processing unit 4, laser emission element 5, optical antenna 6, photoelectricity receiving element 7, digital signal processing unit 8, video decoding unit 9, D/A transition card 10, monitor 11; 1-6 connects to form the transmitter unit of space laser video and audio transmission system in turn, and 6-11 connects to form the receiving element of space laser video and audio transmission system in turn.During work, communicating pair all has this to install a cover.
Described video camera 1: adopt the video camera that contains microphone, be used for image information is converted to the vision signal of simulation, acoustic information is converted to the audio signal of simulation.
Described A/D transition card 2: analog video signal that will transmit and audio signal are carried out the A/D conversion after isolating amplification and anti-aliasing filter, analog signal conversion is become digital signal.
Described video encoding unit 3: adopt international video coding technique, finish video compression coding, the output serial code.
Described digital signal processing unit 4: in order to adapt to the transmission of two-forty, digital signal processing unit carries out high spped coding with the serial code of video encoding unit 3 outputs.The traffic rate that adopts is that 2Mbps is adjustable to 311Mbps.
Described laser emission element 5: adopt laser output power adjustable continuously, the laser with switching speed of 1GHz carries out the emission of signal.Preferential employing wavelength is 0.810nm, the semiconductor laser of 0.850nm and 1.550nm, and power output is adjustable continuously from 5mW～200mW.
Described optical antenna 6: adopt trans telescope, launch/receive incorporate optical system,, finish the emission and the reception of signal laser to realize the directional light emission.
Described photoelectricity receiving element 7: adopt APD as the probe unit circuit, realize that the light signal that optical antenna 6 is received converts the signal of telecommunication to, can adapt to reliable received signal under rugged environment.
Described digital signal processing unit 8: the corresponding decoding function that realizes digital signal processing unit 4.
Described video decoding unit 9: the corresponding decoding function of finishing video encoding unit 3.
Described D/A transition card 10: finish the reduction of analog video signal and audio signal.
Described monitor 11: be used for direct viewing and listen to video/audio information, general television set just can.
In emission side, the analog video signal of gathering by common video camera 1 and audio signal are after A/D transition card 2 is isolated amplifications and anti-aliasing filter, carry out the A/D conversion, be compressed into the digital video frequency flow of standard again by video compression coding unit 3, then through digital signal processing unit 4, make digital video frequency flow deliver to 5 li drive laser of laser emission element and send laser, launch by optical antenna 6 through high spped coding; The recipient, at first convert light signal to the signal of telecommunication by photoelectricity receiving element 7, through amplifying shaping, obtain the digital video frequency flow of standard by digital signal processing unit 8 decodings, the intervisibility decoding of decoding unit 9 frequently again, the D/A of D/A transition card 10 conversion is delivered to video and the voice signal that 11 li of monitors will the side of emission collect and is carried out real-time broadcast.
The dynamic duty process:
(1) setting up of optical antenna: respectively lay space laser video and audio transmission system one cover at receiving-transmitting sides, erect optical antenna 6, and make it point to the other side, see the system that takes aim at, adjust camera lens, make the other side be positioned at the center of the camera lens Target observator cross hairs of oneself by eyepiece.
(2) line: the video output cable of video camera 1 is connected on the video input terminal of A/D transition card 2, the audio output line of video camera 1 is connected on audio input end of A/D transition card 2, the output line of A/D transition card 2 is connected on the input terminal of video encoding unit 3, the output line of video encoding unit 3 is connected on the input terminal of digital signal processing unit 4, the output line of digital signal processing unit 4 is connected on the input terminal of laser emission element 5, and so far the line of emission system unit finishes; In like manner receiving system unit line is finished.
(3) system work process: energized, and unlatching master switch, system's each several part powers on and enters normal operating conditions, system work process is: gather analog video signal and audio signal by the video camera 1 that contains microphone, after delivering to A/D card 2, after isolating amplification and anti-aliasing filter, carry out the A/D conversion, by video encoding unit 3 signal compression coding is become the digital video frequency flow of standard again, then signal enters digital signal processing unit 4 and carries out Digital Signal Processing, make digital video frequency flow deliver to laser emission element 5 through behind the high spped coding, drive laser is sent laser, launches by optical antenna 6; The recipient, at first convert light signal to the signal of telecommunication by photoelectricity receiving element 7, through amplifying shaping, carry out the digital video frequency flow that high-speed decoding obtains standard by digital signal processing unit 8, finish decoding by video decoding unit 9 again, convert the video and the audio signal of simulation to by D/A transition card 10, deliver to monitor 11, video and voice signal that emission side is collected carry out real-time broadcast.
Space laser video and audio transmission system of the present invention possesses following beneficial effect: (1) can not only the images video information, and also can transmit voice signal, and can work alone; (2) realized video transmission technologies at a high speed, traffic rate can reach 311Mbps; (3) long transmission distance can reach more than the 20Km; (4) realized full-duplex communication, communicating pair directly carries out video call by this device; (5) EMC Design: need the functional unit of shielding, it is individually shielded to adopt aluminium sheet to mill the shielding box of system.(6) versatility, interchangeability: adopt miniaturization, modularized design, make device various piece volume small and exquisite, compact conformation; Circuit combined structure design makes general, the exchange of circuit, maintains easily, and is particularly suitable for being applied to field operations.
Description of drawings
Fig. 1 is the space laser video and audio transmission system composition diagram.
Embodiment
Embodiment 1
Space laser video and audio transmission system of the present invention, as shown in Figure 1, it is constructed as follows: video camera 1, A/D transition card 2, video encoding unit 3, digital signal processing unit 4, laser emission element 5, optical antenna 6, photoelectricity receiving element 7, digital signal processing unit 8, video decoding unit 9, D/A transition card 10, monitor 11; 1-6 connects to form the emission system of space laser video and audio transmission system in turn, and 6-11 connects to form the receiving system of space laser video and audio transmission system in turn.During work, communicating pair all has this to install a cover.
Described video camera 1: adopt the video camera that contains microphone, be used for image information is converted to the vision signal of simulation, acoustic information is converted to the audio signal of simulation.
Described A/D transition card 2: analog video signal that will transmit and audio signal are carried out the A/D conversion after isolating amplification and anti-aliasing filter, analog signal conversion is become digital signal.
Described video encoding unit 3: adopt international video coding technique, finish video compression coding, the serial code of output.
Described digital signal processing unit 4: in order to adapt to the transmission of two-forty, digital signal processing unit carries out high spped coding with the serial code of video encoding unit 3 outputs.The traffic rate that adopts is that 2Mbps is adjustable to 311Mbps.
Described laser emission element 5: adopt laser output power adjustable continuously, the laser with switching speed of 1GHz carries out the emission of signal.Adopting wavelength is the semiconductor laser of 0.810nm, and power output is adjustable continuously from 5mW～200mW.
Described optical antenna 6: adopt trans telescope, launch/receive incorporate optical system.To realize the directional light emission, finish the emission and the reception of signal laser.
Described photoelectricity receiving element 7: adopt APD as the probe unit circuit, realize that the light signal that optical antenna 6 is received converts the signal of telecommunication to, can adapt to reliable received signal under rugged environment.
Described digital signal processing unit 8: the corresponding decoding function that realizes digital signal processing unit 4.
Described video decoding unit 9: the corresponding decoding function of finishing video encoding unit 3.
Described D/A transition card 10: finish the reduction of analog video signal and audio signal.
Described monitor 11: be used for direct viewing and listen to video/audio information, general television set just can.
In emission side, the analog video signal of gathering by common video camera 1 and audio signal are after A/D transition card 2 is isolated amplifications and anti-aliasing filter, carry out the A/D conversion, be compressed into the digital video frequency flow of standard again by video compression coding unit 3, then through digital signal processing unit 4, make digital video frequency flow deliver to 5 li drive laser of laser emission element and send laser, launch by optical antenna 6 through high spped coding; The recipient, at first convert light signal to the signal of telecommunication by photoelectricity receiving element 7, through amplifying shaping, obtain the digital video frequency flow of standard by digital signal processing unit 8 decodings, the intervisibility decoding of decoding unit 9 frequently again, the D/A of D/A transition card 10 conversion is delivered to video and the voice signal that 11 li of monitors will the side of emission collect and is carried out real-time broadcast.
The dynamic duty process:
(1) setting up of optical antenna: respectively lay space laser video and audio transmission system one cover at receiving-transmitting sides, erect optical antenna 6, and make it point to the other side, see the system that takes aim at, adjust camera lens, make the other side be positioned at the center of the camera lens Target observator cross hairs of oneself by eyepiece.
(2) line: video camera 1 has adopted model TYN8090, and microphone is built-in; It is the television set of HS-3706 that monitor 11 has adopted the Haier model, is operated in the AV state.The video output cable of video camera 1 is connected on the video input terminal of A/D transition card 2, the audio output line of video camera 1 is connected on audio input end of A/D transition card 2, the output line of A/D transition card 2 is connected on the input terminal of video encoding unit 3, the output line of video encoding unit 3 is connected on the input terminal of digital signal processing unit 4, the output line of digital signal processing unit 4 is connected on the input terminal of laser emission element 5, and so far the line of emission system unit finishes; In like manner receiving system unit line is finished.
(3) system work process: energized, and unlatching master switch, system's each several part powers on and enters normal operating conditions, system work process is: gather analog video signal and audio signal by the video camera 1 that contains microphone, after delivering to A/D card 2, after isolating amplification and anti-aliasing filter, carry out the A/D conversion, by video encoding unit 3 signal compression coding is become the digital video frequency flow of standard again, then signal enters digital signal processing unit 4 and carries out Digital Signal Processing, make digital video frequency flow deliver to laser emission element 5 through behind the high spped coding, drive laser is sent laser, launches by optical antenna 6; The recipient, at first convert light signal to the signal of telecommunication by photoelectricity receiving element 7, through amplifying shaping, carry out the digital video frequency flow that high-speed decoding obtains standard by digital signal processing unit 8, finish decoding by video decoding unit 9 again, convert the video and the audio signal of simulation to by D/A transition card 10, deliver to monitor 11, video and voice signal that emission side is collected carry out real-time broadcast.
Embodiment 2
As embodiment 1 described space laser video and audio transmission system, described laser emission element 5: adopt laser output power adjustable continuously, the laser with switching speed of 1GHz carries out the emission of signal.Adopting wavelength is the semiconductor laser of 0.850nm, and power output is adjustable continuously from 5mW～200mW.
Embodiment 3
As embodiment 1 described space laser video and audio transmission system, described laser emission element 5: adopt laser output power adjustable continuously, the laser with switching speed of 1GHz carries out the emission of signal.Adopting wavelength is the semiconductor laser of 1.550nm, and power output is adjustable continuously from 5mW～200mW.
Claims (4)
1, space laser video and audio transmission system is characterized in that, it constitutes: video camera (1), A/D transition card (2), video encoding unit (3), digital signal processing unit (4), laser emission element (5), optical antenna (6), photoelectricity receiving element (7), digital signal processing unit (8), video decoding unit (9), D/A transition card (10), monitor (11); (1)-(6) connect to form the transmitter unit of space laser video and audio transmission system in turn, (6)-(11) connect to form the receiving element of space laser video and audio transmission system in turn.During work, communicating pair all has this to install a cover;
Described video camera (1): adopt the video camera that contains microphone, be used for image information is converted to the vision signal of simulation, acoustic information is converted to the audio signal of simulation;
Described A/D transition card (2): will need the analog video signal that transmits and audio signal through isolate amplify and anti-aliasing filter after, carry out A/D and change, analog signal conversion is become digital signal;
Described video encoding unit (3): adopt international video coding technique, finish video compression coding, the output serial code;
Described digital signal processing unit (4): in order to adapt to the transmission of two-forty, digital signal processing unit carries out high spped coding with the serial code of video encoding unit (3) output.The traffic rate that adopts is that 2Mbps is adjustable to 311Mbps;
Described laser emission element (5): adopt laser output power adjustable continuously, the laser with switching speed of 1GHz carries out the emission of signal, and the semiconductor laser power output of employing is adjustable continuously from 5mW～200mW;
Described optical antenna (6): adopt trans telescope, launch/receive incorporate optical system,, finish the emission and the reception of signal laser to realize the directional light emission;
Described photoelectricity receiving element (7): adopt APD as the probe unit circuit, realize that the light signal that optical antenna (6) is received converts the signal of telecommunication to, can adapt to reliable received signal under rugged environment;
Described digital signal processing unit (8): the corresponding decoding function that realizes digital signal processing unit (4);
Described video decoding unit (9): the corresponding video decoding function of finishing video encoding unit (3);
Described D/A transition card (10): finish the reduction of analog video signal and audio signal;
Described monitor (11): be used for direct viewing and listen to video/audio information, general television set just can;
In emission side, the analog video signal of gathering by common video camera (1) and audio signal are after A/D transition card (2) is isolated amplification and anti-aliasing filter, carry out the A/D conversion, be compressed into the digital video frequency flow of standard again by video compression coding unit (3), then through digital signal processing unit (4), make digital video frequency flow deliver to laser emission element (5) lining drive laser and send laser, launch by optical antenna (6) through high spped coding; The recipient, at first convert light signal to the signal of telecommunication by photoelectricity receiving element (7), through amplifying shaping, obtain the digital video frequency flow of standard by digital signal processing unit (8) decoding, the intervisibility decoding of decoding unit (9) frequently again, the D/A of D/A transition card (10) conversion is delivered to video and the voice signal that monitor (11) lining will the side of emission collects and is carried out real-time broadcast.
2, space laser video and audio transmission system as claimed in claim 1, it is characterized in that, described laser emission element (5): adopt laser output power adjustable continuously, laser with switching speed of 1GHz carries out the emission of signal, and the employing wavelength is that the semiconductor laser power output of 0.810nm is adjustable continuously from 5mW～200mW.
3, space laser video and audio transmission system as claimed in claim 1, it is characterized in that, described laser emission element (5): adopt laser output power adjustable continuously, laser with switching speed of 1GHz carries out the emission of signal, and the employing wavelength is that the semiconductor laser power output of 0.850nm is adjustable continuously from 5mW～200mW.
4, space laser video and audio transmission system as claimed in claim 1, it is characterized in that, described laser emission element (5): adopt laser output power adjustable continuously, laser with switching speed of 1GHz carries out the emission of signal, and the employing wavelength is that the semiconductor laser power output of 1.550nm is adjustable continuously from 5mW～200mW.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810050370 CN101267548A (en) | 2008-02-04 | 2008-02-04 | Space laser video and audio transmission system |
| CN 200810181417 CN101404762A (en) | 2008-02-04 | 2008-11-07 | Spacing laser audio/video transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810050370 CN101267548A (en) | 2008-02-04 | 2008-02-04 | Space laser video and audio transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN101267548A true CN101267548A (en) | 2008-09-17 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810050370 Withdrawn CN101267548A (en) | 2008-02-04 | 2008-02-04 | Space laser video and audio transmission system |
| CN 200810181417 Pending CN101404762A (en) | 2008-02-04 | 2008-11-07 | Spacing laser audio/video transmission system |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810181417 Pending CN101404762A (en) | 2008-02-04 | 2008-11-07 | Spacing laser audio/video transmission system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540193A (en) * | 2010-12-24 | 2012-07-04 | 无锡物联网产业研究院 | Laser radar monitoring system |
| CN104767569B (en) * | 2015-03-31 | 2017-05-17 | 中国电子科技集团公司第三十四研究所 | Blue-green laser transmission system in optical communication |
| CN108768529A (en) * | 2018-04-27 | 2018-11-06 | 长春理工大学 | Telesurgery room video information wireless laser transmitting device |
| CN108847894A (en) * | 2018-08-03 | 2018-11-20 | 郑州飞铄电子科技有限公司 | A kind of laser communication device |
| CN112859320A (en) * | 2021-01-12 | 2021-05-28 | 连云港市拓普科技发展有限公司 | Binocular telescope system with built-in wireless optical communication |
| CN115333623A (en) * | 2022-07-25 | 2022-11-11 | 中关村芯海择优科技有限公司 | Unidirectional laser communication method, storage medium, acquisition end, monitoring end and equipment |
-
2008
- 2008-02-04 CN CN 200810050370 patent/CN101267548A/en not_active Withdrawn
- 2008-11-07 CN CN 200810181417 patent/CN101404762A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540193A (en) * | 2010-12-24 | 2012-07-04 | 无锡物联网产业研究院 | Laser radar monitoring system |
| CN102540193B (en) * | 2010-12-24 | 2014-04-30 | 无锡物联网产业研究院 | Laser radar monitoring system |
| CN104767569B (en) * | 2015-03-31 | 2017-05-17 | 中国电子科技集团公司第三十四研究所 | Blue-green laser transmission system in optical communication |
| CN108768529A (en) * | 2018-04-27 | 2018-11-06 | 长春理工大学 | Telesurgery room video information wireless laser transmitting device |
| CN108847894A (en) * | 2018-08-03 | 2018-11-20 | 郑州飞铄电子科技有限公司 | A kind of laser communication device |
| CN112859320A (en) * | 2021-01-12 | 2021-05-28 | 连云港市拓普科技发展有限公司 | Binocular telescope system with built-in wireless optical communication |
| CN115333623A (en) * | 2022-07-25 | 2022-11-11 | 中关村芯海择优科技有限公司 | Unidirectional laser communication method, storage medium, acquisition end, monitoring end and equipment |
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| CN101404762A (en) | 2009-04-08 |
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