CN201352837Y - Emergency wireless video transmission system - Google Patents
Emergency wireless video transmission system Download PDFInfo
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- CN201352837Y CN201352837Y CNU2009201299053U CN200920129905U CN201352837Y CN 201352837 Y CN201352837 Y CN 201352837Y CN U2009201299053 U CNU2009201299053 U CN U2009201299053U CN 200920129905 U CN200920129905 U CN 200920129905U CN 201352837 Y CN201352837 Y CN 201352837Y
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Abstract
The utility model relates to the technical field of wireless video transmission, and discloses an emergency wireless video transmission system which comprises a command center (210), at least one high-point receiving unit (220), a vehicle-bone relay unit (230), at least one wireless video front terminal (240) and a large-power broadcasting unit (250); the command center (210) is connected with the high-point receiving unit (220) and the large-power broadcasting unit (250) by optical transmission; and the vehicle-bone relay unit (230) is connected with a plurality of wireless video front terminals (240) and the high-point receiving unit (220) by a wireless network, and the plurality of wireless video front terminals (240) are connected with the large-power broadcasting unit (250) by the wireless network. The emergency wireless video transmission system can provide enough bandwidth to realize the bidirectional movement wireless transmission of a video image under emergency situation, and can also implement flexible dispatching and control to the site.
Description
Technical field
The utility model relates to the wireless video transmission technique field, more particularly, relates to a kind of emergent radio Video transmission system.
Background technology
Along with computer software hardware and development of wireless communication devices, the wireless video transmission technology has also obtained fast development, the application of wireless video transmission also more and more widely, this bandwidth and real-time to transmission of video images is had higher requirement.Along with the fast development of wireless communication technology, many new technology have appearred, and as OFDM technology, MIMO technology, UWB technology and ZigBee technology or the like, new vitality has been injected in emerging in large numbers to development of wireless communication devices of they.In the middle of numerous wireless technologys, OFDM becomes a maximum bright spot with its unique glamour.
OFDM (Orthogonal frequency-division multiplexing, orthogonal frequency division multiplexi) is the high speed transmission technology under a kind of wireless environment.As everyone knows, the frequency response curve of wireless channel is non-flat forms mostly, and the main thought of OFDM technology is divided into many orthogonal sub-channels with given channel exactly in frequency domain, uses a subcarrier to modulate on each subchannel, and each subcarrier parallel transmission.Like this, although total channel be non-flat forms, have frequency selectivity, but each subchannel is a relatively flat, what carry out on each subchannel is narrow band transmission, and signal bandwidth is less than the respective bandwidth of channel, so the just interference between the erasure signal waveform greatly.Because the carrier wave of each subchannel is mutually orthogonal in ofdm system, so their frequency spectrum is overlapped, so not only reduced the phase mutual interference between subcarrier, improved simultaneously the availability of frequency spectrum again, because the OFDM technical advantage is outstanding, application is very extensive, be mainly used at present in the Voice ﹠ Video transmission system and commercial signal communication system of broadcast type, main application comprises: asymmetrical Digital Subscriber Loop (ADSL), the digital audio broadcasting of etsi standard (DAB), digital video broadcasting (DVB), high definition TV (HDTV), wireless lan (wlan) etc., and become the mainstream technology that present wireless mobile video transmits based on the wireless video monitoring technology of OFDM technology.
The existing technology that is used for the emergent radio video transmission mainly contains following several, a kind of wireless video transmission technology that is based on satellite, also promptly by the satellite R-T unit is loaded on the vehicle, live video is returned or the video of receiving center by mode fixing or that move; Another is based on the wireless video transmission technology of CDMA, and the characteristics of this technology are the purposes that the characteristics of utilizing CDMA technology itself can carry out multi-slot binding reach transmission of video; The third is a simulated microwave transmission of video technology; At last a kind of is the technology of WLAN (wireless local area network) transmission of video.Satellite-based wireless video transmission technology, its major defect is the cost of use height, all to apply for frequency of utilization before each the use, basically can't accomplish the use of accident, and satellite communication do not conform to and is suitable for the individual soldier and bears operation, more can't be widely used in the reception of personal portable terminal; Wireless video transmission technology based on CDMA is because this technology itself is to have utilized public CDMA service network, in vital emergent event, network is not enough to support the great video transmission of occupied bandwidth, and, because the born bandwidth ratio features of smaller of this technology, can cause picture not smooth when making daily use, perhaps video inadequately clearly problem often take place; It then is to realize moving transmission or non-line-of-sight propagation basically that simulated microwave and WLAN (wireless local area network) are carried out the wireless video transmission.
By comparing with the utility model of describing in detail in conjunction with the accompanying drawings in the back, those skilled in the art can further see the more limitations and the shortcoming of existing wireless video transmission technology and system.
The utility model content
The technical problems to be solved in the utility model is, can't under case of emergency, provide the video image at the transmitting, monitoring scene that enough bandwidth realizes maneuverability also can't provide a kind of emergent radio Video transmission system at wireless video transmission system of the prior art to the problem of field conduct flexible dispatching control.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of emergent radio Video transmission system, comprise command centre, at least one high some receiving element, vehicle-mounted TU Trunk Unit, at least one wireless video front end, high-power unit and the wireless video dispatch terminal of broadcasting;
Described command centre connects described high some receiving element and the high-power unit of broadcasting by optical transmission; Described vehicle-mounted TU Trunk Unit connects a plurality of described wireless video front ends and described high some receiving element by wireless network; A plurality of described wireless video front ends are connected the described high-power unit of broadcasting with the wireless video dispatch terminal by wireless network.
Concrete, described high some receiving element further comprises instruction control unit, optical transmission unit and the video reception unit that is used to control the switching on and shutting down of described high some receiving element; Described video reception unit is electrically connected with described optical transmission unit.
Concrete, described vehicle-mounted TU Trunk Unit further comprises a plurality of receiving elements, looks the audio frequency switching matrix, video storage unit, monitoring display screen, video transmission unit, instruction generation unit and instruction transmitter unit;
A plurality of receiving elements are electrically connected with looking audio frequency switching matrix and video storage unit, look the audio frequency switching matrix and are electrically connected with video storage unit, monitoring display screen and video transmission unit, and instruction generation unit and instruction transmitter unit are electrically connected.
Concrete, described wireless video front end further comprises video acquisition unit, video switch unit, instruction control unit, video input unit and video transmission unit;
The video switch unit is electrically connected with video acquisition unit and video input unit, and the video switch unit is electrically connected with video transmission unit and instruction control unit.
Concrete, the described high-power unit of broadcasting further comprises optical transmission unit, coding unit, Multiplexing Unit, OFDM modulating unit, high-power transmitter unit and is used for described high-power instruction control unit of broadcasting the unit switch machine;
Described optical transmission unit is electrically connected with coding unit, and coding unit is electrically connected with Multiplexing Unit, and Multiplexing Unit is electrically connected with the OFDM modulating unit, and the OFDM modulating unit is electrically connected with high-power transmitter unit.
Concrete, described wireless video front end is video acquisition and the emitter that the vehicle-mounted machine dynamic formula is installed.
Concrete, described wireless video front end is single backpack video acquisition and emitter.
Concrete, described wireless video front end is video acquisition and the emitter that temporarily is installed on lamppost or the tripod.
Concrete, described wireless video front end is handbag type video acquisition and emitter.
Concrete, described wireless network is based on the wireless private network of OFDM.
The beneficial effects of the utility model are: a kind of emergent radio Video transmission system that provides by the utility model, can realize interim use in emergency circumstances, realize under case of emergency that promptly video monitoring also can carry out the wireless video passback in moving among a small circle, also support large tracts of land figure to pass covering, the broadcast type that can realize the city level covers a whole set of system that receives, and also supports two-way video and voice communication and scheduling controlling simultaneously.
Description of drawings
Fig. 1 is the schematic diagram according to a kind of emergent radio Video transmission system of the utility model one preferred embodiment;
Fig. 2 is the structure chart according to a kind of emergent radio Video transmission system of the utility model one preferred embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 1 shows the schematic diagram according to a kind of emergent radio Video transmission system of the utility model one preferred embodiment, described emergent radio Video transmission system 100 comprises command centre 106, two high some receiving elements 107, the high-power unit 108 of broadcasting, antenna system 110, vehicle-mounted TU Trunk Unit 105, wireless video dispatch terminal 111 and wireless video front end, the wireless video front end comprises four types, is respectively the wireless video front end 101 that the vehicle-mounted machine dynamic formula is installed, the wireless video front end 102 of single backpack, be installed in the wireless video front end 103 on lamppost body or the tripod and the wireless video front end 104 of handbag type temporarily; Wireless video front end 101,102,103 and 104 and quantity can on-the-spot actual conditions to take place according to emergency event dispose, all are deployed in on-the-spot wireless video front end all is to communicate by the wireless private network based on the OFDM technology to be connected with vehicle-mounted TU Trunk Unit 105, vehicle-mounted TU Trunk Unit 105 communicates by the wireless private network based on the OFDM technology with high some receiving element 107 and is connected, high some receiving element 107 can be disposed one according to actual needs, two or more, present embodiment has been disposed two high some receiving elements 107, described two high some receiving elements 107 connect command centre 106 by optical transport network 109 respectively, command centre 106 also is to be connected by optical transport network 109 with the high-power unit 108 of broadcasting, and the high-power unit 108 processes antenna system 110 of broadcasting communicates to connect the various wireless video front ends (101 that all are deployed in the scene by the wireless private network based on the OFDM technology, 102,103 and 104) and the wireless video dispatch terminal 111 that carries of Field Force.
A plurality of described wireless video front ends are given described vehicle-mounted TU Trunk Unit 105 with the video/audio signal at acquisition monitoring scene by the wireless network transmissions based on the OFDM technology, the described video/audio signal that vehicle-mounted TU Trunk Unit 105 will receive is by giving described high some receiving element 107 based on the wireless network transmissions of OFDM technology, the described video/audio signal that high some receiving element 107 is deployed in certain altitude in the city position will receive by optical transmission is transferred to described command centre 106; Described command centre 106 is transferred to the high-power unit 108 of broadcasting by optical transmission with the command scheduling video/audio signal, the high-power unit 108 of broadcasting is modulated into ofdm signal with the command scheduling video/audio signal and launches by antenna system 110, the wireless video dispatch terminal 111 that described Field Force carries receives high-power command scheduling video/audio signal of broadcasting unit 108 by the wireless network emission, and the field personnel just can carry out work according to the intention of command scheduling at emergent scene; Described vehicle-mounted TU Trunk Unit 105 generates control command and is transmitted to a plurality of wireless video front ends, high some receiving element 107 and the high-power unit 108 generation control actions of broadcasting by the control command of wireless network according to staff's input, for the wireless video front end, can control operations such as wherein video camera is realized zoom, focusing, amplifies, dwindled, rotation, pitching, also can carry out the parameter setting to video camera, improve the effect of monitoring live video IMAQ, perhaps the wireless video front end is carried out the switching on and shutting down operation; For height point receiving element 107 and the high-power unit 108 of broadcasting, control command mainly realizes its Remote switching on and shutting down operation.Command centre 106 also can be provided with command control system, broadcasts unit 108 emission control instruction by high-power.
Fig. 2 shows the structure chart of a kind of emergent radio Video transmission system of the utility model one preferred embodiment, and described emergent radio Video transmission system 200 comprises command centre 210, at least one high some receiving element 220, vehicle-mounted TU Trunk Unit 230, at least one wireless video front end 240, the high-power wireless video dispatch terminal 290 of broadcasting unit 250 and disposing on demand; Described command centre 210 connects described high some receiving element 220 by optical transmission 212, connects the high-power unit 250 of broadcasting by optical transmission 211; Described vehicle-mounted TU Trunk Unit 230 connects a plurality of described wireless video front ends 240 by the special wireless network 260 based on the OFDM technology, connects described high some receiving element 220 by the special wireless network 270 based on the OFDM technology; A plurality of described wireless video front ends 240 are connected the described high-power unit 250 of broadcasting by the special wireless network 280 based on the OFDM technology equally with wireless video dispatch terminal 290; High some receiving element 220 is deployed in the position that certain altitude is arranged in the city, can dispose one, two or more according to actual needs, wireless video front end 240 comprises four kinds of forms: video acquisition and emitter that (1) vehicle-mounted machine dynamic formula is installed, (2) single backpack video acquisition and emitter, (3) be installed in video acquisition and emitter on lamppost or the tripod, (4) handbag type video acquisition and emitter temporarily.Any form of wireless video front end 240 or various ways can be disposed a plurality of according to emergent on-the-spot actual conditions and needs; Wireless video dispatch terminal 290 can be carried by Field Force's quantity configuration and by the field personnel; The high-power unit 250 of broadcasting need be chosen the lofty perch in city and disposes, and mainly is to improve launching effect and coverage.
Command scheduling and Surveillance center that described command centre 210 is whole emergent radio Video transmission systems can set up separately as required, also can merge with existing urban safety administrative center, merge as 110 command centres with the city; Described high some receiving element 220 further comprises instruction control unit 221, optical transmission unit 222 and video reception unit 223; Described video reception unit 223 receives the video/audio signal of described vehicle-mounted TU Trunk Unit 230 emissions and by optical transmission unit 222 described video/audio signal is transferred to described command centre 210 and is used for emergent on-the-spot monitoring; Described instruction control unit 221 receives the control command of described vehicle-mounted TU Trunk Unit 230 emissions and produces the control corresponding action, promptly realizes the remote switch machine operation.
Described vehicle-mounted TU Trunk Unit 230 further comprises receiving element 231, looks audio frequency switching matrix 232, video storage unit 233, monitoring display screen 234, video transmission unit 235, instruction generation unit 236 and instruction transmitter unit 237; Disposed in the present embodiment four independently receiving element 231 form four independently receive paths, the Voice Surveillance signal is looked in the on-site supervision that can be deployed in emergent on-the-spot any four wireless video front-end collections according to different frequency acceptance divisions; Can certainly dispose as required and be less than or more than four receiving elements 231; Four receiving elements 231 with look audio frequency switching matrix 232 and video storage unit 233 is electrically connected, look audio frequency switching matrix 232 and be electrically connected with video storage unit 233, monitoring display screen 234 and video transmission unit 235, instruction generation unit 236 and instruction transmitter unit 237 are electrically connected;
Four receiving elements 231 receive four independently video/audio signal are stored in described video storage unit 233 or are chosen in through the switching of looking audio frequency switching matrix 232 and show on the monitoring display screen 234 or be transmitted to described high some receiving element 220 by video transmission unit 235; Instruction generation unit 236 has the keyboard of safety-security area special use, numerical key and some special function keys are arranged above, the user can be on this keyboard input of control commands, the user also can select the wireless video front end by input numbering on keyboard, instruction generation unit 236 is transmitted to a plurality of wireless video front ends 240 according to the control command of the order generation of user's input by described instruction transmitter unit 237, high some receiving element 220 and the high-power unit 250 of broadcasting produce control action, wireless video front end 240 receives the video camera that can control wherein after the control command and realizes zoom, focus on, amplify, dwindle, rotation, operations such as pitching, also can carry out the parameter setting to video camera, improve the effect of monitoring live video IMAQ, high some receiving element 220 and high-power broadcasting can be realized remote on-off after unit 250 receives control command, the user also can use the software client input control order on the notebook computers to connect into the gateway of command centre 210 in the mode of wireless or wired internet in vehicle-mounted TU Trunk Unit 230 or command centre 210, realizes the generation and the emission of control command.
Described wireless video front end 240 further comprises video acquisition unit 241, video switch unit 242, instruction control unit 243, video input unit 244 and video transmission unit 245;
Other video images of video image that video acquisition unit 241 is gathered and 244 inputs of video input unit select to send to video transmission unit 245 through the switching of video switch unit 242 again, the staff can select the video image of video acquisition unit 241 collections or the image of video input unit 244 to be transmitted to described vehicle-mounted TU Trunk Unit 230 by video transmission unit 245 by video switch unit 242 at the scene according to actual needs, instruction control unit 243 receives described vehicle-mounted TU Trunk Unit 230 or the high-power control command of broadcasting unit 250 transmissions is controlled the corresponding control action of described video acquisition unit 241 generations, the video camera that can control is wherein realized zoom, focus on, amplify, dwindle, rotation, operations such as pitching, also can carry out the parameter setting, improve the effect of monitoring live video IMAQ video camera.
The described high-power unit 250 of broadcasting further comprises optical transmission unit 251, coding unit 252, Multiplexing Unit 253, OFDM modulating unit 254, high-power transmitter unit 255 and instruction control unit 256;
Described optical transmission unit 251 is electrically connected with coding unit 252, and coding unit 252 is electrically connected with Multiplexing Unit 253, and Multiplexing Unit 253 is electrically connected with OFDM modulating unit 254, and OFDM modulating unit 254 is electrically connected with high-power transmitter unit 255;
The command scheduling video/audio signal process coding unit 252 that described optical transmission unit 251 receives from described command centre 210, be encoded into the code stream of MPEG2, the code stream of a plurality of MPEG2 carries out multiplexing through Multiplexing Unit 253, be modulated into ofdm signal by OFDM modulating unit 254 again, at last be transmitted to a plurality of described wireless video dispatch terminal 290 that the field personnel carries by special wireless network 280 based on the OFDM technology by high-power transmitter unit 255, the field personnel can carry out work on the spot according to the command scheduling video/audio signal that receives, described instruction control unit 256 produces the control corresponding action according to the control command from described vehicle-mounted TU Trunk Unit 230 emissions that receives, and promptly can realize the remote on-off of high-power transmitter unit 255.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1, a kind of emergent radio Video transmission system is characterized in that: comprise command centre (210), at least one high some receiving element (220), vehicle-mounted TU Trunk Unit (230), at least one wireless video front end (240), high-power unit (250) and the wireless video dispatch terminal (290) of broadcasting;
Described command centre (210) connects described high some receiving element (220) and the high-power unit (250) of broadcasting by optical transmission; Described vehicle-mounted TU Trunk Unit (230) connects a plurality of described wireless video front ends (240) and described high some receiving element (220) by wireless network; A plurality of described wireless video front ends (240) are connected the described high-power unit (250) of broadcasting with wireless video dispatch terminal (290) by wireless network.
2, emergent radio Video transmission system according to claim 1 is characterized in that: described high some receiving element (220) further comprises instruction control unit (221), optical transmission unit (222) and the video reception unit (223) that is used to control the switching on and shutting down of described high some receiving element (220); Described video reception unit (223) is electrically connected with described optical transmission unit (222).
3, emergent radio Video transmission system according to claim 1 is characterized in that: described vehicle-mounted TU Trunk Unit (230) further comprises a plurality of receiving elements (231), looks audio frequency switching matrix (232), video storage unit (233), monitoring display screen (234), video transmission unit (235), instruction generation unit (236) and instruct transmitter unit (237);
A plurality of receiving elements (231) with look audio frequency switching matrix (232) and video storage unit (233) is electrically connected, look audio frequency switching matrix (232) and be electrically connected with video storage unit (233), monitoring display screen (234) and video transmission unit (235), instruction generation unit (236) and instruction transmitter unit (237) are electrically connected.
4, emergent radio Video transmission system according to claim 1 is characterized in that: described wireless video front end (240) further comprises video acquisition unit (241), video switch unit (242), instruction control unit (243), video input unit (244) and video transmission unit (245);
Video switch unit (242) is electrically connected with video acquisition unit (241) and video input unit (244), and video switch unit (242) are electrically connected with video transmission unit (245) and instruction control unit (243).
5, emergent radio Video transmission system according to claim 1 is characterized in that: the described high-power unit (250) of broadcasting further comprises optical transmission unit (251), coding unit (252), Multiplexing Unit (253), OFDM modulating unit (254), high-power transmitter unit (255) and is used for described high-power instruction control unit (256) of broadcasting unit (250) switching on and shutting down;
Described optical transmission unit (251) is electrically connected with coding unit (252), coding unit (252) is electrically connected with Multiplexing Unit (253), Multiplexing Unit (253) is electrically connected with OFDM modulating unit (254), and OFDM modulating unit (254) is electrically connected with high-power transmitter unit (255).
6, emergent radio Video transmission system according to claim 1 is characterized in that: described wireless video front end (240) is video acquisition and the emitter that the vehicle-mounted machine dynamic formula is installed.
7, emergent radio Video transmission system according to claim 1 is characterized in that: described wireless video front end (240) is single backpack video acquisition and emitter.
8, emergent radio Video transmission system according to claim 1 is characterized in that: described wireless video front end (240) is video acquisition and the emitter that temporarily is installed on lamppost or the tripod.
9, emergent radio Video transmission system according to claim 1 is characterized in that: described wireless video front end (240) is handbag type video acquisition and emitter.
10, emergent radio Video transmission system according to claim 1, it is characterized in that: described wireless network is based on the wireless private network of OFDM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201299053U CN201352837Y (en) | 2009-02-17 | 2009-02-17 | Emergency wireless video transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201299053U CN201352837Y (en) | 2009-02-17 | 2009-02-17 | Emergency wireless video transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN201352837Y true CN201352837Y (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2009201299053U Expired - Fee Related CN201352837Y (en) | 2009-02-17 | 2009-02-17 | Emergency wireless video transmission system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263934A (en) * | 2011-05-23 | 2011-11-30 | 昆明理工大学 | Portable wireless digital image acquisition and transmission system |
| CN104506798A (en) * | 2014-12-11 | 2015-04-08 | 中国电子科技集团公司第二十二研究所 | Portable video capture device |
| CN109118778A (en) * | 2018-07-27 | 2019-01-01 | 中船电子科技有限公司 | A kind of vehicle-mounted control method of customs enforcement vehicle |
-
2009
- 2009-02-17 CN CNU2009201299053U patent/CN201352837Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263934A (en) * | 2011-05-23 | 2011-11-30 | 昆明理工大学 | Portable wireless digital image acquisition and transmission system |
| CN102263934B (en) * | 2011-05-23 | 2013-07-10 | 昆明理工大学 | Portable wireless digital image acquisition and transmission system |
| CN104506798A (en) * | 2014-12-11 | 2015-04-08 | 中国电子科技集团公司第二十二研究所 | Portable video capture device |
| CN109118778A (en) * | 2018-07-27 | 2019-01-01 | 中船电子科技有限公司 | A kind of vehicle-mounted control method of customs enforcement vehicle |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091125 Termination date: 20130217 |