CN201383878Y - Wireless audio and video transmission device - Google Patents
Wireless audio and video transmission device Download PDFInfo
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- CN201383878Y CN201383878Y CN200920135438U CN200920135438U CN201383878Y CN 201383878 Y CN201383878 Y CN 201383878Y CN 200920135438 U CN200920135438 U CN 200920135438U CN 200920135438 U CN200920135438 U CN 200920135438U CN 201383878 Y CN201383878 Y CN 201383878Y
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Abstract
The utility model discloses a wireless audio and video transmission device, which comprises a WLAN transmission module used for audio and video transmission and the switching control of transmission channels, and a multi-carrier transmission module used for audio and video transmission, wherein the WLAN transmission module is connected with the multi-carrier transmission module. The wireless audio and video transmission device organically combines the WLAN and the multi-carrier scheme, thereby realizing the full utilization under different resources and reliably realizing the real-time audio and video transmission under complicated environments.
Description
[technical field]
The utility model relates to a kind of wireless signal transmission techniques, particularly a kind of wireless audio and video transmission device.
[background technology]
At present, intensive along with urban development and building, the difficult problem of communication support when the safety problem in high building and underground garage and market becomes fire-fighting and emergency processing; At complex environment, such as multilayer underground garage or villages within the city, when abnormal conditions take place in the inside, building of shaking hands, how the outside learns the actual conditions of the inside, and this has also proposed the requirement of real-time video monitoring scheme to communication support.Particularly in the market place builet below the ground or during the garage breaking out of fire, how the fireman effectively links up and dispatches, and is the problem that wireless communication field is difficult to solve always.Under fire condition, original communication network (telephone, indoor covering wireless system) can not use fully.Talkback system can only reach the communication distance of B1, the mode that can only adopt artificial intercommunication to pass on a message when underground two layers or three layers is simply linked up, efficient is hanged down weak effect, concerning the rescue and relief work of " seizing every minute and second ", task finish fast or fireman's self safety particularly important.The particularly passback of live video and two-way intercommunication, the commanding officer of being convenient on the command car comprehensively plans as a whole command scheduling, finishes the work fast, ensures fireman's safety, is the problem that the communications industry is eager to solve always.
[summary of the invention]
Main purpose of the present utility model is: the wireless audio and video transmission device of realizing reliable transmission under a kind of complex environment is provided.
For this reason, the utility model proposes a kind of wireless audio and video transmission device, comprise the WLAN transport module that is used for audio frequency and video transmission and transmission channel switching controls, the multi-carrier transmission module that is used for the audio frequency and video transmission; Described WLAN transport module is connected with the multi-carrier transmission module.
Above-mentioned wireless audio and video transmission device, also comprise the video server module that is used for described multi-carrier transmission module output signal is converted to ICP/IP protocol, described video server module input is connected with described multi-carrier transmission module, and output is connected with described WLAN transport module.
Above-mentioned wireless audio and video transmission device also comprises the speech talkback module that is used for transmission of speech signals and transmission channel switch-over control signal, is connected with described WLAN transport module.Or also comprise and be connected the voice receiver module that is used for transmission of speech signals and transmission channel switch-over control signal with described WLAN transport module.
Above-mentioned wireless audio and video transmission device also comprises the long-range transmitting-receiving submodule of spread spectrum, is embedded at described WLAN transport module.
Wireless audio and video transmission device of the present utility model, dual mode multicarrier transmission mode and WLAN mode are adopted in audio frequency and video transmission, and can switch mutually between two kinds of patterns automatically, thereby reach reliably convenient, transmission destination efficiently.Multi-carrier mode can be delivered to vision signal the place more farther than general communication mode, and the penetration capacity of signal is stronger, can carry out the transmission of effective signal in complex environment, also can reach negative one or negative two layers such as underground garage.
Further, cooperate the WLAN transmission to adopt multistage trunking scheme, realize the bi-directional of multilevel signal, compatible multi-carrier mode intelligence is switched, can realize more the high-efficiency reliable transmission, such as realizing that F3/B3, four layers or more multi-layered garage or building comprise effective transmission of audio signal, vision signal and data-signal.
Because the utility model adopts wireless transmission method to realize the transmission of complex environment, need not pipeline installation, flexible.Can match automatically with other device contexts in the system and be connected availablely, need not be complicated set in advance is used in emergent application scenario especially; By default, can come into operation fast, need not to reset, for rescue and relief work, cope with contingencies the time of getting;
If the utility model is applied in the fire-fighting emergent rescue; the outer fireman in fire district can obtain realtime graphic by the utility model; bi-directional language function in the simultaneity factor can replace fireman's intercom; realize the non-blind area communication; can the realization science dispatch and support; in time dispose fire extinguishing scheme, rescue order, also can when fire fighter self causes danger, in time organize rescue, protection fireman inherently safe according to actual conditions.
The wireless audio and video transmission device of the utility model, have wide range of applications, can be applicable to that public security, fire-fighting, traffic police, people's air defense are emergent, municipal administration's law enforcement, monitoring of environment, fire-fighting emergent, water conservancy flood control, electric power are speedily carried out rescue work, railway emergency rescue, maritime affair law enforcement, maritime patrol inspection, customs's frontier defense, harbour monitoring, forest fire protection, oil field are antitheft, military surveillance, television relay etc., are fit to moving transmission in real time and monitoring of high quality graphic in the various complicated such as city, sea, mountain region.
[description of drawings]
Fig. 1 is the system configuration schematic diagram of the utility model embodiment one.
Fig. 2 is the structural representation that the utility model embodiment one wireless audio and video transmission device is applied to central station.
Fig. 3 is the mobile terminal structure schematic diagram of the utility model embodiment one.
Fig. 4 is wireless audio and video intelligence relay station (wireless audio and video transmission device) structural representation of the utility model embodiment one.
Fig. 5 is wireless audio and video intelligence relay station (wireless audio and video transmission device) structural representation of the utility model embodiment three.
[embodiment]
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
Embodiment one
Please refer to shown in Figure 1ly, in this example, the audio-video wireless transmission system comprises wireless audio and video central station, wireless audio and video intelligence relay station and wireless audio and video portable terminal.
The wireless audio and video central station comprises semifixed detachable parabolic antenna, forward antenna amplifier, feeder line, wireless audio and video transmission device, supervisory control comuter and two-way call talk back equipment.Please refer to shown in Figure 2ly, wireless audio and video transmission device: comprise the WLAN transport module, its actual working frequency range can be the improvement version based on WLAN of 1.2GHz, 2.4GHz, 5.86Hz or 700～900MHz; The multi-carrier transmission module, its actual working frequency range can be 300～800MHz, similar present individual soldier's video communication terminal module for ease of describing, hereinafter is typical case's representative with 340MHz; The speech talkback module can adopt traditional 350MHz～520MHz speech talkback machine functional module, for ease of describing, hereinafter is typical case's representative with 340MHz; The video server module is used to gather and change the vision signal of multi-carrier transmission module.
Wherein the WLAN transport module of 2.4GHz links to each other with supervisory control comuter by the RJ45 network interface, finishes the transmission of image and voice.And all unified network interface that is connected to based on TCP/IP of the speech talkback module of the multi-carrier transmission module of 340MHz and 370MHz is controlled by supervisory control comuter.The control command of the speech talkback module of 370MHz is operated by serial ports; The transfer of data that changes into ICP/IP protocol by the video server module from the AV signal of the multi-carrier transmission module of 340MHz also realizes control to the 370MHz down order by serial ports from the control signal of supervisory control comuter in the 2.4GHz module.Microphone and earphone also can directly be drawn from supervisory control comuter.
The wireless audio and video portable terminal: please refer to shown in Figure 3, comprise wear-type infrared lamp auto iris focus automatically camera, Adam's apple generator, integrated earphone microphone, automated power controls transmitter and the built-in small size antenna of high-gain.Automated power controls transmitter and comprises: baseband processing module, finish encoding compression, sound sign indicating numberization compression and the decompress(ion) of adjusting such as camera auto iris speed and night vision and vision signal, the transmitted in both directions of realization digital speech; WLAN transport module, its actual working frequency range can be the improvement versions based on WLAN of 1.2GHz, 2.4GHz, 5.8GHz or 700～900MHz; The multi-carrier transmission module, its actual working frequency range can be 300～800MHz, similar present individual soldier's video communication terminal module; The speech talkback module adopts traditional 350MHz～520MHz speech talkback machine functional module.
The wireless audio and video mobile terminal structure is light and handy, easy to use, can be installed on the motor vehicle or hangs between rescue team member's waist, and staff is freed fully; Adopt wireless form to send to wireless audio and video intelligence relay station the audio/video signal of gathering, can penetrate one deck floor and twice wall at interior of building; Built-in rechargeable nickel-hydrogen battery can reach 6 hours continuously service time; Even the camera with infrared function also can collect information clearly under the unglazed condition of dark, satisfy the on-the-spot needs of rescue fully.Built-in high-gain omni-directional antenna can reach optimum efficiency in maximum magnitude.The camera lens of camera possesses auto iris, focusing automatically, automatic white level processing capacity, antidetonation, high temperature resistance.
Wireless audio and video intelligence relay station: its structure is roughly the same with wireless audio and video transmission device as shown in Figure 2.Video image is received storage, transmits, and have the two-way voice transmissions function, can replace traditional intercom function, not stopped by barrier, almost reach the use boundary of no blind spot.And can accomplish multi-stage cascade, and transmit dynamic image signal and outside the scene, can reach 1500m-4000m to ground, under different settings, also can be used as the receiving terminal of wireless audio and video central station, have flexible and changeable function.Adopt internal or external antenna, powered battery can be used 6 hours at most continuously.
This example is utilized the WLAN transport module, realizes the harmless relaying that multistage WLAN is ordered; Compatible multicarrier audio frequency and video transmission on the basis of realizing multistage WLAN, the speech talkback module is replenished the reverse voice under this mode, makes this system realize the function of two-way voice transmissions; Realize switching as required, adapt to the specific requirement of different application environment, do not select optimal mode to finish the work automatically when in short supply or environment does not allow in frequency resource.
Under the not serious situation of line of sight conditions or microwave attenuation, system adopts the direct and two-way communication of WLAN transport module of 2.4GHz, turns round in multilayer and adds relay station when stopping situation and finish continuing of signal.The wireless audio and video central station drops to a certain degree to the 2.4GHz signal quality in monitoring and detection, available bandwidth (is equivalent to 10fps during less than 300kbps, but the user sets), by the 340MHz passage multi-carrier transmission module of speech talkback module remote control startup wireless audio and video portable terminal, carry out main business and switch.But the realization of this process is also operating personnel's pro-active intervention, show from the backstage that in 340MHz image stabilization transmission back switching to the foreground shows, In the view of operating personnel are fast again suddenly when the 2.4GHz image is slack-off (switching to the 340MHz pattern this moment), image is continuously, the existence of imperceptible switching.Be that two systems work simultaneously in a period of time in fact, just the user can be seen on the image effect good foreground that switches to.
When image switching when 340MHz is the main channel, finish the uplink of video and sound by the multi-carrier transmission passage, the passage of the speech talkback module of 370MHz is as the voice channel that receives order command, this passage can also be as multi-user's voice scheduling, its function just is equivalent to intercom, implementation can adopt ready-made intercom module, also can design with the multi-carrier transmission module of 340MHz passage is unified.
This moment, the 2.4GHz passage was waited for monitoring always, after (as 20fps) and the certain time when this signal quality rises to a certain degree (as 5 seconds), system automaticallyes switch and works as prepass to the 2.4GHz passage, the multi-carrier transmission passage of while remote closing wireless audio and video portable terminal, promptly return to the 2.4GHz pattern, reduce conflict with other system.
Further describe the operation principle that system is switched below again.2.4GHz work under normal circumstances, the wireless audio and video central station detects the signal quality of coming from mobile radio station in real time, the refresh rate of monitor video image is opened 340MHz multi-carrier transmission module system when signal drops to a certain degree simultaneously, and the central station picture also switches to the 340MHz passage synchronously; 2.4GHz passage still in trial work, returns to the 2.4GHz Entry Interface after the 2.4GHz signal quality rises to available effects and continues for some time, cut off the 340MHz passage.
At the wireless audio and video portable terminal, when attempting with 2.4GHz UNICOM that unsuccessful or signal quality is too poor, can initiatively open 340MHz passage and central station; Or control the switching of its state by the 2.4GHz passage of central station, and 370MHz waits for always, the actual receiving function that only needs the 370MHz passage, and it is in stand-by state always thus.
The 2.4GHz passage of central station is opened always, the signal of search portable terminal; During the 340MHz passage also is open at always and waits for; The 370MHz passage sends signal (voice and control command) as required.When the 2.4GHz signal descends, when transmission speed drops to a certain degree,, switch if implement order by the 370MHz passage behind the unsuccessful certain hour by the switching of issuing orders of this 2.4GHz passage.The variation of parameter is supervisory control comuter identification and operation automatically, and all operations automatically keep simultaneously and can manually get involved.The 370MHz passage is only when the central station duty personnel talks and have 370MHz order (mainly being replenishing 2.4GHz) to transmit when issuing.
Simultaneously, in the 2.4GHz passage, can support a plurality of far-end switching values, analog quantity (converting digital quantity to), this facilitates and expands other purposes, as humiture collection, water valve control, can realize these functions just increase cost hardly, realize the collection and the control of passage, by the central station unified monitoring.
From the angle of software control the process of switching is described again below. when determining the 2.4GHz number of image frames when reaching set point, keep the work of 2.4GHz passage, when its signal quality descends, when image refresh rate drops to set point, the transmission channel of 340MHz is opened in remote control, scans this picture signal in center-side simultaneously, after receiving that the 340MHz channel image is stable, automatically switch and close the demonstration of 2.4GHz channel image, main interface display 340MHz channel image.
This moment, 2.4GHz still continued to monitor its signal quality, switched back the 2.4GHz passage when number of image frames reaches set point and continues for some time (as 5 seconds, can set) back, and the while is by the emission of central station remote closing 340MHz.These switchings are carried out on the backstage, and the people can not feel the pause of video.
The 370MHz passage mainly is to solve descending sound to pass on and data command; Can adopt unidirectional voice receiver module, the most basic and the most necessary order has only one: can open 340MHz by this passage when 2.4GHz loses contact suddenly, though switch when the 2.4GHz signal slowly descends generally the time.
Embodiment two
On the basis of embodiment one, embedded the long-range transmitting-receiving submodule of spread spectrum that software is realized in wireless audio and video central station, wireless audio and video intelligence relay station and the wireless audio and video portable terminal respectively, be used for when the building mouth transmits signals to vehicle far away, using (can not reach as command car near the target building).Realization from underground two layers to the command car of 1500 meters-4000 meters of ground and distance outlets outer (without hindrance every), can receive as the high-quality screen as described in system's characteristics, the intelligent relay station while is also as the receiving terminal of wireless audio and video central station, i.e. conduct.
Embodiment three
Please refer to shown in Figure 5, this example is that with the difference of embodiment one wireless audio and video transmission device as wireless audio and video intelligence relay station of this example does not comprise the multi-carrier transmission module, therefore, it only carries out relay transmission to WLAN transmission and speech talkback transmission.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.For example, 370MHz can also adopt the intermediate station scheme to carry out the expansion of system scope, continues use habit of the prior art, can with the ultrashort wave talkback system compatibility of routine.340MHz one-way transmission voice and image are to central station, and oppositely voice transfer takes 370MHz to realize, mainly are because 370MHz is ripe intercom scheme, and be cheap, stable performance.Certainly, adopt two cover 340MHz schemes can realize the purpose of this utility model fully.340MHz is meant the unidirectional audio frequency and video transmission channel of COFDM of 210MHz～860MHz in more than describing, and for ease of describing, abbreviates 340MHz as; Equally, the 370MHz passage is meant the speech talkback machine passage of 320MHz～470MHz, for ease of describing, abbreviates the 370MHz passage as; 2.4GHz passage, its actual working frequency range can be the improvement versions based on WLAN of 1.2GHz, 2.4GHz, 5.8GHz or 700～900MHz.
Claims (10)
1. a wireless audio and video transmission device is characterized in that: comprise the WLAN transport module that is used for audio frequency and video transmission and transmission channel switching controls, the multi-carrier transmission module that is used for the audio frequency and video transmission; Described WLAN transport module is connected with the multi-carrier transmission module.
2. wireless audio and video transmission device as claimed in claim 1, it is characterized in that: also comprise the video server module that is used for described multi-carrier transmission module output signal is converted to ICP/IP protocol, described video server module input is connected with described multi-carrier transmission module, and output is connected with described WLAN transport module.
3. wireless audio and video transmission device as claimed in claim 2 is characterized in that: also comprise the speech talkback module that is used for transmission of speech signals and transmission channel switch-over control signal, be connected with described WLAN transport module.
4. wireless audio and video transmission device as claimed in claim 2 is characterized in that: also comprise the voice receiver module that is used for transmission of speech signals and transmission channel switch-over control signal, be connected with described WLAN transport module.
5. as each described wireless audio and video transmission device among the claim 1-4, it is characterized in that: also comprise the long-range transmitting-receiving submodule of spread spectrum, be embedded at described WLAN transport module.
6. wireless audio and video transmission device as claimed in claim 1 or 2 is characterized in that; Also comprise the second multi-carrier transmission module that is used for the audio frequency and video transmission, be connected with described WLAN transport module.
7. wireless audio and video transmission device as claimed in claim 3 is characterized in that: described speech talkback module is connected with described WLAN transport module by serial ports.
8. as each described wireless audio and video transmission device among the claim 1-4,7, it is characterized in that; Described multi-carrier transmission module is that working frequency range is the unidirectional audio frequency and video transport module of COFDM of 210MHz～860MHz.
9. as each described wireless audio and video transmission device among the claim 1-4,7, it is characterized in that: described WLAN transport module is that working frequency range is the WLAN transport module of 1.2GHz, 2.4GHz, 5.8GHz or 700～900MHz.
10. as each described wireless audio and video transmission device among the claim 1-4,7, it is characterized in that: also comprise antenna, be connected with described WLAN transport module, multi-carrier transmission module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920135438U CN201383878Y (en) | 2009-03-09 | 2009-03-09 | Wireless audio and video transmission device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920135438U CN201383878Y (en) | 2009-03-09 | 2009-03-09 | Wireless audio and video transmission device |
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| CN201383878Y true CN201383878Y (en) | 2010-01-13 |
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| CN200920135438U Expired - Fee Related CN201383878Y (en) | 2009-03-09 | 2009-03-09 | Wireless audio and video transmission device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010102552A1 (en) * | 2009-03-09 | 2010-09-16 | 深圳市源富创新电子有限公司 | Audio video wireless transmission system and transmission method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010102552A1 (en) * | 2009-03-09 | 2010-09-16 | 深圳市源富创新电子有限公司 | Audio video wireless transmission system and transmission method |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100113 Termination date: 20120309 |