CN101969390B - Wireless audio and video transmission system - Google Patents
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- CN101969390B CN101969390B CN2010102715922A CN201010271592A CN101969390B CN 101969390 B CN101969390 B CN 101969390B CN 2010102715922 A CN2010102715922 A CN 2010102715922A CN 201010271592 A CN201010271592 A CN 201010271592A CN 101969390 B CN101969390 B CN 101969390B
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Abstract
The invention discloses a wireless audio and video transmission system which comprises a moving end, a conducting end and a wireless link, wherein the moving end comprises an audio and video server unit, an information acquisition unit which is connected with the audio and video server unit, a user terminal unit which is connected with the audio and video server unit, a first high-frequency wireless signal transmission unit, a first low-frequency wireless signal transmission unit and a first detection conversion unit; the conducting end comprises a network terminal, a second high-frequency wireless signal transmission unit and a second low-frequency wireless signal transmission unit which carries out low-frequency wireless signal transmission with the first low-frequency wireless signal transmission unit through the wireless link; and the first detection conversion unit is respectively connected with the network terminal, the second high-frequency wireless signal transmission unit and the second low-frequency wireless signal transmission unit. A method of switching the frequency of wireless signals according to the detected data stream codes is adopted by the invention, thereby solving the problem that diffraction of high-frequency wireless information is difficult in the place with many obstacles.
Description
Technical field
The present invention relates to a kind of information transmission system, particularly a kind of wireless audio and 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 broadband 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 technological like OFDM technology, COFDM, AD HOC technology etc., new vitality has been injected in emerging in large numbers to development of wireless communication devices of they.OFDM technology (orthogonal frequency division multiplexi) is the high speed transmission technology under a kind of wireless environment, and the COFDM technology then is the COFDM technology.Their advantage is: anti-fading ability is strong, and frequency efficiency is high, is fit to high speed data transfer, and anti-intersymbol interference (ISI) ability is strong.
Present most wireless audio and video signal transmission all adopts the high-frequency microwave of 2.4GHZ frequency range through IEEE802.11b/g wireless network card and the IEEE802.11a wireless bridge that is operated in 5.8GHZ, and the host-host protocol of other standard such as 802.11h, 802.11i, 802.11n.Use and adopt the OFDM technology to carry out the wireless audio and video signal like frequency range as high-frequency microwaves such as 2.4GHZ to transmit; At without hindrance or bar not for a long time; The transmission of the audio, video data of long distance can be under very little power, accomplished, and the good data transmission rate can be obtained; Yet, for some special places, as the scene of putting out a fire; And mine; These environment often need the individual working personnel to carry the entering of video/audio transmission equipment wherein, keep video or audio frequency to get in touch with extraneous command centre, because the more place of these place bars; The wireless microwave signal of high frequency (as following the employing 2.4GHz of 802.11 agreements or the wireless signal that transmits with upper frequency) has place its diffracting powers performance relatively poor of more bar at these; Can make that losing of data is very big in the data transmission procedure, directly influence the transmission rate and the efficient of data; If adopt big wavelength, the transmission equipment that transmission frequency is lower, though can solve the problem of the wireless microwave signal diffracting power of high frequency difference, in order to guarantee good transmission range, transmission rate and efficiency of transmission, this equipment then needs transmitting power greatly; Yet; Even if adopt big transmitting power equipment to send wireless microwave signal; Also still can bring some defectives, carry the powerful wireless transmitting device in the work of being in for a long time such as the people, its excessive transmitting power can cause damage to the healthy of people; Because powerful wireless transmitting device can produce very big heat, the people carries for a long time or bears and can feel uncomfortable.
Prior art has adopted several kinds of modes to solve the problems referred to above, and wherein, Chinese patent CN201063768Y discloses a kind of mine intrinsic safety type emergency management and rescue wireless audio and video repeater, belongs to the integration unit that wireless messages receives, transmits.Mainly be made up of dash receiver and expelling plate, dash receiver amplifies chip U2, video amplifier circuit U3 etc. by microcontroller U1, RF receiving circuit U4, voltage stabilizing chip U5, U6, audio frequency and forms; Expelling plate amplifies chip U8, video amplification chip U9, radio-frequency transmissions circuit U 10 etc. by microcontroller U7, audio frequency and forms.System links to each other the mode of all peripheral modules through bus with master controller, realize downhole wireless message pick-up, amplification and forwarding capability.The transmission method that can the audio/video information that the down-hole collects be carried out the relaying relay with wireless mode; Be forwarded to the wireless receiving platform; Send into down-hole industry control watch-dog; Perhaps utilize the down-hole EPA to extend and be sent to the ground industrial computer, it has solved the wireless remote relaying relay transmission of audio/video information in the rescue and relief work communication under the coal mine.Chinese patent CN10170763A visible wireless commanding device for mine rescure; Comprise headend equipment, trunking, ground receiving equipment; Headend equipment can be caught image scene under the situation of unusual low-light (level), in real time video/audio signal and downhole parameters data are sent to ground receiving equipment through trunking; Video, audio frequency and downhole parameters data under download of terrestrial service platform center and the storage well realize down-hole on-the-spot dynamic surveillance and commander.More than the wireless audio and video trunking that adopts of two patents, have under the situation of more bar though can solve, adopt the low-power high-frequency microwave normally to carry out the transmission of audio, video data; Yet, by the way, the position that the key factor of the formedness of determination data transmission is to install said repeater; Because the uncertainty of above-mentioned special geographical environment, can't guarantee in case of emergency and select suitable place that repeater is installed in a short period of time, thereby can't set up the excellent communications network at short notice; In addition, even put up repeater in these places in advance, also might be because the site surrounding fault causes the damage of equipment; Can't guarantee the unimpeded of communication network, moreover, even if do not destroyed; Also can make communications cost increase because of having increased repeater.
And present popular AD HOC (point-to-point) network technology; Like the Chinese patent publication number is that CN101174978A discloses a kind of wireless AD HOC network real-time multimedia video transmission method; Comprise, choose some paths that form by a plurality of transmission nodes (being transmission trunking) that available bandwidth satisfies the multimedia video transmission quality requirements as the main road or the backup path of advocating peace according to route requests; Utilize main path transmission real-time multimedia video, the testing result that lost efficacy when main path simultaneously switches to backup path and transmits, though it is poor to have solved high-frequency wireless signals diffraction, thereby causes the slow problem of transmission of wireless signals.But it has adopted at least one trunking as node in the process that realizes transmission of wireless signals, so makes communications cost increase; Likewise; Because the uncertainty of above-mentioned special geographical environment, can't guarantee in case of emergency and select suitable place to arrange in a short period of time, thereby can't set up the excellent communications network at short notice; In addition; Even put up transmission node in these places in advance, also might can't guarantee the unimpeded of communication network because the site surrounding fault causes the damage of equipment.
Summary of the invention
The present invention's technical problem that will solve is for this reason:
In having the more place of (more) bar; It is poor to solve existing high-frequency wireless signals transmission equipment transmission wireless signal diffraction; Communications cost is too high, and the said Radio Link of high speed can't normally be built, and high power transmission of wireless signals equipment brings the problem of damage to human body.
Therefore; Goal of the invention of the present invention is to propose a kind ofly can set up the said Radio Link of high speed apace in the place with more bar; When guaranteeing the transmission of wireless signals quality; Can reduce wireless signal again and bring damage, the low cost and the higher wireless audio and video transmission system of fail safe that adopt the mode frequently of changeing to realize to human body.
Therefore, a kind of wireless audio and video transmission system of the present invention comprises:
The mobile terminal, commander's end and Radio Link;
Said mobile terminal comprises:
The audio/video server unit is used for carrying out to the received signal audio-video signal and handles and send;
Information acquisition unit is connected with said audio/video server unit, is used for collection site information and converts signal to sending to said audio/video server unit;
Subscriber terminal unit is connected with said audio/video server unit, is used to receive the audio-video signal from said audio/video server unit, exports with the mode of analog signal;
The first high-frequency wireless signals transmission unit carries out the high-frequency wireless signals transmission through said Radio Link and extraneous high-frequency wireless signals transmission equipment;
Also comprise
The first low frequency wireless signal transmitting unit is carried out the low frequency transmission of wireless signals through said Radio Link and extraneous low frequency transmission of wireless signals equipment;
First detects converting unit; Respectively with said audio/video server unit; Said first high-frequency wireless signals transmission unit and the said first low frequency wireless signal transmitting unit connect; Said first detects the digital data transmission between converting unit completion and said audio/video server unit and said first high-frequency wireless signals transmission unit or the said first low frequency wireless signal transmitting unit, and said digital signal transmission path is switched between completion and said first high-frequency wireless signals transmission unit and the said first low frequency wireless signal transmitting unit;
Said commander's end comprises:
The network terminal is used for handling to the received signal and sending digital signal;
The second high-frequency wireless signals transmission unit carries out the high-frequency wireless signals transmission through said Radio Link and the said first high-frequency wireless signals transmission unit, and remains the state of shaking hands;
The second low frequency wireless signal transmitting unit is carried out the low frequency transmission of wireless signals through the said Radio Link and the first low frequency wireless signal transmitting unit;
Second detects converting unit; Respectively with the said network terminal; Said second high-frequency wireless signals transmission unit and the said second low frequency wireless signal transmitting unit connect; First detects the digital data transmission between converting unit completion and the said network terminal and said second high-frequency wireless signals transmission unit or the said second low frequency wireless signal transmitting unit, and said digital signal transmission path is switched between completion and said second high-frequency wireless signals transmission unit and the said second low frequency wireless signal transmitting unit;
Wherein, said digital signal transmission path is switched and is specially said first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When said transmission code stream is lower than preset value; Said first detects converting unit sends first switching command to the said first low frequency wireless signal transmitting unit, thereby opens the digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmitting unit; Correspondingly, said second detects converting unit sends second switching command to the said second high-frequency wireless signals transmission unit, thereby opens the digital signal transmission path that the said second low frequency wireless signal transmitting unit and said second detects converting unit; When said transmission code stream during more than or equal to said preset value; Said first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmitting unit, thereby closes the said digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmitting unit; Correspondingly, said second detects converting unit sends the 4th switching command to the said second low frequency wireless signal transmitting unit, thereby closes the said digital signal transmission path that the said second low frequency wireless signal transmitting unit and said second detects between converting unit.
Above-mentioned wireless audio and video transmission system; The said first high-frequency wireless signals transmission unit is that the first high frequency bridge and the said second high-frequency wireless signals transmission unit are the second high frequency bridge; Said first detects converting unit comprises and is used to detect first detection sub-unit of said transmission code stream and the first conversion subelement that is used to send said first switching command and said the 3rd switching command that is attached thereto, and said two detect converting units comprises and be used to detect second detection sub-unit of said transmission code stream and the second conversion subelement that is used to send second switching command and the 4th switching command that is attached thereto.
Above-mentioned wireless audio and video transmission system, the said first low frequency wireless signal transmitting unit comprises the first low frequency wireless signal transmission unit, the said second low frequency wireless signal transmitting unit comprises the second low frequency wireless signal receiving element.
Above-mentioned wireless audio and video transmission system, said mobile terminal also comprise and convert the low frequency wireless signal to analog signal output, independently low frequency wireless signal receiving system; Said commander end also comprises and receives analog signal and send with wireless signal, independently the low frequency wireless signal transmitting device.
Above-mentioned wireless audio and video transmission system, the said first low frequency wireless signal transmitting unit also comprises the first low frequency wireless signal receiving element, the said second low frequency wireless signal transmitting unit also comprises the second low frequency wireless signal transmission unit.
Above-mentioned wireless audio and video transmission system, said wireless signal are wireless microwave signal.
Above-mentioned wireless audio and video transmission system; The said first high-frequency wireless signals transmission unit is that transmission frequency is 2.4GHZ; Adopt orthogonal frequency division multiplexi and follow the first high frequency bridge of IEEE802.11 agreement; The said second high-frequency wireless signals transmission unit is that transmission frequency is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
Above-mentioned wireless audio and video transmission system; The said first low frequency wireless signal transmitting unit is first expelling plate of 250MHZ-600MHZ for adopting COFDM technology tranmitting frequency; With first power board that is connected with said first expelling plate, and first antenna that is connected with said first power board; The said second low frequency wireless signal receiving element comprises second dash receiver that receive frequency is identical with said first expelling plate and second antenna that is attached thereto.
Above-mentioned wireless audio and video transmission system; Said low frequency wireless signal receiving system is the data radio station receiver that first voice device connects, and said low frequency wireless signal transmitting device comprises second voice device and the data radio station transmitter that is connected with said second voice device.
Above-mentioned wireless audio and video transmission system; The said first low frequency wireless signal receiving element for respectively with said first first dash receiver that to detect receive frequency that converting unit is connected with said first power board and the said second expelling plate tranmitting frequency be 250MHZ-600MHZ; The said second low frequency wireless signal transmission unit is to detect converting unit with said second antenna and said second respectively to be connected tranmitting frequency and the second identical expelling plate of the said first dash receiver tranmitting frequency.
Above-mentioned wireless audio and video transmission system; The said first detection converting unit is first change-over panel; Said first change-over panel has three the one RJ45 interfaces that are connected with said audio/video server unit, the said first high frequency bridge, said first transmitter respectively; Be connected with said first power board with one, and be the first switching signal delivery outlet of said first power board power supply; Said second to detect converting unit be second change-over panel, and said second change-over panel has respectively two the 2nd RJ45 interfaces that are connected with said second dash receiver with the said second high frequency bridge.
Above-mentioned wireless audio and video transmission system; The said first detection converting unit is first change-over panel; Said first change-over panel has four the 3rd RJ45 interfaces that are connected with said audio/video server unit, the said first high frequency bridge, said first expelling plate and said first dash receiver respectively; Be connected with said first power board with one, and be the second switch signal output of said first power board power supply; Said second to detect converting unit be second change-over panel, and said second change-over panel has respectively three the 4th RJ45 interfaces that are connected with said second dash receiver and said second expelling plate with the said second high frequency bridge.
Above-mentioned wireless audio and video transmission system, the said network terminal of said commander's end is connected with router, and said router is connected with the 3rd high frequency bridge again, accomplishes the transmission of data.
Above-mentioned wireless audio and video transmission system comprises at least one bridge access point, and at least one high frequency bridge is connected with said bridge access point, accomplishes the transfer of data between many bridges.
Above-mentioned wireless audio and video transmission system, the power of the said first high-frequency wireless signals transmission unit are 0.1W.
Above-mentioned wireless audio and video transmission system, the power of the said first low frequency wireless signal transmitting unit are 1W-2W.
Technique scheme of the present invention is compared prior art and is had the following advantages:
1. the mobile terminal is respectively equipped with the first high-frequency wireless signals transmission unit and the first low frequency wireless signal transmitting unit; Commander end is respectively equipped with the second high-frequency wireless signals transmission unit and the second low frequency wireless signal transmitting unit, and said first detects converting unit and second detects converting unit and respectively between the two transmission code stream is detected; When said transmission code stream is lower than preset value; Said first detects converting unit sends first switching command to the said first low frequency wireless signal transmitting unit, thereby opens the digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmitting unit; Correspondingly, said second detects converting unit sends second switching command to the said second high-frequency wireless signals transmission unit, thereby opens the digital signal transmission path that the said second low frequency wireless signal transmitting unit and said second detects converting unit; When said transmission code stream during more than or equal to said preset value; Said first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmitting unit, thereby closes the said digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmitting unit; Correspondingly, said second detects converting unit sends the 4th switching command to the said second low frequency wireless signal transmitting unit, thereby closes the said digital signal transmission path that the said second low frequency wireless signal transmitting unit and said second detects between converting unit.Switch in path through carrying out with upper type, can guarantee can set up the said Radio Link of high speed apace in the place of more bar, when guaranteeing the transmission of wireless signals quality; Comparing the mode that always adopts the high-power transmission of wireless signals of low frequency reduces wireless signal and brings damage to human body; Adopt commentaries on classics frequency mode to realize the smooth transmission of wireless signal, compare and set up via node, or the backup network cost that adopts secondary node to set up is lower; In addition; Because wireless audio and video transmission system of the present invention is for to come transmission signals through Radio Link, therefore, in moving process; Can come to regulate adaptively the switching frequency of transmission path according to uncertain bar in the moving process, thereby obtain laser propagation effect preferably.
2. the said first high-frequency wireless signals transmission unit is that the first high frequency bridge and the said second high-frequency wireless signals transmission unit are the second high frequency bridge, can guarantee the transmission of wireless signals effect well.Said first detects converting unit comprises and is used to detect first detection sub-unit of said transmission code stream and the first conversion subelement that is used to send said first switching command and said the 3rd switching command that is attached thereto; Said two detect converting units comprises and is used to detect second detection sub-unit of said transmission code stream and the second conversion subelement that is used to send second switching command and the 4th switching command that is attached thereto, and can realize respectively transmission code stream is detected and to the switching of transmission path.
3. the first low frequency wireless signal transmitting unit comprises the first low frequency wireless signal transmission unit; The said second low frequency wireless signal transmitting unit comprises the second low frequency wireless signal receiving element, can realize the one-way transmission of holding wireless low frequency signal to commander from the mobile terminal of system.
4. said mobile terminal also comprises and converts the low frequency wireless signal to analog signal output, independently low frequency wireless signal receiving system; Said commander end also comprises and receives analog signal and send with wireless signal, independently the low frequency wireless signal transmitting device; Can realize holding the low frequency transmission of wireless signals of mobile terminal in place through using this low frequency wireless signal receiving system and emitter from commander with many bars.
5. said high frequency is the microwave frequency of 2.4GHZ, and said first high frequency bridge and the said second high frequency bridge are the employing orthogonal frequency division multiplexi, and follow the IEEE802.11 agreement; Meet international standard, make employed device versatility increase with compatible.
6. the low frequency frequency is that 250MHZ-600MHZ can transmit taking into account of property to wireless signal diffraction property and straight line, guarantees transmission quality.
7. said system comprises at least one bridge access point; At least one high frequency bridge is connected with said bridge access point; Not only can realize the transfer of data between many bridges; Reinstate other subsequent use bridge access point in the time of again can a bridge access point is out of touch therein, guarantee the unimpeded of network.
8. the power of the said first high-frequency wireless signals transmission unit is 0.1W; The power of the said first low frequency wireless signal transmitting unit is 1W-2W; The wireless signal that comes out through said power emission is very little to the damage of human body, under the situation of guaranteeing a network connections, has improved the fail safe of equipment to human body.
Description of drawings
For content of the present invention is more clearly understood, below according to a particular embodiment of the invention and combine accompanying drawing, the present invention is done further detailed explanation.
Fig. 1 is the sketch map of wireless audio and video transmission system;
Fig. 2 is the wireless audio and video transmission system sketch map with data radio station;
Fig. 3 is the wireless audio and video transmission system sketch map with first dash receiver;
Fig. 4 is the wireless audio and video transmission system sketch map that has router;
Fig. 5 is the wireless audio and video transmission system sketch map of inter-network bridge transfer of data;
Fig. 6 is the sound wireless audio and video transmission system sketch map with many bridges access point;
Embodiment
Wireless audio and video transmission system as shown in Figure 1 comprises:
The mobile terminal, commander's end;
Said mobile terminal comprises:
The audio/video server unit is used for carrying out to the received signal audio-video signal and handles and send;
Information acquisition unit is connected with said audio/video server unit, is used for collection site information and converts signal to sending to said audio/video server unit;
Subscriber terminal unit is connected with said audio/video server unit, is used to receive the audio, video data from said audio/video server unit, exports with the mode of analog signal;
The first high frequency bridge carries out the high-frequency wireless signals transmission through said Radio Link and extraneous high-frequency wireless signals transmission equipment, and the power of the said first high frequency bridge is 0.1W.
Also comprise
The first low frequency wireless signal transmission unit carries out the low frequency transmission of wireless signals through said Radio Link and extraneous low frequency transmission of wireless signals equipment, and the power of the said first low frequency wireless signal transmission unit is 1W-2W;
First detects converting unit; Respectively with said audio/video server unit; Said first high frequency bridge and the said first low frequency wireless signal transmission unit connect; Said first detects the digital data transmission between converting unit completion and said audio/video server unit and said first high frequency bridge or the said first low frequency wireless signal transmission unit, and said digital signal transmission path is switched between completion and said first high frequency bridge and the said first low frequency wireless signal transmission unit;
Said commander's end comprises:
The network terminal is used for handling to the received signal and sending digital signal;
The second high frequency bridge carries out the high-frequency wireless signals transmission through said Radio Link and the said first high frequency bridge, and remains the state of shaking hands;
The second low frequency wireless signal receiving element carries out the low frequency transmission of wireless signals through the said Radio Link and the first low frequency wireless signal transmission unit;
First detects converting unit; Respectively with the said network terminal; Said second high frequency bridge and the said second low frequency wireless signal receiving element connect; First detects the digital data transmission between converting unit completion and the said network terminal and said second high frequency bridge or the said second low frequency wireless signal receiving element, and said digital signal transmission path is switched between completion and said second high frequency bridge and the said second low frequency wireless signal receiving element;
Wherein, said digital signal transmission path is switched and is specially said first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When said transmission code stream is lower than preset value; Said first detects converting unit sends first switching command to the said first low frequency wireless signal transmission unit, thereby opens the digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmission unit; Correspondingly, said second detects converting unit sends second switching command to the said second high frequency bridge, thereby opens the digital signal transmission path that the said second low frequency wireless signal receiving element and said second detects converting unit; When said transmission code stream during more than or equal to said preset value; Said first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmission unit, thereby closes the said digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmission unit; Correspondingly, said second detects converting unit sends the 4th switching command to the said second low frequency wireless signal receiving element, thereby closes the said digital signal transmission path that the said second low frequency wireless signal receiving element and said second detects between converting unit.
Wherein, Said first detects converting unit comprises and is used to detect first detection sub-unit of said transmission code stream and the first conversion subelement that is used to send said first switching command and said the 3rd switching command that is attached thereto, and said two detect converting units comprises and be used to detect second detection sub-unit of said transmission code stream and the second conversion subelement that is used to send second switching command and the 4th switching command that is attached thereto.(not marking)
The transmission frequency that the said first high frequency bridge adopts is 2.4GHZ; And adopt orthogonal frequency division multiplexi and follow the IEEE802.11 agreement; The transmission frequency of the said second high frequency bridge is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
The said first low frequency wireless signal transmission unit is for adopting the COFDM technology; Tranmitting frequency is first expelling plate of 250MHZ-600MHZ; With first power board that is connected with said first expelling plate, and first antenna that is connected with said first power board; The said second low frequency wireless signal receiving element adopts COFDM technology (COFDM) to carry out transmission of wireless signals, comprises second dash receiver that receive frequency is identical with said first expelling plate and second antenna that is attached thereto.
Said first detects converting unit can be first change-over panel; Said first change-over panel has three the one RJ45 interfaces that are connected with said audio/video server unit, the said first high frequency bridge, said first transmitter respectively; Be connected with said first power board with one, and be the first switching signal delivery outlet of said first power board power supply; Said second to detect converting unit be second change-over panel, and said second change-over panel has respectively two the 2nd RJ45 interfaces (not marking) that are connected with said second dash receiver with the said second high frequency bridge.
In the present embodiment, said information acquisition unit can be camera, and said user terminal comprises microphone and receiver, and said mobile terminal is individual soldier's transmitter, and said commander's end is the command car receiver.
Embodiment 2
Wireless audio and video transmission system as shown in Figure 2 comprises:
The mobile terminal, commander's end;
Said mobile terminal comprises:
The audio/video server unit is used for carrying out to the received signal audio, video data and handles and send;
Information acquisition unit is connected with said audio/video server unit, is used for collection site information and converts signal to sending to said audio/video server unit;
Subscriber terminal unit is connected with said audio/video server unit, is used to receive the audio, video data from said audio/video server unit, exports with the mode of analog signal;
The first high frequency bridge carries out the high-frequency wireless signals transmission through said Radio Link and extraneous high-frequency wireless signals transmission equipment, and the power of the said first high frequency bridge is 0.1W;
Also comprise
The first low frequency wireless signal transmission unit carries out the low frequency transmission of wireless signals through said Radio Link and extraneous low frequency transmission of wireless signals equipment, and the power of the said first low frequency wireless signal transmission unit is 1W-2W;
First detects converting unit; Respectively with said audio/video server unit; Said first high frequency bridge and the said first low frequency wireless signal transmission unit connect; Said first detects the digital data transmission between converting unit completion and said audio/video server unit and said first high frequency bridge or the said first low frequency wireless signal transmission unit, and said digital signal transmission path is switched between completion and said first high frequency bridge and the said first low frequency wireless signal transmission unit;
Said commander's end comprises:
The network terminal is used for handling to the received signal and sending digital signal;
The second high frequency bridge carries out the high-frequency wireless signals transmission through said Radio Link and the said first high frequency bridge, and remains the state of shaking hands;
The second low frequency wireless signal receiving element carries out the low frequency transmission of wireless signals through the said Radio Link and the first low frequency wireless signal transmission unit;
Second detects converting unit; Respectively with the said network terminal; Said second high frequency bridge and the said second low frequency wireless signal receiving element connect; First detects the digital data transmission between converting unit completion and the said network terminal and said second high frequency bridge or the said second low frequency wireless signal receiving element, and said digital signal transmission path is switched between completion and said second high frequency bridge and the said second low frequency wireless signal receiving element;
Wherein, said digital signal transmission path is switched and is specially said first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When said transmission code stream is lower than preset value; Said first detects converting unit sends first switching command to the said first low frequency wireless signal transmission unit, thereby opens the digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmission unit; Correspondingly, said second detects converting unit sends second switching command to the said second high frequency bridge, thereby opens the digital signal transmission path that the said second low frequency wireless signal receiving element and said second detects converting unit; When said transmission code stream during more than or equal to said preset value; Said first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmission unit, thereby closes the said digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmission unit; Correspondingly, said second detects converting unit sends the 4th switching command to the said second low frequency wireless signal receiving element, thereby closes the said digital signal transmission path that the said second low frequency wireless signal receiving element and said second detects between converting unit.
Wherein, Said first detects converting unit comprises and is used to detect first detection sub-unit of said transmission code stream and the first conversion subelement that is used to send said first switching command and said the 3rd switching command that is attached thereto, and said two detect converting units comprises and be used to detect second detection sub-unit of said transmission code stream and the second conversion subelement that is used to send second switching command and the 4th switching command that is attached thereto.(not marking)
The transmission frequency that the said first high frequency bridge adopts is 2.4GHZ; And adopt orthogonal frequency division multiplexi and follow the IEEE802.11 agreement; The transmission frequency of the said second high frequency bridge is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
The said first low frequency wireless signal transmission unit is for adopting COFDM technology (COFDM); Tranmitting frequency is first expelling plate of 250MHZ-600MHZ; With first power board that is connected with said first expelling plate, and first antenna that is connected with said first power board; The said second low frequency wireless signal receiving element adopts COFDM technology (COFDM) to carry out transmission of wireless signals, comprises second dash receiver that receive frequency is identical with said first expelling plate and second antenna that is attached thereto.
Said first detects converting unit can be first change-over panel; Said first change-over panel has three the one RJ45 interfaces that are connected with said audio/video server unit, the said first high frequency bridge, said first transmitter respectively; Be connected with said first power board with one, and be the first switching signal delivery outlet of said first power board power supply; Said second to detect converting unit be second change-over panel, and said second change-over panel has respectively two the 2nd RJ45 interfaces (not marking) that are connected with said second dash receiver with the said second high frequency bridge.
Said mobile terminal also comprises and converts the low frequency wireless signal to analog signal output, independently low frequency wireless signal receiving system; Said commander end also comprises and receives analog signal and send with wireless signal; Low frequency wireless signal transmitting device independently; The wireless signal of low frequency described in present embodiment receiving system is the data radio station receiver that is connected with said user terminal, and said low frequency wireless signal transmitting device comprises voice device and the data radio station transmitter that is connected with said voice device.
In the present embodiment, said information acquisition unit is a camera, and said user terminal comprises microphone, and said mobile terminal is individual soldier's transmitter, and said commander's end is the command car receiver, and said first voice device is an earphone, and said second voice device is a microphone.
Embodiment 3
Wireless audio and video transmission system as shown in Figure 3 comprises:
The mobile terminal, commander's end;
Said mobile terminal comprises:
The audio/video server unit is used for carrying out to the received signal audio, video data and handles and send;
Information acquisition unit is connected with said audio/video server unit, is used for collection site information and converts signal to sending to said audio/video server unit;
Subscriber terminal unit is connected with said audio/video server unit, is used to receive the audio, video data from said audio/video server unit, exports with the mode of analog signal;
The first high frequency bridge carries out the high-frequency wireless signals transmission through said Radio Link and extraneous high-frequency wireless signals transmission equipment, and the power of the first high frequency bridge is 0.1W;
Also comprise
The first low frequency wireless signal transmission unit carries out the low frequency transmission of wireless signals through said Radio Link and extraneous low frequency transmission of wireless signals equipment, and the power of the said first low frequency wireless signal transmission unit is 1W-2W;
First detects converting unit; Respectively with said audio/video server unit; Said first high frequency bridge and the said first low frequency wireless signal transmission unit connect; Said first detects the digital data transmission between converting unit completion and said audio/video server unit and said first high frequency bridge or the said first low frequency wireless signal transmission unit, and said digital signal transmission path is switched between completion and said first high frequency bridge and the said first low frequency wireless signal transmission unit;
Said commander's end comprises:
The network terminal is used for handling to the received signal and sending digital signal;
The second high frequency bridge carries out the high-frequency wireless signals transmission through said Radio Link and the said first high frequency bridge, and remains the state of shaking hands;
The second low frequency wireless signal receiving element carries out the low frequency transmission of wireless signals through the said Radio Link and the first low frequency wireless signal transmission unit;
First detects converting unit; Respectively with the said network terminal; Said second high frequency bridge and the said second low frequency wireless signal receiving element connect; First detects the digital data transmission between converting unit completion and the said network terminal and said second high frequency bridge or the said second low frequency wireless signal receiving element, and said digital signal transmission path is switched between completion and said second high frequency bridge and the said second low frequency wireless signal receiving element;
Wherein, said digital signal transmission path is switched and is specially said first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When said transmission code stream is lower than preset value; Said first detects converting unit sends first switching command to the said first low frequency wireless signal transmission unit, thereby opens the digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmission unit; Correspondingly, said second detects converting unit sends second switching command to the said second high frequency bridge, thereby opens the digital signal transmission path that the said second low frequency wireless signal receiving element and said second detects converting unit; When said transmission code stream during more than or equal to said preset value; Said first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmission unit, thereby closes the said digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmission unit; Correspondingly, said second detects converting unit sends the 4th switching command to the said second low frequency wireless signal receiving element, thereby closes the said digital signal transmission path that the said second low frequency wireless signal receiving element and said second detects between converting unit.
Wherein, Said first detects converting unit comprises and is used to detect first detection sub-unit of said transmission code stream and the first conversion subelement that is used to send said first switching command and said the 3rd switching command that is attached thereto, and said two detect converting units comprises and be used to detect second detection sub-unit of said transmission code stream and the second conversion subelement (not marking) that is used to send second switching command and the 4th switching command that is attached thereto.
The said first low frequency wireless signal transmitting unit also comprises the first low frequency wireless signal receiving element, and the said second low frequency wireless signal transmitting unit also comprises the second low frequency wireless signal transmission unit.
The first low frequency wireless signal transmission unit described in the present embodiment adopts the COFDM technology to carry out transmission of wireless signals; Comprise that tranmitting frequency is first expelling plate of 250MHZ-600MHZ; With first power board that is connected with said first expelling plate, and first antenna that is connected with said first power board; The said second low frequency wireless signal receiving element adopts the COFDM technology to carry out transmission of wireless signals, comprises second dash receiver that receive frequency is identical with said first expelling plate and second antenna that is attached thereto.
The said first low frequency wireless signal receiving element is for respectively with said first to detect receive frequency and the said second expelling plate tranmitting frequency that converting unit is connected with said first power board be 250MHZ-600MHZ; Adopt the COFDM technology to carry out first dash receiver of transmission of wireless signals; The said second low frequency wireless signal transmission unit is to detect converting unit with said second antenna and said second respectively to be connected tranmitting frequency and the second identical expelling plate of the said first dash receiver tranmitting frequency.
The transmission frequency that the said first high frequency bridge adopts is 2.4GHZ; And adopt orthogonal frequency division multiplexi and follow the IEEE802.11 agreement; The transmission frequency of the said second high frequency bridge is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
The said first detection converting unit is first change-over panel; Said first change-over panel has four the 3rd RJ45 interfaces that are connected with said audio/video server unit, the said first high frequency bridge, said first expelling plate and said first dash receiver respectively; Be connected with said first power board with one, and be the second switch signal output of said first power board power supply; Said second to detect converting unit be second change-over panel, and said second change-over panel has respectively three the 4th RJ45 interfaces (not marking) that are connected with said second dash receiver and said second expelling plate with the said second high frequency bridge.
In the present embodiment, said information acquisition unit is a camera, and said user terminal comprises microphone, receiver and display, and said mobile terminal is individual soldier's transmitter, and said commander's end is the command car receiver.
Embodiment 4
Wireless audio and video transmission system as shown in Figure 4 comprises:
The mobile terminal, commander's end and Radio Link;
Said mobile terminal comprises:
The audio/video server unit is used for carrying out to the received signal audio, video data and handles and send;
Information acquisition unit is connected with said audio/video server unit, is used for collection site information and converts signal to sending to said audio/video server unit;
Subscriber terminal unit is connected with said audio/video server unit, is used to receive the audio, video data from said audio/video server unit, exports with the mode of analog signal;
The first high frequency bridge carries out the high-frequency wireless signals transmission through said Radio Link and extraneous high-frequency wireless signals transmission equipment, and the power of the first high frequency bridge is 0.1W;
Also comprise
The first low frequency wireless signal transmission unit carries out the low frequency transmission of wireless signals through said Radio Link and extraneous low frequency transmission of wireless signals equipment, and the power of the said first low frequency wireless signal transmission unit is 1W-2W;
First detects converting unit; Respectively with said audio/video server unit; Said first high frequency bridge and the said first low frequency wireless signal transmission unit connect; Said first detects the digital data transmission between converting unit completion and said audio/video server unit and said first high frequency bridge or the said first low frequency wireless signal transmission unit, and said digital signal transmission path is switched between completion and said first high frequency bridge and the said first low frequency wireless signal transmission unit;
Said commander's end comprises:
The network terminal is used for handling to the received signal and sending digital signal;
The second high frequency bridge carries out the high-frequency wireless signals transmission through said Radio Link and the said first high frequency bridge, and remains the state of shaking hands;
The second low frequency wireless signal receiving element carries out the low frequency transmission of wireless signals through the said Radio Link and the first low frequency wireless signal transmission unit;
First detects converting unit; Respectively with the said network terminal; Said second high frequency bridge and the said second low frequency wireless signal receiving element connect; First detects the digital data transmission between converting unit completion and the said network terminal and said second high frequency bridge or the said second low frequency wireless signal receiving element, and said digital signal transmission path is switched between completion and said second high frequency bridge and the said second low frequency wireless signal receiving element;
Wherein, said digital signal transmission path is switched and is specially said first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When said transmission code stream is lower than preset value; Said first detects converting unit sends first switching command to the said first low frequency wireless signal transmission unit, thereby opens the digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmission unit; Correspondingly, said second detects converting unit sends second switching command to the said second high frequency bridge, thereby opens the digital signal transmission path that the said second low frequency wireless signal receiving element and said second detects converting unit; When said transmission code stream during more than or equal to said preset value; Said first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmission unit, thereby closes the said digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmission unit; Correspondingly, said second detects converting unit sends the 4th switching command to the said second low frequency wireless signal receiving element, thereby closes the said digital signal transmission path that the said second low frequency wireless signal receiving element and said second detects between converting unit.
Wherein, Said first detects converting unit comprises and is used to detect first detection sub-unit of said transmission code stream and the first conversion subelement that is used to send said first switching command and said the 3rd switching command that is attached thereto, and said two detect converting units comprises and be used to detect second detection sub-unit of said transmission code stream and the second conversion subelement that is used to send second switching command and the 4th switching command that is attached thereto.(not marking)
The said first low frequency wireless signal transmitting unit also comprises the first low frequency wireless signal receiving element, and the said second low frequency wireless signal transmitting unit also comprises the second low frequency wireless signal transmission unit.
The first low frequency wireless signal transmission unit described in the present embodiment adopts the COFDM technology to carry out transmission of wireless signals; Comprise that tranmitting frequency is first expelling plate of 250MHZ-600MHZ; With first power board that is connected with said first expelling plate, and first antenna that is connected with said first power board; The said second low frequency wireless signal receiving element adopts the COFDM technology to carry out transmission of wireless signals, comprises second dash receiver that receive frequency is identical with said first expelling plate and second antenna that is attached thereto.
The said first low frequency wireless signal receiving element is for respectively with said first to detect receive frequency and the said second expelling plate tranmitting frequency that converting unit is connected with said first power board be 250MHZ-600MHZ; Adopt the COFDM technology to carry out first dash receiver of transmission of wireless signals; The said second low frequency wireless signal transmission unit is to detect converting unit with said second antenna and said second respectively to be connected tranmitting frequency and the second identical expelling plate of the said first dash receiver tranmitting frequency.
The transmission frequency that the said first high frequency bridge adopts is 2.4GHZ; And adopt orthogonal frequency division multiplexi and follow the IEEE802.11 agreement; The transmission frequency of the said second high frequency bridge is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
The said first detection converting unit is first change-over panel; Said first change-over panel has four the 3rd RJ45 interfaces that are connected with said audio/video server unit, the said first high frequency bridge, said first expelling plate and said first dash receiver respectively; Be connected with said first power board with one, and be the second switch signal output of said first power board power supply; Said second to detect converting unit be second change-over panel, and said second change-over panel has respectively three the 4th RJ45 interfaces (not marking) that are connected with said second dash receiver and said second expelling plate with the said second high frequency bridge.
In the present embodiment, said information acquisition unit is a camera, and said user terminal comprises microphone, receiver and display, and said mobile terminal is individual soldier's transmitter, and said commander's end is the command car receiver.
Said commander's end is connected with router, and said router is connected with at least one network terminal, and said router is connected with the 3rd high frequency bridge again, accomplishes the transmission of data, can be that wired connection also can be wireless connections with said bridge wherein.
Embodiment 5
This execution mode can be deformed into according to above-mentioned any one execution mode: wireless audio and video transmission system as shown in Figure 5; Wherein the network terminal with said commander is connected with router; Said router is connected with the 3rd bridge again, accomplishes the wireless transmission of data, and said the 3rd bridge is connected with bridge access point (AP) again; Said bridge access point is connected with a plurality of bridges again, and can accomplish the transmission of data inter-network bridge this moment.
Present embodiment can be modified to again: as shown in Figure 6; With the 3rd bridge; The 4th bridge is connected with the second bridge access point with the first bridge access point respectively with the 5th bridge, accomplishes the transfer of data of inter-network bridge, when one of them bridge access point breaks down; Can guarantee the normal transmission of data through another bridge access point, can be that wireless connections also can be wired connections with being connected of the said first bridge access point and the second bridge access point wherein.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to execution mode.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change according to varying in size of equipment.Here need not also can't give exhaustive to all execution modes.And conspicuous variation of being extended out thus or change still are among the protection range of the invention.
Claims (19)
1. wireless audio and video transmission system comprises:
The mobile terminal, commander's end;
Said mobile terminal comprises:
The audio/video server unit is used for carrying out to the received signal audio-video signal and handles and send;
Information acquisition unit is connected with said audio/video server unit, is used for collection site information and converts signal to sending to said audio/video server unit;
Subscriber terminal unit is connected with said audio/video server unit, is used to receive the audio-video signal from said audio/video server unit, exports with the mode of analog signal;
The first high-frequency wireless signals transmission unit carries out the high-frequency wireless signals transmission through Radio Link and extraneous high-frequency wireless signals transmission equipment;
It is characterized in that: also comprise
The first low frequency wireless signal transmitting unit is carried out the low frequency transmission of wireless signals through said Radio Link and extraneous low frequency transmission of wireless signals equipment;
First detects converting unit; Respectively with said audio/video server unit; Said first high-frequency wireless signals transmission unit and the said first low frequency wireless signal transmitting unit connect; Said first detects the digital data transmission between converting unit completion and said audio/video server unit and said first high-frequency wireless signals transmission unit or the said first low frequency wireless signal transmitting unit, and said digital signal transmission path is switched between completion and said first high-frequency wireless signals transmission unit and the said first low frequency wireless signal transmitting unit;
Said commander's end comprises:
The network terminal is used for handling to the received signal;
The second high-frequency wireless signals transmission unit carries out the high-frequency wireless signals transmission through said Radio Link and the said first high-frequency wireless signals transmission unit, and remains the state of shaking hands;
The second low frequency wireless signal transmitting unit is carried out the low frequency transmission of wireless signals through the said Radio Link and the first low frequency wireless signal transmitting unit;
Second detects converting unit; Respectively with the said network terminal; Said second high-frequency wireless signals transmission unit and the said second low frequency wireless signal transmitting unit connect; First detects the digital data transmission between converting unit completion and the said network terminal and said second high-frequency wireless signals transmission unit or the said second low frequency wireless signal transmitting unit, and said digital signal transmission path is switched between completion and said second high-frequency wireless signals transmission unit and the said second low frequency wireless signal transmitting unit;
Wherein, said digital signal transmission path is switched and is specially said first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When said transmission code stream is lower than preset value; Said first detects converting unit sends first switching command to the said first low frequency wireless signal transmitting unit, thereby opens the digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmitting unit; Correspondingly, said second detects converting unit sends second switching command to the said second high-frequency wireless signals transmission unit, thereby opens the digital signal transmission path that the said second low frequency wireless signal transmitting unit and said second detects converting unit; When said transmission code stream during more than or equal to said preset value; Said first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmitting unit, thereby closes the said digital signal transmission path between said first detection converting unit and the said first low frequency wireless signal transmitting unit; Correspondingly, said second detects converting unit sends the 4th switching command to the said second low frequency wireless signal transmitting unit, thereby closes the said digital signal transmission path that the said second low frequency wireless signal transmitting unit and said second detects between converting unit.
2. wireless audio and video transmission system according to claim 1; It is characterized in that: the said first high-frequency wireless signals transmission unit is that the first high frequency bridge and the said second high-frequency wireless signals transmission unit are the second high frequency bridge; Said first detects converting unit comprises and is used to detect first detection sub-unit of said transmission code stream and the first conversion subelement that is used to send said first switching command and said the 3rd switching command that is attached thereto, and said two detect converting units comprises and be used to detect second detection sub-unit of said transmission code stream and the second conversion subelement that is used to send second switching command and the 4th switching command that is attached thereto.
3. wireless audio and video transmission system according to claim 2; It is characterized in that: the said first low frequency wireless signal transmitting unit comprises the first low frequency wireless signal transmission unit, and the said second low frequency wireless signal transmitting unit comprises the second low frequency wireless signal receiving element.
4. wireless audio and video transmission system according to claim 3 is characterized in that: said mobile terminal also comprises and converts the low frequency wireless signal to analog signal output, independently low frequency wireless signal receiving system; Said commander end also comprises and receives analog signal and send with wireless signal, independently the low frequency wireless signal transmitting device.
5. wireless audio and video transmission system according to claim 3; It is characterized in that: the said first low frequency wireless signal transmitting unit also comprises the first low frequency wireless signal receiving element, and the said second low frequency wireless signal transmitting unit also comprises the second low frequency wireless signal transmission unit.
6. according to the arbitrary described wireless audio and video transmission system of claim 1-5, it is characterized in that: said wireless signal is wireless microwave signal.
7. wireless audio and video transmission system according to claim 6; It is characterized in that: the said first high-frequency wireless signals transmission unit is that transmission frequency is 2.4GHZ; Adopt the first high frequency bridge of orthogonal frequency division multiplexi and support IEEE802.11 host-host protocol; The said second high-frequency wireless signals transmission unit is that transmission frequency is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 host-host protocol.
8. wireless audio and video transmission system according to claim 7; It is characterized in that: the said first low frequency wireless signal transmitting unit is first expelling plate of 250MHZ-600MHZ for adopting COFDM technology tranmitting frequency; With first power board that is connected with said first expelling plate, and first antenna that is connected with said first power board; The said second low frequency wireless signal receiving element comprises second dash receiver that receive frequency is identical with said first expelling plate and second antenna that is attached thereto.
9. wireless audio and video transmission system according to claim 4 is characterized in that: said wireless signal is wireless microwave signal;
The said first high-frequency wireless signals transmission unit is that transmission frequency is 2.4GHZ; Adopt the first high frequency bridge of orthogonal frequency division multiplexi and support IEEE802.11 host-host protocol; The said second high-frequency wireless signals transmission unit is that transmission frequency is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 host-host protocol;
The said first low frequency wireless signal transmitting unit is first expelling plate of 250MHZ-600MHZ for adopting COFDM technology tranmitting frequency; With first power board that is connected with said first expelling plate, and first antenna that is connected with said first power board; The said second low frequency wireless signal receiving element comprises second dash receiver that receive frequency is identical with said first expelling plate and second antenna that is attached thereto;
Said low frequency wireless signal receiving system is the data radio station receiver that first voice device connects, and said low frequency wireless signal transmitting device comprises second voice device and the data radio station transmitter that is connected with said second voice device.
10. wireless audio and video transmission system according to claim 5 is characterized in that:
Said wireless signal is wireless microwave signal;
The said first high-frequency wireless signals transmission unit is that transmission frequency is 2.4GHZ; Adopt the first high frequency bridge of orthogonal frequency division multiplexi and support IEEE802.11 host-host protocol; The said second high-frequency wireless signals transmission unit is that transmission frequency is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 host-host protocol;
The said first low frequency wireless signal transmitting unit is first expelling plate of 250MHZ-600MHZ for adopting COFDM technology tranmitting frequency; With first power board that is connected with said first expelling plate, and first antenna that is connected with said first power board; The said second low frequency wireless signal receiving element comprises second dash receiver that receive frequency is identical with said first expelling plate and second antenna that is attached thereto;
The said first low frequency wireless signal receiving element is to be connected with said first power board with the said first detection converting unit respectively; Its receive frequency and the second expelling plate tranmitting frequency are first dash receiver of 250MHZ-600MHZ; The said second low frequency wireless signal transmission unit is to detect converting unit with said second antenna and said second respectively to be connected tranmitting frequency and the second identical expelling plate of the said first dash receiver tranmitting frequency.
11. wireless audio and video transmission system according to claim 9; It is characterized in that: the said first detection converting unit is first change-over panel; Said first change-over panel has three the one RJ45 interfaces that are connected with said audio/video server unit, the said first high frequency bridge, said first expelling plate respectively; Be connected with said first power board with one, and be the first switching signal delivery outlet of said first power board power supply; Said second to detect converting unit be second change-over panel, and said second change-over panel has respectively two the 2nd RJ45 interfaces that are connected with said second dash receiver with the said second high frequency bridge.
12. wireless audio and video transmission system according to claim 10; It is characterized in that: the said first detection converting unit is first change-over panel; Said first change-over panel has four the 3rd RJ45 interfaces that are connected with said audio/video server unit, the said first high frequency bridge, said first expelling plate and said first dash receiver respectively; Be connected with said first power board with one, and be the second switch signal output of said first power board power supply; Said second to detect converting unit be second change-over panel, and said second change-over panel has respectively three the 4th RJ45 interfaces that are connected with said second dash receiver and said second expelling plate with the said second high frequency bridge.
13. wireless audio and video transmission system according to claim 9 is characterized in that: the said network terminal of said commander's end is connected with router, and said router is connected with the 3rd high frequency bridge again, accomplishes the transmission of data.
14. wireless audio and video transmission system according to claim 12 is characterized in that: the said network terminal of said commander's end is connected with router, and said router is connected with the 3rd high frequency bridge again, accomplishes the transmission of data.
15. wireless audio and video transmission system according to claim 13 is characterized in that: comprise at least one bridge access point, at least one high frequency bridge is connected with said bridge access point, accomplishes the transfer of data between many bridges.
16. wireless audio and video transmission system according to claim 11 is characterized in that: the power of the said first high-frequency wireless signals transmission unit is 0.1W.
17. wireless audio and video transmission system according to claim 16 is characterized in that: the power of the said first low frequency wireless signal transmitting unit is 1W-2W.
18. wireless audio and video transmission system according to claim 15 is characterized in that: the power of the said first high-frequency wireless signals transmission unit is 0.1W.
19. wireless audio and video transmission system according to claim 18 is characterized in that: the power of the said first low frequency wireless signal transmitting unit is 1W-2W.
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| CN2010102715922A CN101969390B (en) | 2010-09-02 | 2010-09-02 | Wireless audio and video transmission system |
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| CN102833528A (en) * | 2012-09-10 | 2012-12-19 | 武汉华中天经光电系统有限公司 | Wireless audio and video monitoring system |
| CN104270596A (en) * | 2014-10-21 | 2015-01-07 | 北京欧远致科技有限公司 | Non-line-of-sight visual command communication system |
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| CN101174978B (en) * | 2006-10-31 | 2010-05-19 | 中兴通讯股份有限公司 | Wireless Ad hoc network real-time multimedia video transmission method |
| CN101070763A (en) * | 2007-06-14 | 2007-11-14 | 赵凤济 | Visible wireless commanding device for mine rescure |
| CN201846431U (en) * | 2010-09-02 | 2011-05-25 | 北京惟泰安全设备有限公司 | Wireless audio and video transmission system |
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