CN101969390A - Wireless audio and video transmission system - Google Patents
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- CN101969390A CN101969390A CN 201010271592 CN201010271592A CN101969390A CN 101969390 A CN101969390 A CN 101969390A CN 201010271592 CN201010271592 CN 201010271592 CN 201010271592 A CN201010271592 A CN 201010271592A CN 101969390 A CN101969390 A CN 101969390A
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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, as OFDM technology, COFDM technology, 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 Coded Orthogonal Frequency Division Multiplexing (COFDM) technology.Their advantage is: anti-fading ability is strong, and the frequency efficiency height is fit to high speed data transfer, and anti-intersymbol interference (ISI) ability is strong.
The high-frequency microwave that the 2.4GHZ frequency range is all adopted in present most wireless audio and video signal transmission is by the IEEE802.11b/g wireless network card and be operated in the IEEE802.11a wireless bridge of 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 as 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, finished, 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 independent staff to carry the video/audio transmission equipment to enter 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 in the data transmission procedure, losing of data is very big, has directly influenced 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 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 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 of dash receiver and expelling plate, dash receiver amplifies chip U2, video amplifier circuit U3 etc. by microcontroller U1, radio-frequency (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 by bus with master controller, realize downhole wireless message pick-up, amplification and forwarding capability.The audio/video information that the down-hole can be collected carries out the transmission method of relaying relay wirelessly, be forwarded to the wireless receiving platform, send into down-hole industry control watch-dog, perhaps utilize the down-hole Industrial Ethernet 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 under the situation of unusual low-light (level), catch image scene, 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 realize dynamic surveillance and commander to the scene, down-hole under download of terrestrial service platform center and the storage well.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 described repeater, because the uncertainty of above-mentioned special geographical environment, can't guarantee in case of emergency and in a short period of time to select suitable place that repeater is installed, 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 can't guarantee the unimpeded of communication network because the site surrounding fault causes the damage of equipment, 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, as the Chinese patent publication number is that CN101174978A discloses a kind of wireless AD HOC network real-time multimedia video transmission method, comprise, choose available bandwidth according to route requests and satisfy some the paths that form by a plurality of transmission nodes (being transmission trunking) of multimedia video transmission quality requirements as the main road or the backup path of advocating peace; Utilize main path transmission real-time multimedia video, the testing result of working as the main path inefficacy 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 is in the process that realizes transmission of wireless signals, adopted at least one trunking as node, so make communications cost increase, similarly, because the uncertainty of above-mentioned special geographical environment, can't guarantee in case of emergency and in a short period of time to select suitable place to arrange, 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 technical problem to be solved in the present invention 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 described 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 described 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;
Described 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 described audio/video server unit, is used for collection site information and converts signal to sending to described audio/video server unit;
Subscriber terminal unit is connected with described audio/video server unit, is used to receive the audio-video signal from described audio/video server unit, exports in the mode of analog signal;
The first high-frequency wireless signals transmission unit carries out the high-frequency wireless signals transmission by described 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 by described Radio Link and extraneous low frequency transmission of wireless signals equipment;
First detects converting unit, respectively with described audio/video server unit, described first high-frequency wireless signals transmission unit and the described first low frequency wireless signal transmitting unit connect, described first detect that converting unit is finished and described audio/video server unit and described first high-frequency wireless signals transmission unit or the described first low frequency wireless signal transmitting unit between digital data transmission, and finish and described first high-frequency wireless signals transmission unit and the described first low frequency wireless signal transmitting unit between described digital signal transmission path switch;
Described 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 by described Radio Link and the described 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 by the described Radio Link and the first low frequency wireless signal transmitting unit;
Second detects converting unit, respectively with the described network terminal, described second high-frequency wireless signals transmission unit and the described second low frequency wireless signal transmitting unit connect, first detect that converting unit is finished and the described network terminal and described second high-frequency wireless signals transmission unit or the described second low frequency wireless signal transmitting unit between digital data transmission, and finish and described second high-frequency wireless signals transmission unit and the described second low frequency wireless signal transmitting unit between described digital signal transmission path switch;
Wherein, described digital signal transmission path is switched and is specially described first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When described transmission code stream is lower than preset value, described first detects converting unit sends first switching command to the described first low frequency wireless signal transmitting unit, thereby opens described first digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmitting unit; Correspondingly, described second detects converting unit sends second switching command to the described second high-frequency wireless signals transmission unit, thereby opens the digital signal transmission path that the described second low frequency wireless signal transmitting unit and described second detects converting unit; When described transmission code stream during more than or equal to described preset value, described first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmitting unit, thereby closes the described first described digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmitting unit; Correspondingly, described second detects converting unit sends the 4th switching command to the described second low frequency wireless signal transmitting unit, thereby closes the described second low frequency wireless signal transmitting unit and the described second described digital signal transmission path that detects between converting unit.
Above-mentioned wireless audio and video transmission system, the described first high-frequency wireless signals transmission unit is that the first high frequency bridge and the described second high-frequency wireless signals transmission unit are the second high frequency bridge, described first detects converting unit comprises and is used to the first conversion subelement that is used to send described first switching command and described the 3rd switching command that detects first detection sub-unit of described transmission code stream and be attached thereto, and described two detect converting units comprises and be used to the second conversion subelement that is used to send second switching command and the 4th switching command that detects second detection sub-unit of described transmission code stream and be attached thereto.
Above-mentioned wireless audio and video transmission system, the described first low frequency wireless signal transmitting unit comprises the first low frequency wireless signal transmission unit, the described second low frequency wireless signal transmitting unit comprises the second low frequency wireless signal receiving element.
Above-mentioned wireless audio and video transmission system, described mobile terminal also comprise and convert the low frequency wireless signal to analog signal output, independently low frequency wireless signal receiving system; Described 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 described first low frequency wireless signal transmitting unit also comprises the first low frequency wireless signal receiving element, the described 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, described wireless signal are wireless microwave signal.
Above-mentioned wireless audio and video transmission system, the described 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 described 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 described first low frequency wireless signal transmitting unit is first expelling plate of 250MHZ-600MHZ for adopting Coded Orthogonal Frequency Division Multiplexing (COFDM) technology tranmitting frequency, with first power board that is connected with described first expelling plate, and first antenna that is connected with described first power board; The described second low frequency wireless signal receiving element comprises second dash receiver that receive frequency is identical with described first expelling plate and second antenna that is attached thereto.
Above-mentioned wireless audio and video transmission system, described low frequency wireless signal receiving system is the data radio station receiver that first voice device connects, and described low frequency wireless signal transmitting device comprises second voice device and the data radio station transmitter that is connected with described second voice device.
Above-mentioned wireless audio and video transmission system, the described first low frequency wireless signal receiving element for respectively with described first first dash receiver that to detect receive frequency that converting unit is connected with described first power board and the described second expelling plate tranmitting frequency be 250MHZ-600MHZ, the described second low frequency wireless signal transmission unit is to detect converting unit with described second antenna and described second respectively to be connected tranmitting frequency and the second identical expelling plate of the described first dash receiver tranmitting frequency.
Above-mentioned wireless audio and video transmission system, the described first detection converting unit is first change-over panel, described first change-over panel has three the one RJ45 interfaces that are connected with described audio/video server unit, the described first high frequency bridge, described first transmitter respectively, be connected with described first power board with one, and be the first switching signal delivery outlet of described first power board power supply; Described second to detect converting unit be second change-over panel, and described second change-over panel has respectively two the 2nd RJ45 interfaces that are connected with described second dash receiver with the described second high frequency bridge.
Above-mentioned wireless audio and video transmission system, the described first detection converting unit is first change-over panel, described first change-over panel has four the 3rd RJ45 interfaces that are connected with described audio/video server unit, the described first high frequency bridge, described first expelling plate and described first dash receiver respectively, be connected with described first power board with one, and be the second switch signal output of described first power board power supply; Described second to detect converting unit be second change-over panel, and described second change-over panel has respectively three the 4th RJ45 interfaces that are connected with described second dash receiver and described second expelling plate with the described second high frequency bridge.
Above-mentioned wireless audio and video transmission system, the described network terminal of described commander's end is connected with router, and described router is connected with the 3rd high frequency bridge again, finishes 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 described bridge access point, finishes the transfer of data between many bridges.
Above-mentioned wireless audio and video transmission system, the power of the described first high-frequency wireless signals transmission unit are 0.1W.
Above-mentioned wireless audio and video transmission system, the power of the described first low frequency wireless signal transmitting unit are 1W-2W.
Technique scheme of the present invention has the following advantages compared to existing technology:
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 described first detects converting unit and second detects converting unit and respectively between the two transmission code stream is detected; When described transmission code stream is lower than preset value, described first detects converting unit sends first switching command to the described first low frequency wireless signal transmitting unit, thereby opens described first digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmitting unit; Correspondingly, described second detects converting unit sends second switching command to the described second high-frequency wireless signals transmission unit, thereby opens the digital signal transmission path that the described second low frequency wireless signal transmitting unit and described second detects converting unit; When described transmission code stream during more than or equal to described preset value, described first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmitting unit, thereby closes the described first described digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmitting unit; Correspondingly, described second detects converting unit sends the 4th switching command to the described second low frequency wireless signal transmitting unit, thereby closes the described second low frequency wireless signal transmitting unit and the described second described digital signal transmission path that detects between converting unit.Switch by the path of carrying out with upper type, can guarantee to set up the described 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 by Radio Link, therefore, in moving process, can regulate the switching frequency of transmission path adaptively according to uncertain bar in the moving process, thereby obtain laser propagation effect preferably.
2. the described first high-frequency wireless signals transmission unit is that the first high frequency bridge and the described second high-frequency wireless signals transmission unit are the second high frequency bridge, can guarantee the transmission of wireless signals effect well.Described first detects converting unit comprises and is used to the first conversion subelement that is used to send described first switching command and described the 3rd switching command that detects first detection sub-unit of described transmission code stream and be attached thereto, described two detect converting units comprises and is used to the second conversion subelement that is used to send second switching command and the 4th switching command that detects second detection sub-unit of described transmission code stream and be attached thereto, 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 described 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. described mobile terminal also comprises and converts the low frequency wireless signal to analog signal output, independently low frequency wireless signal receiving system; Described 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 by using this low frequency wireless signal receiving system and emitter from commander with many bars.
5. described high frequency is the microwave frequency of 2.4GHZ, and described first high frequency bridge and the described second high frequency bridge are the employing orthogonal frequency division multiplexi, and follow the IEEE802.11 agreement; Meet international standard, make employed device versatility and compatibility increase.
6. the low frequency frequency is that 250MHZ-600MHZ can transmit taking into account of property to wireless signal diffraction and straight line, guarantees transmission quality.
7. described system comprises at least one bridge access point, at least one high frequency bridge is connected with described bridge access point, not only can realize the transfer of data between many bridges, reinstate other standby 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 described first high-frequency wireless signals transmission unit is 0.1W, the power of the described first low frequency wireless signal transmitting unit is 1W-2W, the wireless signal that comes out by described power emission is very little to the damage of human body, has improved the fail safe of equipment to human body under the situation of guaranteeing a network connections.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation.
Fig. 1 is the schematic diagram of wireless audio and video transmission system;
Fig. 2 is the wireless audio and video transmission system schematic diagram with data radio station;
Fig. 3 is the wireless audio and video transmission system schematic diagram with first dash receiver;
Fig. 4 is the wireless audio and video transmission system schematic diagram that has router;
Fig. 5 is the wireless audio and video transmission system schematic diagram of inter-network bridge transfer of data;
Fig. 6 is the sound wireless audio and video transmission system schematic diagram with many bridges access point;
Embodiment
Wireless audio and video transmission system as shown in Figure 1 comprises:
The mobile terminal, commander's end;
Described 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 described audio/video server unit, is used for collection site information and converts signal to sending to described audio/video server unit;
Subscriber terminal unit is connected with described audio/video server unit, is used to receive the audio, video data from described audio/video server unit, exports in the mode of analog signal;
The first high frequency bridge carries out the high-frequency wireless signals transmission by described Radio Link and extraneous high-frequency wireless signals transmission equipment, and the power of the described 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 by described Radio Link and extraneous low frequency transmission of wireless signals equipment, and the power of the described first low frequency wireless signal transmission unit is 1W-2W;
First detects converting unit, respectively with described audio/video server unit, described first high frequency bridge and the described first low frequency wireless signal transmission unit connect, described first detect that converting unit is finished and described audio/video server unit and described first high frequency bridge or the described first low frequency wireless signal transmission unit between digital data transmission, and finish and described first high frequency bridge and the described first low frequency wireless signal transmission unit between described digital signal transmission path switch;
Described 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 by described Radio Link and the described 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 by the described Radio Link and the first low frequency wireless signal transmission unit;
First detects converting unit, respectively with the described network terminal, described second high frequency bridge and the described second low frequency wireless signal receiving element connect, first detect that converting unit is finished and the described network terminal and described second high frequency bridge or the described second low frequency wireless signal receiving element between digital data transmission, and finish and described second high frequency bridge and the described second low frequency wireless signal receiving element between described digital signal transmission path switch;
Wherein, described digital signal transmission path is switched and is specially described first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When described transmission code stream is lower than preset value, described first detects converting unit sends first switching command to the described first low frequency wireless signal transmission unit, thereby opens described first digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmission unit; Correspondingly, described second detects converting unit sends second switching command to the described second high frequency bridge, thereby opens the digital signal transmission path that the described second low frequency wireless signal receiving element and described second detects converting unit; When described transmission code stream during more than or equal to described preset value, described first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmission unit, thereby closes the described first described digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmission unit; Correspondingly, described second detects converting unit sends the 4th switching command to the described second low frequency wireless signal receiving element, thereby closes the described second low frequency wireless signal receiving element and the described second described digital signal transmission path that detects between converting unit.
Wherein, described first detects converting unit comprises and is used to the first conversion subelement that is used to send described first switching command and described the 3rd switching command that detects first detection sub-unit of described transmission code stream and be attached thereto, and described two detect converting units comprises and be used to the second conversion subelement that is used to send second switching command and the 4th switching command that detects second detection sub-unit of described transmission code stream and be attached thereto.(not marking)
The transmission frequency that the described 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 described second high frequency bridge is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
The described first low frequency wireless signal transmission unit is for adopting the Coded Orthogonal Frequency Division Multiplexing (COFDM) technology, tranmitting frequency is first expelling plate of 250MHZ-600MHZ, with first power board that is connected with described first expelling plate, and first antenna that is connected with described first power board; The described second low frequency wireless signal receiving element adopts Coded Orthogonal Frequency Division Multiplexing (COFDM) technology (COFDM) to carry out transmission of wireless signals, comprises second dash receiver that receive frequency is identical with described first expelling plate and second antenna that is attached thereto.
Described first detects converting unit can be first change-over panel, described first change-over panel has three the one RJ45 interfaces that are connected with described audio/video server unit, the described first high frequency bridge, described first transmitter respectively, be connected with described first power board with one, and be the first switching signal delivery outlet of described first power board power supply; Described second to detect converting unit be second change-over panel, and described second change-over panel has respectively two the 2nd RJ45 interfaces (not marking) that are connected with described second dash receiver with the described second high frequency bridge.
In the present embodiment, described information acquisition unit can be camera, and described user terminal comprises microphone and receiver, and described mobile terminal is individual soldier's transmitter, and described 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;
Described 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 described audio/video server unit, is used for collection site information and converts signal to sending to described audio/video server unit;
Subscriber terminal unit is connected with described audio/video server unit, is used to receive the audio, video data from described audio/video server unit, exports in the mode of analog signal;
The first high frequency bridge carries out the high-frequency wireless signals transmission by described Radio Link and extraneous high-frequency wireless signals transmission equipment, and the power of the described 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 by described Radio Link and extraneous low frequency transmission of wireless signals equipment, and the power of the described first low frequency wireless signal transmission unit is 1W-2W;
First detects converting unit, respectively with described audio/video server unit, described first high frequency bridge and the described first low frequency wireless signal transmission unit connect, described first detect that converting unit is finished and described audio/video server unit and described first high frequency bridge or the described first low frequency wireless signal transmission unit between digital data transmission, and finish and described first high frequency bridge and the described first low frequency wireless signal transmission unit between described digital signal transmission path switch;
Described 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 by described Radio Link and the described 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 by the described Radio Link and the first low frequency wireless signal transmission unit;
Second detects converting unit, respectively with the described network terminal, described second high frequency bridge and the described second low frequency wireless signal receiving element connect, first detect that converting unit is finished and the described network terminal and described second high frequency bridge or the described second low frequency wireless signal receiving element between digital data transmission, and finish and described second high frequency bridge and the described second low frequency wireless signal receiving element between described digital signal transmission path switch;
Wherein, described digital signal transmission path is switched and is specially described first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When described transmission code stream is lower than preset value, described first detects converting unit sends first switching command to the described first low frequency wireless signal transmission unit, thereby opens described first digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmission unit; Correspondingly, described second detects converting unit sends second switching command to the described second high frequency bridge, thereby opens the digital signal transmission path that the described second low frequency wireless signal receiving element and described second detects converting unit; When described transmission code stream during more than or equal to described preset value, described first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmission unit, thereby closes the described first described digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmission unit; Correspondingly, described second detects converting unit sends the 4th switching command to the described second low frequency wireless signal receiving element, thereby closes the described second low frequency wireless signal receiving element and the described second described digital signal transmission path that detects between converting unit.
Wherein, described first detects converting unit comprises and is used to the first conversion subelement that is used to send described first switching command and described the 3rd switching command that detects first detection sub-unit of described transmission code stream and be attached thereto, and described two detect converting units comprises and be used to the second conversion subelement that is used to send second switching command and the 4th switching command that detects second detection sub-unit of described transmission code stream and be attached thereto.(not marking)
The transmission frequency that the described 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 described second high frequency bridge is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
The described first low frequency wireless signal transmission unit is for adopting Coded Orthogonal Frequency Division Multiplexing (COFDM) technology (COFDM), tranmitting frequency is first expelling plate of 250MHZ-600MHZ, with first power board that is connected with described first expelling plate, and first antenna that is connected with described first power board; The described second low frequency wireless signal receiving element adopts Coded Orthogonal Frequency Division Multiplexing (COFDM) technology (COFDM) to carry out transmission of wireless signals, comprises second dash receiver that receive frequency is identical with described first expelling plate and second antenna that is attached thereto.
Described first detects converting unit can be first change-over panel, described first change-over panel has three the one RJ45 interfaces that are connected with described audio/video server unit, the described first high frequency bridge, described first transmitter respectively, be connected with described first power board with one, and be the first switching signal delivery outlet of described first power board power supply; Described second to detect converting unit be second change-over panel, and described second change-over panel has respectively two the 2nd RJ45 interfaces (not marking) that are connected with described second dash receiver with the described second high frequency bridge.
Described mobile terminal also comprises and converts the low frequency wireless signal to analog signal output, independently low frequency wireless signal receiving system; Described 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 described user terminal, and described low frequency wireless signal transmitting device comprises voice device and the data radio station transmitter that is connected with described voice device.
In the present embodiment, described information acquisition unit is a camera, and described user terminal comprises microphone, and described mobile terminal is individual soldier's transmitter, and described commander's end is the command car receiver, and described first voice device is an earphone, and described 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;
Described 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 described audio/video server unit, is used for collection site information and converts signal to sending to described audio/video server unit;
Subscriber terminal unit is connected with described audio/video server unit, is used to receive the audio, video data from described audio/video server unit, exports in the mode of analog signal;
The first high frequency bridge carries out the high-frequency wireless signals transmission by described 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 by described Radio Link and extraneous low frequency transmission of wireless signals equipment, and the power of the described first low frequency wireless signal transmission unit is 1W-2W;
First detects converting unit, respectively with described audio/video server unit, described first high frequency bridge and the described first low frequency wireless signal transmission unit connect, described first detect that converting unit is finished and described audio/video server unit and described first high frequency bridge or the described first low frequency wireless signal transmission unit between digital data transmission, and finish and described first high frequency bridge and the described first low frequency wireless signal transmission unit between described digital signal transmission path switch;
Described 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 by described Radio Link and the described 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 by the described Radio Link and the first low frequency wireless signal transmission unit;
First detects converting unit, respectively with the described network terminal, described second high frequency bridge and the described second low frequency wireless signal receiving element connect, first detect that converting unit is finished and the described network terminal and described second high frequency bridge or the described second low frequency wireless signal receiving element between digital data transmission, and finish and described second high frequency bridge and the described second low frequency wireless signal receiving element between described digital signal transmission path switch;
Wherein, described digital signal transmission path is switched and is specially described first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When described transmission code stream is lower than preset value, described first detects converting unit sends first switching command to the described first low frequency wireless signal transmission unit, thereby opens described first digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmission unit; Correspondingly, described second detects converting unit sends second switching command to the described second high frequency bridge, thereby opens the digital signal transmission path that the described second low frequency wireless signal receiving element and described second detects converting unit; When described transmission code stream during more than or equal to described preset value, described first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmission unit, thereby closes the described first described digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmission unit; Correspondingly, described second detects converting unit sends the 4th switching command to the described second low frequency wireless signal receiving element, thereby closes the described second low frequency wireless signal receiving element and the described second described digital signal transmission path that detects between converting unit.
Wherein, described first detects converting unit comprises and is used to the first conversion subelement that is used to send described first switching command and described the 3rd switching command that detects first detection sub-unit of described transmission code stream and be attached thereto, and described two detect converting units comprises and be used to the second conversion subelement (not marking) that is used to send second switching command and the 4th switching command that detects second detection sub-unit of described transmission code stream and be attached thereto.
The described first low frequency wireless signal transmitting unit also comprises the first low frequency wireless signal receiving element, and the described 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 Coded Orthogonal Frequency Division Multiplexing (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 described first expelling plate, and first antenna that is connected with described first power board; The described second low frequency wireless signal receiving element adopts the Coded Orthogonal Frequency Division Multiplexing (COFDM) technology to carry out transmission of wireless signals, comprises second dash receiver that receive frequency is identical with described first expelling plate and second antenna that is attached thereto.
The described first low frequency wireless signal receiving element is for respectively with described first to detect receive frequency and the described second expelling plate tranmitting frequency that converting unit is connected with described first power board be 250MHZ-600MHZ, adopt the Coded Orthogonal Frequency Division Multiplexing (COFDM) technology to carry out first dash receiver of transmission of wireless signals, the described second low frequency wireless signal transmission unit is to detect converting unit with described second antenna and described second respectively to be connected tranmitting frequency and the second identical expelling plate of the described first dash receiver tranmitting frequency.
The transmission frequency that the described 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 described second high frequency bridge is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
The described first detection converting unit is first change-over panel, described first change-over panel has four the 3rd RJ45 interfaces that are connected with described audio/video server unit, the described first high frequency bridge, described first expelling plate and described first dash receiver respectively, be connected with described first power board with one, and be the second switch signal output of described first power board power supply; Described second to detect converting unit be second change-over panel, and described second change-over panel has respectively three the 4th RJ45 interfaces (not marking) that are connected with described second dash receiver and described second expelling plate with the described second high frequency bridge.
In the present embodiment, described information acquisition unit is a camera, and described user terminal comprises microphone, receiver and display, and described mobile terminal is individual soldier's transmitter, and described 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;
Described 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 described audio/video server unit, is used for collection site information and converts signal to sending to described audio/video server unit;
Subscriber terminal unit is connected with described audio/video server unit, is used to receive the audio, video data from described audio/video server unit, exports in the mode of analog signal;
The first high frequency bridge carries out the high-frequency wireless signals transmission by described 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 by described Radio Link and extraneous low frequency transmission of wireless signals equipment, and the power of the described first low frequency wireless signal transmission unit is 1W-2W;
First detects converting unit, respectively with described audio/video server unit, described first high frequency bridge and the described first low frequency wireless signal transmission unit connect, described first detect that converting unit is finished and described audio/video server unit and described first high frequency bridge or the described first low frequency wireless signal transmission unit between digital data transmission, and finish and described first high frequency bridge and the described first low frequency wireless signal transmission unit between described digital signal transmission path switch;
Described 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 by described Radio Link and the described 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 by the described Radio Link and the first low frequency wireless signal transmission unit;
First detects converting unit, respectively with the described network terminal, described second high frequency bridge and the described second low frequency wireless signal receiving element connect, first detect that converting unit is finished and the described network terminal and described second high frequency bridge or the described second low frequency wireless signal receiving element between digital data transmission, and finish and described second high frequency bridge and the described second low frequency wireless signal receiving element between described digital signal transmission path switch;
Wherein, described digital signal transmission path is switched and is specially described first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When described transmission code stream is lower than preset value, described first detects converting unit sends first switching command to the described first low frequency wireless signal transmission unit, thereby opens described first digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmission unit; Correspondingly, described second detects converting unit sends second switching command to the described second high frequency bridge, thereby opens the digital signal transmission path that the described second low frequency wireless signal receiving element and described second detects converting unit; When described transmission code stream during more than or equal to described preset value, described first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmission unit, thereby closes the described first described digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmission unit; Correspondingly, described second detects converting unit sends the 4th switching command to the described second low frequency wireless signal receiving element, thereby closes the described second low frequency wireless signal receiving element and the described second described digital signal transmission path that detects between converting unit.
Wherein, described first detects converting unit comprises and is used to the first conversion subelement that is used to send described first switching command and described the 3rd switching command that detects first detection sub-unit of described transmission code stream and be attached thereto, and described two detect converting units comprises and be used to the second conversion subelement that is used to send second switching command and the 4th switching command that detects second detection sub-unit of described transmission code stream and be attached thereto.(not marking)
The described first low frequency wireless signal transmitting unit also comprises the first low frequency wireless signal receiving element, and the described 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 Coded Orthogonal Frequency Division Multiplexing (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 described first expelling plate, and first antenna that is connected with described first power board; The described second low frequency wireless signal receiving element adopts the Coded Orthogonal Frequency Division Multiplexing (COFDM) technology to carry out transmission of wireless signals, comprises second dash receiver that receive frequency is identical with described first expelling plate and second antenna that is attached thereto.
The described first low frequency wireless signal receiving element is for respectively with described first to detect receive frequency and the described second expelling plate tranmitting frequency that converting unit is connected with described first power board be 250MHZ-600MHZ, adopt the Coded Orthogonal Frequency Division Multiplexing (COFDM) technology to carry out first dash receiver of transmission of wireless signals, the described second low frequency wireless signal transmission unit is to detect converting unit with described second antenna and described second respectively to be connected tranmitting frequency and the second identical expelling plate of the described first dash receiver tranmitting frequency.
The transmission frequency that the described 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 described second high frequency bridge is 2.4GHZ, adopts orthogonal frequency division multiplexi and follows the second high frequency bridge of IEEE802.11 agreement.
The described first detection converting unit is first change-over panel, described first change-over panel has four the 3rd RJ45 interfaces that are connected with described audio/video server unit, the described first high frequency bridge, described first expelling plate and described first dash receiver respectively, be connected with described first power board with one, and be the second switch signal output of described first power board power supply; Described second to detect converting unit be second change-over panel, and described second change-over panel has respectively three the 4th RJ45 interfaces (not marking) that are connected with described second dash receiver and described second expelling plate with the described second high frequency bridge.
In the present embodiment, described information acquisition unit is a camera, and described user terminal comprises microphone, receiver and display, and described mobile terminal is individual soldier's transmitter, and described commander's end is the command car receiver.
Described commander's end is connected with router, and described router is connected with at least one network terminal, and described router is connected with the 3rd high frequency bridge again, finishes the transmission of data, can be that wired connection also can be wireless connections with described bridge wherein.
Embodiment 5
Present embodiment 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 described commander is connected with router, described router is connected with the 3rd bridge again, finish the wireless transmission of data, described the 3rd bridge is connected with bridge access point (AP) again, described bridge access point is connected with a plurality of bridges again, and can finish 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, finish the transfer of data of inter-network bridge, when one of them bridge access point breaks down, can guarantee the normal transmission of data by another bridge access point, can be that wireless connections also can be wired connections with being connected of the described first bridge access point and the second bridge access point wherein.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to execution mode.For those of ordinary skill in the field, can also make other changes in different forms according to varying in size of equipment on the basis of the above description.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 (20)
1. wireless audio and video transmission system comprises:
The mobile terminal, commander's end;
Described 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 described audio/video server unit, is used for collection site information and converts signal to sending to described audio/video server unit;
Subscriber terminal unit is connected with described audio/video server unit, is used to receive the audio-video signal from described audio/video server unit, exports in the mode of analog signal;
The first high-frequency wireless signals transmission unit carries out the high-frequency wireless signals transmission by 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 by described Radio Link and extraneous low frequency transmission of wireless signals equipment;
First detects converting unit, respectively with described audio/video server unit, described first high-frequency wireless signals transmission unit and the described first low frequency wireless signal transmitting unit connect, described first detect that converting unit is finished and described audio/video server unit and described first high-frequency wireless signals transmission unit or the described first low frequency wireless signal transmitting unit between digital data transmission, and finish and described first high-frequency wireless signals transmission unit and the described first low frequency wireless signal transmitting unit between described digital signal transmission path switch;
Described 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 by described Radio Link and the described 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 by the described Radio Link and the first low frequency wireless signal transmitting unit;
Second detects converting unit, respectively with the described network terminal, described second high-frequency wireless signals transmission unit and the described second low frequency wireless signal transmitting unit connect, first detect that converting unit is finished and the described network terminal and described second high-frequency wireless signals transmission unit or the described second low frequency wireless signal transmitting unit between digital data transmission, and finish and described second high-frequency wireless signals transmission unit and the described second low frequency wireless signal transmitting unit between described digital signal transmission path switch;
Wherein, described digital signal transmission path is switched and is specially described first and detects converting unit and second and detect converting unit and respectively between the two transmission code stream is detected; When described transmission code stream is lower than preset value, described first detects converting unit sends first switching command to the described first low frequency wireless signal transmitting unit, thereby opens described first digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmitting unit; Correspondingly, described second detects converting unit sends second switching command to the described second high-frequency wireless signals transmission unit, thereby opens the digital signal transmission path that the described second low frequency wireless signal transmitting unit and described second detects converting unit; When described transmission code stream during more than or equal to described preset value, described first detects converting unit sends the 3rd switching command to the first low frequency wireless signal transmitting unit, thereby closes the described first described digital signal transmission path that detects between converting unit and the described first low frequency wireless signal transmitting unit; Correspondingly, described second detects converting unit sends the 4th switching command to the described second low frequency wireless signal transmitting unit, thereby closes the described second low frequency wireless signal transmitting unit and the described second described digital signal transmission path that detects between converting unit.
2. wireless audio and video transmission system according to claim 1, it is characterized in that: the described first high-frequency wireless signals transmission unit is that the first high frequency bridge and the described second high-frequency wireless signals transmission unit are the second high frequency bridge, described first detects converting unit comprises and is used to the first conversion subelement that is used to send described first switching command and described the 3rd switching command that detects first detection sub-unit of described transmission code stream and be attached thereto, and described two detect converting units comprises and be used to the second conversion subelement that is used to send second switching command and the 4th switching command that detects second detection sub-unit of described transmission code stream and be attached thereto.
3. wireless audio and video transmission system according to claim 2, it is characterized in that: the described first low frequency wireless signal transmitting unit comprises the first low frequency wireless signal transmission unit, and the described 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: described mobile terminal also comprises and converts the low frequency wireless signal to analog signal output, independently low frequency wireless signal receiving system; Described 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 described first low frequency wireless signal transmitting unit also comprises the first low frequency wireless signal receiving element, and the described 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: described wireless signal is wireless microwave signal.
7. wireless audio and video transmission system according to claim 6, it is characterized in that: the described 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 described 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 described first low frequency wireless signal transmitting unit is first expelling plate of 250MHZ-600MHZ for adopting Coded Orthogonal Frequency Division Multiplexing (COFDM) technology tranmitting frequency, with first power board that is connected with described first expelling plate, and first antenna that is connected with described first power board; The described second low frequency wireless signal receiving element comprises second dash receiver that receive frequency is identical with described first expelling plate and second antenna that is attached thereto.
9. wireless audio and video transmission system according to claim 8, it is characterized in that: described low frequency wireless signal receiving system is the data radio station receiver that first voice device connects, and described low frequency wireless signal transmitting device comprises second voice device and the data radio station transmitter that is connected with described second voice device.
10. wireless audio and video transmission system according to claim 8, it is characterized in that: the described first low frequency wireless signal receiving element for respectively with described first first dash receiver that to detect receive frequency that converting unit is connected with described first power board and the described second expelling plate tranmitting frequency be 250MHZ-600MHZ, the described second low frequency wireless signal transmission unit is to detect converting unit with described second antenna and described second respectively to be connected tranmitting frequency and the second identical expelling plate of the described first dash receiver tranmitting frequency.
11. wireless audio and video transmission system according to claim 9, it is characterized in that: the described first detection converting unit is first change-over panel, described first change-over panel has three the one RJ45 interfaces that are connected with described audio/video server unit, the described first high frequency bridge, described first transmitter respectively, be connected with described first power board with one, and be the first switching signal delivery outlet of described first power board power supply; Described second to detect converting unit be second change-over panel, and described second change-over panel has respectively two the 2nd RJ45 interfaces that are connected with described second dash receiver with the described second high frequency bridge.
12. wireless audio and video transmission system according to claim 10, it is characterized in that: the described first detection converting unit is first change-over panel, described first change-over panel has four the 3rd RJ45 interfaces that are connected with described audio/video server unit, the described first high frequency bridge, described first expelling plate and described first dash receiver respectively, be connected with described first power board with one, and be the second switch signal output of described first power board power supply; Described second to detect converting unit be second change-over panel, and described second change-over panel has respectively three the 4th RJ45 interfaces that are connected with described second dash receiver and described second expelling plate with the described second high frequency bridge.
13. wireless audio and video transmission system according to claim 9 is characterized in that: the described network terminal of described commander's end is connected with router, and described router is connected with the 3rd high frequency bridge again, finishes the transmission of data.
14. wireless audio and video transmission system according to claim 12 is characterized in that: the described network terminal of described commander's end is connected with router, and described router is connected with the 3rd high frequency bridge again, finishes 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 described bridge access point, finishes 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 described 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 described 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 described 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 described first low frequency wireless signal transmitting unit is 1W-2W.
20. wireless audio and video transmission system according to claim 15 is characterized in that: the power of the described first high-frequency wireless signals transmission unit is 0.1W, and the power of the described 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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