CN105025323B - Audio/video transmission system - Google Patents

Audio/video transmission system Download PDF

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Publication number
CN105025323B
CN105025323B CN201410470963.8A CN201410470963A CN105025323B CN 105025323 B CN105025323 B CN 105025323B CN 201410470963 A CN201410470963 A CN 201410470963A CN 105025323 B CN105025323 B CN 105025323B
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signal
module
audio
pair
conveyer
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CN105025323A (en
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朱弘棋
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Aten International Co Ltd
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Aten International Co Ltd
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Abstract

A kind of audio/video transmission system includes conveyer, transmission line and multiple receivers concatenated with one another.Conveyer is coupled to the first receiver by transmission line.Conveyer includes the first receiving module, modulating module and the first output module.Audio-visual input signal is tuned as moving signal corresponding to first pair of middle frequency difference of the first frequency range by modulating module, and reaches the first receiver by transmission line.First receiver includes the second receiving module, solution modulating module and the second output module.First pair of middle frequency difference is moved signal and exported to second receiver by the second receiving module.Solving modulating module has the first setting frequency range.If the first frequency range that first pair of middle frequency difference moves signal corresponds to the first setting frequency range, it is audio-visual input signal that first pair of middle frequency difference is moved signal demodulation by solution modulating module, and is exported by the second output module.

Description

Audio/video transmission system
Technical field
The present invention is related with audio-visual transmission, especially with regard to a kind of audio/video transmission system of simplified wiring.
Background technique
In general, if the function of the multiple HDMI signals of audio/video transmission system simultaneous transmission to be reached, audio/video transmission system In multiple conveyers and receiver between generally use the mode of radial wiring.For example, it is assumed that audio/video transmission system There are four conveyer and four receivers, then each conveyer is both needed to that four transmission lines is drawn to be coupled to four receivers respectively, Thus causes the wiring of entire audio/video transmission system that can become very many and diverse and be not easy to arrange.
The conveyer and receiver for especially being included in audio/video transmission system now may more and more application trends Under, this is once being routed many and diverse and being not easy the problem of arranging and seem even more serious and urgently to be resolved.
Therefore, the present invention proposes a kind of audio/video transmission system, to solve the above problem that prior art is suffered from.
Summary of the invention
A specific embodiment according to the present invention is a kind of audio/video transmission system.In this embodiment, audio/video transmission system Include a conveyer, a transmission line and multiple receivers.Multiple receiver concatenates together, and conveyer passes through transmission line and couples To the first receiver.Conveyer includes the first receiving module, the first modulating module and the first output module.First receiving module is used To receive the first audio-visual input signal.First modulating module couples the first receiving module, to by the first audio-visual input signal tune First pair of middle frequency difference for changing to correspond to the first frequency range moves signal.First output module couples the first modulating module, to export First pair of middle frequency difference moves signal.Transmission line couples the first output module, moves signal to transmit first pair of middle frequency difference.It is multiple to connect Receiving the first receiver in device includes the second receiving module, the first solution modulating module and the second output module.Second receiving module Coupled transmission lines are exported to receive the dynamic signal of first pair of middle frequency difference and first pair of middle frequency difference is moved signal to multiple receiver In second receiver.First solution the second receiving module of modulation module couples, the first solution modulating module have the first setting frequency range, First solution modulating module receives first pair of middle frequency difference from the second receiving module and moves signal, if first pair of middle frequency difference moves signal First frequency range corresponds to the first setting frequency range, and it is first audio-visual that first pair of middle frequency difference is moved signal demodulation by the first solution modulating module Input signal.Second output module coupling the first solution modulating module, to export the first audio-visual input signal.
In one embodiment, transmission line includes four pairs of twisted pairs, so that conveyer passes through first pair of multiple twin of transmission line Line transmits first pair of middle frequency difference and moves signal to the first receiver.
In one embodiment, conveyer also includes network signal receiving module, to receive network signal and transmission net Network signal is to the first output module, network signal is sent to the first receiver by transmission line.
In one embodiment, transmission line includes four pairs of twisted pairs, so that conveyer passes through second pair of multiple twin of transmission line Line and third transmit network signal to the first receiver to twisted pair.
In one embodiment, the first receiver also includes network signal output module, couples the second receiving module, to It receives network signal and exports to outside.
In one embodiment, conveyer also includes control module, is coupled to modulating module and the first output module, with hair Send control signal.
In one embodiment, transmission line includes four pairs of twisted pairs, so that conveyer passes through the 4th pair of multiple twin of transmission line Line transmission controls signal to the first receiver.
In one embodiment, the first receiver also includes signal transmission module, is coupled to the second receiving module, to incite somebody to action First pair of middle frequency difference moves signal and is sent to second receiver.
In one embodiment, the first receiver also includes control module, is coupled to signal transmission module and the first demodulation Become module, to send control signal.
In one embodiment, second receiver includes third receiving module, the second solution modulating module and third output module. Third receiving module couples the first receiver, moves signal to receive first pair of middle frequency difference.Second solution modulation module couples third Receiving module simultaneously has the second setting frequency range.It is dynamic that second solution modulating module receives first pair of middle frequency difference from third receiving module Signal.If the first frequency range that first pair of middle frequency difference moves signal corresponds to the second setting frequency range, the second solution modulating module is by first pair The differential signal demodulation of intermediate frequency is the first audio-visual input signal.Third output module coupling the second solution modulating module, to from the Two solution modulating modules receive the first audio-visual input signal and export the first audio-visual input signal.
In one embodiment, audio/video transmission system also includes User's Interface, is set to conveyer and/or the first reception Device, with so that user operates or sets.
It is according to another embodiment of the present invention also a kind of audio/video transmission system.In this embodiment, audio-visual transmission System includes multiple conveyers, a transmission line and multiple receivers.Together, multiple receiver concatenates multiple conveyer concatenation Together, and the first conveyer by transmission line is coupled to the first receiver.The first conveyer in multiple conveyer includes the One receiving module, the first modulating module and the first output module.First receiving module is to receive the first audio-visual input signal.The One modulating module couples the first receiving module, the first audio-visual input signal to be tuned as to first pair corresponding to the first frequency range Intermediate frequency differential wave.First output module couples the first modulating module, to export a pair of of synthesis intermediate frequency differential wave, wherein should Signal is moved to synthesis middle frequency difference and moves signal comprising second pair of middle frequency difference that first pair of middle frequency difference moves signal and corresponds to the second frequency range, And second pair of middle frequency difference moves second conveyer of the signal in multiple conveyer.Transmission line couples the first output module, uses Signal is moved to transmit this to synthesis middle frequency difference.The first receiver in multiple receiver includes the second receiving module, the first solution Modulating module and the second output module.Second receiving module coupled transmission lines move signal simultaneously to synthesis middle frequency difference to receive this This is moved into signal to synthesis middle frequency difference and exports the second receiver into multiple receiver.First solution modulation module couples second Receiving module, the first solution modulating module have the first setting frequency range, and the first solution modulating module is received from the second receiving module This moves signal to synthesis middle frequency difference, if this moves the first frequency range pair that first pair of middle frequency difference in signal moves signal to synthesis middle frequency difference Should be in the first setting frequency range, it is the first audio-visual input signal that first pair of middle frequency difference is moved signal demodulation by the first solution modulating module. Second output module coupling the first solution modulating module, to export the first audio-visual input signal.
Still another embodiment according to the present invention is also a kind of audio/video transmission system.In this embodiment, audio-visual transmission System includes multiple conveyers, a transmission line and a receiver.Multiple conveyer concatenates together, and the first conveyer passes through biography Defeated line is coupled to receiver.The first conveyer in multiple conveyer includes the first receiving module, the first modulating module and the One output module.First receiving module is to receive the first audio-visual input signal.First modulating module couples the first receiving module, The first audio-visual input signal to be tuned as to move signal corresponding to first pair of middle frequency difference of the first frequency range.First output module coupling The first modulating module is connect, to export a pair of of synthesis intermediate frequency differential wave, it includes first that wherein this, which moves signal to synthesis middle frequency difference, Signal is moved to second pair of middle frequency difference that middle frequency difference moves signal and corresponds to the second frequency range, and the dynamic signal of second pair of middle frequency difference comes from and is somebody's turn to do The second conveyer in multiple conveyers.Transmission line couples the first output module, moves signal to synthesis middle frequency difference to transmit this. Receiver includes the second receiving module, the first solution modulating module and the second output module.Second receiving module coupled transmission lines are used Signal is moved to receive this to synthesis middle frequency difference.First solution the second receiving module of modulation module couples, the first solution modulating module have First setting frequency range, first solution modulating module receive from the second receiving module this to synthesis middle frequency difference move signal, if this is right It synthesizes first pair of middle frequency difference in intermediate frequency differential wave and moves the first frequency range of signal corresponding to the first setting frequency range, the first solution modulation It is the first audio-visual input signal that first pair of middle frequency difference is moved signal demodulation by module.Second output module coupling the first solution modulation mould Block, to export the first audio-visual input signal.
Compared to prior art, audio/video transmission system according to the present invention is had the advantage that
(1) only it can need to extend simultaneously audio-visual (HDMI) signal and network signal by the transmission line of a such as CAT5, Prior art can be effectively improved wiring complexity caused by plurality of transmission lines need to be set and be not easy the shortcomings that arranging.
(2) it is applicable to the audio/video transmission system with different types, either a conveyer is to multiple receivers Video-audio signal distributor (Splitter) pattern or multiple conveyers are to matrix (Matrix) patterns of multiple receivers, also Or multiple conveyers can be applicable in video-audio signal switch (Switch) pattern of a receiver.
(3) all conveyers can be concatenated with one another and the HDMI signal that will be respectively received be sent to network signal it is specific HDMI signal and network signal are exported to specific receiver by a CAT5 transmission line, are owned by conveyer, specific conveyer Receiver is also all concatenated with one another, and receives the HDMI signal and network signal that this CAT5 transmission line is transmitted by specific receiver Afterwards, then by each HDMI signal and network signal it is respectively sent to corresponding receiver.
It can be obtained further by detailed description of the invention below and institute's accompanying drawings about the advantages and spirit of the present invention Solution.
Detailed description of the invention
Fig. 1 is the schematic diagram for being painted the audio/video transmission system of a specific embodiment according to the present invention.
Fig. 2 is the electrical block diagram for the conveyer TX being painted in Fig. 1.
Fig. 3 is the electrical block diagram of the first receiver RX1 and second receiver RX2 that are painted in Fig. 1.
Fig. 4 is the schematic diagram for being painted audio/video transmission system according to another embodiment of the present invention.
Fig. 5 is the first conveyer TX1 being painted in Fig. 4 and Fig. 6 and the electrical block diagram of the second conveyer TX2.
Fig. 6 is the schematic diagram for being painted the audio/video transmission system of still another embodiment according to the present invention.
Fig. 7 is the electrical block diagram for the receiver RX being painted in Fig. 6.
[symbol description]
1,2,3: audio/video transmission system
TX, TX1~TX4: conveyer
RX, RX1~RX4: receiver
L: transmission line
L1~L4: four pairs of twisted pairs
10,40,50: video-audio signal receiving module
12,42,52: modulating module
14,24,34,44,54,64: output module
16,26,36,46,56,66: control module
17,47,57: network signal receiving module
18,28,38,48,58,68: signal transmission module
19,29,39,49,59,69: hub module
20,30,60: receiving module
22,32,62: solution modulating module
27,37,67: network signal output module
VS, VS1, VS2: audio-visual input signal
NS, NS1, NS2: network signal
IF ±, IF1 ±, IF2 ±: a pair of of intermediate frequency differential wave
D ±, D1 ±, D2 ±: a pair of control differential wave
N1 ±, N2 ±, N11 ±, N21 ±, N12 ±, N22 ±: a pair of of network differential wave
Specific embodiment
A preferred embodiment according to the present invention is a kind of audio/video transmission system.In this embodiment, audio-visual transmission System 1 is video-audio signal distributor (Splitter) pattern with a conveyer to multiple receivers.Please refer to Fig. 1, Fig. 1 It is the schematic diagram for the audio/video transmission system being painted in this embodiment.
As shown in Figure 1, audio/video transmission system 1 includes a conveyer TX, single transmission lines L and multiple receiver RX1 To RX4.In practical application, transmission line L may, for example, be the CAT5 transmission line comprising four pairs of twisted pairs, to be transmitted to More four pairs of differential waves, but not limited to this.In addition, the quantity of the receiver in audio/video transmission system 1 also not with this Four are limited, and can adjust according to actual demand.
Conveyer TX is coupled to the first receiver RX1 by transmission line L;First receiver RX1, second receiver RX2, It is concatenated with one another that three receiver RX3 and the 4th receiver RX4 sequentially pass through transmission line, that is, the first receiver RX1 coupling second connects Device RX2 is received, second receiver RX2 couples third receiver RX3, and third receiver RX3 couples the 4th receiver RX4.In reality In, those receivers RX1 to RX4 to the transmission line that mutually concatenates can be one include four pairs of twisted pairs CAT5 Transmission line, to be transmitted to more four pairs of differential waves, but not limited to this.
Then, referring to figure 2., Fig. 2 is the electrical block diagram for the conveyer TX being painted in Fig. 1.As shown in Fig. 2, passing Device TX is sent to include at least video-audio signal receiving module 10, modulating module 12, output module 14;It again may include control module 16, net Network signal receiving module 17, signal transmission module 18 and hub module 19.Wherein, video-audio signal receiving module 10 couples modulation mould Block 12;Modulating module 12 couples output module 14;Control module 16 couples modulating module 12, output module 14 and signal and transmits mould Block 18;Network signal receiving module 17 couples hub module 19;Hub module 19 couples output module 14 and signal transmission module 18。
In fact, video-audio signal receiving module 10 can be HDMI video-audio signal receiver, to receive digital audio-video letter Number;Network signal receiving module 17 may include RJ45 connector, be not limited to receive Ethernet signal, but.
When video-audio signal receiving module 10 receives audio-visual input signal VS, modulating module 12 can be by audio-visual input signal VS is tuned as a pair of of intermediate frequency differential wave IF ± corresponding to the first frequency range and is sent to output module 14, then by output module 14 This is moved into a pair of of twisted pair (such as first pair twisted pair L1) of the signal IF ± output into transmission line L to middle frequency difference.In reality In, audio-visual input signal VS received by video-audio signal receiving module 10 be can be by coupling and corresponding to conveyer TX An audio-visual source device (such as DVD player) provided;Modulating module 12 is DVBT modulating module, and it is more that orthogonal frequency division can be used It work (Orthogonal Frequency-Division Multiplexing, OFDM) and H.264 encodes to audio-visual input signal Modulation and compression are carried out, but not limited to this.In addition, control module 16 can provide the setting of 12 frequency range of modulating module.
Since transmission line L includes four couples of twisted pair L1 to L4 in total, in addition to first pair of middle frequency difference of transmission moves signal IF ± first couple of twisted pair L1 except, can be used to transmission differential signal there are also second couple of twisted pair L2 to the 4th couples of twisted pair L4.
In this embodiment, when network signal receiving module 17 receives network signal NS, network signal receiving module Network signal NS is sent to output module 14 via hub module 19 by 17, then passes through the in transmission line L by output module 14 Two couples of twisted pair L2 and third to twisted pair L3 export two couples of network differential waves N1 ± and N2 ±.
In addition, control module 16 can issue control signal D ± to output module 14, and transmission line is passed through by output module 14 The 4th couple of twisted pair L4 in L export a pair of control differential wave D ±.This is to control differential wave D ± may be, for example, DVBT frequency Section setting, volume control or other any control signals.
Then, referring to figure 3., Fig. 3 is the circuit structure of the first receiver RX1 and second receiver RX2 that are painted in Fig. 1 Schematic diagram.As shown in figure 3, the first receiver RX1 includes receiving module 20, solution modulating module 22, output module 24, control module 26, network signal output module 27, signal transmission module 28 and hub module 29.Wherein, the coupling of receiving module 20 solution modulation mould Block 22 and signal transmission module 28;It solves modulating module 22 and couples output module 24;Control module 26 coupling solution modulating module 22 and Signal transmission module 28;Network signal output module 27 couples hub module 29;Signal transmission module 28 is coupled to hub module 29, receiving module 20, solution modulating module 22 and control module 26.The signal transmission module 28 of first receiver RX1 is by such as The transmission line of CAT-5 is coupled to the receiving module 30 of second receiver RX2.
The internal circuit configuration of second receiver RX2 is identical as the first receiver RX1, includes receiving module 30, solution modulation Module 32, output module 34, control module 36, network signal output module 37, signal transmission module 38 and hub module 39.Its In, the coupling of receiving module 30 solution modulating module 32 and signal transmission module 38;It solves modulating module 32 and couples output module 34;Control The coupling of module 36 solution modulating module 32 and signal transmission module 38;Network signal output module 37 couples hub module 39;Signal Transmission module 38 is coupled to receiving module 30, solution modulating module 32, control module 36 and hub module 39.
The receiving module 20 of the first receiver RX1 of coupled transmission lines L can be respectively received first pair of multiple twin of transmission line L A pair of of intermediate frequency differential wave IF that line L1 to the 4th couples of twisted pair L4 is transmitted ±, two couples of network differential wave N1 ± and N2 ± and A pair of control differential wave D ±.
When receiving module 20 receive this to control differential wave D ± when, receiving module 20 can be by this to controlling differential letter Number D ± be sent to solution modulating module 22 and signal transmission module 28.It is passed when signal transmission module 28 receives receiving module 20 Bring this to control differential wave D ± when, signal transmission module 28 can be by this to control differential wave D ± be sent to second The receiving module 30 of receiver RX2.Modulating module 22 is solved to control differential wave D ± can make by this and carries out corresponding running, Such as the setting of demodulation frequency conversion section.In addition, also directly solution modulating module can be carried out by the control module 26 of the first receiver RX1 22 setting.
When receiving module 20 receive this to middle frequency difference move signal IF ± when, receiving module 20 can be by the letter dynamic to middle frequency difference Number IF ± be respectively sent to solution modulating module 22 and signal transmission module 28.When signal transmission module 28 receives receiving module 20 Sent this to middle frequency difference move signal IF ± when, this can be moved signal IF ± transmission to middle frequency difference by signal transmission module 28 To the receiving module 30 of second receiver RX2.Solving modulating module 22 has the first setting frequency range.When solution modulating module 22 receives Receiving module 20 sent this to middle frequency difference move signal IF ± when, if this to middle frequency difference move signal IF ± the first frequency range Corresponding to the first setting frequency range, this can be moved signal IF ± solution to middle frequency difference and be tuned as audio-visual input signal by solution modulating module 22 VS, and audio-visual input signal VS is exported by output module 24, such as audio-visual input signal VS is exported to coupling and correspond to the A video and audio output device (such as TV or monitor) of one receiver RX1, but not limited to this.
When receiving module 20 receive two couples of network differential wave N1 ± and N2 ± when, receiving module 20 can pass through line concentration Module 29 is by two couples of network differential waves N1 ± and N2 ± be sent to network signal output module 27 and signal transmission module 28. When signal transmission module 28 receive two couples of network differential wave N1 ± that receiving module 20 is sent and N2 ± when, letter Number transmission module 28 can be by the receiving module 30 of two couples of network differential waves N1 ± and N2 ± be sent to second receiver RX2. When network signal output module 27 receive two couples of network differential waves N1 ± and N2 that receiving module 20 sent ± When, if two couples of network differential waves N1 ± and N2 ± corresponding to the first receiver RX1, network signal output module 27 can export Two couples of network differential waves N1 ± and N2 ±, such as by two couples of network differential wave N1 ± and N2 ± output to a network, But not limited to this.
When the signal transmission module 28 that the receiving module 30 of second receiver RX2 receives the first receiver RX1 is transmitted Come over this to middle frequency difference move signal IF ±, two couples of network differential wave N1 ± and N2 ± and this to control differential wave D ± When, receiving module 30 can by this to control differential wave D ± be respectively sent to solution modulating module 32 and signal transmission module 38, with And this is moved into signal IF ± be respectively sent to solution modulating module 32 and signal transmission module 38 to middle frequency difference, and pass through hub module 39 by two couples of network differential waves N1 ± and N2 ± be sent to network signal output module 37 and signal transmission module 38.
Receive that receiving module 30 sent when signal transmission module 38 this to control differential wave D ± when, letter Number transmission module 38 can be by this to control differential wave D ± be sent to third receiver RX3.By this to control differential wave D ± solution modulating module 32 can be made to carry out corresponding running, such as the setting of demodulation frequency conversion section.In addition, also can directly be connect by second The control module 36 for receiving device RX2 carries out the setting of solution modulating module 32.
Receive that receiving module 30 sent when signal transmission module 38 this to middle frequency difference move signal IF ± when, letter This can be moved signal IF ± be sent to third receiver RX3 to middle frequency difference by number transmission module 38.Solving modulating module 32 has setting Frequency range.When solve that modulating module 32 receives that receiving module 30 sent this to middle frequency difference move signal IF ± when, if this is right Intermediate frequency differential wave IF ± the first frequency range correspond to the setting frequency range of solution modulating module 32, solution modulating module 32 can be by the centering Frequency differential wave IF ± solution is tuned as audio-visual input signal VS, and exports audio-visual input signal VS by output module 34, such as will Audio-visual input signal VS is exported to coupling and corresponding to a video and audio output device of second receiver RX2 (such as TV or monitoring Device), but not limited to this.
When signal transmission module 38 receive two couples of network differential wave N1 ± that receiving module 30 is sent and N2 ± when, signal transmission module 38 can be by two couples of network differential waves N1 ± and N2 ± be sent to third receiver RX3.Work as net Network signal output module 37 receive two couples of network differential wave N1 ± that receiving module 30 is sent and N2 ± when, net Network signal output module 37 can export two couples of network differential waves N1 ± and N2 ±.
In practical application, audio/video transmission system 1 can also include User's Interface, which is coupled to control mould Block.The visual actual demand of User's Interface is only arranged at conveyer TX or the first receiver RX1, even any receiver, or It is set to conveyer TX and receiver simultaneously, so that user carries out the operation of channel selection, frequency range is set or other control signals It sends and relevant setting.User's Interface can be button pattern or remote controler pattern, have no specific limitation.
As for by second receiver RX2 by this to middle frequency difference move signal IF ±, two couples of network differential waves N1 ± and N2 ± and this to control differential wave D ± be transmitted to the situation of third receiver RX3 and by third receiver RX3 by this to intermediate frequency Differential wave IF ±, two couples of network differential wave N1 ± and N2 ± and this to control differential wave D ± be transmitted to the 4th reception The situation of device RX4, it is also consistent with previous embodiment, therefore do not repeated separately in this.
In conclusion in the audio/video transmission system 1 with video-audio signal distributor (Splitter) pattern, conveyer TX It only needs that the output of HDMI digital audio-video signal device can be received up to simultaneously by a CAT5 transmission line, and is received by first Device RX1 is concatenated with one another to the 4th receiver RX4, therefore can be by each HDMI digital audio-video received by the first receiver RX1 Signal is sent to corresponding receiver, and can be effectively improved prior art need to be arranged wiring complexity caused by plurality of transmission lines not The shortcomings that easily arranging.In addition, audio/video transmission system 1 also only needs a CAT5 transmission line to can reach while transmitting digital audio-video letter Number, network signal and control signal the effect of.
Another preferred embodiment according to the present invention is also a kind of audio/video transmission system.It is audio-visual in this embodiment Transmission system 2 has multiple conveyers to matrix (Matrix) pattern of multiple receivers.Referring to figure 4., Fig. 4 is painted this implementation The schematic diagram of audio/video transmission system in example.
As shown in figure 4, audio/video transmission system 2 includes multiple conveyer TX1 to TX4, single transmission lines L and multiple receptions Device RX1 to RX4.In practical application, transmission line L may, for example, be the CAT5 transmission line comprising four pairs of twisted pairs, to More four pairs of differential waves are transmitted to, but not limited to this.In addition, the number of conveyer and receiver in audio/video transmission system 2 Amount is not also limited with this four, can be adjusted according to actual demand.
The first conveyer TX1, the second conveyer TX2, third conveyer TX3 and the 4th transmission in audio/video transmission system 2 It is sequentially concatenated with one another that device TX4 passes through such as CAT5 transmission line, that is, the first conveyer TX1 couples the second conveyer TX2, the second transmission Device TX2 couples third conveyer TX3, and third conveyer TX3 couples the 4th conveyer TX4;First receiver RX1, second receive Device RX2, third receiver RX3 and the 4th receiver RX4 are sequentially concatenated with one another by such as CAT5 transmission line, that is, the first receiver RX1 couples second receiver RX2, and second receiver RX2 couples third receiver RX3, and third receiver RX3 coupling the 4th receives Device RX4.First conveyer TX1 is coupled to the first receiver RX1 by such as CAT5 transmission line L.
Then, referring to figure 5., Fig. 5 is the first conveyer TX1 being painted in Fig. 4 and the circuit structure of the second conveyer TX2 Schematic diagram.As shown in figure 5, the first conveyer TX1 includes video-audio signal receiving module 40, modulating module 42, output module 44, control Molding block 46, network signal receiving module 47, signal transmission module 48 and hub module 49.Wherein, video-audio signal receiving module 40 coupling modulating modules 42;Modulating module 42 couples output module 44;Control module 46 couples modulating module 42, output module 44 And signal transmission module 48;Network signal receiving module 47 couples hub module 49;Hub module 49 couple output module 44 and Signal transmission module 48.
The circuit structure of second conveyer TX2 is identical as the first conveyer TX1, comprising video-audio signal receiving module 50, adjusts Become module 52, output module 54, control module 56, network signal receiving module 57, signal transmission module 58 and hub module 59. Wherein, video-audio signal receiving module 50 couples modulating module 52;Modulating module 52 couples output module 54;Control module 56 couples Modulating module 52, output module 54 and signal transmission module 58;Network signal receiving module 57 couples hub module 59;Line concentration mould Block 59 couples output module 54 and signal transmission module 58.
Video-audio signal receiving module 40 and 50 may, for example, be HDMI video-audio signal receiver, to receive digital audio-video letter Number;Network signal receiving module 47 and 57 may include RJ45 connector, be not limited to receive Ethernet signal, but.
For the second conveyer TX2, when video-audio signal receiving module 50 receives audio-visual input signal VS2, modulation Audio-visual input signal VS2 can be tuned as a pair the second intermediate frequency differential wave corresponding to the second frequency range, and and signal by module 52 It is differential that the differential signal node of intermediate frequency for a pair of of synthesis from third conveyer TX3 that transmission module 58 is transmitted synthesizes a pair of of intermediate frequency Signal IF2 ± after be sent to output module 54, and the first conveyer TX1 is sent to by a pair of of twisted pair in CAT5 transmission line L Signal transmission module 48.
It should be noted that intermediate frequency differential wave of this from third conveyer TX3 to synthesis includes to correspond to third to pass Send the third frequency range of device TX3 a pair of of third intermediate frequency differential wave and the 4th frequency range corresponding to the 4th conveyer TX4 one To the 4th intermediate frequency differential wave, since the bandwidth range that CAT5 transmission line L can transmit is quite big, it is however generally that at least transmittable 15 A different channel with 6M bandwidth, therefore, even if by correspond to the second frequency range this to the second intermediate frequency differential wave, correspond to Third frequency range this to third intermediate frequency differential wave and corresponding to the 4th frequency range this to the 4th intermediate frequency differential signal node synthesis one To middle frequency difference move signal IF2 ±, when CAT5 transmission line L transmit this to middle frequency difference move signal IF2 ± when, corresponding to different frequency range This to the second intermediate frequency differential wave, this to third intermediate frequency differential wave and this can't mutually be concerned with to the 4th intermediate frequency differential wave It disturbs.
In addition, also can will to receive the network from third conveyer TX3 and the 4th conveyer TX4 differential for output module 54 Signal N12 ± and N22 ± and control differential wave D2 ±, be respectively sent to by another three pairs of twisted pairs in CAT5 transmission line L The signal transmission module 48 of first conveyer TX1.Wherein hub module (HUB) 49 will reach an agreement on according to Ethernet and carry out those nets The processing of network signal.
For the first conveyer TX1, when video-audio signal receiving module 40 receives audio-visual input signal VS1, modulation Module 42 can by audio-visual input signal VS1 be tuned as corresponding to the first frequency range a pair the first intermediate frequency differential wave IF1 ±, and with This from the second conveyer TX2 that signal transmission module 48 is transmitted moves signal IF2 ± combination intermediate frequency in a pair to middle frequency difference Differential wave IF ± after be sent to output module 44, then this is moved into signal IF ± output to transmitting to middle frequency difference by output module 44 A pair of of twisted pair (such as first couple of twisted pair L1) in line L, to be sent to the first receiver RX1.
It should be noted that since the bandwidth range that CAT5 transmission line L can transmit is quite big, it is however generally that at least transmittable 15 A different channel with 6M bandwidth, therefore, even if this is moved signal IF2 ± (comprising corresponding to the second frequency range to middle frequency difference This is somebody's turn to do to the second intermediate frequency differential wave, corresponding to this of third frequency range to third intermediate frequency differential wave and corresponding to the 4th frequency range To the 4th intermediate frequency differential wave) with correspond to the first frequency range this to the first intermediate frequency differential wave IF1 ± be combined into this to intermediate frequency Differential wave IF ±, when transmission line L transmit this to middle frequency difference move signal IF ± when, correspond respectively to different frequency range this to first Intermediate frequency differential wave, this to the second intermediate frequency differential wave, this to third intermediate frequency differential wave and this to the 4th intermediate frequency differential wave It can't interfere with each other.
Similarly, output module 44 can will also receive network differential wave N1 ± and N2 ± and control from other conveyers Differential wave D ±, and the first receiver RX1 is sent to by another three couples of twisted pair L2 to L4 in transmission line L.
It can transmit 15 different channels with 6M bandwidth by the above-mentioned means, assuming transmission line L at least, then audio-visual transmission System 2 even may include 15 conveyers concatenated with one another and 15 receivers concatenated with one another.
In addition, about the first receiver RX1 of audio/video transmission system 2 and the circuit structure of second receiver RX2, due to it It is consistent with the circuit structure of the first receiver RX1 of audio/video transmission system 1 depicted in Fig. 3 and second receiver RX2, difference Be only that in audio/video transmission system 2 this to middle frequency difference move signal IF ± include correspond respectively to different frequency range this to first Intermediate frequency differential wave, this to the second intermediate frequency differential wave, this to third intermediate frequency differential wave and this to the 4th intermediate frequency differential wave, And in audio/video transmission system 1 this to middle frequency difference move signal IF ± only comprising corresponding to the first frequency range this is differential to the first intermediate frequency Signal, therefore referring to figure 3. and its related narration, it is not repeated separately in this.
For example, it is assumed that the display that user desirably corresponds to second receiver RX2 can be played corresponding to second Digital audio-video signal VS2 provided by the DVD player of conveyer TX2, user can be by being set to any conveyer or connecing The User's Interface for receiving device is set, and so that the solution modulating module 32 of second receiver RX2 is set bandwidth and is corresponded to second The frequency range for the intermediate frequency differential wave that the modulating module 52 of conveyer TX2 exports, due to 52 meeting of modulating module of the second conveyer TX2 Audio-visual input signal VS2 is tuned as a pair the second intermediate frequency differential wave corresponding to the second frequency range, and is contained in the centering Frequency differential wave IF ± in this first conveyer TX1 can be first sent to the second intermediate frequency differential wave after, then pass through transmission line L It is sent to the first receiver RX1, and is orderly sent to second receiver RX2 to the 4th receiver RX4.
As shown in figure 3, when the solution modulating module 32 of second receiver RX2 receives this that receiving module 30 sent To middle frequency difference move signal IF ± when, due to this to middle frequency difference move signal IF ± in this to the second of the second intermediate frequency differential wave the frequency Section correspond to solution modulating module 32 the second setting frequency range, solution modulating module 32 can by this to middle frequency difference move signal IF ± in should It is audio-visual input signal VS2 to the differential signal demodulation of the second intermediate frequency, and is exported audio-visual input signal VS2 by output module 34 It is played out to the display corresponding to second receiver RX2.Therefore, the solution modulating module of those receivers can correspond to setting institute Need frequency range, by this to middle frequency difference move signal IF ± in the corresponding differential signal demodulation of intermediate frequency be audio-visual input signal, into And export corresponding audio-visual input signal, relatively, this to middle frequency difference move signal IF ± in other non-solution modulations with receiver The intermediate frequency differential wave that module setting frequency range is consistent then can persistently be transferred to next receiver, until the solution with a certain receiver It just will do it solution when modulating module setting frequency range is consistent and be tuned as audio-visual input signal.
In conclusion the present invention has in the audio/video transmission system 2 of matrix (Matrix) pattern first by digital audio-video signal It is tuned as intermediate frequency differential wave, and concatenated with one another to the 4th conveyer TX4 by the first conveyer TX1, the first receiver RX1 It is concatenated with one another to the 4th receiver RX4, therefore can be by each number received by the first conveyer TX1 to the 4th conveyer TX4 Word video-audio signal is sent to the first conveyer TX1, and the first conveyer TX1 is only needed can be simultaneously each by a CAT5 transmission line Conveyer received digital audio-video signal carry out the intermediate frequency differential wave after modulation and export to the first receiver RX1, then by the One receiver RX1 is sent to all receivers, after by the solution modulating module of each receiver by corresponding intermediate frequency differential wave It is exported after being reduced to digital audio-video signal, therefore can be effectively improved prior art need to be arranged the complexity of wiring caused by plurality of transmission lines It is not easy the shortcomings that arranging.
Another preferred embodiment according to the present invention is also a kind of audio/video transmission system.It is audio-visual in this embodiment Transmission system 3 has multiple conveyers to video-audio signal switch (Switch) pattern of single a receiver, which can The audio-visual source of the conveyer in those conveyers is selected to export.Please refer to Fig. 6, Fig. 6 be painted it is audio-visual in this embodiment The schematic diagram of Transmission system.
As shown in fig. 6, audio/video transmission system 3 includes that multiple conveyer TX1 to TX4, single transmission lines L and single connect Receive device RX.In practical application, transmission line L may, for example, be the CAT5 transmission line comprising four pairs of twisted pairs, to transmit At most four pairs of differential wave, but not limited to this.In addition, the quantity of the conveyer in audio/video transmission system 3 is not also with this example Four be limited, can be adjusted according to actual demand.
The first conveyer TX1, the second conveyer TX2, third conveyer TX3 and the 4th transmission in audio/video transmission system 3 It is sequentially concatenated with one another that device TX4 passes through such as CAT5 transmission line, that is, the first conveyer TX1 couples the second conveyer TX2, the second transmission Device TX2 couples third conveyer TX3, and third conveyer TX3 couples the 4th conveyer TX4.First conveyer TX1 passes through such as CAT5 Transmission line L is coupled to receiver RX.
Electrical block diagram about the first conveyer TX1 and the second conveyer TX2 in audio/video transmission system 3 is also asked Referring to Fig. 5.As shown in figure 5, the first conveyer TX1 include video-audio signal receiving module 40, modulating module 42, output module 44, Control module 46, network signal receiving module 47, signal transmission module 48 and hub module 49.Wherein, video-audio signal receives mould Block 40 couples modulating module 42;Modulating module 42 couples output module 44;Control module 46 couples modulating module 42, output module 44 and signal transmission module 48;Network signal receiving module 47 couples hub module 49;Hub module 49 couples output module 44 And signal transmission module 48.
The circuit structure of second conveyer TX2 is identical as the first conveyer TX1, comprising video-audio signal receiving module 50, adjusts Become module 52, output module 54, control module 56, network signal receiving module 57, signal transmission module 58 and hub module 59. Wherein, video-audio signal receiving module 50 couples modulating module 52;Modulating module 52 couples output module 54;Control module 56 couples Modulating module 52, output module 54 and signal transmission module 58;Network signal receiving module 57 couples hub module 59;Line concentration mould Block 59 couples output module 54 and signal transmission module 58.
As in the prior embodiments, since the transmittable bandwidth range of CAT5 transmission line L is quite big, it is however generally that at least may be used 15 different channels with 6M bandwidth of transmission, therefore, even if the output module 44 of the first conveyer TX1 is exported to transmission line L This to middle frequency difference move signal IF ± by correspond respectively to different frequency range four pairs of middle frequency differences move signal be combined into, work as transmission line When L transmits this and moves signal IF ± to receiver RX to middle frequency difference, this four pairs of middle frequency differences move signal and can't interfere with each other.
Similarly, output module 44 can will also receive network differential wave N1 ± and N2 ± and control from other conveyers Differential wave D ±, and receiver RX is sent to by another three couples of twisted pair L2 to L4 in transmission line L.
It can transmit 15 different channels with 6M bandwidth by the above-mentioned means, assuming transmission line L at least, then audio-visual transmission System 3 may include even 15 conveyers concatenated with one another, and but not limited to this.
Then, Fig. 7 is please referred to, Fig. 7 is the electrical block diagram for the receiver RX being painted in Fig. 6.As shown in fig. 7, connecing It receives device RX and includes at least receiving module 60, solution modulating module 62, output module 64;It again may include control module 66, network signal Output module 67, signal transmission module 68 and hub module 69.Wherein, the coupling of receiving module 60 solution modulating module 62;Solve modulation Module 62 couples output module 64;The coupling solution modulating module 62 of control module 66;Network signal output module 67 couples line concentration mould Block 69;Signal transmission module 68 is coupled to hub module 69, receiving module 60, solution modulating module 62 and control module 66.
The receiving module 60 of the receiver RX of coupled transmission lines L can receive first couple of twisted pair L1 to of transmission line L A pair of of intermediate frequency differential wave IF that four couples of twisted pair L4 are transmitted ±, two couples of network differential wave N1 ± and N2 ± and a pair of control Differential wave D ±.
When receiving module 60 receive this to control differential wave D ± when, receiving module 60 can be by this to controlling differential letter Number D ± be sent to solution modulating module 62.Modulating module 62 is solved to control differential wave D ± can make by this and carries out corresponding fortune Make, such as the setting of demodulation frequency conversion section, but not limited to this.In addition, also can directly by the control module 66 of receiver RX into The setting of row solution modulating module 62.
When receiving module 60 receive this to middle frequency difference move signal IF ± when, receiving module 60 can be by the letter dynamic to middle frequency difference Number IF ± be sent to solution modulating module 62.Solving modulating module 62 has specific settings frequency range.Since this moves signal IF to middle frequency difference ± by correspond respectively to four different frequency ranges (the first frequency range to the 4th frequency range) four pairs of middle frequency differences move signal (this is to the first intermediate frequency Differential wave to this to the 4th intermediate frequency differential wave) be combined into, therefore, when to receive this dynamic to middle frequency difference for solution modulating module 62 Signal IF ± when, for example, if this to middle frequency difference move signal IF ± in first frequency range to the first intermediate frequency differential wave Corresponding to the specific settings frequency range of solution modulating module 62, then solving modulating module 62 can be by this to the differential signal demodulation of the first intermediate frequency For audio-visual input signal VS1, and audio-visual input signal VS1 is exported by output module 64, such as audio-visual input signal VS1 is exported To the video and audio output device (such as TV or monitor) for coupling and corresponding to receiver RX, but not limited to this.
Similarly, if this to middle frequency difference move signal IF ± in second frequency range to the second intermediate frequency differential wave correspond to solution The specific settings frequency range of modulating module 62, then solving modulating module 62 can be audio-visual defeated to the differential signal demodulation of the second intermediate frequency by this Enter signal VS2, and audio-visual input signal VS2 is exported by output module 64.The rest may be inferred for remaining.
When receiving module 60 receive two couples of network differential wave N1 ± and N2 ± when, receiving module 60 can pass through line concentration Module 69 is by two couples of network differential waves N1 ± and N2 ± be sent to network signal output module 67, network signal output module 67 can be by two couples of network differential wave N1 ± and N2 ± output to a network.
In practical application, audio/video transmission system 3 can also include User's Interface, which is coupled to control mould Block.The visual actual demand of User's Interface is only arranged at receiver RX or the first conveyer TX1, even any conveyer, or It is set to receiver RX and conveyer simultaneously, so that user carries out the operation of channel selection, frequency range is set or other control signals It sends and relevant setting.User's Interface can be button pattern or remote controler pattern, have no specific limitation.
In conclusion in the audio/video transmission system 3 with video-audio signal switch (Switch) pattern, due to the first biography Send device TX1 concatenated with one another to the 4th conveyer TX4, the first conveyer TX1 is only needed can be simultaneously by a CAT5 transmission line HDMI digital audio-video signal from different audio-visual sources is exported to receiver RX, can be effectively improved prior art need to be arranged it is more Wiring complexity caused by transmission lines is not easy the shortcomings that arranging, and user can pass through the solution modulation mould of change receiver RX The mode of the frequency range of the modulating module of the specific settings frequency range or each conveyer of block 62 switches the output in different audio-visual sources.This Outside, audio/video transmission system 3 also only needs a CAT5 transmission line to can reach while transmitting digital audio-video signal, network signal and control The effect of signal processed.
Compared to prior art, audio/video transmission system according to the present invention is had the advantage that
(1) it is applicable to the audio/video transmission system with different types, either a conveyer is to multiple receivers Video-audio signal distributor (Splitter) pattern or multiple conveyers are to matrix (Matrix) patterns of multiple receivers, also Or multiple conveyers need to only pass through a CAT5 transmission line to audio-visual switch (Switch) pattern of a receiver Transmitting audio-video signal (even transmitting network signal and control signal simultaneously), can be effectively improved prior art need to be arranged a plurality of transmission Wiring complexity caused by line is not easy the shortcomings that arranging.In addition it is noted that traditionally, multimedia video signal generally comprises There is high-frequency video signal, and because high-frequency signal is easier to decay in transmission, there is high-frequency multimedia shadow Sound signal (such as HDMI or DVI signal) often beyond 5 class transmission lines (CAT5 line) transfers loads bandwidth (about 100MH), because This is to be difficult to carry out long distance transmission by 5 class transmission lines if multimedia video signal is untreated.However, Multimedia video signal is converted into the differential wave that frequency is less than or equal to 30MHz, example first with modulating module through the invention For example intermediate frequency differential wave is applicable to the transmission line of 5 classes to transmit.
(2) all conveyers are concatenated with one another and the digital audio-video modulating signal that will be respectively received is intermediate frequency differential wave After be sent to a specific conveyer, specific conveyer is exported intermediate frequency differential wave by a CAT5 transmission line, all receptions Device is also all concatenated with one another, and after receiving the intermediate frequency differential wave that this CAT5 transmission line is transmitted by a specific receiver, then will Intermediate frequency differential wave is sent to after other receiver homographic solutions are tuned as digital audio-video signal and exports.
Pass through the above detailed description of preferred embodiments, it would be desirable to feature and spirit of the invention are more clearly described, and Not scope of the invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, the purpose is to wish Various changes can be covered and have being arranged in the scope of the scope of the patents to be applied of the invention of equality.

Claims (35)

1. a kind of audio/video transmission system, includes:
One conveyer includes:
One first receiving module, to receive one first audio-visual input signal;
One first modulating module couples first receiving module, corresponds to one the first audio-visual input signal to be tuned as One first pair of middle frequency difference of the first frequency range moves signal;And
One first output module couples first modulating module, moves signal to export first pair of middle frequency difference;
One transmission line couples first output module, moves signal to transmit first pair of middle frequency difference;And
Multiple receivers, wherein one first receiver in multiple receiver includes:
One second receiving module, couples the transmission line, moves signal to receive first pair of middle frequency difference, and by first pair of intermediate frequency Differential wave exports the second receiver into multiple receiver;
One first solution modulating module, couples second receiving module, which has one first setting frequency range, should First solution modulating module receives first pair of middle frequency difference from second receiving module and moves signal, if first pair of middle frequency difference is dynamic First frequency range of signal corresponds to first setting frequency range, which moves signal solution for first pair of middle frequency difference It is tuned as the first audio-visual input signal;And
One second output module couples the first solution modulating module, to export the first audio-visual input signal;
Wherein multiple receiver concatenates together, and the conveyer is coupled to first receiver by the transmission line.
2. audio/video transmission system as described in claim 1, which is characterized in that the transmission line includes four pairs of twisted pairs, for The conveyer transmits first pair of middle frequency difference by one first pair of twisted pair of the transmission line and moves signal to first receiver.
3. audio/video transmission system as described in claim 1, which is characterized in that the conveyer also includes that a network signal receives Module, to receive a network signal and transmit the network signal to first output module, to pass through the transmission line for the net Network signal is sent to first receiver.
4. audio/video transmission system as claimed in claim 3, which is characterized in that the transmission line includes four pairs of twisted pairs, for The conveyer transmits the network signal to twisted pair by one second pair of twisted pair of the transmission line and a third and first connects to this Receive device.
5. audio/video transmission system as claimed in claim 3, which is characterized in that first receiver also includes a network signal Output module couples second receiving module, to receive the network signal and export to outside.
6. audio/video transmission system as described in claim 1, which is characterized in that the conveyer also includes a control module, coupling It is connected to first modulating module and first output module, to send a control signal.
7. audio/video transmission system as claimed in claim 6, which is characterized in that the transmission line includes four pairs of twisted pairs, for The conveyer transmits the control signal to first receiver by one the 4th pair of twisted pair of the transmission line.
8. audio/video transmission system as described in claim 1, which is characterized in that first receiver also includes signal transmission Module is coupled to second receiving module, is sent to the second receiver first pair of middle frequency difference is moved signal.
9. audio/video transmission system as claimed in claim 8, which is characterized in that first receiver also includes a control mould Block is coupled to the signal transmission module and the first solution modulating module, to send a control signal.
10. audio/video transmission system as described in claim 1, which is characterized in that the second receiver includes:
One third receiving module couples first receiver, moves signal to receive first pair of middle frequency difference;
One second solution modulating module, couples the third receiving module, which has one second setting frequency range, should Second solution modulating module receives first pair of middle frequency difference from the third receiving module and moves signal, if first pair of middle frequency difference is dynamic First frequency range of signal corresponds to second setting frequency range, which moves signal solution for first pair of middle frequency difference It is tuned as the first audio-visual input signal;And
One third output module couples the second solution modulating module, first audio-visual to receive this from the second solution modulating module Input signal simultaneously exports the first audio-visual input signal.
11. audio/video transmission system as described in claim 1, which is characterized in that also include:
One User's Interface is set to the conveyer and/or the receiver, with so that user operates or sets.
12. a kind of audio/video transmission system, includes:
Multiple conveyers, wherein one first conveyer in multiple conveyer includes:
One first receiving module, to receive one first audio-visual input signal;
One first modulating module couples first receiving module, corresponds to one the first audio-visual input signal to be tuned as One first pair of middle frequency difference of the first frequency range moves signal;And
One first output module couples first modulating module, synthesizes intermediate frequency differential wave to export a pair, wherein the pairing It include the dynamic letter of one second pair of middle frequency difference that first pair of middle frequency difference moves signal with correspond to one second frequency range at intermediate frequency differential wave Number, and second pair of middle frequency difference moves one second conveyer of the signal in multiple conveyer;
One transmission line couples first output module, moves signal to synthesis middle frequency difference to transmit this;And
Multiple receivers, wherein one first receiver in multiple receiver includes:
One second receiving module, couples the transmission line, moves signal and by this to synthesis intermediate frequency to synthesis middle frequency difference to receive this Differential wave exports the second receiver into multiple receiver;
One first solution modulating module, couples second receiving module, which has one first setting frequency range, should First solution modulating module receive from second receiving module this signal is moved to synthesis middle frequency difference, if this is dynamic to synthesis middle frequency difference First frequency range that first pair of middle frequency difference in signal moves signal corresponds to first setting frequency range, the first solution modulating module It is the first audio-visual input signal that first pair of middle frequency difference, which is moved signal demodulation,;And
One second output module couples the first solution modulating module, to export the first audio-visual input signal;
Wherein together, multiple receiver concatenates together multiple conveyer concatenation, and first conveyer passes through the transmission line It is coupled to first receiver.
13. audio/video transmission system as claimed in claim 12, which is characterized in that the transmission line includes four pairs of twisted pairs, with This is transmitted by one first pair of twisted pair of the transmission line for first conveyer signal is moved to synthesis middle frequency difference and first connect to this Receive device.
14. audio/video transmission system as claimed in claim 12, which is characterized in that first conveyer also includes network letter Number receiving module, to receive a network signal and transmit the network signal to first output module, to pass through the transmission line The network signal is sent to first receiver.
15. audio/video transmission system as claimed in claim 14, which is characterized in that the transmission line includes four pairs of twisted pairs, with The network signal is transmitted to twisted pair by the one second pair of twisted pair and a third of the transmission line for first conveyer extremely should First receiver.
16. audio/video transmission system as claimed in claim 14, which is characterized in that first receiver also includes network letter Number output module, couples second receiving module, to receive the network signal and export to outside.
17. audio/video transmission system as claimed in claim 12, which is characterized in that first conveyer also includes a control mould Block is coupled to first modulating module and first output module, to send a control signal.
18. audio/video transmission system as claimed in claim 17, which is characterized in that the transmission line includes four pairs of twisted pairs, with The control signal is transmitted to first receiver by one the 4th pair of twisted pair of the transmission line for first conveyer.
19. audio/video transmission system as claimed in claim 12, which is characterized in that first receiver also includes that a signal passes Defeated module is coupled to second receiving module, is sent to the second receiver this is moved signal to synthesis middle frequency difference.
20. audio/video transmission system as claimed in claim 19, which is characterized in that first receiver also includes a control mould Block is coupled to the signal transmission module and the first solution modulating module, to send a control signal.
21. audio/video transmission system as claimed in claim 12, which is characterized in that the second receiver includes:
One third receiving module couples first receiver, moves signal to synthesis middle frequency difference to receive this;
One second solution modulating module, couples the third receiving module, which has one second setting frequency range, should Second solution modulating module receive from the third receiving module this signal is moved to synthesis middle frequency difference, if this is dynamic to synthesis middle frequency difference First frequency range that first pair of middle frequency difference in signal moves signal corresponds to second setting frequency range, the second solution modulating module It is the first audio-visual input signal that first pair of middle frequency difference, which is moved signal demodulation,;And
One third output module couples the second solution modulating module, first audio-visual to receive this from the second solution modulating module Input signal simultaneously exports the first audio-visual input signal.
22. audio/video transmission system as claimed in claim 12, which is characterized in that first conveyer also includes that a signal passes Defeated module is coupled to second conveyer and first output module, to receive this second pair from second conveyer Intermediate frequency differential wave simultaneously reaches first output module.
23. audio/video transmission system as claimed in claim 12, which is characterized in that second conveyer includes:
One the 4th receiving module, to receive one second audio-visual input signal;
One second modulating module, couples the 4th receiving module, is somebody's turn to do the second audio-visual input signal to be tuned as corresponding to Second pair of middle frequency difference of second frequency range moves signal;And
One the 4th output module couples second modulating module and first conveyer, dynamic to export second pair of middle frequency difference Signal is to first conveyer.
24. audio/video transmission system as claimed in claim 12, which is characterized in that also include:
One User's Interface is set to the conveyer and/or the receiver, with so that user operates or sets.
25. a kind of audio/video transmission system, includes:
Multiple conveyers, wherein one first conveyer in multiple conveyer includes:
One first receiving module, to receive one first audio-visual input signal;
One first modulating module couples first receiving module, corresponds to one the first audio-visual input signal to be tuned as One first pair of middle frequency difference of the first frequency range moves signal;And
One first output module couples first modulating module, synthesizes intermediate frequency differential wave to export a pair, wherein the pairing It include the dynamic letter of one second pair of middle frequency difference that first pair of middle frequency difference moves signal with correspond to one second frequency range at intermediate frequency differential wave Number, and second pair of middle frequency difference moves one second conveyer of the signal in multiple conveyer;
One transmission line couples first output module, moves signal to synthesis middle frequency difference to transmit this;And
One receiver includes:
One second receiving module, couples the transmission line, moves signal to synthesis middle frequency difference to receive this;
One first solution modulating module, couples second receiving module, which has one first setting frequency range, should First solution modulating module receive from second receiving module this signal is moved to synthesis middle frequency difference, if this is dynamic to synthesis middle frequency difference First frequency range that first pair of middle frequency difference in signal moves signal corresponds to first setting frequency range, the first solution modulating module It is the first audio-visual input signal that first pair of middle frequency difference, which is moved signal demodulation,;And
One second output module couples the first solution modulating module, to export the first audio-visual input signal;
Wherein multiple conveyer concatenates together, and first conveyer is coupled to the receiver by the transmission line.
26. audio/video transmission system as claimed in claim 25, which is characterized in that the transmission line includes four pairs of twisted pairs, with This is transmitted by one first pair of twisted pair of the transmission line for first conveyer, signal is moved to the receiver to synthesis middle frequency difference.
27. audio/video transmission system as claimed in claim 25, which is characterized in that first conveyer also includes network letter Number receiving module, to receive a network signal and transmit the network signal to first output module, to pass through the transmission line The network signal is sent to the receiver.
28. audio/video transmission system as claimed in claim 27, which is characterized in that the transmission line includes four pairs of twisted pairs, with The network signal is transmitted to twisted pair by the one second pair of twisted pair and a third of the transmission line for first conveyer extremely should Receiver.
29. audio/video transmission system as claimed in claim 27, which is characterized in that the receiver also includes that a network signal is defeated Module out couples second receiving module, to receive the network signal and export to outside.
30. audio/video transmission system as claimed in claim 25, which is characterized in that first conveyer also includes a control mould Block is coupled to first modulating module and first output module, to send a control signal.
31. audio/video transmission system as claimed in claim 30, which is characterized in that the transmission line includes four pairs of twisted pairs, with The control signal is transmitted to the receiver by one the 4th pair of twisted pair of the transmission line for first conveyer.
32. audio/video transmission system as claimed in claim 25, which is characterized in that the receiver also includes a control module, It is coupled to the first solution modulating module, to send a control signal.
33. audio/video transmission system as claimed in claim 25, which is characterized in that first conveyer also includes that a signal passes Defeated module is coupled to second conveyer and first output module, to receive this second pair from second conveyer Intermediate frequency differential wave simultaneously reaches first output module.
34. audio/video transmission system as claimed in claim 25, which is characterized in that second conveyer includes:
One third receiving module, to receive one second audio-visual input signal;
One second modulating module couples the third receiving module, is somebody's turn to do the second audio-visual input signal to be tuned as corresponding to Second pair of middle frequency difference of second frequency range moves signal;And
One third output module couples second modulating module and first conveyer, dynamic to export second pair of middle frequency difference Signal is to first conveyer.
35. audio/video transmission system as claimed in claim 25, which is characterized in that also include:
One User's Interface is set to the conveyer and/or the receiver, with so that user operates or sets.
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