CN105025323A - Video and audio transmission system - Google Patents

Abstract

An audio-visual transmission system comprises a transmitter, a transmission line and a plurality of receivers connected in series. The transmitter is coupled to the first receiver by a transmission line. The transmitter includes a first receiving module, a modulating module and a first output module. The modulation module modulates the audio-video input signal into a first pair of intermediate frequency differential signals corresponding to a first frequency band, and transmits the signals to the first receiver through a transmission line. The first receiver comprises a second receiving module, a demodulation module and a second output module. The second receiving module outputs the first pair of intermediate frequency differential signals to the second receiver. The demodulation module has a first set frequency band. If the first frequency band of the first pair of intermediate frequency differential signals corresponds to the first set frequency band, the demodulation module demodulates the first pair of intermediate frequency differential signals into audio-video input signals, and the audio-video input signals are output by the second output module.

Description

Audio/video transmission system

Technical field

The present invention is relevant with audio-visual transmission, particularly about a kind of audio/video transmission system of simplified wiring.

Background technology

Generally speaking, if audio/video transmission system is for reaching the function transmitting multiple HDMI signals simultaneously, the multiple conveyer in audio/video transmission system and the usual mode adopting radial wiring between receiver.For example, suppose that audio/video transmission system has four conveyers and four receivers, then each conveyer all needs to draw four transmission lines to be coupled to four receivers respectively, thus causes the wiring of whole audio/video transmission system can become very numerous and diverse and not easily arrange.

Especially the conveyer comprised at audio/video transmission system now and receiver may under more and more many application trends, and this seems even more serious and urgently to be resolved hurrily once the numerous and diverse and problem that is that not easily arrange of wiring.

Therefore, the present invention proposes a kind of audio/video transmission system, to solve the problems referred to above that prior art suffers 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 comprises a conveyer, a transmission line and multiple receiver.The plurality of receiver is connected in series together, and conveyer is coupled to the first receiver by transmission line.Conveyer comprises the first receiver module, the first modulating module and the first output module.First receiver module is in order to receive the first audio-visual input signal.First modulating module couples the first receiver module, in order to by the first audio-visual input signal, the first pair of middle frequency difference be tuned as corresponding to the first frequency range moves signal.First output module couples the first modulating module, moves signal in order to export first pair of middle frequency difference.Transmission line couples the first output module, moves signal in order to transmit first pair of middle frequency difference.The first receiver in the plurality of receiver comprises the second receiver module, first and separates modulating module and the second output module.Second receiver module coupled transmission lines, moves signal and first pair of middle frequency difference is moved signal export the second receiver in the plurality of receiver in order to receive first pair of middle frequency difference.First separates modulation module couples second receiver module, first separates modulating module has the first setting frequency range, first pair of middle frequency difference that first solution modulating module receives from the second receiver module moves signal, if first pair of middle frequency difference moves the first frequency range of signal corresponding to the first setting frequency range, first pair of middle frequency difference is moved signal receiving and becomes the first audio-visual input signal by the first solution modulating module.Second output module couples the first solution modulating module, in order to export the first audio-visual input signal.

In one embodiment, transmission line includes four pairs of twisted-pair feeders, transmits first pair of middle frequency difference move signal to the first receiver for conveyer by first pair of twisted-pair feeder of transmission line.

In one embodiment, conveyer also includes network signal receiver module, in order to receive network signal and to transmit network signal 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-pair feeders, passes through second pair of twisted-pair feeder and the 3rd pair of twisted-pair feeder transmission network signal to the first receiver of transmission line for conveyer.

In one embodiment, the first receiver also includes network signal output module, couples the second receiver module, in order to receive network signal and to export outside to.

In one embodiment, conveyer also includes control module, is coupled to modulating module and the first output module, to transmit control signal.

In one embodiment, transmission line includes four pairs of twisted-pair feeders, for four pair twisted-pair feeder transfer control signal to the first receiver of conveyer by transmission line.

In one embodiment, the first receiver also includes signal transmission module, is coupled to the second receiver module, is sent to the second receiver in order to first pair of middle frequency difference is moved signal.

In one embodiment, the first receiver also includes control module, is coupled to signal transmission module and first and separates modulating module, to transmit control signal.

In one embodiment, the second receiver comprises the 3rd receiver module, the second solution modulating module and the 3rd output module.3rd receiver module couples the first receiver, moves signal in order to receive first pair of middle frequency difference.Second separates modulation module couples the 3rd receiver module and has the second setting frequency range.First pair of middle frequency difference that second solution modulating module receives from the 3rd receiver module moves signal.If first pair of middle frequency difference moves the first frequency range of signal corresponding to the second setting frequency range, first pair of middle frequency difference is moved signal receiving and becomes the first audio-visual input signal by the second solution modulating module.3rd output module couples the second solution modulating module, receives the first audio-visual input signal in order to separate modulating module from second and exports the first audio-visual input signal.

In one embodiment, audio/video transmission system also comprises User's Interface, is arranged at conveyer and/or the first receiver, carries out operating or setting with for user.

Also be a kind of audio/video transmission system according to another specific embodiment of the present invention.In this embodiment, audio/video transmission system comprises multiple conveyer, a transmission line and multiple receiver.Together, the plurality of receiver is connected in series together the plurality of conveyer serial connection, and the first conveyer is coupled to the first receiver by transmission line.The first conveyer in the plurality of conveyer comprises the first receiver module, the first modulating module and the first output module.First receiver module is in order to receive the first audio-visual input signal.First modulating module couples the first receiver module, in order to by the first audio-visual input signal, the first pair of middle frequency difference be tuned as corresponding to the first frequency range moves signal.First output module couples the first modulating module, in order to export a pair synthesis intermediate frequency differential wave, wherein this moves signal to synthesis middle frequency difference and comprises first pair of middle frequency difference and move signal and correspond to second pair of middle frequency difference of the second frequency range and move signal, and second pair of middle frequency difference moves signal from the second conveyer in the plurality of conveyer.Transmission line couples the first output module, moves signal in order to transmit this to synthesis middle frequency difference.The first receiver in the plurality of receiver comprises the second receiver module, first and separates modulating module and the second output module.Second receiver module coupled transmission lines, moves signal to synthesis middle frequency difference and this is moved signal to synthesis middle frequency difference export the second receiver in the plurality of receiver in order to receive this.First separates modulation module couples second receiver module, first separates modulating module has the first setting frequency range, first separate modulating module receive from the second receiver module this to synthesis middle frequency difference move signal, if this corresponds to the first setting frequency range to the first frequency range that the synthesis middle frequency difference first pair of middle frequency difference moved in signal moves signal, first pair of middle frequency difference is moved signal receiving and becomes the first audio-visual input signal by the first solution modulating module.Second output module couples the first solution modulating module, in order to export the first audio-visual input signal.

Also be a kind of audio/video transmission system according to another specific embodiment of the present invention.In this embodiment, audio/video transmission system comprises multiple conveyer, a transmission line and a receiver.The plurality of conveyer is connected in series together, and the first conveyer is coupled to receiver by transmission line.The first conveyer in the plurality of conveyer comprises the first receiver module, the first modulating module and the first output module.First receiver module is in order to receive the first audio-visual input signal.First modulating module couples the first receiver module, in order to by the first audio-visual input signal, the first pair of middle frequency difference be tuned as corresponding to the first frequency range moves signal.First output module couples the first modulating module, in order to export a pair synthesis intermediate frequency differential wave, wherein this moves signal to synthesis middle frequency difference and comprises first pair of middle frequency difference and move signal and correspond to second pair of middle frequency difference of the second frequency range and move signal, and second pair of middle frequency difference moves signal from the second conveyer in the plurality of conveyer.Transmission line couples the first output module, moves signal in order to transmit this to synthesis middle frequency difference.Receiver comprises the second receiver module, first and separates modulating module and the second output module.Second receiver module coupled transmission lines, moves signal in order to receive this to synthesis middle frequency difference.First separates modulation module couples second receiver module, first separates modulating module has the first setting frequency range, first separate modulating module receive from the second receiver module this to synthesis middle frequency difference move signal, if this corresponds to the first setting frequency range to the first frequency range that the synthesis middle frequency difference first pair of middle frequency difference moved in signal moves signal, first pair of middle frequency difference is moved signal receiving and becomes the first audio-visual input signal by the first solution modulating module.Second output module couples the first solution modulating module, in order to export the first audio-visual input signal.

Compared to prior art, audio/video transmission system according to the present invention has following advantages:

(1) only need can extend audio-visual (HDMI) signal and network signal by the transmission line of a such as CAT5 simultaneously, effectively can improve prior art and the shortcoming that wiring complexity that plurality of transmission lines causes not easily arranges need be set.

(2) audio/video transmission system with different types is applicable to, no matter be video-audio signal distributor (Splitter) pattern of a conveyer to multiple receiver, or multiple conveyer is to matrix (Matrix) pattern of multiple receiver, also or multiple conveyer all can be suitable for video-audio signal switch (Switch) pattern of a receiver.

(3) all conveyers can be concatenated with one another and the HDMI signal received separately and network signal are all sent to specific conveyer, specific conveyer exports HDMI signal and network signal to specific receiver by a CAT5 transmission line, all receivers are also all concatenated with one another, and after receiving by specific receiver the HDMI signal and network signal that this CAT5 transmission line transmits, then each HDMI signal and network signal are sent to corresponding receiver respectively.

Can be further understood by following detailed Description Of The Invention and institute's accompanying drawings about the advantages and spirit of the present invention.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the audio/video transmission system illustrated according to a specific embodiment of the present invention.

Fig. 2 is the electrical block diagram of the conveyer TX illustrated in Fig. 1.

Fig. 3 is the electrical block diagram illustrating the first receiver RX1 in Fig. 1 and the second receiver RX2.

Fig. 4 is the schematic diagram of the audio/video transmission system illustrated according to another specific embodiment of the present invention.

Fig. 5 is the electrical block diagram illustrating the first conveyer TX1 in Fig. 4 and Fig. 6 and the second conveyer TX2.

Fig. 6 is the schematic diagram of the audio/video transmission system illustrated according to another specific embodiment of the present invention.

Fig. 7 is the electrical block diagram of the receiver RX illustrated 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-pair feeders

10,40,50: video-audio signal receiver 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 receiver module

18,28,38,48,58,68: signal transmission module

19,29,39,49,59,69: line concentration module

20,30,60: receiver module

22,32,62: separate 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 intermediate frequency differential wave

D ±, D1 ±, D2 ±: pair of control differential wave

N1 ±, N2 ±, N11 ±, N21 ±, N12 ±, N22 ±: a pair network differential wave

Embodiment

A preferred embodiment according to the present invention is a kind of audio/video transmission system.In this embodiment, audio/video transmission system 1 has video-audio signal distributor (Splitter) pattern of a conveyer to multiple receiver.Please refer to Fig. 1, Fig. 1 is the schematic diagram of the audio/video transmission system illustrated in this embodiment.

As shown in Figure 1, audio/video transmission system 1 comprises a conveyer TX, single transmission lines L and multiple receiver RX1 to RX4.In practical application, transmission line L can be such as a CAT5 transmission line comprising four pairs of twisted-pair feeders, in order to transfer to many four right differential waves, but not as limit.In addition, the quantity of the receiver in audio/video transmission system 1 is not also limited with four of this example, can adjust according to actual demand.

Conveyer TX is coupled to the first receiver RX1 by transmission line L; First receiver RX1, the second receiver RX2, the 3rd receiver RX3 and the 4th receiver RX4 are sequentially concatenated with one another by transmission line, that is first receiver RX1 couple the second receiver RX2, second receiver RX2 couples the 3rd receiver RX3, and the 3rd receiver RX3 couples the 4th receiver RX4.In practical application, those receivers RX1 to RX4 can be a CAT5 transmission line comprising four pairs of twisted-pair feeders in order to the transmission line be mutually connected in series, in order to transfer to many four right differential waves, but not as limit.

Then, please refer to Fig. 2, Fig. 2 is the electrical block diagram of the conveyer TX illustrated in Fig. 1.As shown in Figure 2, conveyer TX at least comprises video-audio signal receiver module 10, modulating module 12, output module 14; Control module 16, network signal receiver module 17, signal transmission module 18 and line concentration module 19 can be comprised again.Wherein, video-audio signal receiver module 10 couples modulating module 12; Modulating module 12 couples output module 14; Control module 16 couples modulating module 12, output module 14 and signal transmission module 18; Network signal receiver module 17 couples line concentration module 19; Line concentration module 19 couples output module 14 and signal transmission module 18.

In fact, video-audio signal receiver module 10 can be HDMI video-audio signal receiver, in order to receive digital audio-video signal; Network signal receiver module 17 can comprise RJ45 joint, in order to receive Ethernet signal, but all not as limit.

When video-audio signal receiver module 10 receives audio-visual input signal VS, audio-visual input signal VS can be tuned as a pair intermediate frequency differential wave IF ± corresponding to the first frequency range and be sent to output module 14 by modulating module 12, then by output module 14, this is moved signal IF ± export to a pair twisted-pair feeder (such as first couple of twisted-pair feeder L1) in transmission line L to middle frequency difference.In practical application, the audio-visual input signal VS received by video-audio signal receiver module 10 can be by couple and the audio-visual source apparatus (such as DVD player) corresponding to conveyer TX provided; Modulating module 12 is DVBT modulating module, can adopt OFDM (OrthogonalFrequency-Division Multiplexing, OFDM) and H.264 encode to carry out modulation and compression to audio-visual input signal, but not as limit.In addition, control module 16 can provide modulating module 12 frequency range to set.

Because transmission line L comprises four couples of twisted-pair feeder L1 to L4 altogether, therefore, except transmit first pair of middle frequency difference move signal IF ± first couple of twisted-pair feeder L1 except, also have second couple of twisted-pair feeder L2 can be used to transmission differential signal to the 4th couple of twisted-pair feeder L4.

In this embodiment, when network signal receiver module 17 receives network signal NS, network signal NS is sent to output module 14 via line concentration module 19 by network signal receiver module 17, then by output module 14 by couple twisted-pair feeder L2 and the 3rd of second in transmission line L couple twisted-pair feeder L3 export two couples of network differential wave N1 ± and N2 ±.

In addition, control module 16 can send control signal D ± to output module 14, and by output module 14 by the 4th couple of twisted-pair feeder L4 in transmission line L export pair of control differential wave D ±.This to control differential wave D ± can such as DVBT frequency range setting, volume control or other any control signals.

Then, please refer to Fig. 3, Fig. 3 is the electrical block diagram illustrating the first receiver RX1 in Fig. 1 and the second receiver RX2.As shown in Figure 3, the first receiver RX1 comprises receiver module 20, separates modulating module 22, output module 24, control module 26, network signal output module 27, signal transmission module 28 and line concentration module 29.Wherein, receiver module 20 couples and separates modulating module 22 and signal transmission module 28; Separate modulating module 22 and couple output module 24; Control module 26 couples separates modulating module 22 and signal transmission module 28; Network signal output module 27 couples line concentration module 29; Signal transmission module 28 is coupled to line concentration module 29, receiver module 20, separates modulating module 22 and control module 26.The signal transmission module 28 of the first receiver RX1 is coupled to the receiver module 30 of the second receiver RX2 by the transmission line of such as CAT-5.

The internal circuit configuration of the second receiver RX2 is identical with the first receiver RX1, comprises receiver module 30, separates modulating module 32, output module 34, control module 36, network signal output module 37, signal transmission module 38 and line concentration module 39.Wherein, receiver module 30 couples and separates modulating module 32 and signal transmission module 38; Separate modulating module 32 and couple output module 34; Control module 36 couples separates modulating module 32 and signal transmission module 38; Network signal output module 37 couples line concentration module 39; Signal transmission module 38 is coupled to receiver module 30, separates modulating module 32, control module 36 and line concentration module 39.

A pair intermediate frequency differential wave IF that first couple of twisted-pair feeder L1 that the receiver module 20 of the first receiver RX1 of coupled transmission lines L can receive transmission line L respectively transmits to the 4th couple of twisted-pair feeder L4 ±, two couples of network differential wave N1 ± and N2 ± and pair of control differential wave D ±.

When receiver module 20 receive this to control differential wave D ± time, this can be separated modulating module 22 and signal transmission module 28 to control differential wave D ± be sent to by receiver module 20.Receive that receiver module 20 sends when signal transmission module 28 this to control differential wave D ± time, signal transmission module 28 can by this to the receiver module 30 controlling differential wave D ± be sent to the second receiver RX2.Corresponding running is carried out, the such as setting of demodulation frequency conversion section to controlling differential wave D ± can make solution modulating module 22 by this.In addition, also directly the setting of separating modulating module 22 can be carried out by the control module 26 of the first receiver RX1.

When receiver module 20 receive this to middle frequency difference move signal IF ± time, this can be moved signal IF ± be sent to respectively to middle frequency difference and separate modulating module 22 and signal transmission module 28 by receiver module 20.Receive that receiver module 20 sends when signal transmission module 28 this to middle frequency difference move signal IF ± time, this can be moved the receiver module 30 of signal IF ± be sent to the second receiver RX2 by signal transmission module 28 to middle frequency difference.Separate modulating module 22 and there is the first setting frequency range.When separate that modulating module 22 receives that receiver module 20 sends this to middle frequency difference move signal IF ± time, if this to middle frequency difference move signal IF ± the first frequency range correspond to first setting frequency range, this can be moved signal IF ± solution to middle frequency difference and be tuned as audio-visual input signal VS by solution modulating module 22, and export audio-visual input signal VS by output module 24, such as audio-visual input signal VS is exported to and couple and correspond to the video and audio output device (such as TV or monitor) of the first receiver RX1, but not as limit.

When receiver module 20 receive these two couples of network differential wave N1 ± and N2 ± time, receiver module 20 can by line concentration module 29 by this two couples of network differential wave N1 ± and N2 ± be sent to network signal output module 27 and signal transmission module 28.When signal transmission module 28 receive these two couples of network differential wave N1 ± that receiver module 20 sends and N2 ± time, signal transmission module 28 can by the receiver module 30 of this two couples of network differential wave N1 ± and N2 ± be sent to the second receiver RX2.When network signal output module 27 receive these two couples of network differential wave N1 ± that receiver module 20 sends and N2 ± time, if these two couples of network differential wave N1 ± and N2 ± corresponding to the first receiver RX1, network signal output module 27 can export this two couples of network differential wave N1 ± and N2 ±, such as by this two couples of network differential wave N1 ± and N2 ± export a network to, but not as limit.

Receive that the signal transmission module 28 of the first receiver RX1 sends when the receiver module 30 of the second receiver RX2 this to middle frequency difference move signal IF ±, these two couples of network differential wave N1 ± and N2 ± and this to control differential wave D ± time, this can be separated modulating module 32 and signal transmission module 38 to control differential wave D ± be sent to respectively by receiver module 30, and this is moved signal IF ± be sent to respectively to middle frequency difference separate modulating module 32 and signal transmission module 38, and by line concentration module 39 by this two couples of network differential wave N1 ± and N2 ± be sent to network signal output module 37 and signal transmission module 38.

Receive that receiver module 30 sends when signal transmission module 38 this to control differential wave D ± time, signal transmission module 38 can by this to control differential wave D ± be sent to the 3rd receiver RX3.Corresponding running is carried out, the such as setting of demodulation frequency conversion section to controlling differential wave D ± can make solution modulating module 32 by this.In addition, also directly the setting of separating modulating module 32 can be carried out by the control module 36 of the second receiver RX2.

Receive that receiver module 30 sends when signal transmission module 38 this to middle frequency difference move signal IF ± time, this can be moved signal IF ± be sent to the 3rd receiver RX3 to middle frequency difference by signal transmission module 38.Separate modulating module 32 and there is setting frequency range.When separate that modulating module 32 receives that receiver module 30 sends this to middle frequency difference move signal IF ± time, if this to middle frequency difference move signal IF ± the first frequency range correspond to and separate the setting frequency range of modulating module 32, this can be moved signal IF ± solution to middle frequency difference and be tuned as audio-visual input signal VS by solution modulating module 32, and export audio-visual input signal VS by output module 34, such as audio-visual input signal VS is exported to and couple and correspond to the video and audio output device (such as TV or monitor) of the second receiver RX2, but not as limit.

When signal transmission module 38 receive these two couples of network differential wave N1 ± that receiver module 30 sends and N2 ± time, signal transmission module 38 can by this two couples of network differential wave N1 ± and N2 ± be sent to the 3rd receiver RX3.When network signal output module 37 receive these two couples of network differential wave N1 ± that receiver module 30 sends and N2 ± time, network signal output module 37 can export this two couples of network differential wave N1 ± and N2 ±.

In practical application, audio/video transmission system 1 also can comprise User's Interface, and this User's Interface is coupled to control module.The visual actual demand of User's Interface is only arranged at conveyer TX or the first receiver RX1, even arbitrary receiver, or be arranged at conveyer TX and receiver simultaneously, carry out the operation of channel selection, frequency range setting or the transmission of other control signals and relevant setting for user.User's Interface can be button pattern or remote controller pattern, there is no specific restriction.

As for by the second receiver RX2 by this to middle frequency difference move signal IF ±, these two couples of network differential wave N1 ± and N2 ± and this to control differential wave D ± transfer to the 3rd receiver RX3 situation and by the 3rd receiver RX3 by this to middle frequency difference move signal IF ±, this two couples of network differential wave N1 ± and N2 ± and this is to the situation controlling differential wave D ± transfer to the 4th receiver RX4, also consistent with previous embodiment, therefore do not repeat separately in this.

In sum, in the audio/video transmission system 1 with video-audio signal distributor (Splitter) pattern, conveyer TX only needs to export HDMI digital audio-video signal to multiple collector by a CAT5 transmission line simultaneously, and it is all concatenated with one another to the 4th receiver RX4 by the first receiver RX1, therefore each HDMI digital audio-video signal received by the first receiver RX1 can be sent to corresponding receiver, effectively can improve prior art and the shortcoming that wiring complexity that plurality of transmission lines causes not easily arranges need be set.In addition, audio/video transmission system 1 also only needs a CAT5 transmission line can reach the effect simultaneously transmitting digital audio-video signal, network signal and control signal.

Also be a kind of audio/video transmission system according to another preferred embodiment of the present invention.In this embodiment, audio/video transmission system 2 has matrix (Matrix) pattern of multiple conveyer to multiple receiver.Please refer to Fig. 4, Fig. 4 illustrates the schematic diagram of the audio/video transmission system in this embodiment.

As shown in Figure 4, audio/video transmission system 2 comprises multiple conveyer TX1 to TX4, single transmission lines L and multiple receiver RX1 to RX4.In practical application, transmission line L can be such as a CAT5 transmission line comprising four pairs of twisted-pair feeders, in order to transfer to many four right differential waves, but not as limit.In addition, the conveyer in audio/video transmission system 2 and the quantity of receiver are not also limited with four of this example, can adjust according to actual demand.

The first conveyer TX1 in audio/video transmission system 2, the second conveyer TX2, the 3rd conveyer TX3 and the 4th conveyer TX4 are by as sequentially concatenated with one another in CAT5 transmission line, that is first conveyer TX1 couple the second conveyer TX2, second conveyer TX2 couples the 3rd conveyer TX3, and the 3rd conveyer TX3 couples the 4th conveyer TX4; First receiver RX1, the second receiver RX2, the 3rd receiver RX3 and the 4th receiver RX4 are by as sequentially concatenated with one another in CAT5 transmission line, that is first receiver RX1 couple the second receiver RX2, second receiver RX2 couples the 3rd receiver RX3, and the 3rd receiver RX3 couples the 4th receiver RX4.First conveyer TX1 is coupled to the first receiver RX1 by such as CAT5 transmission line L.

Then, please refer to Fig. 5, Fig. 5 is the electrical block diagram illustrating the first conveyer TX1 in Fig. 4 and the second conveyer TX2.As shown in Figure 5, the first conveyer TX1 comprises video-audio signal receiver module 40, modulating module 42, output module 44, control module 46, network signal receiver module 47, signal transmission module 48 and line concentration module 49.Wherein, video-audio signal receiver module 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 receiver module 47 couples line concentration module 49; Line concentration module 49 couples output module 44 and signal transmission module 48.

The circuit structure of the second conveyer TX2 is identical with the first conveyer TX1, comprises video-audio signal receiver module 50, modulating module 52, output module 54, control module 56, network signal receiver module 57, signal transmission module 58 and line concentration module 59.Wherein, video-audio signal receiver 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 receiver module 57 couples line concentration module 59; Line concentration module 59 couples output module 54 and signal transmission module 58.

Video-audio signal receiver module 40 and 50 can be such as HDMI video-audio signal receiver, in order to receive digital audio-video signal; Network signal receiver module 47 and 57 can comprise RJ45 joint, in order to receive Ethernet signal, but all not as limit.

With the second conveyer TX2, when video-audio signal receiver module 50 receives audio-visual input signal VS2, audio-visual input signal VS2 can be tuned as a pair second intermediate frequency differential waves corresponding to the second frequency range by modulating module 52, and the differential signal combination of the intermediate frequency intermediate frequency differential wave IF2 in a pair of a pair synthesis from the 3rd conveyer TX3 transmitted with signal transmission module 58 ± after be sent to output module 54, and be sent to the signal transmission module 48 of the first conveyer TX1 by a pair twisted-pair feeder in CAT5 transmission line L.

It should be noted that, from the 3rd conveyer TX3 this to the intermediate frequency differential wave of synthesis comprise corresponding to the 3rd frequency range of the 3rd conveyer TX3 a pair the 3rd intermediate frequency differential waves and correspond to a pair the 4th intermediate frequency differential waves of the 4th frequency range of the 4th conveyer TX4, because CAT5 transmission line L transmissible frequency range scope is quite large, generally speaking the different channel that 15 have 6M frequency range can at least be transmitted, therefore, even if will this of the second frequency range be corresponded to the second intermediate frequency differential wave, corresponding to the 3rd frequency range this to the 3rd intermediate frequency differential wave and correspond to the 4th frequency range this to the differential signal combination of the 4th intermediate frequency intermediate frequency differential wave IF2 in a pair ±, when CAT5 transmission line L transmit this to middle frequency difference move signal IF2 ± time, corresponding to this of different frequency range to the second intermediate frequency differential wave, this can't interfere with each other the 4th intermediate frequency differential wave the 3rd intermediate frequency differential wave and this.

In addition, output module 54 also can by receive from the network differential wave N12 ± of the 3rd conveyer TX3 and the 4th conveyer TX4 and N22 ± and control differential wave D2 ±, be sent to the signal transmission module 48 of the first conveyer TX1 respectively by the another three pairs of twisted-pair feeders in CAT5 transmission line L.Wherein line concentration module (HUB) 49 will carry out the process of those network signals according to Ethernet agreement.

With the first conveyer TX1, when video-audio signal receiver module 40 receives audio-visual input signal VS1, modulating module 42 audio-visual input signal VS1 can be tuned as corresponding to the first frequency range a pair first intermediate frequency differential wave IF1 ±, and with signal transmission module 48 transmit from the second conveyer TX2 this to middle frequency difference move signal IF2 ± be combined into a pair intermediate frequency differential wave IF ± after be sent to output module 44, by output module 44, this is moved signal IF ± export to a pair twisted-pair feeder (such as first couple of twisted-pair feeder L1) in transmission line L to middle frequency difference again, to be sent to the first receiver RX1.

It should be noted that, because CAT5 transmission line L transmissible frequency range scope is quite large, generally speaking the different channel that 15 have 6M frequency range can at least be transmitted, therefore, even if this is moved signal IF2 ± (comprise corresponding to this of the second frequency range the second intermediate frequency differential wave to middle frequency difference, corresponding to this of the 3rd frequency range to the 3rd intermediate frequency differential wave and correspond to this of 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 middle frequency difference move signal IF ±, when transmission line L transmit this to middle frequency difference move signal IF ± time, this corresponding respectively to different frequency range is to the first intermediate frequency differential wave, this is to the second intermediate frequency differential wave, this can't interfere with each other the 4th intermediate frequency differential wave the 3rd intermediate frequency differential wave and this.

In like manner, output module 44 also can by receive from the network differential wave N1 ± of other conveyer and N2 ± and control differential wave D ±, and be sent to the first receiver RX1 by the another three couples of twisted-pair feeder L2 to L4 in transmission line L.

By the way, suppose that transmission line L at least can transmit the different channel that 15 have 6M frequency range, then audio/video transmission system 2 even can comprise 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 the second receiver RX2, first receiver RX1 of the audio/video transmission system 1 illustrated due to itself and Fig. 3 and the circuit structure of the second receiver RX2 consistent, its difference be only this in audio/video transmission system 2 middle frequency difference is moved that signal IF ± include corresponds respectively to different frequency range this to the first intermediate frequency differential wave, this is to the second intermediate frequency differential wave, this is to the 3rd intermediate frequency differential wave and this is to the 4th intermediate frequency differential wave, and this in audio/video transmission system 1 moves signal IF ± only comprise corresponding to this of the first frequency range to the first intermediate frequency differential wave to middle frequency difference, therefore please refer to Fig. 3 and relevant to describe, do not repeat separately in this.

For example, suppose that user wishes to correspond to the display of the second receiver RX2 and can play the digital audio-video signal VS2 that the DVD player corresponding to the second conveyer TX2 provides, user sets by the User's Interface being arranged at arbitrary conveyer or receiver, the frequency range of intermediate frequency differential wave that the solution modulating module 32 of the second receiver RX2 is set modulating module 52 that frequency range corresponded to the second conveyer TX2 exports, audio-visual input signal VS2 can be tuned as a pair second intermediate frequency differential waves corresponding to the second frequency range by the modulating module 52 due to the second conveyer TX2, and be contained in this to middle frequency difference move signal IF ± in this first can be sent to the first conveyer TX1 to the second intermediate frequency differential wave after, the first receiver RX1 is sent to again by transmission line L, and be orderly sent to the second receiver RX2 to the 4th receiver RX4.

As shown in Figure 3, receive that receiver module 30 sends when the solution modulating module 32 of the second receiver RX2 this to middle frequency difference move signal IF ± time, due to this to middle frequency difference move signal IF ± in this to the second frequency range of the second intermediate frequency differential wave correspond to separate modulating module 32 second setting frequency range, separate modulating module 32 can by this to middle frequency difference move signal IF ± in this be audio-visual input signal VS2 to the differential signal demodulation of the second intermediate frequency, and by output module 34, the display that audio-visual input signal VS2 exports to corresponding to the second receiver RX2 to be play.Therefore, the solution modulating module of those receivers may correspond to the required frequency range of setting, with by this to middle frequency difference move signal IF ± in the corresponding differential signal demodulation of intermediate frequency be audio-visual input signal, and then export corresponding audio-visual input signal, relatively, this to middle frequency difference move signal IF ± in other non-to set with the solution modulating module of receiver intermediate frequency differential wave that frequency range conforms to then can sustained delivery to next receiver, carry out solution be tuned as audio-visual input signal until set the frequency range Shi Caihui that conforms to the solution modulating module of a certain receiver.

In sum, it is first intermediate frequency differential wave by digital audio-video modulating signal that the present invention has in the audio/video transmission system 2 of matrix (Matrix) pattern, and it is all concatenated with one another to the 4th conveyer TX4 by the first conveyer TX1, first receiver RX1 is all concatenated with one another to the 4th receiver RX4, therefore each digital audio-video signal received by the first conveyer TX1 to the 4th conveyer TX4 can be sent to the first conveyer TX1, first conveyer TX1 only needs simultaneously the intermediate frequency differential wave after the digital audio-video signal that each conveyer receives carries out modulation to be exported to the first receiver RX1 by a CAT5 transmission line, all receivers are sent to again by the first receiver RX1, after be export differential for the intermediate frequency of correspondence signals revivification after digital audio-video signal by the solution modulating module of each receiver, therefore effectively can improve prior art the shortcoming that wiring complexity that plurality of transmission lines causes not easily arranges need be set.

Also be a kind of audio/video transmission system according to another preferred embodiment of the present invention.In this embodiment, audio/video transmission system 3 has video-audio signal switch (Switch) pattern of multiple conveyer to single receiver, and this receiver can select the audio-visual source of the conveyer in those conveyers to export.Please refer to Fig. 6, Fig. 6 is the schematic diagram of the audio/video transmission system illustrated in this embodiment.

As shown in Figure 6, audio/video transmission system 3 comprises multiple conveyer TX1 to TX4, single transmission lines L and single receiver RX.In practical application, transmission line L can be such as a CAT5 transmission line comprising four pairs of twisted-pair feeders, in order to transfer to many four right differential waves, but not as limit.In addition, the quantity of the conveyer in audio/video transmission system 3 is not also limited with four of this example, can adjust according to actual demand.

The first conveyer TX1 in audio/video transmission system 3, the second conveyer TX2, the 3rd conveyer TX3 and the 4th conveyer TX4 are by as sequentially concatenated with one another in CAT5 transmission line, that is first conveyer TX1 couple the second conveyer TX2, second conveyer TX2 couples the 3rd conveyer TX3, and the 3rd conveyer TX3 couples the 4th conveyer TX4.First conveyer TX1 is coupled to receiver RX by such as CAT5 transmission line L.

Electrical block diagram about the first conveyer TX1 in audio/video transmission system 3 and the second conveyer TX2 also please refer to Fig. 5.As shown in Figure 5, the first conveyer TX1 comprises video-audio signal receiver module 40, modulating module 42, output module 44, control module 46, network signal receiver module 47, signal transmission module 48 and line concentration module 49.Wherein, video-audio signal receiver module 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 receiver module 47 couples line concentration module 49; Line concentration module 49 couples output module 44 and signal transmission module 48.

The circuit structure of the second conveyer TX2 is identical with the first conveyer TX1, comprises video-audio signal receiver module 50, modulating module 52, output module 54, control module 56, network signal receiver module 57, signal transmission module 58 and line concentration module 59.Wherein, video-audio signal receiver 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 receiver module 57 couples line concentration module 59; Line concentration module 59 couples output module 54 and signal transmission module 58.

As in the prior embodiments, because CAT5 transmission line L transmissible frequency range scope is quite large, generally speaking the different channel that 15 have 6M frequency range can at least be transmitted, therefore, even if the output module 44 of the first conveyer TX1 export transmission line L to this signal IF ± move signal combination by the four pairs of middle frequency differences corresponding respectively to different frequency range to form is moved to middle frequency difference, when transmission line L transmit this signal IF ± to receiver RX is moved to middle frequency difference time, these four pairs of middle frequency differences move signal and can't interfere with each other.

In like manner, output module 44 also can by receive from the network differential wave N1 ± of other conveyer and N2 ± and control differential wave D ±, and be sent to receiver RX by the another three couples of twisted-pair feeder L2 to L4 in transmission line L.

By the way, suppose that transmission line L at least can transmit the different channel that 15 have 6M frequency range, then audio/video transmission system 3 even can comprise 15 conveyers concatenated with one another, but not as limit.

Then, please refer to Fig. 7, Fig. 7 is the electrical block diagram of the receiver RX illustrated in Fig. 6.As shown in Figure 7, receiver RX at least comprises receiver module 60, separates modulating module 62, output module 64; Control module 66, network signal output module 67, signal transmission module 68 and line concentration module 69 can be comprised again.Wherein, receiver module 60 couples and separates modulating module 62; Separate modulating module 62 and couple output module 64; Control module 66 couples separates modulating module 62; Network signal output module 67 couples line concentration module 69; Signal transmission module 68 is coupled to line concentration module 69, receiver module 60, separates modulating module 62 and control module 66.

A pair intermediate frequency differential wave IF that first couple of twisted-pair feeder L1 that the receiver module 60 of the receiver RX of coupled transmission lines L can receive transmission line L transmits to the 4th couple of twisted-pair feeder L4 ±, two couples of network differential wave N1 ± and N2 ± and pair of control differential wave D ±.

When receiver module 60 receive this to control differential wave D ± time, this can be separated modulating module 62 to control differential wave D ± be sent to by receiver module 60.Corresponding running is carried out, the such as setting of demodulation frequency conversion section to controlling differential wave D ± can make solution modulating module 62 by this, but not as limit.In addition, also directly the setting of separating modulating module 62 can be carried out by the control module 66 of receiver RX.

When receiver module 60 receive this to middle frequency difference move signal IF ± time, this can be moved signal IF ± be sent to middle frequency difference and separate modulating module 62 by receiver module 60.Separate modulating module 62 and there is specific settings frequency range.Due to this to middle frequency difference move signal IF ± by the four pairs of middle frequency differences corresponding respectively to four different frequency ranges (the first frequency range is to the 4th frequency range) move signal (this to the first intermediate frequency differential wave to this to the 4th intermediate frequency differential wave) be combined into, therefore, when separate modulating module 62 receive this to middle frequency difference move signal IF ± time, illustrate, if this to middle frequency difference move signal IF ± in this first frequency range of the first intermediate frequency differential wave corresponded to separate the specific settings frequency range of modulating module 62, then separating modulating module 62 can be audio-visual input signal VS1 to the differential signal demodulation of the first intermediate frequency by this, and export audio-visual input signal VS1 by output module 64, such as audio-visual input signal VS1 is exported to and couple and correspond to the video and audio output device (such as TV or monitor) of receiver RX, but not as limit.

In like manner, if this to middle frequency difference move signal IF ± in this second frequency range of the second intermediate frequency differential wave corresponded to separate the specific settings frequency range of modulating module 62, then separating modulating module 62 can be audio-visual input signal VS2 to the differential signal demodulation of the second intermediate frequency by this, and exports audio-visual input signal VS2 by output module 64.The rest may be inferred for all the other.

When receiver module 60 receive these two couples of network differential wave N1 ± and N2 ± time, receiver module 60 can by line concentration module 69 by this two couples of network differential wave N1 ± and N2 ± be sent to network signal output module 67, and network signal output module 67 can by this two couples of network differential wave N1 ± and N2 ± export a network to.

In practical application, audio/video transmission system 3 also can comprise User's Interface, and this User's Interface is coupled to control module.The visual actual demand of User's Interface is only arranged at receiver RX or the first conveyer TX1, even arbitrary conveyer, or be arranged at receiver RX and conveyer simultaneously, carry out the operation of channel selection, frequency range setting or the transmission of other control signals and relevant setting for user.User's Interface can be button pattern or remote controller pattern, there is no specific restriction.

In sum, in the audio/video transmission system 3 with video-audio signal switch (Switch) pattern, because the first conveyer TX1 is all concatenated with one another to the 4th conveyer TX4, first conveyer TX1 only needs to export the HDMI digital audio-video signal from the audio-visual source of difference to receiver RX by a CAT5 transmission line simultaneously, effectively can improve prior art and the shortcoming that wiring complexity that plurality of transmission lines causes not easily arranges need be set, and user switches the output in different audio-visual source by the specific settings frequency range of solution modulating module 62 or the mode of the frequency range of the modulating module of each conveyer changing receiver RX.In addition, audio/video transmission system 3 also only needs a CAT5 transmission line can reach the effect simultaneously transmitting digital audio-video signal, network signal and control signal.

Compared to prior art, audio/video transmission system according to the present invention has following advantages:

(1) audio/video transmission system with different types is applicable to, no matter be video-audio signal distributor (Splitter) pattern of a conveyer to multiple receiver, or multiple conveyer is to matrix (Matrix) pattern of multiple receiver, also or multiple conveyer to audio-visual switch (Switch) pattern of a receiver, only need get final product transmitting audio-video signal (even simultaneously transmitting network signal and control signal) by a CAT5 transmission line, effectively can improve prior art and the shortcoming that wiring complexity that plurality of transmission lines causes not easily arranges need be set.Be noted that in addition, traditionally, multimedia video signal includes high-frequency signal of video signal usually, again because high-frequency signal is more easily decayed when transmitting, therefore there is the frequency range (about 100MH) of high-frequency multimedia video signal (as HDMI or DVI signal) often beyond 5 class transmission lines (CAT5 line) transfers loads, therefore, if multimedia video signal does not have treated words, be difficult to carry out long range propagation by 5 class transmission lines.Such as, but the differential wave first utilizing modulating module multimedia video signal to be converted to frequency to be less than or equal to 30MHz by the present invention, be intermediate frequency differential wave, the transmission line being applicable to 5 classes transmits.

(2) all conveyers are all concatenated with one another and be sent to a specific conveyer after intermediate frequency differential wave by the digital audio-video modulating signal received separately, intermediate frequency differential wave is exported by a CAT5 transmission line by specific conveyer, all receivers are also all concatenated with one another, and after receiving by a specific receiver intermediate frequency differential wave that this CAT5 transmission line transmits, then intermediate frequency differential wave is sent to after other receiver homographic solution is tuned as digital audio-video signal and exports.

By the above detailed description of preferred embodiments, it is desirable to clearly to describe feature of the present invention and spirit, and not with above-mentioned disclosed preferred embodiment, category of the present invention is limited.On the contrary, its objective is wish to contain various change and tool equality be arranged in the present invention institute in the category of the scope of the claims applied for.

Claims (35)

1. an audio/video transmission system, comprises:

One conveyer, comprises:

One first receiver module, in order to receive one first audio-visual input signal;

One first modulating module, couples this first receiver module, in order to by this first audio-visual input signal, the one first pair of middle frequency difference be tuned as corresponding to one first frequency range moves signal; And

One first output module, couples this first modulating module, moves signal in order to export this first pair of middle frequency difference;

One transmission line, couples this first output module, moves signal in order to transmit this first pair of middle frequency difference; And

Multiple receiver, one first receiver wherein in the plurality of receiver comprises:

One second receiver module, couples this transmission line, moves signal in order to receive this first pair of middle frequency difference, and this first pair of middle frequency difference is moved signal and export one second receiver in the plurality of receiver to;

One first separates modulating module, couple this second receiver module, this the first solution modulating module has one first setting frequency range, this first pair of middle frequency difference that this first solution modulating module receives from this second receiver module moves signal, if this first frequency range that this first pair of middle frequency difference moves signal corresponds to this first setting frequency range, this first pair of middle frequency difference is moved signal receiving and becomes this first audio-visual input signal by this first solution modulating module; And

One second output module, couples this first solution modulating module, in order to export this first audio-visual input signal;

Wherein the plurality of receiver serial connection together, and this conveyer is coupled to this first receiver by this transmission line.

2. audio/video transmission system as claimed in claim 1, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this first pair of middle frequency difference move signal to this first receiver for this conveyer by one first pair of twisted-pair feeder of this transmission line.

3. audio/video transmission system as claimed in claim 1, it is characterized in that, this conveyer also includes a network signal receiver module, in order to receive a network signal and to transmit this network signal to this first output module, this network signal is sent to this first receiver by this transmission line.

4. audio/video transmission system as claimed in claim 3, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this network signal to this first receiver for this conveyer by one second pair of twisted-pair feeder of this transmission line and one the 3rd pair of twisted-pair feeder.

5. audio/video transmission system as claimed in claim 3, it is characterized in that, this first receiver also includes a network signal output module, couples this second receiver module, in order to receive this network signal and to export outside to.

6. audio/video transmission system as claimed in claim 1, it is characterized in that, this conveyer also includes a control module, is coupled to this modulating module and this first output module, to send a control signal.

7. audio/video transmission system as claimed in claim 6, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this control signal to this first receiver for this conveyer by one the 4th pair of twisted-pair feeder of this transmission line.

8. audio/video transmission system as claimed in claim 1, it is characterized in that, this first receiver also includes a signal transmission module, is coupled to this second receiver module, is sent to this second receiver in order to this first pair of middle frequency difference is moved signal.

9. audio/video transmission system as claimed in claim 8, it is characterized in that, this first receiver also includes a control module, is coupled to this signal transmission module and this first separates modulating module, to send a control signal.

10. audio/video transmission system as claimed in claim 1, it is characterized in that, this second receiver comprises:

One the 3rd receiver module, couples this first receiver, moves signal in order to receive this first pair of middle frequency difference;

One second separates modulating module, couple the 3rd receiver module, this the second solution modulating module has one second setting frequency range, this first pair of middle frequency difference that this second solution modulating module receives from the 3rd receiver module moves signal, if this first frequency range that this first pair of middle frequency difference moves signal corresponds to this second setting frequency range, this first pair of middle frequency difference is moved signal receiving and becomes this first audio-visual input signal by this second solution modulating module; And

One the 3rd output module, couples this second solution modulating module, in order to receive this first audio-visual input signal from this second solution modulating module and to export this first audio-visual input signal.

11. audio/video transmission systems as claimed in claim 1, is characterized in that, also comprise:

One User's Interface, is arranged at this conveyer and/or this receiver, carries out operating or setting with for user.

12. 1 kinds of audio/video transmission systems, comprise:

Multiple conveyer, one first conveyer wherein in the plurality of conveyer comprises:

One first receiver module, in order to receive one first audio-visual input signal;

One first modulating module, couples this first receiver module, in order to by this first audio-visual input signal, the one first pair of middle frequency difference be tuned as corresponding to one first frequency range moves signal; And

One first output module, couple this first modulating module, in order to export a pair synthesis intermediate frequency differential wave, wherein this moves signal to synthesis middle frequency difference and comprises this first pair of middle frequency difference and move signal and correspond to one second pair of middle frequency difference of one second frequency range and move signal, and this second pair of middle frequency difference moves signal from one second conveyer in the plurality of conveyer;

One transmission line, couples this first output module, moves signal in order to transmit this to synthesis middle frequency difference; And

Multiple receiver, one first receiver wherein in the plurality of receiver comprises:

One second receiver module, couples this transmission line, synthesis middle frequency difference moved to signal and this is moved signal to synthesis middle frequency difference exports one second receiver in the plurality of receiver in order to receive this;

One first separates modulating module, couple this second receiver module, this the first solution modulating module has one first setting frequency range, this first separate modulating module receive from this second receiver module this to synthesis middle frequency difference move signal, if this corresponds to this first setting frequency range to this first frequency range that synthesis middle frequency difference this first pair of middle frequency difference moved in signal moves signal, this first pair of middle frequency difference is moved signal receiving and becomes this first audio-visual input signal by this first solution modulating module; And

One second output module, couples this first solution modulating module, in order to export this first audio-visual input signal;

Wherein together, the plurality of receiver is connected in series together the plurality of conveyer serial connection, and this first conveyer is coupled to this first receiver by this transmission line.

13. audio/video transmission systems as claimed in claim 12, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this move signal to this first receiver to synthesis middle frequency difference for this first conveyer by one first pair of twisted-pair feeder of this transmission line.

14. audio/video transmission systems as claimed in claim 12, it is characterized in that, this first conveyer also includes a network signal receiver module, in order to receive a network signal and to transmit this network signal to this first output module, this network signal is sent to this first receiver by this transmission line.

15. audio/video transmission systems as claimed in claim 14, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this network signal to this first receiver for this first conveyer by one second pair of twisted-pair feeder of this transmission line and one the 3rd pair of twisted-pair feeder.

16. audio/video transmission systems as claimed in claim 14, it is characterized in that, this first receiver also includes a network signal output module, couples this second receiver module, in order to receive this network signal and to export outside to.

17. audio/video transmission systems as claimed in claim 12, it is characterized in that, this first conveyer also includes a control module, is coupled to this modulating module and this first output module, to send a control signal.

18. audio/video transmission systems as claimed in claim 17, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this control signal to this first receiver for this first conveyer by one the 4th pair of twisted-pair feeder of this transmission line.

19. audio/video transmission systems as claimed in claim 12, it is characterized in that, this first receiver also includes a signal transmission module, is coupled to this second receiver module, is sent to this second receiver in order to this is moved signal to synthesis middle frequency difference.

20. audio/video transmission systems as claimed in claim 19, it is characterized in that, this first receiver also includes a control module, is coupled to this signal transmission module and this first separates modulating module, to send a control signal.

21. audio/video transmission systems as claimed in claim 12, it is characterized in that, this second receiver comprises:

One the 3rd receiver module, couples this first receiver, moves signal in order to receive this to synthesis middle frequency difference;

One second separates modulating module, couple the 3rd receiver module, this the second solution modulating module has one second setting frequency range, this second separate modulating module receive from the 3rd receiver module this to synthesis middle frequency difference move signal, if this corresponds to this second setting frequency range to this first frequency range that synthesis middle frequency difference this first pair of middle frequency difference moved in signal moves signal, this first pair of middle frequency difference is moved signal receiving and becomes this first audio-visual input signal by this second solution modulating module; And

One the 3rd output module, couples this second solution modulating module, in order to receive this first audio-visual input signal from this second solution modulating module and to export this first audio-visual input signal.

22. audio/video transmission systems as claimed in claim 12, it is characterized in that, this first conveyer also includes a signal transmission module, be coupled to this second conveyer and this first output module, move signal in order to this second pair of middle frequency difference received from this second conveyer and reach this first output module.

23. audio/video transmission systems as claimed in claim 12, it is characterized in that, this second conveyer comprises:

One the 4th receiver module, in order to receive one second audio-visual input signal;

One second modulating module, couples the 4th receiver module, in order to by this second audio-visual input signal, this second pair of middle frequency difference be tuned as corresponding to this second frequency range moves signal; And

One the 4th output module, couples this second modulating module and this first conveyer, moves signal to this first conveyer in order to export this second pair of middle frequency difference.

24. audio/video transmission systems as claimed in claim 12, is characterized in that, also comprise:

One User's Interface, is arranged at this conveyer and/or this receiver, carries out operating or setting with for user.

25. 1 kinds of audio/video transmission systems, comprise:

Multiple conveyer, one first conveyer wherein in the plurality of conveyer comprises:

One first receiver module, in order to receive one first audio-visual input signal;

One first modulating module, couples this first receiver module, in order to by this first audio-visual input signal, the one first pair of middle frequency difference be tuned as corresponding to one first frequency range moves signal; And

One first output module, couple this first modulating module, in order to export a pair synthesis intermediate frequency differential wave, wherein this moves signal to synthesis middle frequency difference and comprises this first pair of middle frequency difference and move signal and correspond to one second pair of middle frequency difference of one second frequency range and move signal, and this second pair of middle frequency difference moves signal from one second conveyer in the plurality of conveyer;

One transmission line, couples this first output module, moves signal in order to transmit this to synthesis middle frequency difference; And

One receiver, comprises:

One second receiver module, couples this transmission line, moves signal in order to receive this to synthesis middle frequency difference;

One first separates modulating module, couple this second receiver module, this the first solution modulating module has one first setting frequency range, this first separate modulating module receive from this second receiver module this to synthesis middle frequency difference move signal, if this corresponds to this first setting frequency range to this first frequency range that synthesis middle frequency difference this first pair of middle frequency difference moved in signal moves signal, this first pair of middle frequency difference is moved signal receiving and becomes this first audio-visual input signal by this first solution modulating module; And

One second output module, couples this first solution modulating module, in order to export this first audio-visual input signal;

Wherein the plurality of conveyer serial connection together, and this first conveyer is coupled to this receiver by this transmission line.

26. audio/video transmission systems as claimed in claim 25, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this move signal to this receiver to synthesis middle frequency difference for this first conveyer by one first pair of twisted-pair feeder of this transmission line.

27. audio/video transmission systems as claimed in claim 25, it is characterized in that, this first conveyer also includes a network signal receiver module, in order to receive a network signal and to transmit this network signal to this first output module, this network signal is sent to this receiver by this transmission line.

28. audio/video transmission systems as claimed in claim 27, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this network signal to this receiver for this first conveyer by one second pair of twisted-pair feeder of this transmission line and one the 3rd pair of twisted-pair feeder.

29. audio/video transmission systems as claimed in claim 27, it is characterized in that, this receiver also includes a network signal output module, couples this second receiver module, in order to receive this network signal and to export outside to.

30. audio/video transmission systems as claimed in claim 25, it is characterized in that, this first conveyer also includes a control module, is coupled to this modulating module and this first output module, to send a control signal.

31. audio/video transmission systems as claimed in claim 30, it is characterized in that, this transmission line includes four pairs of twisted-pair feeders, transmits this control signal to this receiver for this first conveyer by one the 4th pair of twisted-pair feeder of this transmission line.

32. audio/video transmission systems as claimed in claim 25, it is characterized in that, this receiver also includes a control module, is coupled to this first solution modulating module, to send a control signal.

33. audio/video transmission systems as claimed in claim 25, it is characterized in that, this first conveyer also includes a signal transmission module, be coupled to this second conveyer and this first output module, move signal in order to this second pair of middle frequency difference received from this second conveyer and reach this first output module.

34. audio/video transmission systems as claimed in claim 25, it is characterized in that, this second conveyer comprises:

One the 3rd receiver module, in order to receive one second audio-visual input signal;

One second modulating module, couples the 3rd receiver module, in order to by this second audio-visual input signal, this second pair of middle frequency difference be tuned as corresponding to this second frequency range moves signal; And

One the 3rd output module, couples this second modulating module and this first conveyer, moves signal to this first conveyer in order to export this second pair of middle frequency difference.

35. audio/video transmission systems as claimed in claim 25, is characterized in that, also comprise:

One User's Interface, is arranged at this conveyer and/or this receiver, carries out operating or setting with for user.