CN208739307U - Video signal transmission system, transmitting terminal and receiving end - Google Patents
Video signal transmission system, transmitting terminal and receiving end Download PDFInfo
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- CN208739307U CN208739307U CN201821687693.6U CN201821687693U CN208739307U CN 208739307 U CN208739307 U CN 208739307U CN 201821687693 U CN201821687693 U CN 201821687693U CN 208739307 U CN208739307 U CN 208739307U
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Abstract
The utility model provides a kind of video signal transmission system, transmitting terminal and receiving end, the video signal transmission system includes: transmitting terminal and receiving end, by twisted pair line connection, the vision signal that the transmitting terminal is used to access passes through the Double-strand transmission to the receiving end for transmitting terminal and receiving end；Wherein, transmitting terminal includes sequentially connected first matching module, the first impedance transformation module and the first compensating module；The receiving end includes sequentially connected second compensating module, the second impedance transformation module and the second matching module.The utility model embodiment is proposed using twisted pair come remote transmission vision signal, and the processing such as corresponding impedance matching, differential conversion and compensation is carried out to it before and after Double-strand transmission, it can be achieved effective transmission of the vision signal in twisted pair, Signal Matching degree is good, strong interference immunity, low in cost etc..
Description
Technical field
The utility model relates to technical field of video transmission more particularly to a kind of video signal transmission system, transmitting terminal and
Receiving end.
Background technique
With the continuous development of video technique, the high quality demand of video is also being continuously improved in people, especially high definition
The demand of video.For guarantee high quality vision signal Lossless transport, as SDI (digital component serial line interface) vision signal,
AHD (simulation high definition) vision signal etc., presently mainly transmits unpressed digital video by coaxial cable.Due to same
Shaft cable has wrapped up the insulating materials, aluminium foil and metallic shield cable of a strata vinyl chloride in the outside of master core, in this way can be with
The interference for obstructing external environment, so that transmission quality can be improved.
However, but there are a variety of deficiencies in remote transmission in coaxial cable.For example, coaxial cable is expensive；Together
Shaft cable can not bear entanglement, pressure and severe bends, otherwise will damage inside cable structure, and then signal is prevented to pass
It is defeated；The volume of coaxial cable is big, occupies the big quantity space of light current well conduit, therefore often in the presence of being routed, cumbersome, wiring space is big
The problems such as.It is therefore proposed that a kind of can be significantly come the Transmission system transmitted at a distance instead of coaxial cable.
Utility model content
In view of the above problems, the utility model provides a kind of video signal transmission system to solve existing coaxial cable
Wiring difficulty in Video transmission system and it is at high cost the problems such as.
The utility model embodiment proposes a kind of video signal transmission system, comprising: transmitting terminal and receiving end, the transmission
With the receiving end by twisted pair line connection, the vision signal that the transmitting terminal is used to access is passed by the twisted pair at end
It is defeated to arrive the receiving end；
Wherein, the transmitting terminal includes sequentially connected first matching module, the first impedance transformation module and the first compensation
Module；The receiving end includes sequentially connected second compensating module, the second impedance transformation module and the second matching module.
In above-mentioned video signal transmission system, optionally, the transmitting terminal and the receiving end are respectively further comprised: defeated
Enter protective module and output protection module,
In the transmitting terminal, the input protective module connects the input terminal of first matching module, the output
Protective module connects the output end of first compensating module；
In the receiving end, the input protective module connects the input terminal of second compensating module, the output
Protective module connects the output end of second matching module.
In above-mentioned video signal transmission system, optionally, first matching module and second matching module
It is RC match circuit；
The RC match circuit includes first resistor, second resistance, 3rd resistor and first capacitor；Wherein, described first
The both ends of resistance are separately connected the first end of the 3rd resistor and the first end of first capacitor, the both ends point of the second resistance
The second end of the 3rd resistor and the second end of the first capacitor are not connected,
In the transmitting terminal, the both ends of the both ends of the 3rd resistor and the first capacitor are respectively described first
Input terminal and output end with module；
In the receiving end, the both ends of the both ends of the first capacitor and the 3rd resistor are respectively described second
Input terminal and output end with module.
In above-mentioned video signal transmission system, optionally, the first impedance transformation module and second impedance
Conversion module is balun impedance transducer,
Wherein, the impedance transformation ratio of the balun impedance transducer is the impedance ratio of the twisted pair and coaxial cable
Value.
In above-mentioned video signal transmission system, optionally, first compensating module and second compensating module
It is RC compensation circuit, the RC compensation circuit includes the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance, the second electricity
Hold and third capacitor；
Wherein, the first end of second capacitor and the first end of the 5th resistance are all connected with the of the 4th resistance
The first end of one end, the first end of the third capacitor and the 6th resistance is all connected with the first end of the 7th resistance；Institute
The second end of the second end connection third capacitor of the second capacitor is stated, the second end of the 5th resistance connects the second of the 6th resistance
End, the second end of second capacitor connect the second end of the 5th resistance and are grounded；
In the transmitting terminal, the first end of the first end of second capacitor and the third capacitor is first benefit
The input terminal of module is repaid, the second end of the 4th resistance and the second end of the 7th resistance are first compensating module
Output end；
In the receiving end, the second end of the 4th resistance and the second end of the 7th resistance are second benefit
Repay the input terminal of module, the first end of the first end of second capacitor and the third capacitor is second compensating module
Output end.
In above-mentioned video signal transmission system, optionally, the vision signal is sdi signal, AHD signal, TVI letter
Number, any one in HDTVI signal, CVI signal, HDCVI signal.
In above-mentioned video signal transmission system, optionally, the twisted pair is 100 ohm of shielded cables and 100 Europe
Any one in nurse unshielded cable.
In above-mentioned video signal transmission system, optionally, first protective module and second protective module
It include varistor and TVS diode.
Another embodiment of the utility model proposes a kind of transmitting terminal, is applied to video signal transmission system, the transmission
End includes sequentially connected matching module, impedance transformation module and compensating module；
The vision signal that the matching module is used to access carries out net mate；
The impedance transformation module is used to the vision signal after net mate carrying out impedance transformation and is converted into difference view
Frequency signal；
The compensating module is used to carry out impedance-compensated by the difference video signal and export.
The another embodiment of the utility model proposes a kind of receiving end, is applied to video signal transmission system, the reception
End includes sequentially connected compensating module, impedance transformation module and matching module；
The difference video signal from transmitting terminal that the compensating module is used to receive carries out impedance-compensated；
The impedance transformation module carries out impedance transformation for the difference video signal after will be impedance-compensated and is converted into list
Hold vision signal；
The matching module is used to the single-end video signals carrying out net mate and export.
Technical solution provided by the utility model has the following beneficial effects:
The utility model embodiment is proposed using twisted pair come remote transmission vision signal, and right before and after Double-strand transmission
It carries out the processing such as corresponding impedance matching, differential conversion and compensation, it can be achieved that effective biography of the vision signal in twisted pair
It is defeated, have the characteristics that good Signal Matching degree, strong interference immunity, low in cost.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the video signal transmission system of the utility model embodiment 1；
Fig. 2 is the first structural schematic diagram of the transmitting terminal of the video signal transmission system of the utility model embodiment 1；
Fig. 3 is the first structural schematic diagram of the receiving end of the video signal transmission system of the utility model embodiment 1；
Fig. 4 is the transmitting terminal of the video signal transmission system of the utility model embodiment 1 or second of structure of receiving end
Schematic diagram；
Fig. 5 is the third structural schematic diagram of the transmitting terminal of the video signal transmission system of the utility model embodiment 1；
Fig. 6 is the structural schematic diagram of the transmitting terminal of the utility model embodiment 2；
Fig. 7 is the structural schematic diagram of the receiving end of the utility model embodiment 3.
Main element symbol description:
1- video signal transmission system；10,300- transmitting terminal；20,300 '-receiving end；30- twisted pair；110- first
With module；120- the first impedance transformation module；The first compensating module of 130-；140- inputs protective module；150- output protection mould
Block；The second compensating module of 210-；220- the second impedance transformation module；The second matching module of 230-；310,310 '-matching module；
320,320 '-impedance transformation module；330,330 '-compensating module；R1- first resistor；R2- second resistance；R3- 3rd resistor；
The 4th resistance of R4；The 5th resistance of R5-；The 6th resistance of R6-；The 7th resistance of R7-；C1- first capacitor；The second capacitor of C2-；C3-
Three capacitors.
Specific embodiment
Hereinafter, the various embodiments of the disclosure will be described more fully.The disclosure can have various embodiments, and
It can adjust and change wherein.It should be understood, however, that: there is no disclosure protection scope is limited to specific reality disclosed herein
The intention of example is applied, but the disclosure should be interpreted as to all in the spirit and scope for covering the various embodiments for falling into the disclosure
Adjustment, equivalent and/or optinal plan.
Hereinafter, can the term " includes " used in the various embodiments of the disclosure or " may include " instruction disclosed in
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.In addition, such as existing
Used in the various embodiments of the disclosure, term " includes ", " having " and its cognate are meant only to indicate special characteristic, number
Word, step, operation, the combination of element, component or aforementioned item, and be understood not to exclude first one or more other
Feature, number, step, operation, element, component or aforementioned item combined presence or increase one or more features, number,
Step, operation, element, component or aforementioned item combination a possibility that.
The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified in various implementations
Various constituent element in example, but respective sets can not be limited into element.For example, the above statement is not intended to limit the suitable of the element
Sequence and/or importance.The above statement is only used for the purpose for differentiating an element and other elements.For example, the first user fills
It sets and indicates different user device with second user device, although the two is all user apparatus.For example, not departing from each of the disclosure
In the case where the range of kind embodiment, first element is referred to alternatively as second element, and similarly, second element is also referred to as first
Element.
It should also be noted that if a constituent element ' attach ' to another constituent element by description, it can be by the first composition member
Part is directly connected to the second constituent element, and " connection " third can form between the first constituent element and the second constituent element
Element.On the contrary, when a constituent element " being directly connected to " is arrived another constituent element, it will be appreciated that in the first constituent element
And second third constituent element is not present between constituent element.
The term used in the various embodiments of the disclosure is used only for the purpose of describing specific embodiments and not anticipates
In the various embodiments of the limitation disclosure.Unless otherwise defined, otherwise all terms used herein (including technical term and
Scientific term) there is contain identical with the various normally understood meanings of embodiment one skilled in the art of the disclosure
Justice.The term (term such as limited in the dictionary generally used) be to be interpreted as have in the related technical field
The identical meaning of situational meaning and Utopian meaning or meaning too formal will be interpreted as having, unless this
It is clearly defined in disclosed various embodiments.
Due to the strong antijamming capability of coaxial cable, old friends often transmit the letter such as high resolution video and audio using coaxial cable
Number to guaranteeing communication quality, it is contemplated that there are at high cost, wirings for a hfc transport system for transmitting at a distance
The problems such as difficult and occupied space is big, and twisted pair transmission system have many advantages, such as wiring easily, save space and low in cost, therefore originally
Utility model proposes a kind of to replace coaxial cable come transmission video signal using twisted pair.
However, using in Double-strand transmission signal process, especially high speed transmission of signals when, transmission line and signal source it
Between impedance whether match, will affect the transmission quality of signal, therefore, in order to ensure that vision signal can in transmission process have compared with
Good anti-interference ability, the utility model are each configured with transmitting terminal and the receiving end of symmetric design at the both ends of twisted pair, lead to
It crosses and the processing such as is matched, compensated to the vision signal of transmission front and back, vision signal caused by can eliminating because of connection transmission line
Reflection and extreme decaying on physical transmission path can also solve after transmission to increase the matching of vision signal
The problems such as distortion of picture.
Embodiment 1
Fig. 1 is please referred to, a kind of video signal transmission system 1 provided in this embodiment can be applied to the transmission of vision signal,
Especially remote transmission.The video signal transmission system 1 is matched by the vision signal transmitted to needs, difference modes turns
It a series of processing such as changes and compensates, make it have stronger system rejection to disturbance ability can effectively transmit in twisted pair, may be used also
Realize the seamless upgrade etc. with the transmission of existing coaxial cord.The video signal transmission system 1 is described in detail below.
As shown in Figure 1, the video signal transmission system 1 may include transmitting terminal 10, receiving end 20 and twisted pair 30, transmitting terminal
10 carry out transmission connection by twisted pair 30 with receiving end 20, and the vision signal that transmitting terminal 10 is used to access passes through twisted pair
30 are transferred to receiving end 20.
In the present embodiment, as shown in Figures 2 and 3, transmitting terminal 10 mainly include sequentially connected first matching module 110,
First impedance transformation module 120 and the first compensating module 130；And receiving end 20 then mainly includes sequentially connected second compensation mould
Block 210, the second impedance transformation module 220 and the second matching module 230.It is appreciated that the transmitting terminal 10 and receiving end 20 are distinguished
Positioned at twisted pair 30 both ends and the two have symmetrical structure.
Wherein, the first matching module 110 of transmitting terminal 10 is mainly used for the vision signal that will be accessed progress net mate, can
Eliminate reflection of the vision signal on physical transmission path and extreme decaying etc.；First impedance transformation module 120 is mainly used for
Vision signal after net mate is subjected to impedance transformation and is converted into difference video signal, so that the vision signal to be transmitted can
Meet Double-strand transmission characteristic；First compensating module 130 is mainly used for carrying out impedance-compensated by the difference video signal and export
Onto twisted pair 30, by twisted pair 30 should treated video signal transmission to receiving end 20.
Second compensating module 210 of receiving end 20 is mainly used for the difference video signal from transmitting terminal 10 that will be received
It carries out impedance-compensated；Second impedance transformation module 220 be mainly used for will be impedance-compensated after difference video signal carry out impedance turn
It changes and is converted into single-end video signals；Second matching module 230 is then mainly used for the single-end video signals carrying out net mate
And export, it is specifically output to corresponding video processing equipment or display equipment is medium.
In the present embodiment, the first matching module 110 and the second matching module 230 can circuit structures having the same, such as Fig. 4
Shown, RC match circuit can be used in first matching module 110 and the second matching module 230.Specifically, the RC match circuit
It may include first resistor R1, second resistance R2,3rd resistor R3 and first capacitor C1.The both ends of first resistor R1 are separately connected
The first end of three resistance R3 and the first end of first capacitor C1, the both ends of second resistance R2 are separately connected the second of 3rd resistor R3
The second end at end and first capacitor C1.
Wherein, in transmitting terminal 10, the both ends of 3rd resistor R3 and the both ends of first capacitor C1 are respectively the first matching mould
The input terminal and output end of block 110.In receiving end 20, the both ends of first capacitor C1 and the both ends of 3rd resistor R3 are respectively
The input terminal and output end of two matching modules 230.
It is appreciated that first matching module 110 and the second matching module 230 can be according to the different vision signals of access
The adjustment for carrying out the relevant parameter of RC match circuit, to allow to complete the matching feature of corresponding single-terminal network.It should
Understand, it is contemplated that the limitation of the capacity of a resistance value and capacitor of resistance, above-mentioned first resistor R1 or first capacitor C1
Deng actual number should not be construed as being only that a resistance or capacitor are constituted, other resistance and capacitor hereinafter referred to are same
Reason.
In the present embodiment, the first impedance transformation module 120 is mainly used for will be by single-ended after the matching of the first matching module 110
Vision signal is converted into difference video signal, and the second impedance transformation module 220 is mainly used for 210 impedance of the second compensating module
Compensated difference video signal is converted into single-end video signals.In the present embodiment, the first impedance transformation module 120 and second
Mutually isostructural balun converter can be used in impedance transformation module 220.
Wherein, the balun converter is also known as balun, be a kind of single-ended signal and double-end signal into
The converter of row conversion, is generally used for transmitting after single-ended signal is converted into differential signal, because differential signal can be preferable
Inhibit interference.It is of course also possible to which differential signal is converted into using balun converter to access other circuits after single-ended signal.
In the present embodiment, the balun converter is in addition to that can carry out vision signal to turn between single-ended mode and difference modes
It changes, is also used to the impedance transformation when mode conversion of two kinds of signals.In the present embodiment, the impedance transformation of the balun impedance transducer
Ratio can be the impedanoe ratio of twisted pair 30 and coaxial cable.Exemplarily, the characteristic impedance of common twisted pair 30 is 100 Europe
Nurse, and the characteristic impedance of common coaxial cable is 75 ohm, therefore the balun impedance that impedance transformation ratio is 1:0.75 can be used
Converter.
For example, by taking transmitting terminal 10 as an example, when vision signal is when carrying out being converted to difference modes by single-ended mode, impedance
With signal can be made not generate concussion on transmission line, phenomena such as radiation interference.Therefore in transmitting terminal 10, balun conversion
Vision signal can be converted into 100 ohm of differential impedance by device by 75 ohm of coaxial impedance, so that the vision signal can
With low-loss transmitted at a distance on twisted pair 30.
It is appreciated that the balun converter can be the balun converter that impedance transformation ratio is fixed as 1:0.75, it can also
To be the adjustable balun converter for including ratio for 1:0.75.
In the present embodiment, the first compensating module 130 and the second compensating module 210 can circuit structures having the same.Demonstration
Property, RC compensation circuit can be used in first compensating module 130 and the second compensating module 210.The RC compensation circuit may include
4th resistance R4, the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7, the second capacitor C2 and third capacitor C3.
Specifically, as shown in figure 4, the first end of the second capacitor C2 and the first end of the 5th resistance R5 are all connected with the 4th resistance
The first end of R4, the first end of third capacitor C3 and the first end of the 6th resistance R6 are all connected with the first end of the 7th resistance R7；The
The second end of the second end connection third capacitor C3 of two capacitor C2, the second end of the 5th resistance R5 connect the second of the 6th resistance R6
The second end at end, the second capacitor C2 connects second end and the ground connection of the 5th resistance R5.
Wherein, in transmitting terminal 10, the first end of the second capacitor C2 and the first end of third capacitor C3 are the first compensation mould
The input terminal of block 130, the second end of the 4th resistance R4 and the second end of the 7th resistance R7 are the output of the first compensating module 130
End.In receiving end 20, the second end of the second end of the 4th resistance R4 and the 7th resistance R7 are the input of the second compensating module 210
End, the first end of the second capacitor C2 and the first end of third capacitor C3 are the output end of the second compensating module 210.
In the present embodiment, which may include that (Serial Digital Interface, digital component are serial by SDI
Interface) signal, AHD (Analog High Definition simulates high definition) signal, TVI (Transport Video
Interface, video transmission interface) signal, HDTVI (High Definition Transport Video Interface,
HD video coffret) signal, CVI (Composite Video Interface, composite video interface) signal and HDCVI
(High Definition Composite Video Interface, high definition composite video interface) signal etc..Wherein, SDI
Signal is believed according to specific SD-SDI signal, HD-SDI signal, 3G-SDI signal and the 12G-SDI of being divided into of different transmission rates again
Number etc..
It is appreciated that transmitting terminal 10 and receiving end 20 all have the input interface and output interface of vision signal, to be used for
Access needs the vision signal transmitted and output treated vision signal.In the present embodiment, the input interface of transmitting terminal 10 and
The output interface of receiving end 20 can be same interface.Exemplarily, which may include but be not limited to as bnc connector, TNC
Connector, N Connector etc..Wherein, bnc connector, TNC connector and N Connector etc. are coaxial cable connector.
In the present embodiment, the output interface of transmitting terminal 10 and the input interface of receiving end 20 can be same interface.Exemplarily, this connects
Mouth may include the twisted pairs cable interface such as RJ-45 interface.
It is further preferred that the transmitting terminal 10 and/or receiving end 20 can also include protective module, for vision signal
Anti-surging and electrostatic protection when outputting and inputting.Exemplarily, as shown in figure 5, the protective module may include input protection mould
Block 140 and output protection module 150.Specifically, in transmitting terminal 10, input protective module 140 connects the first matching module 110
Input terminal, the output protection module 150 connect the first compensating module 130 output end.Similarly, in receiving end 20, input
Protective module 140 connects the input terminal of the second compensating module 210, and output protection module 150 connects the defeated of the second matching module 230
Outlet.
Exemplarily, the input protective module 140 and output protection module 150 can be by pressure-sensitive electricity in circuit in parallel
Resistance and TVS diode composition.Wherein, varistor can bear biggish surge current, and TVS diode is also known as transient voltage
Inhibit diode, when generating transient voltage in circuit, plays the role of shunting pressure limiting using avalanche theory moment, so as to protect
Shield load is not damaged.Inhibit to keep plus Anti-surging and electrostatic by the input and/or output in vision signal, it can be greatly
The adaptive capacity to environment and compatibility of signal are improved, and then can also better ensure that image transmitting quality.
In the present embodiment, which may include 100 ohm of shielded cables or 100 ohm of unshielded cables.It is exemplary
Ground, by taking 100 ohm of shielded cables as an example, which be can include but is not limited to as 5 classes 4 to 24AWG100 ohm of shielding electricity
Cable, 5 classes 4 are to 26AWG shielding flexible cord etc.；And for 100 ohm of unshielded cables, the twisted pair 30 can include but is not limited to for
Surpass 5 classes 4 to 24AWG unmasked flexible cord, 5 classes 4 to 24AWG unmasked flexible cord etc..
The video signal transmission system that the present embodiment proposes is hindered by the vision signal for transmitting coaxial cable by balun
The vision signal of single-ended transmission is converted into differential signal by anti-switch technology, so that it can be transmitted in twisted pair, while also logical
Overmatching circuit and compensation circuit etc. are handled, to eliminate reflection of the vision signal on physical transmission path and extreme decaying
Deng realizing the effective transmission of vision signal on the twisted-pair, have the characteristics that vision signal matching degree is good, strong interference immunity.
Further, Anti-surging and electrostatic inhibition protection also are increased in outputting and inputting for the Transmission system, video can be greatly improved
The adaptive capacity to environment and compatibility of signal, to better assure that image transmitting quality.In addition, passing through the utility model
Technical solution transmits high-definition video signal, and transmission range not only can solve multiple twin in practical engineering application up to 500 meters
Line transmits high-definition video signal apart from too short problem, also reduces the difficulty of wiring, greatly facilitates safety monitoring reality
Installation in.In addition, since the cost of twisted pair is far away from coaxial cable, and such as matching module, compensating module are equal
It is made of the cheap device such as capacitor and resistance, which also has many advantages, such as low in cost.
Embodiment 2
Fig. 6 is please referred to, the present embodiment proposes that a kind of transmitting terminal 300 can be applied to video signal transmission system, the transmitting terminal
300 with above-described embodiment 1 in the structure and function having the same of transmitting terminal 10.Specifically, which may include successively
Matching module 310, impedance transformation module 320 and the compensating module 330 of connection.
Wherein, the vision signal that matching module 310 is used to access carries out net mate.
Impedance transformation module 320 is used to the vision signal after net mate carrying out impedance transformation and is converted into differential video
Signal.
Compensating module 330 is used to carry out impedance-compensated by the difference video signal and export.
It is further preferred that the transmitting terminal 300 can also include protective module, which can be used for inputting in signal
Anti-surging and electrostatic protection are carried out when with output.
Exemplarily, which may include input protective module and output protection module, wherein input protective module
The input terminal of matching connection module 310, the Anti-surging and electrostatic protection that can be used for when vision signal access；Output protection module can
The output end for connecting compensating module 330, the Anti-surging and electrostatic protection that can be used for when signal output.
The transmitting terminal 300 of the present embodiment corresponds to the transmitting terminal 10 in the video signal transmission system 1 of above-described embodiment 1,
The option of above-described embodiment 1 is equally applicable to the present embodiment, therefore this will not be detailed here.
Embodiment 3
Fig. 7 is please referred to, the present embodiment proposes that a kind of receiving end 300 ' can be applied to video signal transmission system, the receiving end
300 ' with above-described embodiment 1 in the structure and function having the same of receiving end 20.Specifically, the receiving end 300 ' may include according to
Compensating module 330 ', impedance transformation module 320 ' and the matching module 310 ' of secondary connection.
Wherein, the difference video signal from transmitting terminal that compensating module 330 ' is used to receive carries out impedance-compensated.
Impedance transformation module 320 ' carries out impedance transformation for the difference video signal after will be impedance-compensated and is converted into list
Hold vision signal；
Matching module 310 ' is used to the single-end video signals carrying out net mate and export.
It is appreciated that the transmitting terminal 300 of the receiving end 300 ' and above-described embodiment 2 has symmetrical structure.The present embodiment
Receiving end 300 ' correspond to above-described embodiment 1 video signal transmission system 1 in receiving end 20, above-described embodiment 1 it is optional
Item is equally applicable to the present embodiment, therefore this will not be detailed here.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the utility model.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Above-mentioned the utility model serial number is for illustration only, does not represent the superiority and inferiority of implement scene.Disclosed above is only this
Several specific implementation scenes of utility model, still, the utility model is not limited to this, any those skilled in the art's energy
Think of variation should all fall into the protection scope of the utility model.
Claims (10)
1. a kind of video signal transmission system characterized by comprising transmitting terminal and receiving end, the transmitting terminal connect with described
By twisted pair line connection, the vision signal that the transmitting terminal is used to access is connect described in receiving end by the Double-strand transmission
Receiving end；
Wherein, the transmitting terminal includes sequentially connected first matching module, the first impedance transformation module and the first compensating module；
The receiving end includes sequentially connected second compensating module, the second impedance transformation module and the second matching module.
2. video signal transmission system according to claim 1, which is characterized in that the transmitting terminal and the receiving end are also
Respectively include: input protective module and output protection module,
In the transmitting terminal, the input protective module connects the input terminal of first matching module, the output protection
Module connects the output end of first compensating module；
In the receiving end, the input protective module connects the input terminal of second compensating module, the output protection
Module connects the output end of second matching module.
3. video signal transmission system according to claim 1, which is characterized in that first matching module and described
Two matching modules are RC match circuit；
The RC match circuit includes first resistor, second resistance, 3rd resistor and first capacitor；Wherein, the first resistor
Both ends be separately connected the first end of the 3rd resistor and the first end of first capacitor, the both ends of the second resistance connect respectively
The second end of the 3rd resistor and the second end of the first capacitor are connect,
In the transmitting terminal, the both ends of the both ends of the 3rd resistor and the first capacitor are respectively the first matching mould
The input terminal and output end of block；
In the receiving end, the both ends of the both ends of the first capacitor and the 3rd resistor are respectively the second matching mould
The input terminal and output end of block.
4. video signal transmission system according to claim 1, which is characterized in that the first impedance transformation module and institute
Stating the second impedance transformation module is balun impedance transducer,
Wherein, the impedance transformation ratio of the balun impedance transducer is the impedanoe ratio of the twisted pair and coaxial cable.
5. video signal transmission system according to claim 1, which is characterized in that first compensating module and described
Two compensating modules are RC compensation circuit,
The RC compensation circuit includes the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance, the second capacitor and third electricity
Hold；Wherein, the first end of second capacitor and the first end of the 5th resistance are all connected with the first end of the 4th resistance,
The first end of the third capacitor and the first end of the 6th resistance are all connected with the first end of the 7th resistance；Described second
The second end of the second end connection third capacitor of capacitor, the second end of the 5th resistance connect the second end of the 6th resistance, institute
The second end for stating the second capacitor connects the second end of the 5th resistance and is grounded；
In the transmitting terminal, the first end of the first end of second capacitor and the third capacitor is the first compensation mould
The input terminal of block, the second end of the 4th resistance and the second end of the 7th resistance are the output of first compensating module
End；
In the receiving end, the second end of the 4th resistance and the second end of the 7th resistance are the second compensation mould
The first end of the input terminal of block, the first end of second capacitor and the third capacitor is the output of second compensating module
End.
6. video signal transmission system according to claim 1, which is characterized in that the vision signal be sdi signal,
AHD signal, TVI signal, HDTVI signal, CVI signal, any one in HDCVI signal.
7. video signal transmission system according to claim 1, which is characterized in that the twisted pair is 100 ohm of shieldings
Any one in cable and 100 ohm of unshielded cables.
8. video signal transmission system according to claim 2, which is characterized in that the input protective module and described defeated
Protective module includes varistor and TVS diode out.
9. a kind of transmitting terminal, which is characterized in that be applied to video signal transmission system, the transmitting terminal includes sequentially connected
With module, impedance transformation module and compensating module；
The vision signal that the matching module is used to access carries out net mate；
The impedance transformation module is used to the vision signal after net mate carrying out impedance transformation and is converted into differential video letter
Number；
The compensating module is used to carry out impedance-compensated by the difference video signal and export.
10. a kind of receiving end, which is characterized in that be applied to video signal transmission system, the receiving end includes sequentially connected
Compensating module, impedance transformation module and matching module；
The difference video signal from transmitting terminal that the compensating module is used to receive carries out impedance-compensated；
The impedance transformation module carries out impedance transformation for the difference video signal after will be impedance-compensated and is converted into single-ended view
Frequency signal；
The matching module is used to the single-end video signals carrying out net mate and export.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821687693.6U CN208739307U (en) | 2018-10-17 | 2018-10-17 | Video signal transmission system, transmitting terminal and receiving end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821687693.6U CN208739307U (en) | 2018-10-17 | 2018-10-17 | Video signal transmission system, transmitting terminal and receiving end |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110519425A (en) * | 2019-08-20 | 2019-11-29 | 华勤通讯技术有限公司 | A kind of antenna assembly of terminal device |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110519425A (en) * | 2019-08-20 | 2019-11-29 | 华勤通讯技术有限公司 | A kind of antenna assembly of terminal device |
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