CN109905625A - A kind of signal transmission system - Google Patents
A kind of signal transmission system Download PDFInfo
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- CN109905625A CN109905625A CN201910137285.6A CN201910137285A CN109905625A CN 109905625 A CN109905625 A CN 109905625A CN 201910137285 A CN201910137285 A CN 201910137285A CN 109905625 A CN109905625 A CN 109905625A
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- signal
- decoder
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- encoder
- signal transmission
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Abstract
The invention discloses a kind of signal transmission system, including transmitter and receiver, the transmitter includes the first encoder, second encoder and the first port RJ45；First encoder and the second encoder are all connected to the first port RJ45；The receiver includes the 2nd port RJ45, the first decoder, the second decoder, Scaler chip and USB interface expander；2nd port RJ45 is connected to first decoder and second decoder；The Scaler chip is connected to first decoder；The USB interface expander is connected to second decoder；First port RJ45 is connected with the 2nd port RJ45 by cable.The signal transmission system can be realized the data communication of long range, and powerful noise resisting ability is provided for the data communication of long range, can effectively reduce signal interference, improve signal transmission quality.
Description
Technical field
The present invention relates to signal transmission technology field, in particular to a kind of signal transmission system.
Background technique
Currently, carrying out letter again after usually amplifying processing to VGA signal using VGA amplifier when carrying out signal transmission
Number transmission.As the diameter of VGA cable is more and more thicker, when the distance of signal transmission is longer, VGA cable fracture, water can be generated
The wiring hidden danger such as the welding is not firm for crystal-tipped, rosin joint.And some of which cable also needs specific customization, to seriously affect it
Applicability.In addition, though VGA amplifier is exaggerated VGA signal, but the crosstalk signal inside VGA cable can be more next
Bigger, when long distance transmission, has that signal is obvious weak, has been unable to satisfy the demand of signal transmission distance and quality.
Therefore, how a kind of signal transmission system is provided, improves signal transmission distance and quality is those skilled in the art
Technical problem urgently to be resolved.
Summary of the invention
The object of the present invention is to provide a kind of signal transmission systems, can effectively improve signal transmission quality and transmission distance
From.
In order to solve the above technical problems, the present invention provides a kind of signal transmission system, including transmitter and receiver, institute
Stating transmitter includes the first encoder, second encoder and the first port RJ45, to be believed VGA by first encoder
Number it is converted into the first differential signal, the second differential signal is converted for usb signal by the second encoder；Described first compiles
Code device and the second encoder are all connected to the first port RJ45；The receiver include the 2nd port RJ45, first
Decoder, the second decoder, Scaler chip and USB interface expander；2nd port RJ45 is connected to described
First decoder and second decoder, it is described to be reduced to first differential signal by first decoder
Second differential signal is reduced to the usb signal by second decoder by VGA signal；The Scaler chip
It is connected to first decoder, to pass through the Scaler chip for the VGA signal after first decoder reduction
It is converted into LVDS signal；The USB interface expander is connected to second decoder；First port RJ45 and described the
Two ports RJ45 are connected by cable.
Optionally, the cable is CAT6 cable or CAT5 cable.
Optionally, first encoder is AD8147 type differential driver.
Optionally, first decoder is AD8143 type differential driver or AD8145 type differential driver.
Optionally, the second encoder is NS1021 chip.
Optionally, second decoder is NS1021 chip.
Optionally, the Scaler chip is NT68760HUFG chip.
Signal transmission system provided by the present invention, including transmitter and receiver, the transmitter include the first coding
Device, second encoder and the first port RJ45, to convert the first difference letter for VGA signal by first encoder
Number, the second differential signal is converted for usb signal by the second encoder；First encoder and second coding
Device is all connected to the first port RJ45；The receiver include the 2nd port RJ45, the first decoder, the second decoder,
Scaler chip and USB interface expander；2nd port RJ45 is connected to first decoder and described the
Two decoders pass through described second so that first differential signal is reduced to the VGA signal by first decoder
Second differential signal is reduced to the usb signal by decoder；The Scaler chip is connected to first decoder,
To convert LVDS signal for the VGA signal after first decoder reduction by the Scaler chip；The USB
Interface Extender is connected to second decoder；First port RJ45 passes through cable phase with the 2nd port RJ45
Even.
Transmitter is connected with receiver by single cable, utilizes transmission by signal transmission system provided by the present invention
Encoder and the decoder of receiver of device etc. carry out signal processing, can be by the transmission of the VGA picture of host and USB2.0 signal
Distance extends up to 60 meters, effectively breaches the limitation of 5 meters of traditional transmission ranges, and provides for the data communication of long range powerful
Noise resisting ability, reduce signal interference, improve signal transmission quality, better meet signal transmission demand.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of schematic diagram of signal transmission system provided by the embodiment of the present invention；
Fig. 2 is the schematic illustration of the first encoder provided by the embodiment of the present invention；
Fig. 3 is the schematic illustration of second encoder provided by the embodiment of the present invention；
Fig. 4 is the schematic illustration of the first decoder provided by the embodiment of the present invention；
Fig. 5 is the schematic illustration of Scaler chip provided by the embodiment of the present invention；
Fig. 6 is the schematic illustration of the second decoder provided by the embodiment of the present invention and USB interface expander.
Specific embodiment
Core of the invention is to provide a kind of signal transmission system, can effectively improve signal transmission quality and transmission distance
From.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is the schematic diagram of signal transmission system provided by the embodiment of the present invention；With reference to Fig. 1 it is found that
The signal transmission system includes: transmitter 10 and receiver 20, and transmitter 10 includes the first encoder 101, second encoder
102 and the first the port RJ45 103 to convert the first differential signal for VGA signal by the first encoder 101 pass through
Usb signal is converted the second differential signal by two encoders 102；First encoder 101 and second encoder 102 are all connected to the
One port RJ45 103；Receiver 20 includes the 2nd port RJ45 201, the first decoder 202, the second decoder 203, Scaler
Chip 204 and USB interface expander 205；2nd port RJ45 201 is connected to the first decoder 202 and the second decoding
Device 203, first differential signal is reduced to VGA signal by the first decoder 202, by the second decoder 203 by second
Differential signal is reduced to usb signal；Scaler chip 204 is connected to the first decoder 202, will to pass through Scaler chip 204
VGA signal after the reduction of first decoder is converted into LVDS signal；USB interface expander 205 is connected to the second decoder 203；
First port RJ45 103 is connected with the 2nd port RJ45 201 by cable.
Specifically, transmitter 10 can be connected with host side, via the VGA signal at VGA connector receiving host end, and can lead to
It crosses the first encoder 101 and converts the first differential signal for the VGA signal of host side；Pass through USB2.0 interface host side
Usb signal, and the second differential signal can be converted by the usb signal of host side by second encoder 102.Further, it sends
Device 10 by after conversion the first differential signal and the second differential signal from the first port RJ45 103 be sent to receiver 20.
Wherein, the cable for connecting the first port RJ45 103 and the 2nd port RJ45 201 can be category-5 cable, can also be
Six class lines etc., for its concrete type, the present invention does not do unique restriction, can carry out otherness setting according to actual needs.
Optionally, above-mentioned cable is CAT6 cable or CAT5 cable.
Specifically, in view of CAT6, CAT5 cable, i.e. six class cables and five class cables have signal transmission frequencies and rate
The characteristics such as higher, therefore, in the present embodiment, connection transmitter 10 and receiver 20 cable specifically can be used CAT6 cable or
CAT5 cable, to realize that the data efficient between transmitter 10 and receiver 20 transmits by the CAT6 cable or CAT5 cable.
In addition, the present invention is equally not specifically limited, according to actual needs for the concrete type of the first encoder 101
Carry out adaptable setting.
Optionally, the first encoder 101 is AD8147 type differential driver.
Specifically, the first encoder is specially AD8147 type differential driver in the present embodiment, to pass through the AD8147
The VGA signal of host side is converted the first differential signal by type differential driver, so by the first port RJ45 103 by this
One differential signal is sent to receiver 20.Wherein, the connection relationship of the AD8147 type differential driver is as shown in Figure 2.
Receiver 20 can be connected with display screen, and the first differential signal sent for receiver transmitter 10 and the second difference are believed
Number, and the first differential signal is reduced to VGA signal and VGA signal is further converted to LVDS signal；By the second difference
Signals revivification is usb signal.Specifically, receiving the first differential signal that transmitting terminal 10 is sent by the 2nd port RJ45 201
With the second differential signal, and first differential signal is reduced to VGA signal using the first decoder 202, and by the VGA after reduction
Signal is exported to Scaler chip 204；Scaler chip 204 then further converts LVDS signal for the VGA signal after reduction
It is used for display screen.Second decoder 203 is then responsible for the second differential signal being reduced to usb signal, and by usb signal export to
USB interface expander 205, so that any USB interface by the USB interface expander 205 can obtain usb signal.For
The concrete type of first decoder 202, the second decoder 203 and Scaler chip 204, the present invention do not do unique limit equally
It is fixed, it is arranged according to actual needs.
Optionally, the first decoder 202 is AD8143 type differential driver or AD8145 type differential driver.
Specifically, referring to FIG. 3, in the present embodiment, the first decoder 202 concretely AD8143 type differential driver or
AD8145 type differential driver.2nd port RJ45 201 is driven by the first differential signal transmission received to AD8143 type difference
After dynamic device or AD8145 type differential driver, AD8143 type differential driver or AD8145 type differential driver can be poor to first
Sub-signal is decoded processing, the first differential signal is reduced to VGA signal, and further output this to Scaler chip
204, carry out subsequent processing.The connection type of first decoder 202 is shown referring to figure 3..
Optionally, second encoder 102 is NS1021 chip.
Specifically, passing through NS1021 core referring to FIG. 4, second encoder specifically uses NS1021 chip in the present embodiment
Piece carries out coding and signal enhancing processing etc. to usb signal.The specific connection circuit of second encoder 102 is referring to figure 4..
Further, optionally, the second decoder 203 is NS1021 chip.
Specifically, referring to FIG. 5, the second decoder 203 is corresponding with second encoder 102, for that will encode through second
The second differential signal is reduced to usb signal after device 102 converts.In the present embodiment, the second decoder 203 specifically selects NS1021 core
Piece is realized with being decoded processing etc. to the second differential signal received by this NS1021 chip by the second differential signal
It is reduced to the purpose of usb signal.The connection circuit of second decoder 203 is referring to figure 5..
Optionally, Scaler chip 204 is NT68760HUFC chip.
Specifically, please referring in Fig. 6 the present embodiment, Scaler chip 204 is specifically chosen NT68760HUFG chip, with benefit
LVGA signal is converted by the VGA signal after reduction with the NT68760HUFG chip to use for display screen.Scaler chip 204
Connection circuit please refer to Fig. 6.
In conclusion transmitter, is connected by signal transmission system provided by the present invention by single cable with receiver,
Signal processing is carried out using encoder of transmitter and receiver etc., it can be by the VGA picture of host and the transmission range of usb signal
Extend up to 60 meters, effectively breaches the limitation of 5 meters of traditional transmission ranges, and provide powerful resist for the data communication of long range
Noise immune reduces signal interference, improves signal transmission quality, better meets signal transmission demand.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.
Signal transmission system provided by the present invention is described in detail above.Specific case pair used herein
The principle of the present invention and embodiment are expounded, method of the invention that the above embodiments are only used to help understand
And its core concept.It should be pointed out that for those skilled in the art, before not departing from the principle of the invention
It puts, can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the guarantor of the claims in the present invention
Protect range.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also other elements including being not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or equipment for including element.
Claims (7)
1. a kind of signal transmission system, which is characterized in that including transmitter and receiver, the transmitter includes the first coding
Device, second encoder and the first port RJ45, to convert the first difference letter for VGA signal by first encoder
Number, the second differential signal is converted for usb signal by the second encoder；First encoder and second coding
Device is all connected to the first port RJ45；The receiver include the 2nd port RJ45, the first decoder, the second decoder,
Scaler chip and USB interface expander；2nd port RJ45 is connected to first decoder and described the
Two decoders pass through described second so that first differential signal is reduced to the VGA signal by first decoder
Second differential signal is reduced to the usb signal by decoder；The Scaler chip is connected to first decoder,
To convert LVDS signal for the VGA signal after first decoder reduction by the Scaler chip；The USB
Interface Extender is connected to second decoder；First port RJ45 passes through cable phase with the 2nd port RJ45
Even.
2. signal transmission system according to claim 1, which is characterized in that the cable is CAT6 cable or CAT5 net
Line.
3. signal transmission system according to claim 2, which is characterized in that first encoder is AD8147 type difference
Driver.
4. signal transmission system according to claim 3, which is characterized in that first decoder is AD8143 type difference
Driver or AD8145 type differential driver.
5. signal transmission system according to claim 4, which is characterized in that the second encoder is NS1021 chip.
6. signal transmission system according to claim 5, which is characterized in that second decoder is NS1021 chip.
7. signal transmission system according to claim 5, which is characterized in that the Scaler chip is NT68760HUFG
Chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137285.6A CN109905625A (en) | 2019-02-25 | 2019-02-25 | A kind of signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137285.6A CN109905625A (en) | 2019-02-25 | 2019-02-25 | A kind of signal transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109905625A true CN109905625A (en) | 2019-06-18 |
Family
ID=66945411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910137285.6A Pending CN109905625A (en) | 2019-02-25 | 2019-02-25 | A kind of signal transmission system |
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Citations (5)
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|---|---|---|---|---|
| CN101094376A (en) * | 2006-06-23 | 2007-12-26 | Rgb系统公司 | Method and apparatus for automatic compensation of video signal losses from transmission over conductors |
| CN202334778U (en) * | 2011-12-12 | 2012-07-11 | 海能电子(深圳)有限公司 | High-definition multimedia interface (HDMI) optical fiber transmission device |
| US20160050386A1 (en) * | 2014-08-15 | 2016-02-18 | Quality Manufactured Accessories Inc. | Transport of analog video signals via digital video cables |
| CN205622758U (en) * | 2016-01-19 | 2016-10-05 | 周明捷 | A controlling means for transmission of main frame interface signals |
| CN207652571U (en) * | 2017-12-17 | 2018-07-24 | 苏州视泰克电子科技有限公司 | A kind of hundred meter level HDMI high definition cable extenders |
-
2019
- 2019-02-25 CN CN201910137285.6A patent/CN109905625A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101094376A (en) * | 2006-06-23 | 2007-12-26 | Rgb系统公司 | Method and apparatus for automatic compensation of video signal losses from transmission over conductors |
| CN202334778U (en) * | 2011-12-12 | 2012-07-11 | 海能电子(深圳)有限公司 | High-definition multimedia interface (HDMI) optical fiber transmission device |
| US20160050386A1 (en) * | 2014-08-15 | 2016-02-18 | Quality Manufactured Accessories Inc. | Transport of analog video signals via digital video cables |
| CN205622758U (en) * | 2016-01-19 | 2016-10-05 | 周明捷 | A controlling means for transmission of main frame interface signals |
| CN207652571U (en) * | 2017-12-17 | 2018-07-24 | 苏州视泰克电子科技有限公司 | A kind of hundred meter level HDMI high definition cable extenders |
Non-Patent Citations (3)
| Title |
|---|
| 任君: "高清视频VGA模拟差分信号的远距离传输系统设计", 《光学技术》 * |
| 刘广法: "基于TMDS差分技术的VGA长线传输系统研究与设计", 《计算机工程与设计》 * |
| 时仲盟: "基于FPGA 的8 路VGA 长线传输系统设计", 《计算机与现代化》 * |
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Application publication date: 20190618 |
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