CN107666579B - Long-distance video transmission display equipment - Google Patents
Long-distance video transmission display equipment Download PDFInfo
- Publication number
- CN107666579B CN107666579B CN201610602942.6A CN201610602942A CN107666579B CN 107666579 B CN107666579 B CN 107666579B CN 201610602942 A CN201610602942 A CN 201610602942A CN 107666579 B CN107666579 B CN 107666579B
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- circuit
- vga
- tdms
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- connector
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 230000002708 enhancing Effects 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000002238 attenuated Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003068 static Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43632—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
Abstract
The invention discloses a long-distance video transmission display device, which comprises: the device comprises a TDMS decoding circuit, a high-speed DAC (digital-to-analog converter) circuit, a VGA drive enhancing circuit, an HDMI (high-definition multimedia interface) connector and a VGA interface connector; the HDMI connector is connected with the TDMS decoding circuit, the TDMS decoding circuit is connected with the VGA drive enhancing circuit, and the VGA drive enhancing circuit is connected with the VGA interface connector; HDMI digital video signals are input to the long-distance video transmission display device through an HDMI connector, the TDMS decoding circuit is used for decoding and converting the input HDMI digital video signals into TTL signals, the high-speed DAC conversion circuit is used for encoding the TTL signals to generate standard analog video signals, then the analog video signals are output to the VGA drive enhancement circuit, the VGA drive enhancement circuit is used for enhancing the analog video signals, and the VGA interface connector is used for outputting the analog video signals output by the VGA drive enhancement circuit.
Description
Technical Field
The invention relates to a video signal processing device, in particular to a long-distance analog video signal transmission display device.
Background
The existing video signals are transmitted through analog signals, the transmission interference resistance of the analog signals is weak, the transmission distance is short, the image quality is fuzzy, the requirement on a medium on which the transmission depends is high, and the transmission cost is high. However, in some applications, it is necessary to transmit analog video signals over long distances and display the video signals at remote locations for related monitoring and operation. The traditional analog signal video line is connected with a signal source and a display end, the analog signal is attenuated in the transmission process, and finally displayed video pictures are blurred and distorted or even can not be displayed, so how to convert the conventional analog video signal into the long-distance video transmission display technology which can realize long-distance transmission and has stronger anti-jamming capability becomes necessary for the application occasions.
Disclosure of Invention
The invention aims to provide long-distance video transmission display equipment which is used for solving the problems that the traditional analog signal transmission has weak anti-interference capability and short transmission distance and cannot realize long-distance video transmission display.
The invention discloses a long-distance video transmission display device, which comprises: the device comprises a TDMS decoding circuit, a high-speed DAC (digital-to-analog converter) circuit, a VGA drive enhancing circuit, an HDMI (high-definition multimedia interface) connector and a VGA interface connector; the HDMI connector is connected with the TDMS decoding circuit, the TDMS decoding circuit is connected with the VGA drive enhancing circuit, and the VGA drive enhancing circuit is connected with the VGA interface connector; HDMI digital video signals are input to the long-distance video transmission display device through an HDMI connector, the TDMS decoding circuit is used for decoding and converting the input HDMI digital video signals into TTL signals, the high-speed DAC conversion circuit is used for encoding the TTL signals to generate standard analog video signals, then the analog video signals are output to the VGA drive enhancement circuit, the VGA drive enhancement circuit is used for enhancing the analog video signals, and the VGA interface connector is used for outputting the analog video signals output by the VGA drive enhancement circuit.
The DVI coding circuit is connected with the output end of the TDMS decoding circuit and is used for coding the TTL signal of the TDMS decoding circuit to generate a standard DVI digital video signal; and the DVI interface connector is used for outputting the DVI digital video signals of the DVI coding circuit.
An embodiment of the long-distance video transmission display device according to the invention further comprises a power module for supplying power to the TDMS decoding circuit.
In an embodiment of the long-distance video transmission display device according to the present invention, the power module includes: the direct current power connector is used for connecting external direct current; the DC-DC power supply module converts external direct current into 5V voltage for output, and the power supply conversion chip converts the 5V voltage of the DC-DC power supply module into 3.3V voltage for output to the TDMS decoding circuit.
An embodiment of the long-distance video transmission display device according to the present invention further includes: and the interface protection circuit is connected between the HDMI connector and the TDMS decoding circuit and is used for performing noise interference prevention and electrostatic protection on the HDMI digital video signal.
An embodiment of the long-distance video transmission display device according to the present invention further includes: the VGA interface protection circuit is connected between the VGA drive enhancement circuit and the VGA interface connector and is used for performing noise interference prevention and electrostatic protection on VGA analog video signals.
An embodiment of the long-distance video transmission display device according to the present invention further includes: DVI interface protection circuit, connect between DVI encoder circuit and DVI interface connector.
In an embodiment of the long-distance video transmission display device according to the invention, a power protection circuit is connected between the DC power connector and the DC-DC power module for protecting the circuit from reverse impact.
In an embodiment of the long-distance video transmission display device according to the invention, the VGA drive boost circuit has a maximum bandwidth of 210 MHz.
According to an embodiment of the long-distance video transmission display device of the present invention, the TDMS decoding circuit decodes and converts the HDMI digital video signal into 24 parallel TTL signals.
In summary, the long-distance video transmission display device of the invention realizes that after a series of operations such as decoding, encoding, interface protection and the like are performed on a digital video signal input by a signal source, a path of digital video signal and a path of analog video signal capable of being transmitted in a long distance are finally displayed and output, and solves the problems that the traditional video signals are transmitted by analog signals, the analog signal transmission has weak anti-interference capability, the transmission distance is short, and the long-distance video transmission display cannot be realized.
Drawings
Fig. 1 is a block diagram of a long-distance video transmission display device according to the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Fig. 1 is a block diagram of a long-distance video transmission display device according to the present invention, and as shown in fig. 1, a long-distance video transmission display device according to the present invention includes a TDMS decoding circuit 1, a DVI encoding circuit 2, a high-speed DAC conversion circuit 3, a VGA drive enhancement circuit 4, a DC-DC power supply module 5, a power conversion chip 6, an interface protection circuit 7, a DVI interface protection circuit 8, a VGA interface protection circuit 9, a power protection circuit 10, an HDMI connector 11, a DVI interface connector 12, a VGA interface connector 13, and a DC power supply connector 14.
As shown in figure 1, the TDMS decoding circuit 1 is connected with the DVI coding circuit 2 through a data bus, the TDMS decoding circuit 1 is connected with the high-speed DAC conversion circuit 3 through a data bus, the TDMS decoding circuit 1 is connected with the interface protection circuit 7, the HDMI connector 11 is connected with the interface protection circuit 7, the DVI coding circuit 2 is connected with the DVI interface protection circuit 8, the DVI interface connector 12 is connected with the DVI interface protection circuit 8, the high-speed DAC conversion circuit 3 is connected with the VGA driving enhancement circuit 4 through a data bus, the VGA driving enhancement circuit 4 is connected with the VGA interface protection circuit 9, the VGA interface connector 13 is connected with the VGA interface protection circuit 9, the DC power connector 14 is connected with the power protection circuit 10, the DC-DC power module 5 is connected with the power protection circuit 10, the power conversion chip 6 is connected with the DC-DC power module 5, and the DC-DC power module 5 is respectively connected with the power conversion chip, The DVI coding circuit 2 is connected with the VGA driving enhancement circuit 4, and the power conversion chip 6 is connected with the TDMS decoding circuit 1 and the high-speed DAC conversion circuit 3.
As shown in FIG. 1, the working process of the long-distance video transmission display device is briefly described, after the long-distance video transmission display device is powered on, external direct current is input to a DC-DC power supply module 5 through a direct current power supply connector 14 and a power protection circuit 10 (the protection circuit can be subjected to reverse impact), the DC-DC power supply module 5 converts the external direct current into 5V voltage for output, the 5V voltage is supplied to a power conversion chip 6, a DVI coding circuit 2 and a VGA drive enhancing circuit 4, the power conversion chip 6 converts the 5V voltage into 3.3V voltage for output, the 3.3V voltage is supplied to a TDMS decoding circuit 1 and a high-speed DAC connector conversion circuit 3, after the chip is powered on, HDMI digital video signals are input to the TDMS decoding circuit 1 through an HDMI connector 11 and an interface protection circuit 7 (which perform noise interference prevention and static protection on HDMI digital video signals, namely, through filtering and enhancing the anti-interference ability) and are input to the TDMS decoding circuit 1, the TDMS decoding circuit 1 which decodes and converts the HDMI digital video signals into 24-way parallel signals, the HDMI signals which are generated by a high-speed VGA signal processing circuit, a high-frequency-up converter, a high-up converter, a high-up converter circuit is used for high-up converter, a.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A long-range video transmission display device, comprising: the device comprises a TDMS decoding circuit, a high-speed DAC (digital-to-analog converter) circuit, a VGA drive enhancing circuit, an HDMI (high-definition multimedia interface) connector and a VGA interface connector;
the HDMI connector is connected with the TDMS decoding circuit, the TDMS decoding circuit is connected with the VGA drive enhancing circuit, and the VGA drive enhancing circuit is connected with the VGA interface connector;
the HDMI digital video signal is input to the long-distance video transmission display device through the HDMI connector, the TDMS decoding circuit is used for decoding and converting the input HDMI digital video signal into a TTL signal, the high-speed DAC conversion circuit is used for encoding the TTL signal to generate a standard analog video signal, then the analog video signal is output to the VGA drive enhancement circuit, the VGA drive enhancement circuit is used for enhancing the analog video signal, and the VGA interface connector is used for outputting the analog video signal output by the VGA drive enhancement circuit;
external direct current is input to the DC-DC power supply module through the direct current power supply connector, the DC-DC power supply module converts the external direct current into 5V voltage to be output, the 5V voltage is supplied to the power conversion chip, the DVI coding circuit and the VGA driving enhancement circuit, the power conversion chip converts the 5V voltage into 3.3V voltage to be output, and the 3.3V voltage is supplied to the TDMS decoding circuit and the high-speed DAC conversion circuit.
2. The long-range video transmission display device of claim 1, further comprising:
the DVI coding circuit is connected with the output end of the TDMS decoding circuit and is used for coding the TTL signal of the TDMS decoding circuit to generate a standard DVI digital video signal;
and the DVI interface connector is used for outputting the DVI digital video signals of the DVI coding circuit.
3. The long-range video transmission display device of claim 1, further comprising: and the interface protection circuit is connected between the HDMI connector and the TDMS decoding circuit and is used for performing noise interference prevention and electrostatic protection on the HDMI digital video signal.
4. The long-range video transmission display device of claim 1, further comprising: the VGA interface protection circuit is connected between the VGA drive enhancement circuit and the VGA interface connector and is used for performing noise interference prevention and electrostatic protection on VGA analog video signals.
5. The long-range video transmission display device of claim 2, further comprising: DVI interface protection circuit, connect between DVI encoder circuit and DVI interface connector.
6. The long-distance video transmission display apparatus of claim 1, wherein a power protection circuit is connected between the DC power connector and the DC-DC power module for protecting the circuit from reverse impacts.
7. The long-range video transmission display device of claim 1, wherein the VGA drive boost circuit has a maximum bandwidth of 210 MHz.
8. The long-distance video transmission display device of claim 1, wherein the TDMS decoding circuit decodes and converts the HDMI digital video signal into 24-channel parallel TTL signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610602942.6A CN107666579B (en) | 2016-07-27 | 2016-07-27 | Long-distance video transmission display equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610602942.6A CN107666579B (en) | 2016-07-27 | 2016-07-27 | Long-distance video transmission display equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107666579A CN107666579A (en) | 2018-02-06 |
| CN107666579B true CN107666579B (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610602942.6A Active CN107666579B (en) | 2016-07-27 | 2016-07-27 | Long-distance video transmission display equipment |
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|---|---|---|---|---|
| CN101278505A (en) * | 2005-08-30 | 2008-10-01 | 菲尼萨公司 | Optical networks for consumer electronics |
| CN201178465Y (en) * | 2008-02-26 | 2009-01-07 | 晨星半导体股份有限公司 | General fast port switching detection apparatus |
| CN101800038A (en) * | 2009-02-10 | 2010-08-11 | 环旭电子股份有限公司 | Computer display system and method for judging data output sequence of image processing unit |
| CN102256090A (en) * | 2010-05-19 | 2011-11-23 | 索尼公司 | Receiving apparatus and receiving method |
| CN102572213A (en) * | 2010-12-14 | 2012-07-11 | 深圳市英康仕电子有限公司 | Video conversion device |
| CN103546712A (en) * | 2012-07-16 | 2014-01-29 | 欧普提克斯有限公司 | Image system |
| CN203747907U (en) * | 2014-03-20 | 2014-07-30 | 深圳市共联电子有限公司 | VGA signal and HDMI signal mutual conversion signal converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8416248B2 (en) * | 2009-03-26 | 2013-04-09 | Stmicroelectronics Ltd. | Methods and device for display device in-system programming through displayable signals |
-
2016
- 2016-07-27 CN CN201610602942.6A patent/CN107666579B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101278505A (en) * | 2005-08-30 | 2008-10-01 | 菲尼萨公司 | Optical networks for consumer electronics |
| CN201178465Y (en) * | 2008-02-26 | 2009-01-07 | 晨星半导体股份有限公司 | General fast port switching detection apparatus |
| CN101800038A (en) * | 2009-02-10 | 2010-08-11 | 环旭电子股份有限公司 | Computer display system and method for judging data output sequence of image processing unit |
| CN102256090A (en) * | 2010-05-19 | 2011-11-23 | 索尼公司 | Receiving apparatus and receiving method |
| CN102572213A (en) * | 2010-12-14 | 2012-07-11 | 深圳市英康仕电子有限公司 | Video conversion device |
| CN103546712A (en) * | 2012-07-16 | 2014-01-29 | 欧普提克斯有限公司 | Image system |
| CN203747907U (en) * | 2014-03-20 | 2014-07-30 | 深圳市共联电子有限公司 | VGA signal and HDMI signal mutual conversion signal converter |
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| CN107666579A (en) | 2018-02-06 |
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