CN219420839U - DVI and VGA video distribution selection system - Google Patents
DVI and VGA video distribution selection system Download PDFInfo
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- CN219420839U CN219420839U CN202223008039.7U CN202223008039U CN219420839U CN 219420839 U CN219420839 U CN 219420839U CN 202223008039 U CN202223008039 U CN 202223008039U CN 219420839 U CN219420839 U CN 219420839U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The utility model discloses a DVI and VGA video distribution selection system, which relates to the technical field of video processing and comprises a DVI processing unit, a VGA processing unit and a VGA two-way switcher; the DVI processing unit is used for processing the input DVI video signals, outputting one same DVI video signal, converting the input DVI video signals into VGA video signals and outputting the VGA video signals to the VGA processing unit and the VGA double-way switcher; the VGA processing unit is used for processing the input VGA video signal and outputting the VGA video signal to the VGA double-way switcher; the VGA double-way switcher is used for switching and outputting the input VGA video signals according to external switching signals. The utility model has the advantages that: the DVI or VGA video signals are unified into VGA signals, so that the DVI or VGA video signal recording device is suitable for recording different interface signals of the DVI and the VGA, can meet the video recording requirements of multiple formats of the DVI and the VGA, and does not need to replace video acquisition equipment.
Description
Technical Field
The utility model relates to the technical field of video processing, in particular to a DVI and VGA video distribution selection system.
Background
With the rapid development of computer technology, computers are becoming more and more widely used. Most computer application scenes need man-machine interaction, and a display is used as output equipment of the man-machine interaction and can provide various video signal interfaces such as DVI (Digital Visual Interface digital video interface), VGA (Video Graphics Array video graphics array) and the like. The DVI or VGA signal output by the computer graphic card is processed by decoding or analog-to-digital conversion, signal parameter adjustment of image brightness, contrast, chromaticity and the like, image scaling, superposition and the like, time sequence generation is carried out, and finally the screen is driven to display video signals output by computers such as graphics, images, tables, characters and the like.
In the practical use process, the computer video signal is required to be recorded and stored, the existing recording means usually uses video acquisition equipment to acquire a second path of video signal separated by a video branching device, the second path of video signal is encoded into a video stream format with a specific compression rate through a hardware encoder, and then the video stream format is stored in a memory, however, the existing video acquisition equipment usually only can support the acquisition of video signals with one format of DVI or VGA, if the recording and the acquisition of DVI or VGA video signals are required to be simultaneously satisfied, a plurality of different video acquisition equipment is required to be arranged, and the practical use process is inconvenient.
Disclosure of Invention
In order to solve the technical problems, the technical scheme provides a DVI and VGA video distribution selection system, which solves the problems that the existing video acquisition equipment can only support the acquisition of video signals in one format of DVI or VGA, and if the recording and the acquisition of the DVI or VGA video signals are required to be simultaneously satisfied, a plurality of different video acquisition equipment are required to be arranged, and the actual use process is inconvenient.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a DVI and VGA video distribution selection system comprises a DVI processing unit, a VGA processing unit and a VGA two-way switcher;
the DVI processing unit is used for processing the input DVI video signals, outputting one same DVI video signal, converting the input DVI video signals into VGA video signals and outputting the VGA video signals to the VGA processing unit and the VGA double-way switcher;
the VGA processing unit is used for processing the input VGA video signal and outputting the VGA video signal to the VGA double-way switcher;
the VGA double-way switcher is used for switching and outputting the input VGA video signals according to external switching signals;
the DVI processing unit comprises a first TVS device, a second TVS device, a DVI equalizer and a DVI video converter, wherein the first TVS device and the second TVS device are electrically connected with a signal input end of the DVI equalizer, and a signal output end of the DVI equalizer is electrically connected with the DVI video converter.
Preferably, the DVI video converter is internally integrated with a DVI signal copying unit, an HDMI/DVI relay unit, an HDMI/DVI receiving unit and a digital-to-analog conversion unit;
the DVI signal copying unit is used for copying the DVI video signals output by the DVI equalizer into the same two paths of DVI signals;
the HDMI/DVI relay unit is used for outputting one path of DVI signal to the external display module;
the HDMI/DVI receiving unit is used for decoding and converting another path of DVI signal into a digital pixel signal;
the digital-to-analog conversion unit is used for converting the digital pixel signals into VGA signals and outputting the VGA signals.
Preferably, the VGA processing unit includes a first three-channel operational amplifier, a second three-channel operational amplifier and a tri-state buffer;
the first three-channel operational amplifier is used for receiving VGA1_ R, VGA1_ G, VGA _B analog signals in VGA video signals output by the DVI processing unit, carrying out 2-multiplication beneficial amplification, and connecting amplified VGA_R1, VGA_G1 and VGA_B1 signals to a first path video signal input port of the VGA two-way switcher;
the second three-channel operational amplifier is used for receiving VGA2_ R, VGA2_ G, VGA _B analog signals in VGA video signals output by the computer graphics card, carrying out 2-multiplication beneficial amplification, and connecting amplified VGA_R2, VGA_G2 and VGA_B2 signals to a second path video signal input port of the VGA two-way switcher;
the tri-state buffer is used for receiving VGA2_HS and VGA2_VS synchronous signals in VGA video signals output by the computer graphics card, shaping and correcting the VGA2_HS and VGA2_VS synchronous signals, and outputting the shaped VGA_H2 and VGA_VS2 synchronous signals to be connected to a second path synchronous signal input port of the VGA two-way switcher.
Preferably, the vga_hs1 and vga_vs1 synchronizing signals in the VGA video signal output by the DVI processing unit are directly connected to the first path synchronizing signal input port of the VGA two-path switcher.
Preferably, the synchronous signal output end of the VGA two-way switcher is electrically connected with the tri-state buffer, and the synchronous signal of the VGA two-way switcher is shaped and corrected by the tri-state buffer and then is input into the lower receiving module.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a DVI and VGA video distribution selection system, which can meet the video recording requirements of DVI and VGA multiple formats in the process of recording computer video signals, when in use, when DVI video signals are input, a DVI processing unit copies the DVI video signals, outputs one path of DVI video signals to an external display module, simultaneously processes and converts the other path of DVI signals into VGA signals to be output, after the DVI video signals are processed by the VGA processing unit, the VGA two-way switcher is input, when the VGA video signals are input, the VGA two-way switcher is directly processed by the VGA processing unit, and then the VGA two-way switcher displays the corresponding VGA signals through an external display module or the VGA video signals to a subordinate receiving module for video acquisition equipment to record and save the computer video signals, unifies the DVI or VGA video signals into the VGA signals, and is suitable for recording the DVI and different interface signals without changing video acquisition equipment.
Drawings
FIG. 1 is a circuit block diagram of the present utility model;
FIG. 2 is a schematic diagram of a DVI equalizer circuit according to the present utility model;
FIG. 3 is a schematic diagram of a DVI video converter circuit in accordance with the present utility model;
fig. 4 is a schematic diagram of a VGA dual-channel switcher circuit in the present utility model.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
1-4, a DVI and VGA video distribution selection system is characterized by comprising a DVI processing unit, a VGA processing unit and a VGA two-way switcher;
the DVI processing unit is used for processing the input DVI video signals, outputting one same DVI video signal, converting the input DVI video signals into VGA video signals and outputting the VGA video signals to the VGA processing unit and the VGA two-way switcher;
the VGA processing unit is used for processing the input VGA video signal and outputting the VGA video signal to the VGA double-way switcher;
the VGA double-way switcher is used for switching and outputting the input VGA video signal according to an external switching signal;
the DVI processing unit comprises a first TVS device, a second TVS device, a DVI equalizer and a DVI video converter, wherein the first TVS device and the second TVS device are electrically connected with the signal input end of the DVI equalizer, and the signal output end of the DVI equalizer is electrically connected with the DVI video converter.
The DVI video signal comprises 4 pairs of differential signals RXI0+/-, RXI1+/-, RXI2+/-, RXC+/-, and a pair of I2C signals DDC_SDA and clock DDC_SCL signals, the DVI video signal is connected with the input of the DVI equalizer, and meanwhile, the differential signals and the I2C signals are respectively connected with the first TVS device and the second TVS device;
referring to fig. 2, the DVI equalizer provides automatic compensation for DVI signal cable transmission, enables cable transmission distances to be extended, and provides a 1-way LOSs of signal (LOS) output for indicating LOSs of clock signals. The output has a disable function, the status chip according to LOS can be placed in an off mode, and for direct communication between chips, the output driver can switch to half the DVI output specification to save power consumption and reduce EMI. To improve signal integrity using a back termination resistor, the output drive current may be increased, a first TVS device connected in series to a differential signal pair with its power terminal connected to +5v, its ground terminal connected to signal ground, a second TVS device connected in parallel to an I2C signal with its power terminal connected to +5v, its ground terminal connected to signal ground
Referring to fig. 3, the ddc_sda signal and the ddc_scl signal of the I2C signal are simultaneously connected to the ddc_rx port of the DVI video converter, the output end of the DVI equalizer 103 is connected to the input end of the DVI video converter 104, and the compensated DVI signal is sent to the DVI video signal converter 104;
the DVI video converter is internally integrated with a DVI signal copying unit, an HDMI/DVI relay unit, an HDMI/DVI receiving unit and a digital-to-analog conversion unit;
the DVI signal copying unit is used for copying the DVI video signals output by the DVI equalizer to form two paths of same DVI signals;
the HDMI/DVI relay unit is used for outputting one path of DVI signal to the external display module;
the HDMI/DVI receiving unit is used for decoding and converting the other DVI signal into a digital pixel signal;
the digital-to-analog conversion unit is used for converting the digital pixel signals into VGA signals and outputting the VGA signals.
The VGA processing unit comprises a first three-channel operational amplifier, a second three-channel operational amplifier and a tri-state buffer;
the first three-channel operational amplifier is used for receiving VGA1_ R, VGA1_ G, VGA _B analog signals in VGA video signals output by the DVI processing unit, carrying out 2-multiplication beneficial amplification, and connecting amplified VGA_R1, VGA_G1 and VGA_B1 signals to a first video signal input port of the VGA two-way switcher;
the second three-channel operational amplifier is used for receiving VGA2_ R, VGA2_ G, VGA _B analog signals in VGA video signals output by the computer graphics card, carrying out 2-multiplication beneficial amplification, and connecting amplified VGA_R2, VGA_G2 and VGA_B2 signals to a second path video signal input port of the VGA two-way switcher;
the tri-state buffer is used for receiving VGA2_HS and VGA2_VS synchronous signals in VGA video signals output by the computer graphics card, shaping and correcting the VGA2_HS and VGA2_VS synchronous signals, and outputting the shaped VGA_H2 and VGA_VS2 synchronous signals to be connected to a second path synchronous signal input port of the VGA two-way switcher.
The VGA_Hs1 and VGA_VS1 synchronizing signals in the VGA video signals output by the DVI processing unit are directly connected to a first path synchronizing signal input port of the VGA double-path switcher.
VGA_R1, VGA_G1, VGA_B1 signals and VGA_Hs1, VGA_VS1 synchronous signals form a first path of VGA signals;
the VGA2_ R, VGA2_ G, VGA2_B signal and the VGA_H2 and VGA_VS2 synchronous signal form a second path of VGA signal;
the VGA double-way switcher switches and outputs VGA signals of corresponding paths to the lower receiving module according to whether DVI video signals or VGA video signals are displayed by the external display module, so that video acquisition equipment can record and store computer video signals;
specifically, when the external display module displays DVI video signals, the VGA two-way switcher outputs first VGA signals;
when the external display module displays VGA video signals, the VGA double-channel switcher outputs second channel VGA signals.
Referring to fig. 4, the synchronization signal output end of the VGA two-way switch is electrically connected with the tri-state buffer, and the red Rout, green Gout and blue Bout signals outputted by the VGA two-way switch 204 are connected to the lower receiving module, the line synchronization signal HSO and the field synchronization signal VSO outputted by the VGA two-way switch are connected to the tri-state buffer, the line synchronization signal and the field synchronization signal are shaped and corrected again, and the shaped line synchronization signal HSout and the shaped field synchronization signal VSout are connected to the lower receiving module and the red Rout, green Gout and blue Bout signals are combined into a complete VGA signal.
The working process of the utility model is as follows: collecting input DVI and VGA signals;
the DVI processing unit is used for copying the DVI video signals, outputting one path of DVI video signals to the external display module, processing the other path of DVI signals, converting the other path of DVI signals into VGA signals, outputting the VGA signals, and inputting the VGA signals to the VGA two-way switcher after the DVI signals are processed by the VGA processing unit;
after the VGA video signal is directly processed by the VGA processing unit, the VGA video signal is input into the VGA double-way switcher;
and then the VGA double-way switcher switches whether the DVI video signal or the VGA video signal is displayed by the external display module to output the corresponding VGA signal to the lower receiving module.
In summary, the utility model has the advantages that: the DVI or VGA video signals are unified into VGA signals, so that the DVI or VGA video signal recording device is suitable for recording different interface signals of the DVI and the VGA, can meet the video recording requirements of multiple formats of the DVI and the VGA, and does not need to replace video acquisition equipment.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The DVI and VGA video distribution selection system is characterized by comprising a DVI processing unit, a VGA processing unit and a VGA double-way switcher;
the DVI processing unit is used for processing the input DVI video signals, outputting one same DVI video signal, converting the input DVI video signals into VGA video signals and outputting the VGA video signals to the VGA processing unit and the VGA double-way switcher;
the VGA processing unit is used for processing the input VGA video signal and outputting the VGA video signal to the VGA double-way switcher;
the VGA double-way switcher is used for switching and outputting the input VGA video signals according to external switching signals;
the DVI processing unit comprises a first TVS device, a second TVS device, a DVI equalizer and a DVI video converter, wherein the first TVS device and the second TVS device are electrically connected with a signal input end of the DVI equalizer, and a signal output end of the DVI equalizer is electrically connected with the DVI video converter.
2. The DVI and VGA video distribution selection system according to claim 1, wherein the DVI video converter is internally integrated with a DVI signal copying unit, an HDMI/DVI relay unit, an HDMI/DVI receiving unit, and a digital-to-analog conversion unit;
the DVI signal copying unit is used for copying the DVI video signals output by the DVI equalizer into the same two paths of DVI signals;
the HDMI/DVI relay unit is used for outputting one path of DVI signal to the external display module;
the HDMI/DVI receiving unit is used for decoding and converting another path of DVI signal into a digital pixel signal;
the digital-to-analog conversion unit is used for converting the digital pixel signals into VGA signals and outputting the VGA signals.
3. A DVI and VGA video distribution selection system according to claim 2, wherein the VGA processing unit includes a first three-channel op-amp, a second three-channel op-amp and a tri-state buffer;
the first three-channel operational amplifier is used for receiving VGA1_ R, VGA1_ G, VGA _B analog signals in VGA video signals output by the DVI processing unit, carrying out 2-multiplication beneficial amplification, and connecting amplified VGA_R1, VGA_G1 and VGA_B1 signals to a first path video signal input port of the VGA two-way switcher;
the second three-channel operational amplifier is used for receiving VGA2_ R, VGA2_ G, VGA _B analog signals in VGA video signals output by the computer graphics card, carrying out 2-multiplication beneficial amplification, and connecting amplified VGA_R2, VGA_G2 and VGA_B2 signals to a second path video signal input port of the VGA two-way switcher;
the tri-state buffer is used for receiving VGA2_HS and VGA2_VS synchronous signals in VGA video signals output by the computer graphics card, shaping and correcting the VGA2_HS and VGA2_VS synchronous signals, and outputting the shaped VGA_H2 and VGA_VS2 synchronous signals to be connected to a second path synchronous signal input port of the VGA two-way switcher.
4. A DVI and VGA video distribution selection system according to claim 3, wherein the vga_hs1 and vga_vs1 synchronizing signals in the VGA video signal outputted from the DVI processing unit are directly connected to the first path synchronizing signal input port of the VGA two-way switch.
5. The DVI and VGA video distribution selection system of claim 4, wherein the synchronizing signal output of the VGA two-way switch is electrically connected to the tri-state buffer, and the synchronizing signal of the VGA two-way switch is shaped and corrected by the tri-state buffer and then input to the lower receiving module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223008039.7U CN219420839U (en) | 2022-11-11 | 2022-11-11 | DVI and VGA video distribution selection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223008039.7U CN219420839U (en) | 2022-11-11 | 2022-11-11 | DVI and VGA video distribution selection system |
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| CN219420839U true CN219420839U (en) | 2023-07-25 |
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| CN202223008039.7U Active CN219420839U (en) | 2022-11-11 | 2022-11-11 | DVI and VGA video distribution selection system |
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