CN102419700B - Video loop-out device for computers - Google Patents
Video loop-out device for computers Download PDFInfo
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- CN102419700B CN102419700B CN201110295172.2A CN201110295172A CN102419700B CN 102419700 B CN102419700 B CN 102419700B CN 201110295172 A CN201110295172 A CN 201110295172A CN 102419700 B CN102419700 B CN 102419700B
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Abstract
The invention discloses a video loop-out device for computers, which comprises a VGA (video graphics array) video input interface (5), a VGA video conditioning protector (6), a VGA local output interface (11), a VGA remote end loop-out interface (12), a DVI (digital video interface) video input interface (1), a DVI video decoder (2), a DVI video encoder (7), a DVI local output interface (8), an EDID (extended display identification data) feedback appliance (4) and a VGA encoder (3), wherein the output end of the DVI video decoder (2) is respectively connected with the input end of the DVI video encoder (7) and the input end of the VGA encoder (3); and the DVI video input interface (1) receives DVI-format display videos, converts the DVI-format display videos into digital pixel signals, and respectively inputs the digital pixel signals into the DVI video encoder (7) and the VGA encoder (3). By using the device disclosed by the invention, the function of local video output and VGA remote end video loop-out for same display contents can be realized.
Description
Technical field
The present invention relates to a kind of video ring and go out device, particularly a kind of video loop-out device for computers.
Background technology
Video loop-out device for computers receiving computer video card certain form Yi road shows output, except provide a road display to local display as input, also provide VGA signal that an other road has same frame content to the display of far-end as input.All using at present VGA signal branch device to realize computer video ring both at home and abroad goes out; VGA signal branch device comprises: VGA video input interface, VGA video conditioning protector, VGA signal branch unit, the local output interface of VGA, VGA distal loop outgoing interface; wherein VGA video conditioning protector is made up of triode network; VGA signal branch unit is made up of multi-stage operational amplifier, and VGA video conditioning protector is connected with VGA signal branch unit.VGA signal branch device has met the needs that the computer video ring of VGA display format goes out substantially, but along with enriching constantly of computer video display format, the particularly appearance of DVI display format, the application of VGA signal branch device in computer video ring goes out has been subject to great limitation.VGA signal branch device can not receiving computer video card DVI display format output, VGA signal branch device can not only be had the graphoscope of DVI interface that input is provided.
Summary of the invention
The object of the present invention is to provide a kind of video loop-out device for computers, solve display format poor compatibility while using at present VGA splitter to realize video ring to go out function, problem that image resolution ratio is low.
A kind of video loop-out device for computers; comprise: VGA video input interface, VGA video conditioning protector, the local output interface of VGA, VGA distal loop outgoing interface, also comprise: DVI video input interface, DVI Video Decoder, DVI video encoder, the local output interface of DVI, EDID feedback device, VGA scrambler, VGA output gate, VGA Signal Booster.
The output terminal of EDID feedback device is connected with the input end of DVI video input interface, the output terminal of DVI video input interface is connected with the input end of DVI Video Decoder, the output terminal of DVI Video Decoder is connected with the input end of DVI video encoder and the input end of VGA scrambler respectively, the output terminal of DVI video encoder is connected with the input end of the local output interface of DVI, the output terminal of VGA video input interface is connected with the input end of VGA video conditioning protector, the output terminal of the output terminal of VGA scrambler and VGA video conditioning protector is connected with the input end of VGA output gate respectively, the output terminal of VGA output gate is connected with the input end of VGA Signal Booster, the output terminal of VGA Signal Booster is connected with the input end of the local output interface of VGA and VGA distal loop outgoing interface respectively, another output terminal of DVI Video Decoder is connected with the input end of VGA output gate and the input end of the local output interface of VGA respectively.
DVI video input interface receives the display video of DVI form, and DVI Video Decoder converts the display video of DVI form to digital pixel signal, produces the access video format indicator signal of content for " DVI " simultaneously.Digital pixel signal is input to respectively DVI video encoder and VGA scrambler, the digital pixel signal that is input to DVI video encoder is converted to DVI signal again, then through the local output interface of DVI for local DVI display provides video input, the digital pixel signal that is input to VGA scrambler is converted into VGA display video signal and participates in follow-up video gating operation.The DVI output interface of computer display card is before output DVI display video, need the EDID information of reading displayed device, comprise the resolution that display is supported, refresh rate, finally be branched off on two displays and show and input this device Yi road DVI display video, the more local display of EDID feedback device and distal loop go out the resolution that VGA display is supported, the parameter information of refresh rate, choose respectively resolution upper limit minimum value and two refresh rate upper limit minimum value that display is supported that two displays are supported, send to DVI video input interface, DVI video input interface then by EDID information feedback to computer display card, the resolution that makes computer display card output is gone out VGA display by local display and distal loop and supports.
VGA video input interface receives the display video of VGA form; three color channel simulating signals of red, green, blue of the VGA display video that VGA video conditioning protector transmits VGA video input interface are nursed one's health protection, make the electrical specification of color channel simulating signal meet VGA display video standard.Now DVI video input interface does not have video input, and it is the access video format indicator signal of " VGA " that DVI Video Decoder produces content.The VGA display video of VGA video conditioning protector output and the VGA display video of VGA scrambler output are input to two video inputs of VGA output gate, VGA output gate is according to the one group of VGA display video of access video format indicator signal gating transmitting from DVI Video Decoder, in the situation that access video format indicator signal is DVI, the VGA display video transmitting from VGA scrambler is strobed; In the situation that access video format indicator signal is VGA, the VGA transmission of video transmitting from VGA video conditioning protector is strobed.The VGA display video being strobed is transferred to VGA Signal Booster, and VGA Signal Booster has strengthened the driving force of VGA signal, the VGA display video of input is branched off into two groups of identical VGA display videos simultaneously.Wherein one group enters VGA distal loop outgoing interface and exports to distal displayed device, realize the function that this device VGA distal loop goes out, other one group enters the local output interface of VGA, and carry out the control of VGA break-make, according to the break-make of the access video format indicator signal control VGA signal of DVI Video Decoder output, in the situation that access video indicator signal is " DVI ", the VGA display video of the local output interface of VGA turn-offs, now the local output interface of VGA does not have video output, and local display adopts the DVI display video of the local output interface output of DVI; In the situation that access video indicator signal is " VGA ", the VGA display video of the local output interface of VGA is connected, and outputs on local display.
The present invention carries out respectively decoding and coding and conversion process to DVI and two kinds of display video forms of VGA, and carry out video source gating according to the type of access video, the in the situation that of DVI and any one video format input of VGA, the VGA far-end video ring of having realized local video output and identical displaying contents goes out function.
Accompanying drawing explanation
A kind of video loop-out device for computers schematic diagram of Fig. 1.
1.DVI video input interface 2.DVI Video Decoder 3.VGA scrambler 4.EDID feedback device
The local output interface of 5.VGA video input interface 6.VGA video conditioning protector 7.DVI video encoder 8.DVI
The local output interface 12.VGA of 9.VGA output gate 10.VGA Signal Booster 11.VGA distal loop outgoing interface
Embodiment
A kind of video loop-out device for computers; comprise: VGA video input interface 5, VGA video conditioning protector 6, the local output interface 11 of VGA, VGA distal loop outgoing interface 12, also comprise: DVI video input interface 1, DVI Video Decoder 2, DVI video encoder 7, the local output interface 8 of DVI, EDID feedback device 4, VGA scrambler 3, VGA output gate 9, VGA Signal Booster 10.
The output terminal of EDID feedback device 4 is connected with the input end of DVI video input interface 1, the output terminal of DVI video input interface 1 is connected with the input end of DVI Video Decoder 2, the output terminal of DVI Video Decoder 2 is connected with the input end of DVI video encoder 7 and the input end of VGA scrambler 3 respectively, the output terminal of DVI video encoder 7 is connected with the input end of the local output interface 8 of DVI, the output terminal of VGA video input interface 5 is connected with the input end of VGA video conditioning protector 6, the output terminal of the output terminal of VGA scrambler 3 and VGA video conditioning protector 6 is connected with the input end of VGA output gate 9 respectively, the output terminal of VGA output gate 9 is connected with the input end of VGA Signal Booster 10, the output terminal of VGA Signal Booster 10 is connected with the input end of the local output interface 11 of VGA and VGA distal loop outgoing interface 12 respectively, another output terminal of DVI Video Decoder 2 is connected with the input end of VGA output gate 9 and the input end of the local output interface 11 of VGA respectively.
DVI video input interface 1 receives the display video of DVI form, and DVI Video Decoder 2 converts the display video of DVI form to digital pixel signal, produces the access video format indicator signal that content is " DVI " simultaneously.Digital pixel signal is input to respectively DVI video encoder 7 and VGA scrambler 3, the digital pixel signal that is input to DVI video encoder 7 is converted to DVI signal again, then through the local output interface 8 of DVI for local DVI display provides video input, the digital pixel signal that is input to VGA scrambler 3 is converted into VGA display video signal and participates in follow-up video gating operation.The DVI output interface of computer display card is before output DVI display video, need the EDID information of reading displayed device, comprise the resolution that display is supported, refresh rate, finally be branched off on two displays and show and input this device Yi road DVI display video, EDID feedback device 4 more local displays and distal loop go out the resolution that VGA display is supported, the parameter information of refresh rate, choose respectively resolution upper limit minimum value and two refresh rate upper limit minimum value that display is supported that two displays are supported, send to DVI video input interface 1, DVI video input interface 1 then by EDID information feedback to computer display card, the resolution that makes computer display card output is gone out VGA display by local display and distal loop and supports.
VGA video input interface 1 receives the display video of VGA form; three color channel simulating signals of red, green, blue of the VGA display video that VGA video conditioning protector 6 transmits VGA video input interface 1 are nursed one's health protection, make the electrical specification of color channel simulating signal meet VGA display video standard.Now DVI video input interface 1 does not have video input, and DVI Video Decoder 2 produces the access video format indicator signal that content is " VGA ".The VGA display video that the VGA display video that VGA video conditioning protector 6 is exported and VGA scrambler 3 are exported is input to two video inputs of VGA output gate 9, VGA output gate 9 is according to the one group of VGA display video of access video format indicator signal gating transmitting from DVI Video Decoder 2, in the situation that access video format indicator signal is DVI, the VGA display video transmitting from VGA scrambler 3 is strobed; In the situation that access video format indicator signal is VGA, the VGA transmission of video transmitting from VGA video conditioning protector 6 is strobed.The VGA display video being strobed is transferred to VGA Signal Booster 10, and VGA Signal Booster 10 has strengthened the driving force of VGA signal, the VGA display video of input is branched off into two groups of identical VGA display videos simultaneously.Wherein one group enters VGA distal loop outgoing interface 12 and exports to distal displayed device, realize the function that this device VGA distal loop goes out, other one group enters the local output interface 11 of VGA, and carry out the control of VGA break-make, the break-make of the access video format indicator signal control VGA signal of exporting according to DVI Video Decoder 2, in the situation that access video indicator signal is " DVI ", the VGA display video of the local output interface 11 of VGA turn-offs, now the local output interface 11 of VGA does not have video output, the DVI display video that local display adopts the local output interface 8 of DVI to export; In the situation that access video indicator signal is " VGA ", the VGA display video of the local output interface 11 of VGA is connected, and outputs on local display.
Claims (1)
1. a video loop-out device for computers, comprise: VGA video input interface (5), VGA video conditioning protector (6), VGA local output interface (11), VGA distal loop outgoing interface (12), characterized by further comprising: DVI video input interface (1), DVI Video Decoder (2), DVI video encoder (7), DVI local output interface (8), EDID feedback device (4), VGA scrambler (3), VGA output gate (9), VGA Signal Booster (10);
The output terminal of EDID feedback device (4) is connected with the input end of DVI video input interface (1), the output terminal of DVI video input interface (1) is connected with the input end of DVI Video Decoder (2), the output terminal of DVI Video Decoder (2) is connected with the input end of DVI video encoder (7) and the input end of VGA scrambler (3) respectively, the output terminal of DVI video encoder (7) is connected with the input end of the local output interface of DVI (8), the output terminal of VGA video input interface (5) is connected with the input end of VGA video conditioning protector (6), the output terminal of the output terminal of VGA scrambler (3) and VGA video conditioning protector (6) is connected with the input end of VGA output gate (9) respectively, the output terminal of VGA output gate (9) is connected with the input end of VGA Signal Booster (10), the output terminal of VGA Signal Booster (10) is connected with the input end of the local output interface of VGA (11) and VGA distal loop outgoing interface (12) respectively, another output terminal of DVI Video Decoder (2) is connected with the input end of VGA output gate (9) and the input end of the local output interface of VGA (11) respectively,
DVI video input interface (1) receives the display video of DVI form, and DVI Video Decoder (2) converts the display video of DVI form to digital pixel signal, produces the access video format indicator signal of content for " DVI " simultaneously, digital pixel signal is input to respectively DVI video encoder (7) and VGA scrambler (3), the digital pixel signal that is input to DVI video encoder (7) is converted to DVI signal again, then through the local output interface of DVI (8) for local DVI display provides video input, the digital pixel signal that is input to VGA scrambler (3) is converted into VGA display video signal and participates in follow-up video gating operation, the DVI output interface of computer display card is before output DVI display video, need the EDID information of reading displayed device, comprise the resolution that display is supported, refresh rate, finally be branched off on two displays and show and input this device Yi road DVI display video, the more local display of EDID feedback device (4) and distal loop go out the resolution that VGA display is supported, the parameter information of refresh rate, choose respectively resolution upper limit minimum value and two refresh rate upper limit minimum value that display is supported that two displays are supported, send to DVI video input interface (1), DVI video input interface (1) then by EDID information feedback to computer display card, the resolution that makes computer display card output is gone out VGA display by local display and distal loop and supports,
VGA video input interface (1) receives the display video of VGA form, three color channel simulating signals of red, green, blue of the VGA display video that VGA video conditioning protector (6) transmits VGA video input interface (1) are nursed one's health protection, make the electrical specification of color channel simulating signal meet VGA display video standard, now DVI video input interface (1) does not have video input, and it is the access video format indicator signal of " VGA " that DVI Video Decoder (2) produces content, the VGA display video of the VGA display video of VGA video conditioning protector (6) output and VGA scrambler (3) output is input to two video inputs of VGA output gate (9), VGA output gate (9) is according to the one group of VGA display video of access video format indicator signal gating transmitting from DVI Video Decoder (2), in the situation that access video format indicator signal is DVI, the VGA display video transmitting from VGA scrambler (3) is strobed, in the situation that access video format indicator signal is VGA, the VGA transmission of video transmitting from VGA video conditioning protector (6) is strobed, the VGA display video being strobed is transferred to VGA Signal Booster (10), and VGA Signal Booster (10) has strengthened the driving force of VGA signal, the VGA display video of input is branched off into two groups of identical VGA display videos simultaneously, wherein one group enters VGA distal loop outgoing interface (12) and exports to distal displayed device, realize the function that this device VGA distal loop goes out, other one group enters the local output interface of VGA (11), and carry out the control of VGA break-make, according to the break-make of the access video format indicator signal control VGA signal of DVI Video Decoder (2) output, in the situation that access video indicator signal is " DVI ", the VGA display video of the local output interface of VGA (11) turn-offs, now the local output interface of VGA (11) does not have video output, local display adopts the DVI display video of the local output interface of DVI (8) output, in the situation that access video indicator signal is " VGA ", the VGA display video of the local output interface of VGA (11) is connected, and outputs on local display.
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| CN113938621B (en) * | 2021-10-19 | 2024-10-15 | 武汉华之洋科技有限公司 | Video loop-out method for computer screen display |
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| CN101819755A (en) * | 2009-02-27 | 2010-09-01 | 深圳Tcl新技术有限公司 | Monitor joined screen with function of displaying multi-channel video signals and realization method thereof |
| CN201830377U (en) * | 2010-07-22 | 2011-05-11 | 中国船舶重工集团公司第七0九研究所 | Analogue/digital video conversion device for computer |
| CN102123247A (en) * | 2010-12-31 | 2011-07-13 | Tcl新技术（惠州）有限公司 | Loop-connection system for splicing unit and implementation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819755A (en) * | 2009-02-27 | 2010-09-01 | 深圳Tcl新技术有限公司 | Monitor joined screen with function of displaying multi-channel video signals and realization method thereof |
| CN201830377U (en) * | 2010-07-22 | 2011-05-11 | 中国船舶重工集团公司第七0九研究所 | Analogue/digital video conversion device for computer |
| CN102123247A (en) * | 2010-12-31 | 2011-07-13 | Tcl新技术（惠州）有限公司 | Loop-connection system for splicing unit and implementation method thereof |
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