CN202475660U - Video signal transmitting and selecting device - Google Patents
Video signal transmitting and selecting device Download PDFInfo
- Publication number
- CN202475660U CN202475660U CN201120573503XU CN201120573503U CN202475660U CN 202475660 U CN202475660 U CN 202475660U CN 201120573503X U CN201120573503X U CN 201120573503XU CN 201120573503 U CN201120573503 U CN 201120573503U CN 202475660 U CN202475660 U CN 202475660U
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- China
- Prior art keywords
- optic module
- optical fiber
- cross point
- video signal
- signal
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Abstract
The utility model discloses a video signal transmitting and selecting device which includes at least one first optical fiber module, a cross point switch circuit, and at least one second optical fiber module. The first optical fiber module is used for receiving and converting a video signal transmitted in an optical fiber channel. The cross point switch circuit is coupled with the first optical fiber module and the second optical fiber module, and is used for gating a signal converted by the first optical fiber module, and then transmits a gate signal to the second optical fiber module. The second optical fiber module is used for converting a signal output by the cross point switch circuit, and then transmits a converted signal via an optical fiber channel. Because the optical fiber transmission has the no attenuation characteristic, the video signal transmitting and selecting device uses the optical fiber channel to transmit the video signal. At the same time, the gating of signals in multiple paths by the cross point switch circuit is equivalent to the optical signal switching by the electrical signal switching, so the selection of the video signal and the long distance transmission are realized.
Description
Technical field
The utility model relates to video transmission Display Technique field, relates in particular to the device of a kind of video signal transmission and selection.
Background technology
Along with the development of information technology, the particularly swift and violent increase of HD video transmission demand.With the video monitoring is example, normally adopts video camera to take, and then the video signal transmission of taking is arrived monitor terminal, the corresponding monitor of one tunnel vision signal.If want the content that a video camera is taken is sent to many monitor terminals; Or the content that multiple cameras is taken sends to less monitor terminal (number of video camera is more than the number of monitor terminal); Current way is to select the mode of video distributor and/or video matrix; It is unaffected that video distributor can make vision signal give a plurality of output equipment short distances simultaneously; Thereby guarantee to a certain extent video transmission synchronously, but do not have substantial effect for the branch of long transmission apart from coaxial cable, still have bigger problem of signal attenuation.(m＞n) can only be unaffected in short distance, but do not have actual property effect for the transmission of long distance and though the method that video matrix can switch through array outputs to n road monitor terminal arbitrarily with m road vision signal.No matter adopt video distributor or video matrix, it costs an arm and a leg, and can not grow the transmission of distance, and wayward.Therefore, need a kind of vision signal of can carrying out to select, and can grow Distance Transmission and do not have the device of signal attenuation.
The utility model content
The utility model provides the device of a kind of video signal transmission and selection.
According to the utility model embodiment, the device of a kind of video signal transmission and selection is provided, comprising: at least one first optic module, cross point switches circuit, at least one second optic module; Said first optic module is used to receive and change the vision signal from the optical-fibre channel transmission; Said cross point switches circuit couples with said first optic module, said second optic module respectively, is used for the signal after said first optic module conversion is carried out gating, and the signal behind the gating is outputed to said second optic module; Said second optic module be used to change the signal of said cross point switches circuit output and will change after signal send through optical-fibre channel.
Said device also comprises address decoding circuitry, is used to control the gating of said cross point switches circuit.Said address decoding circuitry can be through microprocessor or FPGA or CPLD realization.
Said device also comprises: at least one first interface and at least one second interface, said first optic module through said first interface connect said cross point switches circuit, said second optic module is connected with said cross point switches circuit through said second interface.Said first interface and said second interface are the differential signal interface.
First optic module comprises optical transceiver or fiber optical transceiver, and second optic module comprises optical transceiver or fiber optical transceiver.
The beneficial effect of the utility model is: utilize the zero-decrement characteristics of Optical Fiber Transmission; Through the optical-fibre channel transmission video signal; Simultaneously, adopt the cross point switches circuit to realize the gating of multiple signals, be equivalent to utilize the switching of the signal of telecommunication to realize the switching of light signal; Thereby realize both can growing Distance Transmission again to the selection of vision signal.
Description of drawings
Fig. 1 is the structural representation of device of video signal transmission and the selection of a kind of embodiment.
Embodiment
Combine accompanying drawing that the utility model is done further explain through embodiment below.
As shown in Figure 1, the device embodiment of video signal transmission and selection comprises: at least one first optic module 10 (i.e. first optic module 1, the first optic module 2......, the first optic module m), cross point switches circuit 30, at least one second optic module 50 (i.e. second optic module 1, the second optic module 2......, the second optic module n).First optic module 10 is used to receive and change the vision signal from optical-fibre channel 80 transmission; Cross point switches circuit 30 couples with first optic module 10 and second optic module 50 respectively, is used for the signal after 10 conversions of first optic module is carried out gating, and the signal behind the gating is outputed to second optic module 50; Second optic module 50 be used to change the signal of cross point switches circuit 30 outputs and will change after signal through optical-fibre channel 80 ' send.First optic module comprises optical transceiver or fiber optical transceiver, and second optic module comprises optical transceiver or fiber optical transceiver.
In the present embodiment, cross point switches circuit 30 adopts differential signal as input/output interface, and as shown in Figure 1, input interface is at least one first interface 20, and output interface is at least one second interface 40; One first corresponding one first interface of optic module, one first optic module connects the cross point switches circuit through its first corresponding interface, and one second optic module connects the cross point switches circuit through its second corresponding interface.The realization of cross point switches circuit can adopt crosspoint circuit commonly used to realize.
In the present embodiment; Adopt the gating that is input to output of address decoding circuitry 70 control cross point switches circuit 30; Address decoding circuitry can be passed through microprocessor or FPGA (Field Programmable Gateway Array; Field programmable gate array) or CPLD (Complex Programmable Logic Device, CPLD) realize.
Adopt the video signal transmission of present embodiment and the device of selection; Wherein the cross point switches circuit adopts differential signal as input/output interface; Be input to the gating of output by address decoding control; Adopt optic module to be connected, make the switching of whole device realization fiber-optic signal with differential signal interface on the cross point switches circuit.For example; In video monitoring; The vision signal that video camera is taken is carried out the photosignal conversion through the optical-fibre channel transmission via first optic module, and the signal of telecommunication after the conversion is exported by cross point switches circuit gating; The signal of telecommunication of output carries out opto-electronic conversion through second optic module, and the light signal after the conversion is again through the optical-fibre channel transmission; Thereby, realized both can growing Distance Transmission again and not worry signal attenuation to the selection of vision signal.
Above content is the further explain that combines concrete execution mode that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection range of the utility model.
Claims (6)
1. the device of video signal transmission and selection is characterized in that, comprising: at least one first optic module, cross point switches circuit, at least one second optic module; Said first optic module is used to receive and change the vision signal from the optical-fibre channel transmission; Said cross point switches circuit couples with said first optic module, said second optic module respectively, is used for the signal after said first optic module conversion is carried out gating, and the signal behind the gating is outputed to said second optic module; Said second optic module be used to change the signal of said cross point switches circuit output and will change after signal send through optical-fibre channel.
2. the device of video signal transmission as claimed in claim 1 and selection is characterized in that, also comprises address decoding circuitry, is used to control the gating of said cross point switches circuit.
3. the device of video signal transmission as claimed in claim 2 and selection is characterized in that, said address decoding circuitry is through microprocessor or FPGA or CPLD realization.
4. the device of video signal transmission as claimed in claim 3 and selection; It is characterized in that; Also comprise: at least one first interface and at least one second interface, said first optic module through said first interface connect said cross point switches circuit, said second optic module is connected with said cross point switches circuit through said second interface.
5. the device of video signal transmission as claimed in claim 4 and selection is characterized in that, said first interface and said second interface are the differential signal interface.
6. like the device of each described video signal transmission of claim 1-5 and selection, it is characterized in that first optic module comprises optical transceiver or fiber optical transceiver, second optic module comprises optical transceiver or fiber optical transceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120573503XU CN202475660U (en) | 2011-12-31 | 2011-12-31 | Video signal transmitting and selecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120573503XU CN202475660U (en) | 2011-12-31 | 2011-12-31 | Video signal transmitting and selecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202475660U true CN202475660U (en) | 2012-10-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120573503XU Expired - Fee Related CN202475660U (en) | 2011-12-31 | 2011-12-31 | Video signal transmitting and selecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202475660U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104902194A (en) * | 2015-06-03 | 2015-09-09 | 深圳市创凯电子有限公司 | Video/audio signal channel switching device |
| CN110149149A (en) * | 2019-05-14 | 2019-08-20 | 北京小鸟科技股份有限公司 | Communication module and KVM switching equipment, system for KVM switching equipment |
| CN110149149B (en) * | 2019-05-14 | 2024-04-30 | 北京小鸟科技股份有限公司 | Communication module for KVM switch device, KVM switch device and system |
-
2011
- 2011-12-31 CN CN201120573503XU patent/CN202475660U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104902194A (en) * | 2015-06-03 | 2015-09-09 | 深圳市创凯电子有限公司 | Video/audio signal channel switching device |
| CN110149149A (en) * | 2019-05-14 | 2019-08-20 | 北京小鸟科技股份有限公司 | Communication module and KVM switching equipment, system for KVM switching equipment |
| CN110149149B (en) * | 2019-05-14 | 2024-04-30 | 北京小鸟科技股份有限公司 | Communication module for KVM switch device, KVM switch device and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20121231 |