CN103186248A - Remote management system and remote management method thereof - Google Patents
Remote management system and remote management method thereof Download PDFInfo
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- CN103186248A CN103186248A CN2012105549317A CN201210554931A CN103186248A CN 103186248 A CN103186248 A CN 103186248A CN 2012105549317 A CN2012105549317 A CN 2012105549317A CN 201210554931 A CN201210554931 A CN 201210554931A CN 103186248 A CN103186248 A CN 103186248A
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Abstract
A remote management system and a remote management method thereof, the remote system comprises a computer end module and a remote management device, wherein the computer end module receives an image signal, a horizontal synchronization signal and a vertical synchronization signal from a computer. The computer end module modulates the vertical synchronous signal into a first pulse wave signal and a second pulse wave signal and outputs a first differential signal according to one component of the image signal, the first pulse wave signal and the second pulse wave signal. The remote management device restores the first differential signal into the vertical synchronization signal and the component of the image signal after receiving the first differential signal.
Description
Technical field
The present invention is about a kind of long-distance management system and method for remote management; Particularly a kind of have long-distance management system and a method for remote management of simplifying signal handler and lower cost.
Background technology
Multi-computer switch (Keyboard-Video-Mouse Switch; KVM Switch) make distance supervisor single group of keyboard, screen and mouse (generally being collectively referred to as console or control device) to manage and to control multiple computers.Computer stretcher (Keyboard-Video-Mouse Extender; KVM Extender) or image stretcher (Video Extender) can significantly extend distance between a console and the single computer.Multi-computer switch or computer stretcher can be collectively referred to as KVM.
United States Patent (USP) the 5th, 721, disclose a kind of multi-computer switch of matrix form No. 842, the function that it has integrated above-mentioned multi-computer switch and computer stretcher makes the distance supervisor of many control devices to select being positioned at 32 long-range computers by this multi-computer switch and controls.As United States Patent (USP) the 5th, 721,84 instructionss are shown in Figure 1, and this matrix is by centered by a multi-computer switch (element of figure number 60), add a plurality of computer end modules (Computer Interface Module) and many CAT-5 cables (element 72 or 74) in addition and constitute.This computer end module refers to the element of figure number 76, and the CAT-5 cable is the employed transmission line of general Ethernet (Ethernet), and it is right that its inside comprises four twisted pair wires.
Shown in its Figure 10 A to 10B, United States Patent (USP) the 5th, 721 also discloses the device and method that a kind of correction of image signal that makes computer output can transfer to long-range console (Console) for No. 842.In order to extend the distance that correction of image signal can transmit, the image distortion (the distortion reason mainly comprises noise and decay) that minimizing causes because of long Distance Transmission, all have a computer end module between every computer and the multi-computer switch, with this computer end module the correction of image signal (mainly comprising single-ended RGB composition and vertical/horizontal synchronizing signal) of computer output is done one and handle.Its pack processing is contained in the transmission end RGB composition is converted to differential wave (Differential) by single-ended (Single-ended) signal, to offset the noise of being introduced because of long Distance Transmission at receiving end.
In addition, because the entity transmission line that the quantity of the correction of image signal of computer output can provide greater than the CAT-5 cable (four twisted pair wires to), this computer end module can load vertical synchronizing signal and horizontal-drive signal respectively (coding) on wherein two compositions of RGB composition, so could be with RGB composition and vertical/horizontal synchronizing signal in differential mode at right wherein three twisted pair wires of four twisted pair wires of CAT-5 cable to transmitting.For example its horizontal-drive signal loads in the middle of the G composition; Its vertical synchronizing signal loads in the middle of the B composition.
In addition, in the transmission end of image (KVM is near this end of computer) here, owing to have multiple different pattern (being illustrated in down) according to VESA (Video Electronics Standards Association) the defined synchronizing signal of standard, usually the polarity of multiple synchronizing signal can be done a conversion in advance at KVM near this end of computer, for example horizontal/vertical synchronization signals all is converted to positive polarity, to simplify the internal circuit of above-mentioned computer end module or stretcher.Thus, for the receiving end (KVM is near this end of screen) that makes image can correctly come out the vertical/horizontal synchronizing signal reduction (decoding) that loads in the RGB composition, a mode signal (Mode Signal) also must be transmitted in addition in the transmission end, and this mode signal loads in the middle of the R composition.
So-called " synchronizing signal has multiple different pattern " can refer to that for instance vertical synchronizing signal is different with the polarity of horizontal-drive signal.Or, certain first pattern synchronizing signal in, its vertical/horizontal synchronizing signal is positive polarity, and in the synchronizing signal of certain second pattern, its vertical synchronizing signal is positive polarity, its horizontal-drive signal but is negative polarity.In other words, at United States Patent (USP) the 5th, 721, under No. 842 disclosed frameworks, if the receiving end that this mode signal is given image is not transmitted in the transmission end of image, the receiving end of image can't correctly come out the vertical/horizontal synchronizing signal reduction (decoding) that loads in the RGB composition, and thus, screen can't obtain correctly the synchronizing signal of (identical with computer output).Shown in its Figure 10 A to 10B, make the receiving end of image, also be provided with corresponding reduction (decoding) circuit, wherein an input signal of element 314 is the coherent signal of the mode signal that transmits of transmission end.In addition, because this mode signal is basis for estimation with amplitude (Amplitude), so the amplitude of this mode signal may cause decay because of the transmission of long distance at receiving end, and then cause the mistake of receiving end on the polarity of judging synchronizing signal.
Summary of the invention
The object of the present invention is to provide a kind of long-distance management system and method for remote management thereof, so that program and the hardware structure of the transmission of the signal of video signal that is different from conventional art and synchronizing signal to be provided.
Long-distance management system of the present invention comprises computer end module and long-distance management device.The computer end module connects the output port of a controlled computer, to receive and to handle signal of video signal, horizontal-drive signal and the vertical synchronizing signal that computer is exported.
The computer end module further comprises synchronizing signal pre-process circuit, the first differential driving circuit, the second differential driving circuit and the 3rd differential driving circuit.The synchronizing signal pre-process circuit is modulated to first pulse wave and second pulse wave signal with vertical synchronizing signal, and wherein first pulse wave and the distance of second pulse wave signal on time shaft are corresponding to the time shaft width of vertical synchronizing signal.In addition, the first input end of the first differential driving circuit receives first composition of signal of video signal, second input end then is that the motor synchronizing signal pre-processing circuit receives first pulse wave and second pulse wave signal, and first pulse wave and second pulse wave signal loaded in first composition of signal of video signal, to export first differential wave.
On the other hand, the first input end of the second differential driving circuit and second input end receive second composition and the horizontal-drive signal of signal of video signal respectively, and export second differential wave behind second composition that horizontal-drive signal is loaded on signal of video signal.
In addition, the first input end of the 3rd differential driving circuit and second input end receive the three one-tenth sub-signals of signal of video signal, first test signal of colour cast (Skew) that detects signal of video signal RGB and second test signal of decay respectively, and behind the 3rd composition that test signal is loaded on signal of video signal output the 3rd differential wave.
Long-distance management device comprises the first differential receiving circuit, the second differential receiving circuit, the 3rd differential receiving circuit and goes back primary circuit, corresponds respectively to the first differential driving circuit, the second differential driving circuit and the 3rd differential driving circuit of computer end module.The first differential receiving circuit receives first differential wave that the first differential driving circuit is exported, and goes back primary circuit and it is reduced to vertical synchronizing signal that controlled computer exports and first composition of signal of video signal.On the other hand, the second differential receiving circuit is accepted second differential wave that the second differential driving circuit is exported, and goes back primary circuit and it is reduced to horizontal-drive signal that controlled computer exports and second composition of signal of video signal.In addition, the 3rd differential receiving circuit is accepted the 3rd differential wave that the 3rd differential driving circuit is exported, and goes back primary circuit and with the 3rd composition and the test signal of its reduction controlled computer institute output image signal.
In preferred embodiment, when vertical synchronizing signal has positive polarity, rising edge and the falling edge of first pulse wave and the preferable corresponding vertical synchronizing signal of second pulse wave signal.Or when vertical synchronizing signal had negative polarity, first pulse wave and second pulse wave signal then were falling edge and the rising edges corresponding to vertical synchronizing signal.In addition, the pulse bandwidth that comprises of first pulse wave or second pulse wave signal can be in order to represent vertical synchronizing signal or vertical synchronizing signal one polarity wherein.For example, the pulse bandwidth of first pulse wave and second pulse wave signal can be respectively applied to represent the polarity of horizontal-drive signal or vertical synchronizing signal, and anti-is as the same.
Description of drawings
Figure 1 shows that the synoptic diagram of traditional multi-computer switch;
Fig. 2 A, 2B and 2C are depicted as the synoptic diagram of long-distance management system of the present invention;
Fig. 3 A, 3B, 3C, 4A, 4B, 4C and 4D are depicted as internal circuit or the functional block diagram of computer end module; And
Fig. 5 A to 5D is depicted as the synoptic diagram of first pulse wave and second pulse wave signal.
[main element symbol description]
50 long-distance management systems
100A, the 100B control device
110 first computers (middle control computer)
200 second computers (controlled computer)
500 long-distance management devices
510 first ends
515 network interface controllers
520 second ends
530 computer end modules
531 USB connector
532 VGA connectors
533 RJ-45 interfaces
534 cresset displays
Control module in 535
550 switch the mould resistance
555 differential receiver modules
556 first differential receiving circuits
557 second differential receiving circuits
558 the 3rd differential receiving circuits
560 image processing modules
570 storeies
580 central processing units
600 differential driver modules
601 first differential driving circuits
602 second differential driving circuits
603 the 3rd differential driving circuits
604A, 604C, 604E first input end
605B, 605D, 605F second input end
610 synchronizing signal pre-process circuits
615 synchronizing signal modulation circuits
620 synchronizing signal simplification circuit
630 RS-485 transceivers
640 first multiplexers
650 second multiplexers
660 master controllers
670 storeies
680 signal generation devices
700 USB device control module
800 networks
900 go back primary circuit
905 demodulator circuits
910 first polarity adjustment circuits
920 second polarity adjustment circuits
930 decoding circuits
The H horizontal-drive signal
The vertical synchronizing signal of V_in_P positive polarity
V
1First pulse wave signal
V
2Second pulse wave signal
R signal of video signal (first composition)
G signal of video signal (second composition)
B signal of video signal (the 3rd composition)
D
1First differential wave
D
2Second differential wave
D
3The 3rd differential wave
T1 first test signal
T2 second test signal
W
1First pulse bandwidth
W
2Second pulse bandwidth
Ctrl_1 first control signal
Ctrl_2 second control signal
EDID, EDID# 1, EDID# 2 extending display identification code
KB Keyboard Control signal
MS mouse control signal
The HS housing
The CA cable
C5 CAT-5 cable
Embodiment
See also Fig. 2 A, long-distance management system 50 of the present invention can be coupled to control device 100A, the 100B of user end one or many second computers 200 (controlled computer), make the user of this control device 100A, 100B can single group keyboard/mouse and screen manage and control one or many controlled computers 200.Long-distance management system 50 of the present invention more makes one first computer 110 (middle control computer) be coupled to one or many second computers 200 (controlled computer) via network 800, make first computer 110 the user can by long-range to one or many second computers 200 manage and control.Wherein the number of this control device 100A, 100B or middle control computer 110 is not limited to one.Long-distance management system 50 of the present invention comprises a long-distance management device 500, one or more computer end module 530, control module 535 in one or more at least.Wherein, long-distance management device 500 more comprises one first end 510 and one second end 520.Computer end module 530 is in order to extend the distance between second computer 200 and the long-distance management device 500; In control module 535 in order to extending the distance between control device 100B and the long-distance management device 500, after all will being specified in.
See also Fig. 2 B, in long-distance management system 50 of the present invention, in order to extend the distance between long-distance management device 500 and this one or many second computers 200, alternative comprises a computer end module (Computer Interface Module; CIM) 530.This computer end module 530 has a housing HS and several are by the outward extending cable CA of housing, have a plurality of connectors at cable CA away from the end of housing HS, for example a USB connector 531 and a VGA connector 532 are in order to electrically connect a certain second computer 200 of Fig. 2 A.For extended distance, this computer end module 530 can be handled signal of video signal RGB, a horizontal-drive signal H, a vertical synchronizing signal V or some test signals of 200 outputs of second computer.For example this computer end module 530 can be converted to differential wave by single-ended signal with signal of video signal RGB, and horizontal/vertical synchronization signals H/V is loaded in this differential wave.Having in the art and know that usually the knowledgeable can be cognitive, is second computer 200 that has distinct interface in order to connect, and this USB connector 531 can be replaced by one or more PS/2 or other connectors; VGA connector 532 can be replaced by DVI connector or HDMI connector.
In addition, the housing HS of this computer end module 530 more is provided with a RJ-45 interface 533 and several cresset displays (Power/On line) 534, wherein RJ-45 interface 533 is in order to connect a CAT-5 (Category5) cable C5 or other similar cables, for example CAT-5e or CAT-6.The computer end module is coupled to one first end 510 of long-distance management device 500 through CAT-5 cable C5 thus.This CAT-5 cable C5 has four twisted pair wires to (Twisted Wire Pair), and wherein three pairs are used for transmitting the signal relevant with image, for example signal of video signal composition RGB, horizontal/vertical synchronization signals H/V and/or one or more test signal.The 4th remaining twisted pair wire is to being used for transmitting image signal in addition, for example data of the control signal KB/MS of keyboard/mouse or virtual media (Virtual Media).In addition, cresset display 534 is in order to show the state of this computer end module.
Then see also Fig. 2 C, long-distance management device 500 of the present invention more comprises network interface controller 515, handover module 550, differential receiver module 555, image processing module 560, storer 570, central processing unit 580, RS-485 transceiver 630, USB device control module 700 and goes back primary circuit 900.Wherein, first end 510 of long-distance management device 500 can be via network-coupled to this first computer 110, and this second end 520 be coupled to this one or many second computers 200.KM0432, KM0832, KM0932, KN4140 or KN2132 that the hardware structure of this long-distance management device 500 can Hongzheng Automation Science-Technology Co., Ltd be made are representative.Wherein, when long-distance management device 500 adopts the hardware structure of KN4140 or KN2132, has a network interface controller 515, make the computer 110 of winning to couple this long-distance management device 500 earlier via network 800, and then be coupled to one or many second computers 200 via this long-distance management device 500, between long-distance management device 500 and second computer 200, may have a computer end module 530.When long-distance management device 500 adopts the hardware structure of KM0432, KM0832 or KM0932, this control device 100A is connected directly to long-distance management device 500, and control device 100B then is coupled to long-distance management device 500 to extend distance each other via control module 535 in.That is this long-distance management device 500 can be coupled to one or many second computers 200 via network 800 with first computer 110, or control device 100A, 100B is coupled (not via network) to one or many second computers 200.
See also Fig. 3 A, except USB connector 531 and VGA connector 532, the inside of aforementioned computer end module 530 further comprises differential driver module 600, synchronizing signal pre-process circuit 610, RS-485 transceiver 630, first multiplexer 640, second multiplexer 650, master controller 660, storer 670 and signal generation device 680.The storer 670 of present embodiment can be an electronics erasable read-only memory (EEPROM), in order to store another group extending display identification code EDID#2 that one group of default extending display identification code (Extended Display Identification Data/EDID) EDID#1 or the screen of control device 100A or 100B provide.And the extending display identification code EDID#2 that extending display identification code EDID#1 that this is default or screen provide offers second computer 200 again.First multiplexer 640 is corresponding to aforesaid differential driver module 600, and it is making one or more test signal T1/T2 can load in suitable time point on the image composition RGB under control of master controller 660.Second multiplexer 650 makes second computer 200 can obtain extending display identification code EDID (the real EDID#2 that default EDID#1 or screen provide) under the control of master controller 660 corresponding to storer 670.USB device control module 700 (can be integrated among the master controller 660) is in order to produce keyboard/mouse and/or the USB mass storage (Mass Storage Device) of simulation to second computer 200.After will being specified in as for the function of synchronizing signal pre-process circuit 610, and collocation Fig. 3 B describes.
Still see also Fig. 3 A, in this long-distance management system 50, second computer 200 is the source of signal of video signal RGB, so computer end module 530 is as the transmission end of a signal of video signal RGB.The RGB composition of the signal of video signal that the one differential driver module (Differential Driver) 600 of this computer end module 530 can be exported this second computer 200 is converted to several differential waves D
1, D
2, D
3After export this long-distance management device 500 to, to increase the distance (for example can reach 1000 feet) that this signal of video signal RGB can transmit.At these differential waves D
1, D
2, D
3Among also may be mingled with other signals, for example horizontal/vertical synchronization signals H/V or some are in order to the first test signal T1 of the colour cast (skew) that detects signal of video signal RGB and the second test signal T2 of decay.In a preferred embodiment, this differential driver module 600 can be the EL5378 that AD8146, AD8147 that Analog Devices company provides or AD8148 or Intersil company provide.
In addition, among this computer end module 530, also optionally be provided with a FPGA, oscillator or other any appropriate signals generation devices 680, in order to produce the aforesaid first test signal T1 and the second test signal T2.In this computer end module 530, also be provided with first multiplexer 640, be mixed in this differential wave D in order to control this first test signal T1 and horizontal/vertical synchronization signals H/V
1/ D
2/ D
3In time point (timing).Via suitable time point control, the above-mentioned first test signal T1 can not influence the normal demonstration of screen at receiving end.That is, when long-distance management system 50 at receiving end according to the first test signal T1 when carrying out image compensation, the user of control device 100A or 100B still can normally see the desktop images of second computer, 200 outputs.The first test signal T1 and the second test signal T2 may have different frequencies.For example, the first test signal T1 one has the square wave of 2 MHz frequencies; The second test signal T2 one has the square wave of 8 MHz frequencies.In the transmission end, the first test signal T1 can be via three twisted pair wires of aforementioned CAT-5 cable to being sent to receiving end, and the second test signal T2 only can be via a certain twisted pair wire to being sent to receiving end.At differential wave D
1/ D
2/ D
3In the middle of, the polarity T1 of first test signal may be identical with the polarity of RGB composition; The polarity of vertical synchronizing signal, horizontal-drive signal and the second test signal T2 may be opposite with the polarity of RGB composition.
See also Fig. 3 B, Fig. 3 B is primarily aimed at the synchronizing signal pre-process circuit 610 of Fig. 3 A and does further explanation.Synchronizing signal pre-process circuit 610 further comprises synchronizing signal modulation circuit 615 and synchronizing signal simplification circuit 620.From the vertical synchronizing signal V of second computer 200 before inputing to differential driver module 600 via VGA connector 532, can be earlier through the processing of synchronizing signal pre-process circuit 610.In more detail, synchronizing signal pre-process circuit 610 can be interrogated V with vertical synchronization with its synchronizing signal modulation circuit 615 and be modulated to one first pulse wave V after being received vertical synchronizing signal V
1And one second pulse wave signal V
2In a preferred embodiment, this synchronizing signal modulation circuit 615 is a JK flip-flop (JK Flip-Flop).For example, when the vertical synchronizing signal V that inputs to synchronizing signal pre-process circuit 610 had positive polarity, its rising edge can trigger this JK flip-flop and produce the first pulse wave V
1Its falling edge can trigger this JK flip-flop and produce the second pulse wave signal V
2Or when this vertical synchronizing signal V had negative polarity, its falling edge can trigger this JK flip-flop and produce the first pulse wave V
1Its rising edge can trigger this JK flip-flop and produce the second pulse wave signal V
2This first pulse wave V wherein
1And this second pulse wave signal V
2Between distance on time shaft corresponding to the pulse bandwidth of this vertical synchronizing signal V.
Please consult Fig. 3 A and 3B simultaneously, it should be noted that, because the horizontal/vertical synchronization signals H/V of second computer, 200 outputs may have the different pattern of kind surplus in the of ten, therefore the synchronizing signal pre-process circuit 610 of computer end module 530 may have a synchronous signal simplification circuit 620, before carrying out the modulation of vertical synchronizing signal V and to input to differential driver module 600 at synchronizing signal modulation circuit 615, earlier with this surplus ten the dissimilar horizontal/vertical synchronization signals H/V of kind be reduced to single kind of vertical/horizontal synchronizing signal.For example, no matter why are the polarity (may be positive polarity or negative polarity) of the horizontal/vertical synchronization signals of second computer, 200 outputs and kenel (may be combined type or non-combined type), all the polarity with horizontal/vertical synchronization signals H/V is converted to positive polarity (representing with H_in_P and V_in_P), and is the kenel of non-combined type (Non-composite).Afterwards, the horizontal-drive signal H_in_P of positive polarity can export differential driver module 600 to; The vertical synchronizing signal V_in_P of positive polarity then can export synchronizing signal modulation circuit 615 to carry out the modulation of vertical synchronizing signal V.But this area has that the people of common knowledge is also perceptible to be, also the polarity of the horizontal-drive signal of multiple different kenels or vertical synchronization news can be converted to without exception to have negative polarity.
Fig. 3 C illustrates the circuit framework of aforesaid synchronizing signal pre-process circuit 610.Wherein dotted portion is synchronizing signal simplification circuit 620, and remainder is synchronizing signal modulation circuit 615.This area has that the people of common knowledge is also perceptible to be, except realizing with the integrated circuit of a plurality of separation, synchronizing signal pre-process circuit 610 also can be realized by single programmable logic element (for example FPGA or CPLD).
See also Fig. 4 A, as previously mentioned, these differential driver module 600 inside more can comprise three groups of differential driving circuits 601,602,603, correspond to signal of video signal composition RGB, synchronizing signal pre-process circuit 610 and signal generation device 680 respectively.Wherein, the first differential driving circuit 601 more corresponds to a certain composition of signal of video signal composition RGB; The second differential driving circuit 602 more corresponds to another composition of signal of video signal composition RGB; The 3rd differential driving circuit 603 more corresponds to another composition again and the signal generation device 680 of signal of video signal composition RGB.
Still see also Fig. 4 A, in more detail, the first differential driving circuit 601 has a first input end 604A and one second input end 605B, and wherein this first input end 604A receives first composition (for example R composition) of the signal of video signal RGB that this computer exports; This second input end 605B is corresponding to the output terminal of this synchronizing signal pre-process circuit 610, to receive this first pulse wave V
1And this second pulse wave signal V
2Wherein, this first input end 604A is an anode; This second input end 605B is a negative terminal.The first differential driving circuit 601 and the first pulse wave V that synchronizing signal pre-process circuit 610 is exported
1And this second pulse wave signal V
2Load among the first composition R (can be mingled with the first test signal T1) of the signal of video signal that this computer exports, to export one first differential wave D
1To long-distance management device 500 or middle control module 535.Shown in Fig. 3 B, at this first differential wave D
1In the middle of, this first composition R and this first pulse wave V
1And this second pulse wave signal V
2Has opposite polarity.Similarly, the second differential driving circuit 602 also has a first input end 604C and one second input end 605D, wherein this first input end 604C receives the second composition G (can be mingled with the first test signal T1) of the signal of video signal RGB that second computer 200 exports, and the horizontal-drive signal H_in_P (or horizontal-drive signal H) of the positive polarity of synchronizing signal modulation circuit 615 output is loaded among the second composition G of the signal of video signal RGB that second computer 200 exports, to export one second differential wave D
2To long-distance management device 500 or middle control module 535.At this second differential wave D
2In the middle of, this second composition G has opposite polarity with this H_in_P signal.
Still see also Fig. 4 A, similarly, the 3rd differential driving circuit 603 also has a first input end 604E and one second input end 605F, wherein this first input end 604E receives the 3rd composition B (can be mingled with the first test signal T1 in advance) of the signal of video signal RGB that second computer 200 exports, and the second test signal T2 loaded among the 3rd composition B of the signal of video signal RGB that this computer exports, to export one the 3rd differential wave D in suitable time point
3To long-distance management device 500 or middle control module 535.At the 3rd differential wave D
3In the middle of, the 3rd composition B has identical polarity with this first test signal T1; The 3rd composition B has opposite polarity with this second test signal T2.This second test signal T2 is mainly in order to detect the decay of the radio-frequency component that signal of video signal RGB causes because of long Distance Transmission at receiving end.This suitable time point can be vertical synchronizing signal when effective, the normal demonstration of screen is impacted avoiding.The first above-mentioned differential wave D
1, the second differential wave D
2And the 3rd differential wave D
3All transmit at the CAT-5 cable via RJ-45 interface 533.As previously mentioned, the first differential wave D
1, the second differential wave D
2And the 3rd differential wave D
3May all be mingled with the first test signal T1.
Please consult simultaneously shown in Fig. 2 C and the 4B, in the transmission of signal of video signal, this long-distance management device 500 is as the receiving end of signal of video signal RGB and vertical/horizontal synchronizing signal.Shown in Fig. 4 B, except going back primary circuit 900, the differential receiver module 555 of earlier figures 2C more comprises one first differential receiving circuit 556, one second differential receiving circuit 557 and one the 3rd differential receiving circuit 558, and it corresponds to the aforesaid first differential driving circuit 601, the second differential driving circuit 602 and the 3rd differential driving circuit 603 respectively.Wherein, as the first differential wave D from a plurality of computer end modules
1After being sent to long-distance management device 500, earlier via the selection of handover module 550, afterwards again by the first differential receiving circuit 556 of differential receiver module 555 with this first pulse wave V
1And the second pulse wave signal V
2In the single-ended mode of differential commentaries on classics from the first differential wave D
1Central acquisition is come out; The second differential receiving circuit 557 also can be with the horizontal-drive signal H_in_P of positive polarity from the second differential wave D
2In the middle of capture out in the single-ended mode of differential commentaries on classics.Then with the first pulse wave V
1And the second pulse wave signal V
2And the horizontal-drive signal H_in_P of positive polarity all input to the back level go back primary circuit 900.Also primary circuit 900 can be with the first pulse wave V
1And the second pulse wave signal V
2Be reduced to the screen that exports control device 100A behind (identical with the output of second computer 200) vertical synchronizing signal V originally to.This first differential receiving circuit 556 and the second differential receiving circuit 557 also can capture out with the first test signal T1.Above differential receiver module 555 and go back primary circuit 900 and can be collectively referred to as differential reception and go back primary circuit.
Still please consult Fig. 2 C and 4B simultaneously, as the 3rd differential wave D
3After being sent to long-distance management device 500, export relevant compensating circuit to after just capturing the first test signal T1 and the second test signal T2 by the 3rd differential receiving circuit 558, for example the EL9115 and the EL9112 that provide of Intersil company.In the middle of compensating circuit, the first test signal T1 that the first differential receiving circuit 556, the second differential receiving circuit 557 and the 3rd differential receiving circuit 558 are exported can by in twos mutually more each other phase differential to determine the time of RGB composition delay.This goes back primary circuit 900 and mainly comprises a D type flip-flop (D Flip-Flop), and for example integrated circuit 7474.In like manner, in the middle of control module 535 among Fig. 2 C, one group of identical primary circuit 900 of going back is also arranged.In a preferred embodiment, the AD8145 that this differential receiver module 555 provides for Analog Devices company.This interior details of going back primary circuit 900 is specified in down.
Shown in Fig. 4 C, more comprise a demodulator circuit 905, one first polarity adjustment circuit 910, one second polarity adjustment circuit 920 and a decoding circuit 930 at the primary circuit 900 of going back of image receiving end.Wherein, decoding circuit 930 can be according to the aforementioned first pulse wave V
1And the second pulse wave signal V
2Width obtain the first control signal Ctrl_1 and one second control signal Ctrl_2, in order to control the output of first polarity adjustment circuit 910 and second polarity adjustment circuit 920 respectively.The input end of demodulator circuit 905 corresponds to differential receiver module 555, and output terminal corresponds to second polarity adjustment circuit 920.Demodulator circuit 905 will be from the first pulse wave V of differential receiving circuit 555
1And this second pulse wave signal V
2Be converted to the vertical synchronizing signal V_in_P of positive polarity, and then export second polarity adjustment circuit 920 to.Second polarity adjustment circuit 920 can be reduced to vertical synchronizing signal V originally (its polarity may for just also may be for negative) with the vertical synchronizing signal V_in_P of positive polarity according to the second control signal Ctrl_2.In like manner, first polarity adjustment circuit 910 can be reduced to horizontal-drive signal H originally (its polarity may for just also may be for negative) with the horizontal-drive signal H_in_P of positive polarity according to the first control signal Ctrl_1.Vertical synchronizing signal V after the reduction and horizontal-drive signal H all export the screen of control device 100A to.
Shown in Fig. 4 D, demodulator circuit 905 mainly comprises a D type flip-flop (for example integrated circuit 7474) and an exor door (Exclusive OR Gate), for example 74HC86.Demodulator circuit 905 also comprises passive devices such as resistance and electric capacity.
In a preferred embodiment, this first polarity adjustment circuit 910 and second polarity adjustment circuit 920 can be realized by an exor door (Exclusive OR Gate) respectively, for example 74HC86 (its single encapsulation includes four exor doors).Be example with first polarity adjustment circuit 910, its first input end corresponds to the horizontal-drive signal H_in_P of aforementioned positive polarity; Its second input end corresponds to the first control signal Ctrl_1; Its output terminal corresponds to the screen of control device 100A.Similarly, second polarity adjustment circuit 920 also can be realized that its first input end corresponds to aforesaid demodulator circuit 905 by an exor door, to receive the vertical synchronizing signal V_in_P of positive polarity; Its second input end corresponds to the second control signal Ctrl_2; Its output terminal corresponds to the screen of control device.Be example with second polarity adjustment circuit 920, when the polarity of vertical synchronizing signal V originally when negative, second polarity adjustment circuit 920 can be converted to the vertical synchronizing signal V_in_P of positive polarity the vertical synchronizing signal of negative polarity.In addition, because the polarity of vertical synchronizing signal V originally also may be for just, so second polarity adjustment circuit 920 may be not yet the vertical synchronizing signal V_in_P of positive polarity is done any processing (reversal of poles), directly export screen to.In like manner, the people who has common knowledge in this area also can understand 910 pairs of positive polaritys of first polarity adjustment circuit horizontal-drive signal H_in_P the conversion that may carry out.Except realizing with the integrated circuit of a plurality of separation, go back primary circuit 900 and also can be realized by single programmable logic element (for example FPGA or CPLD).
Fig. 5 A to 5D illustrates input and the output waveform of above-mentioned demodulator circuit 905, this first pulse wave V
1Rising edge can trigger out the rising edge of vertical synchronizing signal V_in_P at receiving end; This second pulse wave V
2Rising edge can trigger out the falling edge of vertical synchronizing signal V_in_P at receiving end.In addition shown in Fig. 5 A, this first pulse wave V
1And this second pulse wave signal V
2All has the first pulse bandwidth W
1In the embodiment shown in Fig. 5 B, this first pulse wave V
1And this second pulse wave signal V
2Has the first pulse bandwidth W respectively
1And one second pulse bandwidth W
2In the embodiment shown in Fig. 5 C, this first pulse wave V
1And this second pulse wave signal V
2Has the second pulse bandwidth W respectively
2And one first pulse bandwidth W
1In the embodiment shown in Fig. 5 D, this first pulse wave V
1And this second pulse wave signal V
2All has the second pulse bandwidth W
2
In the present invention, more optionally to this first pulse bandwidth W
1And the second pulse bandwidth W
2Be used.This first pulse bandwidth W
1And the second pulse bandwidth W
2Can be used to transmit a message, this message can allow the receiving end of signal of video signal RGB know originally the polarity of (when being exported by second computer 200) horizontal/vertical synchronization signals H/V.That is, the first pulse bandwidth W
1And the second pulse bandwidth W
2Can represent the numerical value of two bits jointly, its numerical value has represented four kinds of encoded radios (00,01,10,11).Or, the first pulse bandwidth W
1And the second pulse bandwidth W
2Can represent the encoded radio of two group of one bit respectively.So, the receiving end of signal of video signal RGB is unlikely when the reduction synchronizing signal and produces wrong polarity.And the transmission end of signal of video signal RGB (computer end module 530) do not need to transmit extraly one " mode signal " yet and gives receiving end.For example, encoded radio (00) can be positive polarity in order to the vertical/horizontal synchronizing signal of representing 200 outputs of second computer; Encoded radio (01) can be positive polarity in order to the vertical synchronizing signal of representing 200 outputs of second computer, but horizontal-drive signal is negative polarity.For the people who has common knowledge in this area, the meaning of all the other encoded radio representatives can the rest may be inferred.The decoding circuit 930 of Fig. 4 C can produce the first control signal Ctrl_1 and the second control signal Ctrl_2 according to above-mentioned principle, in order to control first polarity adjustment circuit 910 and second polarity adjustment circuit 920 respectively.
For example, as this first pulse bandwidth W
1During more than or equal to one first numerical value, represent this vertical synchronizing signal V and have positive polarity; Or, as this first pulse bandwidth W
1During less than one first numerical value, represent this vertical synchronizing signal V and have negative polarity.Or, as this first pulse bandwidth W
1During more than or equal to one first numerical value, represent this horizontal-drive signal H and have positive polarity; As this first pulse bandwidth W
1During less than one first numerical value, represent this horizontal-drive signal H and have negative polarity.This area have know usually that the knowledgeable can be cognitive be the aforementioned first pulse wave V
1Or the second pulse wave V
2Width all can multiple different array mode wherein may be arranged in order to represent the polarity of horizontal/vertical synchronization signals H/V, so all do not break away from spirit of the present invention.That is, the first pulse bandwidth W
1Can represent the polarity of vertical synchronizing signal V, also can represent the polarity of horizontal-drive signal H, the second pulse bandwidth W
2Can represent the polarity of vertical synchronizing signal V, also can represent the polarity of horizontal-drive signal H.
In order further to explain the running of long-distance management system 50 of the present invention, please get back to Fig. 2 C, the signal of video signal that second computer 200 is exported is sent to control device 100A or middle control computer 110 via computer end module 530 and long-distance management device 500.Be sent to suitable control device 100A, 100B or middle control computer 110 from the signal of video signal RGB of different second computers 200 and via the arrangement path (Routing) of the handover module 550 of long-distance management device 500.User before control device 100A or 100B can select between many second computers 200 by panel button, knob (Knob) or other arbitrarily suitable modes (for example sound control/telepilot/line control machine) of screen display menu (OSD), hot key instruction (hotkeycommands), mousebutton, long-distance management device 500.User before middle control computer 110 then can select between many second computers 200 by the management interface that web browser or other applications provide.In control computer 110 can comprise desktop computer, notebook computer, panel computer, hand-held moving device (for example smart mobile phone) or other can carry out the arithmetic unit (Computing Device) of formula arbitrarily.
Still see also Fig. 2 C, a plurality of differential wave D that transmitted by a plurality of computer end modules 530
1/ D
2/ D
3Input to a differential receiver module (Differential Receiver) 555 after can selecting via the switching of all die change pieces 550, mainly in order to aforesaid differential wave D
1/ D
2/ D
3Be reduced to the signal of video signal of single-ended (single-ended).In addition, this differential receiver module 555 also can be with aforesaid horizontal/vertical synchronization signals (H_in_P and V1﹠amp; V2) and test signal T1 and T2 from differential signal D
1/ D
2/ D
3Middle acquisition is come out.Test signal T1 and T2 use screen use and the correlative compensation circuit for control device 100A to carry out the image compensation value according to this.In a preferred embodiment, this differential receiver module 555 is made of the AD8145 that Analog Devices company provides.In addition, the switching matrix that this handover module 550 is made up of a plurality of multiplexers (Multiplexer) or crosspoint switch (Crosspoint Switch), for example a switching matrix with 40 input ends and five output terminals (40 select five) forming of the AD8177 that is provided by a plurality of Analog Devices company.
In addition, far and near different according to distance between different control device 100A or 100B and the long-distance management device 500, above-mentioned differential receiver module 555 can be positioned in the middle of the housing of long-distance management device 500; Or be arranged in the middle of the corresponding control of another control device 100B module 535.In the time of in the middle of differential receiver module 555 is arranged in control module 535, the distance between long-distance management device 500 and the control device 100B can be extended, because aforementioned differential wave D from computer end module 530
1/ D
2/ D
3In arriving, just can be reduced to single-ended signal of video signal after the control module 535.Control module 535 is in order to extend the distance between a control device 100B (a group of keyboard, screen and cursor control device) and the long-distance management device 500 in this.Control hereinto in the middle of the module 535, also optionally be provided with a screen display menu (OSD) generator (not illustrating) and image compensation circuit (not illustrating).The image compensation circuit is in order to compensate decay and the colour cast (Skew) that signal of video signal causes because of long Distance Transmission.In a preferred embodiment, can be EL9111 or the EL9112 that Intersil company provides in order to the image compensation circuit of compensate for attenuation; Can be the EL9115 that Intersil company provides in order to the image compensation circuit that compensates colour cast.
Please consult Fig. 2 A and 2C simultaneously, in addition, in order to extend the distance between the control computer 110 among long-distance management device 500 and, in the middle of this long-distance management device 500, this first end 510 can further comprise a network interface controller 515.When differential receiver module 555 is positioned in the middle of the housing of long-distance management device 500, the output of this differential receiver module 555 is coupled to a screen (being called the local side screen) or the image processing module 560 of control device 100A, to carry out aforesaid signal of video signal RGB coding and/or compression.And this image processing module 560 can more comprise an analog-to-digital converter (ADC) and a JPEG compression engine, for example the AST1000 that is provided by Taiwan letter Hua (ASPEED) company.And this image processing module 560 can be integrated among the central processing unit 580, for example the AST2100 that is provided by ASPEED.Or this image processing module 560 can be the programmable logic element (Programmable Logic Device) of execution wavelet conversion (WaveletTransform) computing, for example controller, FPGA or CPLD.The person of connecing, control computer 110 during the image data after coding and/or the compression can be sent in the mode of network package by central processing unit 580 and network interface controller 515.Under such framework, in control computer 110 can be on it the combination of web browser, web browser and plug-in or other arbitrarily suitable program and this long-distance management device 500 carry out network communication, for example long-distance management device 500 can send the image of controlled computer 200 outputs to the middle computer 110 of controlling by network.The image compress mode of taking when long-distance management device 500 is when diminishing mode, and middle control computer 110 received image qualities may pass difference to some extent with the image of controlled computer 200 outputs.
In actual applications, the required network bandwidth of transmission data between control computer 110 and second computer 200 in be reducing, above-mentioned coding/or compression process control the reduction of the image quality that computer 110 receives in may causing.That is the image quality that presents on the screen of middle control computer 110 may be somewhat different than the image quality of second computer, 200 actual outputs.In more detail, in the process of the image that acquisition second computer 200 is exported, may reduce the color depth (Color Depth) of the image of second computer, 200 outputs earlier, for example be reduced to 8 bits by 24 bits; In the process of the image that acquisition second computer 200 is exported, may need the conversion (for example being converted to YUV by RGB) of the color coordinate of the advanced circumstances in which people get things ready for a trip, the conversion of this color coordinate may reduce the data (because human eye is more insensitive for the UV composition) of UV composition earlier, for example adopts the conversion regime of YUV:421.In addition, in the process that forms JPEG, the selection of quantization table also may cause the compression that diminishes.But the user still can select suitable coding and/or compress technique, makes the image quality that presents on the screen of the computer 110 of winning be same as the image quality of second computer, 200 actual outputs.
As previously mentioned, in order further to extend the distance between long-distance management device 500 and second computer (controlled computer) 200, in the middle of this long-distance management device 500, this second end 520 can further comprise one or more RS-485 transceiver (Transceiver) 630, in order in the data that exchange other devices that keyboard, mouse or long-distance management device 500 be connected between second computer 200 and the long-distance management device 500, for example keyboard or vernier control signal or the data of virtual media that transmitted by control device 100A.Between a plurality of RS-485 transceivers 630 and central processing unit 580, may have more a programmable logic element (not shown), for example FPGA or CPLD, be converted to the data of single kind of agreement in order to the various protocols data with second computer (controlled computer), 200 external communications, to alleviate the burden with central processing unit 580.The keyboard or the vernier control signal that are transmitted by control device 100A or middle control module 535 can be sent to selected second computer of user 200 corresponding RS-485 transceivers 630 behind analysis (parsing), processing and the arrangement path via central processing unit 580, and RS-485 transceiver 630 is sent to the RS-485 transceiver 630 of corresponding computer end module 530 thus again.In a preferred embodiment, this RS-485 transceiver 630 can be the MAX1483 that ADM485 or MAXIM company provide.Storer 570 is in order to store the related data of the required firmware of central processing unit 580 and aforementioned signal of video signal RGB coding and/or compression.
In long-distance management device 500 of the present invention, also be provided with a USB device control module 700, simulate a USB human-computer interface device (HID), USB mass storage (Mass StorageDevice) or the USB device of other types in order to second computer 200 in correspondence.In more detail, USB device control module 700 can be in the enumeration process of USB, send the description unit (descriptor) of correspondence to second computer 200, make second computer 200 can identify this USB device control module 700, and to its initializing set of being correlated with (configuration) and follow-up USB communication.On second computer 200 of correspondence with analog form produce the USB human-computer interface device make long-distance management device 500 the control device of reality connection can carry out hot plug, do not need to carry out USB more again yet and enumerate (Enumeration) even between the second different computers 200, switch; Simulating a USB mass storage at second computer 200 of correspondence makes long-distance management device 500 that a virtual media (Virtual Media) function can be provided second computer 200 in correspondence.
When long-distance management device 500 direct second computers 200 connected, this USB device control module 700 was in long-distance management device 500; When coupling by computer end module 530 between long-distance management device 500 and second computer 200, this USB device control module 700 is positioned at the housing of computer end module 530.When this USB device control module 700 was positioned at the housing of computer end module 530, as previously mentioned, this USB device control module 700 can be integrated in the master controller 660.
Though aforesaid description and diagram have disclosed preferred embodiment of the present invention, must recognize variously increase, many modifications and replace and may be used in preferred embodiment of the present invention, and can not break away from spirit and the scope of the principle of the invention that defines as claims.Be familiar with this skill person and can know from experience the modification that the present invention may be used in a lot of forms, structure, layout, ratio, material, element and assembly.Therefore, this paper, should be regarded as in order to the present invention to be described in all viewpoints in this embodiment that discloses, but not in order to limit the present invention.Scope of the present invention should be defined by claim, and contains its legal equivalents, is not limited to previous description.
Claims (16)
1. long-distance management system comprises at least:
One computer end module, an end of this computer end module are connected in an image output port of a controlled computer, in order to handle a signal of video signal, a horizontal-drive signal and the vertical synchronizing signal that this controlled computer is exported;
One long-distance management device, one first end of this long-distance management device is coupled to this computer end module via a cable, and another control device that one second end of this long-distance management device can be connected in control end module or a network in the screen, of a control device, makes this group control device, control end module connects in this or a distance supervisor can be via network and this controlled computer generation interactions;
Wherein this computer end module comprises more at least:
One synchronous signal pre-processing circuit, in order to receive this vertical synchronizing signal, and this vertical synchronizing signal is converted to one first pulse wave and one second pulse wave signal, wherein between this first pulse wave and this second pulse wave signal the distance on a time shaft corresponding to the pulse bandwidth of this vertical synchronizing signal, when this vertical synchronizing signal had positive polarity, this first pulse wave was corresponding to the rising edge of this vertical synchronizing signal and this second pulse wave signal falling edge corresponding to this vertical synchronizing signal;
One first differential driving circuit, have a first input end and one second input end, wherein this first input end receives first composition of the signal of video signal that this controlled computer exports, this second input end is corresponding to the output terminal of this synchronizing signal pre-process circuit, to receive this first pulse wave and this second pulse wave signal, and this first pulse wave and this second pulse wave signal are loaded in first composition of the signal of video signal that this controlled computer exports, to export one first differential wave to this long-distance management device;
One second differential driving circuit, have a first input end and one second input end, wherein this first input end receives second composition of the signal of video signal that this controlled computer exports, and this horizontal-drive signal is loaded in second composition of the signal of video signal that this controlled computer exports, to export one second differential wave to this long-distance management device;
Wherein this long-distance management device comprises more at least:
One first differential receiving circuit corresponding to this first differential driving circuit, in order to receiving this first differential wave, and exports this screen to after this first differential wave being reduced to first composition of this signal of video signal;
One second differential receiving circuit corresponding to this second differential driving circuit, in order to receiving this second differential wave, and exports this screen to after this second differential wave being reduced to second composition of this signal of video signal; And
One goes back primary circuit, corresponding to the output terminal of this first differential receiving circuit and this second differential receiving circuit, exports this screen to after in this first differential wave and this second differential wave certainly this vertical synchronizing signal and this horizontal-drive signal being restored.
2. long-distance management system as claimed in claim 1, it is characterized in that, this long-distance management device comprises all die change pieces at least, this handover module with this controlled computer or another controlled computer be coupled to a screen of this control device, control end module or this network in this, in order between this controlled computer or this another controlled computer, to switch.
3. long-distance management system as claimed in claim 1 is characterized in that, this computer end module more is connected in an input port of this controlled computer, and the steering order of being sent with keyboard or the cursor control device with this control device inputs to this controlled computer.
4. long-distance management system as claimed in claim 1 is characterized in that, this synchronizing signal pre-process circuit more comprises a JK flip-flop.
5. long-distance management system as claimed in claim 1 is characterized in that, this is gone back primary circuit and more comprises a D type flip-flop.
6. long-distance management system as claimed in claim 1 is characterized in that, this synchronizing signal pre-process circuit has more a synchronous signal simplification circuit, in order to this horizontal-drive signal is converted to without exception a horizontal-drive signal with positive polarity.
7. long-distance management system as claimed in claim 1 is characterized in that, this long-distance management device more comprises a RS485 transceiver, exports this computer end module in order to a keyboard or the mouse signal that this control device is sent, and then controls this controlled computer.
8. long-distance management system as claimed in claim 1 is characterized in that, this synchronizing signal pre-process circuit is more adjusted the pulse bandwidth of this first pulse wave or this second pulse wave signal according to the polarity of this horizontal-drive signal or this vertical synchronizing signal.
9. long-distance management system as claimed in claim 1, it is characterized in that, the encoded radio of one group of two bit of the more common representative of the width of this first pulse wave and this second pulse wave signal or represent the encoded radio of two group of one bit individually is in order to represent the polarity of this vertical synchronizing signal or this horizontal-drive signal.
10. method for remote management, this method for remote management comprises the following step:
One long-distance management system is provided, and this long-distance management system has a transmission end and a receiving end;
This transmission end is connected in an image output port of a controlled computer, to handle a signal of video signal, a horizontal-drive signal and the vertical synchronizing signal that this controlled computer is exported, wherein this transmission end comprises a synchronous signal pre-processing circuit, one first differential driving circuit and one second differential driving circuit;
This receiving end is coupled to this transmission end via a cable, and wherein this receiving end comprises one first differential receiving circuit, one second differential receiving circuit and is gone back primary circuit;
This receiving end is coupled in the screen, of a control device and controls computer in the control module or, make another control device that this control device, this control device connect or should in the control computer can produce interactive with this controlled computer;
Receive this vertical synchronizing signal in this transmission end with this synchronizing signal pre-process circuit, and this vertical synchronizing signal is modulated to one first pulse wave and one second pulse wave signal, wherein between this first pulse wave and this second pulse wave signal the distance on this time shaft corresponding to the pulse bandwidth of this vertical synchronizing signal, when this vertical synchronizing signal has positive polarity, trigger out this first pulse wave and trigger out this second pulse wave signal with the falling edge of this vertical synchronizing signal with the rising edge of this vertical synchronizing signal;
Receive this first composition of the signal of video signal that this controlled computer exported with the first input end of this first differential driving circuit in this transmission end;
Receive this first pulse wave and this second pulse wave signal in this transmission end with second input end of this first differential driving circuit;
With this first differential driving circuit this first pulse wave and this second pulse wave signal are loaded in this first composition of the signal of video signal that this controlled computer exported, to export one first differential wave in this transmission end;
Receive this second composition of this signal of video signal that this controlled computer exported with the first input end of this second differential driving circuit in this transmission end;
With this second differential driving circuit this horizontal-drive signal is loaded in second composition of the signal of video signal that this controlled computer exported, to export one second differential wave in this transmission end;
Going back first composition that primary circuit is reduced to this first differential wave this vertical synchronizing signal and this signal of video signal with this first differential receiving circuit and this after, this receiving end exports this screen to; And
Going back second composition that primary circuit is reduced to this second differential wave this horizontal-drive signal and this signal of video signal with this second differential receiving circuit and this after, receiving end exports this screen to.
11. method for remote management as claimed in claim 10 is characterized in that, further comprises:
This long-distance management system is coupled to another this controlled computer;
With one of this long-distance management system switch this screen that circuit is coupled to this control device, in this control module or should in control computer and this controlled computer or this another this controlled computer, make this controlled computer or another this controlled computer can this control device, in this control module or should in switch between the control computer.
12. method for remote management as claimed in claim 10 is characterized in that, further comprises:
This transmission end is connected to an input port of this controlled computer, and a steering order of being sent with a keyboard or a mouse with this control device inputs to this controlled computer by this input port.
13. method for remote management as claimed in claim 10 is characterized in that, further comprises:
Export a keyboard signal or the mouse signal that this control device was sent to this transmission end at this receiving end with a RS-485 transceiver, and then control this computer.
14. method for remote management as claimed in claim 10 is characterized in that, further comprises:
Adjust the pulse bandwidth that this first pulse wave or this second pulse wave signal comprise in this transmission end according to the polarity of this horizontal-drive signal or this vertical synchronizing signal, with the common encoded radio that represents the encoded radio of one group of two bit or represent two group of one bit individually of the width of this first pulse wave and this second pulse wave signal, for the polarity of this this vertical synchronizing signal of receiving end identification or this horizontal-drive signal.
15. method for remote management as claimed in claim 10 is characterized in that, further comprises:
In the transmission end one test signal is loaded in this first differential wave, to carry out image compensation at this receiving end.
16. a method for remote management, this method for remote management comprises the following step:
One long-distance management system is provided, and this long-distance management system has a transmission end and a receiving end;
This transmission end is connected in an image output port of a controlled computer, to handle a signal of video signal, a horizontal-drive signal and the vertical synchronizing signal that this controlled computer is exported;
This receiving end is coupled to this transmission end via a cable;
This receiving end is coupled in the screen, of a control device and controls computer in the control module or, make another control device that this control device, this control device connect or should in the control computer can produce interactive with this controlled computer;
Receive this vertical synchronizing signal in this transmission end, and this vertical synchronizing signal is modulated to one first pulse wave and one second pulse wave signal, wherein between this first pulse wave and this second pulse wave signal the distance on this time shaft corresponding to the pulse bandwidth of this vertical synchronizing signal, when this vertical synchronizing signal has positive polarity, trigger out this first pulse wave and trigger out this second pulse wave signal with the falling edge of this vertical synchronizing signal with the rising edge of this vertical synchronizing signal;
Receive this first composition of the signal of video signal that this controlled computer exports in this transmission end;
Receive this first pulse wave and this second pulse wave signal in this transmission end;
This first pulse wave and this second pulse wave signal are loaded in this first composition of the signal of video signal that this controlled computer exports, to export one first differential wave in this transmission end;
Receive this second composition of this signal of video signal that this controlled computer exports in this transmission end;
This horizontal-drive signal is loaded in second composition of the signal of video signal that this controlled computer exports, to export one second differential wave in this transmission end;
Export this screen to after this first differential wave being reduced to first composition of this vertical synchronizing signal and this signal of video signal at this receiving end; And
Export this screen to after this second differential wave being reduced to second composition of this horizontal-drive signal and this signal of video signal at receiving end.
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| TW100150052A TWI448906B (en) | 2011-12-30 | 2011-12-30 | Remote management system and remote management method thereof |
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| CN107588726A (en) * | 2016-07-08 | 2018-01-16 | 欧姆龙株式会社 | Optical instrumentation device |
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| TWI623227B (en) * | 2014-04-15 | 2018-05-01 | 宏正自動科技股份有限公司 | Video transmission system |
| JP7037289B2 (en) * | 2017-06-26 | 2022-03-16 | 三菱重工業株式会社 | Control switching device, plant, control switching method and program |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103186248B (en) | 2016-06-15 |
| TWI448906B (en) | 2014-08-11 |
| TW201327201A (en) | 2013-07-01 |
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