CN108471512A - A kind of hot standby transmission device of HD video dual link - Google Patents
A kind of hot standby transmission device of HD video dual link Download PDFInfo
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- CN108471512A CN108471512A CN201810122232.2A CN201810122232A CN108471512A CN 108471512 A CN108471512 A CN 108471512A CN 201810122232 A CN201810122232 A CN 201810122232A CN 108471512 A CN108471512 A CN 108471512A
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- dvi
- edid
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/108—Adaptations for transmission by electrical cable the cable being constituted by a pair of wires
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Optical Communication System (AREA)
Abstract
The present invention provides a kind of hot standby transmission devices of HD video dual link, include the transmitters and receivers of interconnection.The transmitter includes power conversion module, input module, output module, EDID modules and control unit；The receiver includes receiver power supply conversion module, dual link receiving module, DVI output modules and receiver control unit；The advantages of being transmitted present invention incorporates twisted-pair feeder and optical fiber, twisted-pair feeder survivability is strong, and the good confidentiality of optical fiber transmission, the hidden danger of electromagnetic leakage, transmission range be not long；Optical fiber link and the vision signal of twisted pair wire links transmission are lossless high-definition video signal, ensure that the consistency of display picture.
Description
Technical field
The present invention relates to field of video transmission, especially a kind of hot standby transmission device of HD video dual link.
Background technology
Currently, in the design, construction of meeting quality audio and video system, twisted-pair feeder is often used between transmitter and receiver
Or optical fiber transmits HD video.It is cheap using twisted-pair feeder using the business machine of Double-strand transmission HD video, using extensive, anti-
The strong feature of ruining property is transmission medium using cat5e or cat6 twisted-pair feeders, transmits the distance of HD video up to 100 meters；It adopts
The business machine that HD video is transmitted with optical fiber the characteristics of small, good confidentiality, long transmission distance, is used using optical fiber electromagnetic radiation
Multimode or single mode optical fiber are transmission medium, transmit the distance of HD video up to 300 meters or more.
The equipment for having dual link transmission HD video on the market, as used two single mode lists between transmitters and receivers
Core fibre connects, wherein any one optical fibre damage, does not affect the transmission of HD video.But fiber medium is by glass
Or fiber made of plastics, shock resistance, survivability are poor.Medium only with optical fiber as high-definition video signal wire transmission, it is difficult
To meet conference centre, charge center to the high request of survivability.
The equipment for also having dual link transmission HD video on the market is being sent in conjunction with optical fiber transmission and IP encoding and decoding techniques
Use optical fiber and twisted pair line connection, wherein twisted pair line connection that can pass through multiple switch, transmission range between device and receiver
It is farther.Seem, this equipment combines optical fiber transmission and the characteristics of Double-strand transmission.But this equipment is in twisted-pair feeder chain
The signal of road transmission, is the IP data packets by compressed encoding, and the HD video exported after receiving terminal decoding decompression is drawn
Compared with the lossless no compression high definition video that optical fiber link transmits, image quality difference is apparent in face, destroys the picture one that video is shown
Cause property.Further, since using IP encoding and decoding techniques in twisted pair wire links, the delay for transmitting HD video is big, in hot standby chain
In the handoff procedure of road, it can lead to bright aobvious splashette, blank screen phenomenon occur in the display equipment that receiver connect.
Invention content
Goal of the invention：The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of high definition to regard
The hot standby transmission device of frequency dual link.
In order to solve the above technical problem, the present invention provides a kind of hot standby transmission devices of HD video dual link, including
The transmitters and receivers of interconnection.
In the present invention, the transmitter includes power conversion module, input module, output module, EDID modules and control
Unit；
Power conversion module includes AC power input interface, power switch, AC-DC units and DC-DC units；
Input module includes DVI input interfaces, DVI input units, DVI allocation units, and DVI input interfaces are DVI-I female
Seat receives DVI signals and the DVI signals of input is divided into three tunnels after DVI input units and DVI allocation units；
Output module include DVI output units, DVI rings outgoing interface, electrical/optical conversion with processing unit, LC optical fiber interfaces,
HDBaseT transmission circuits and RJ45 mouthfuls, DVI allocation units are by three tunnels of the DVI signals of input point：The first via is single by DVI outputs
It is exported from DVI ring outgoing interfaces after member, DVI ring outgoing interfaces are DVI-I female seats, export DVI signals, for connecing local display device prison
Depending on video source；Second tunnel becomes optical signal with processing unit by electrical/optical conversion and is exported from LC optical fiber interfaces；Third road is passed through
HDBaseT transmission circuits are exported from RJ45 mouthfuls, from LC optical fiber interfaces and the RJ45 mouthfuls of signals exported respectively via optical fiber and multiple twin
Line constitutes the transmitting terminal of the hot standby transmission of dual link of HD video；
EDID modules include EDID control interfaces, EDID administrative units, EDID storage chips, and EDID modules are by control unit
Control, change is stored in EDID information in EDID storage chips；
Control unit includes that processor and EDID read button, and processor passes through EDID control interfaces and EDID administrative units
Communication, when transmitter on works normally, local display device is connect with DVI ring outgoing interfaces, is pressed EDID and is read button,
Processor control EDID administrative units read the EDID information in local display device that DVI ring outgoing interfaces are connected, by this
In EDID information storages to EDID storage chips, whole process is completed for about 2 seconds, and EDID storage chips are non-volatile memories
Device remains to keep EDID information after power down, and in normal use, the video source that DVI input interfaces are connect manages list by EDID
Member reads the EDID information in EDID storage chips, and the video format to ensure transmission is correct.
In the present invention, the receiver includes receiver power supply conversion module, dual link receiving module, DVI output modules
With receiver control unit；
Receiver power supply converting unit includes AC power input interface, power switch, AC-DC units and DC-DC units,
220V alternating currents are switched to the DC voltage needed for receiver operation by receiver power supply converting unit；
Dual link receiving module includes that LC optical fiber interfaces, optical electrical conversion and processing unit, RJ45 mouthfuls, HDBaseT receive electricity
Road, signal deteching circuit 1, signal deteching circuit 2, by LC optical fiber interfaces, optical electrical conversion will be from single mode optical fiber with processing unit
The optical signal of reception is converted to DVI signals, and by RJ45 mouthfuls, HDBaseT receiving circuits will be converted from twisted-pair feeder received signal
For DVI signals, the DVI signals converted out from optical electrical conversion with processing unit and HDBaseT receiving circuits pass through signal respectively
It is sent after detection circuit 1 and signal deteching circuit 2 to DVI output modules；
DVI output modules include DVI selecting units, seamless switching unit, DVI output units and DVI output interfaces, DVI
Selecting unit chooses the DVI signals that signal deteching circuit 1 and signal deteching circuit 2 export, and send to seamless switching unit, no seaming and cutting
It changes unit and seamless processing is done to DVI signals using the method for caching frame, to ensure after certain link signal is lost, be switched to another
The integrality that picture is shown when one link connects by the DVI signals Jing Guo seamless processing via DVI output units from DVI outputs
Mouth is sent to distal displayed equipment；
Receiver control unit includes processor and RS-232 interface, processor real-time reception signal deteching circuit 1 and letter
Number detection circuit 2 the presence or absence of sends the indication signal of DVI signals, which DVI signals are control DVI selecting units select, when
Signal deteching circuit 1 detects the DVI signals of optical electrical conversion and processing unit output, and signal deteching circuit 2 does not detect
When the DVI signals of HDBaseT receiving circuits output, processor controls 1 output of DVI selecting unit selection signals detection circuit
DVI signals；When signal deteching circuit 1 does not detect the DVI signals of optical electrical conversion and processing unit output, and signal detection
When circuit 2 detects the DVI signals of HDBaesT receiving circuits output, processor controls DVI selecting unit selection signals detection electricity
The DVI signals that road 2 exports；When signal deteching circuit 1 and signal deteching circuit 2 detect DVI signals, processor is according to excellent
The setting of first grade controls DVI selecting unit selection signals.
In the present invention, the transmitter includes transmitter front panel, transmitter front panel be equipped with DVI input interfaces,
EDID reads button, DVI rings outgoing interface, AC power input interface and power switch.
In the present invention, the transmitter includes transmitter rear panel, transmitter rear panel be equipped with LC optical fiber interfaces and
RJ45 mouthfuls.
In the present invention, the receiver includes receiver front panel, and receiver front panel is equipped with LC optical fiber interfaces, RJ45
Mouth, DVI output interfaces and RS-232 interface.
In the present invention, the receiver includes receiver rear panel, and receiver rear panel is equipped with AC power input and connects
Mouth and power switch.
In the present invention, the receiver is connected with transmitter by single mode optical fiber.
In the present invention, the receiver and transmitter pass through twisted pair line connection.
In the present invention, the receiver is connected with transmitter by matrix.
1, the advantages of being transmitted present invention incorporates twisted-pair feeder and optical fiber, twisted-pair feeder survivability is strong, the confidentiality of optical fiber transmission
Good, the hidden danger of electromagnetic leakage, transmission range be not long；
2, optical fiber link and the vision signal of twisted pair wire links transmission are lossless high-definition video signal, ensure that display picture
The consistency in face；
3, receiver can be arranged by serial ports preferentially to select to receive signal from optical fiber link or twisted pair wire links；
4, receiver has the function of detecting link signal automatically, when being used cooperatively with transmitter, when a certain link occurs
Automatic seamless switches to another link when failure, and viewer can not perceive the generation of failure, can significantly improve HD video biography
The reliability of defeated system；
5, this transmission device operates with simple, easy to maintain.Transmitter and receiver directly single-link can connect, are double
Link connection, by matrix transfer etc., have a variety of occupation modes.
Description of the drawings
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, it is of the invention above-mentioned or
Otherwise advantage will become apparent.
Fig. 1 is the composition figure of the transmitters and receivers of the present invention.
Fig. 2 and Fig. 3 is the transmitter front panel and rear panel schematic diagram of the present invention respectively.
Fig. 4 a and Fig. 4 b are the receiver front panel and rear panel schematic diagram of the present invention respectively.
Fig. 5 a and Fig. 5 b are the transmitter architecture schematic diagrames of the present invention.
Fig. 6 a and Fig. 6 b are the receiver architecture schematic diagrames of the present invention.
Fig. 7 a are the application example connection diagrams one of the present invention.
Fig. 7 b are the application example connection diagrams two of the present invention.
Fig. 7 c are the application example connection diagrams three of the present invention.
Fig. 7 d are the application example connection diagrams four of the present invention.
Specific implementation mode
It elaborates to the present invention below in conjunction with attached drawing.
The hot standby transmission device of HD video dual link includes transmitter 1 and receiver 2, and transmitter 1 and receiver 2 are box
Formula equipment is mounted in workbench or cabinet.
As shown in Figure 1, transmitter 1 includes power conversion module, input module, output module, EDID modules, control list
Member.Wherein, power conversion module includes AC power input interface 1-1, power switch 1-2, AC-DC unit 1-3, DC-DC mono-
220V alternating currents are switched to the direct current in transmitter needed for the work of other circuits by first 1-4.
Input module includes DVI input interface 1-12, DVI input unit 1-13, DVI allocation units 1-14, DVI inputs
Interface 1-12 is DVI-I female seats, and receiving DVI signals will input after DVI input unit 1-13 and DVI allocation units 1-14
DVI signals be divided into three tunnels.
Output module include DVI output unit 1-11, DVI ring outgoing interfaces 1-10, electrical/optical conversion with processing unit 1-15,
1-17, RJ45 mouthfuls of 1-18 of LC optical fiber interfaces 1-16, HDBaseT transmission circuit.DVI allocation units 1-14 is by the DVI signals of input
Divide three tunnels：It is exported all the way from DVI ring outgoing interfaces 1-10 after DVI output units 1-11, DVI ring outgoing interfaces 1-10 is DVI-I
Female seat exports DVI signals, and video source is monitored for connecing local display device；Pass through electrical/optical conversion and processing unit 1-15 all the way
Become optical signal to export from LC optical fiber interfaces 1-16；It is exported all the way from RJ45 mouthfuls of 1-18 by HDBaseT transmission circuits 1-17.
The signal exported from 1-16 and RJ45 mouthfuls of 1-18 of LC optical fiber interfaces constitutes the double-strand of HD video respectively via optical fiber and twisted-pair feeder
The transmitting terminal of the hot standby transmission in road.HDBaseT transmission circuits 1-17 is the chip for the standard manufacture for following the formulation of HDBaseT alliances
Circuit.
EDID modules include EDID control interface 1-7, EDID administrative unit 1-6, EDID storage chips 1-9.EDID modules
For being controlled by control unit, change is stored in the EDID information in EDID storage chips 1-9.EDID is Extended
Display Identification Data (extending display identification data).
Control unit includes that processor 1-8 and EDID read button 1-5.It is selected in processor 1-8 the application
ATMEGA162 models, processor 1-8 are communicated by EDID control interface 1-7 with EDID administrative units 1-6.Work as transmitter on
When normal work, local display device is connect with DVI ring outgoing interfaces 1-10, is pressed EDID and is read button 1-5, processor 1-8 controls
EDID administrative units 1-6 processed reads the EDID information in local display device that DVI ring outgoing interfaces 1-10 is connected, by the EDID
In information storage to EDID storage chips 1-9, whole process is completed for about 2 seconds.EDID storage chips 1-9 is non-volatile deposits
Reservoir remains to keep EDID information after power down.In normal use, the video source that DVI input interfaces 1-12 is connect passes through EDID
Administrative unit 1-6 reads the EDID information in EDID storage chips 1-9, and the video format to ensure transmission is correct.
Receiver 2 includes power conversion module, dual link receiving module, DVI output modules, control unit.Wherein, power supply
Converting unit includes AC power input interface 2-13, power switch 2-14, AC-DC unit 2-15, DC-DC unit 2-16, is incited somebody to action
220V alternating currents switch to the DC voltage needed for the work of receiver other parts circuit.
Dual link receiving module include LC optical fiber interfaces 2-1, optical electrical conversion with 2-3, RJ45 mouthfuls of 2-2 of processing unit,
HDBaseT receiving circuits 2-4, signal deteching circuit 12-5, signal deteching circuit 22-6.Pass through LC optical fiber interface 2-1, optical electrical
The optical signal received from single mode optical fiber is converted to DVI signals by conversion with processing unit 2-3.Pass through RJ45 mouthfuls of 2-2, HDBaseT
Receiving circuit 2-4 will be converted to DVI signals from twisted-pair feeder received signal.From optical electrical conversion with processing unit 2-3 and
The DVI signals that HDBaseT receiving circuits 2-4 is converted out are respectively after signal deteching circuit 12-5 and signal deteching circuit 22-6
It send to DVI output modules.
DVI output modules include DVI selecting units 2-8, seamless switching unit 2-9, DVI output unit 2-10, DVI defeated
Outgoing interface 2-11.DVI selecting units 2-8 chooses the DVI letters of signal deteching circuit 12-5 and signal deteching circuit 22-6 outputs
Number, it send to seamless switching unit 2-9.Seamless switching unit 2-9 does seamless processing using the method for caching frame to DVI signals, with
Ensure after certain link signal is lost, the integrality of picture is shown when being switched to another link, it will be by seamless processing
DVI signals are sent from DVI output interfaces 2-11 to distal displayed equipment via DVI output unit 2-10.
Control unit includes processor 2-7, RS-232 interface 2-12.Processor 2-7 real-time reception signal deteching circuits 12-
5 and signal deteching circuit 22-6 the presence or absence of sends the indication signal of DVI signals, to control DVI selecting units 2-8 selections which
DVI signals all the way.When signal deteching circuit 12-5 detects the DVI signals of optical electrical conversion and processing unit 2-3 output, and
When signal deteching circuit 22-6 does not detect the DVI signals of HDBaseT receiving circuits 2-4 outputs, processor 2-7 controls DVI
The DVI signals of selecting unit 2-8 selection signal detection circuits 12-5 outputs；When signal deteching circuit 12-5 do not detect light/
The DVI signals of electricity conversion and processing unit 2-3 outputs, and signal deteching circuit 22-6 detects HDBaesT receiving circuits 2-4
When the DVI signals of output, processor controls the DVI signals of DVI selecting unit 2-8 selection signal detection circuits 22-6 outputs；When
When signal deteching circuit 12-5 and signal deteching circuit 22-6 detect DVI signals, processor 2-7 is according to the setting of priority
Control DVI selecting unit 2-8 selection signals, such as the signal of preferential selection signal detection circuit 12-5 outputs, or preferential selection
The signal of signal deteching circuit 22-6 outputs.By RS-232 interface 2-12, instruction is sent to processor 2-7, can be changed excellent
The setting of first grade.
Fig. 2 is the transmitter front panel schematic diagram of the present invention.Be arranged on transmitter front panel DVI input interfaces 1-12,
EDID reads button 1-5, DVI ring outgoing interface 1-10, AC power input interface 1-1, power switch 1-2.In use, DVI is defeated
" DVI inputs " printed words are marked under incoming interface 1-12, are DVI-I female seats, which connects video source, and DVI signals are inputted from video source.
" DVI rings go out " printed words are marked under DVI ring outgoing interfaces 1-10, are DVI-I female seats, which connects local display device, for showing
Video pictures.EDID reads and marks " EDID " under button 1-5, and the button is for rewriting the letter being stored in EDID storage chips
Breath." AC 220V " printed words are marked under AC power input interface 1-1, connect 220V alternating currents.Left side is equipped with a power supply indicator,
" PWR " printed words are marked under indicator light.When AC power input is normal, power supply indicator is lighted, for green.Power switch 1-2
For two gear switch of ship type, "ON", "Off" printed words, the power-up for controlling transmitter are indicated respectively up and down.
Fig. 3 is the transmitter rear panel schematic diagram of the present invention.On transmitter rear panel be arranged LC optical fiber interfaces 1-16 and
RJ45 mouthfuls of 1-18 constitute the dual link output of HD video." light output " printed words are marked under LC optical fiber interfaces 1-16, are single LC
Optical fiber interface connects single mode optical fiber.There are an indicator light in the lower rights LC optical fiber interface 1-16, and for showing optical fiber link, whether there is or not even
It connects." twisted-pair feeder output " printed words are marked under RJ45 mouthfuls of 1-18, connect twisted-pair feeder.There are four LED lights for RJ45 mouthfuls of both sides, divide
It is not：Power, power supply indicator, power work ordinary duration are bright；Link, link connection LED, link connection ordinary duration
It is bright；Operation, work light, when normal work, flicker；HDCP, HDCP agreement indicator light, signal source have HDCP agreements
When lamp length it is bright, signal source does not have to flicker when HDCP agreements.
Fig. 4 a are the receiver front panel schematic diagram of the present invention.LC optical fiber interfaces 2-1, RJ45 are set on receiver front panel
Mouth 2-2, DVI output interface 2-11 and RS-232 interface 2-12." light input " printed words are marked under LC optical fiber interfaces 2-1, are single
LC optical fiber interfaces connect single mode optical fiber.There is an indicator light in the interface lower right, for showing whether optical fiber link is normal.RJ45
" twisted-pair feeder input " printed words are marked under mouth 2-2, connect twisted-pair feeder.There are four LED lights for RJ45 mouthfuls of both sides, respectively：
Power, power supply indicator, power work ordinary duration are bright；Link, link connection LED, link connection ordinary duration are bright；
Operation, work light, when normal work, flicker；HDCP, HDCP agreement indicator light, lamp when signal source has HDCP agreements
Length is bright, and signal source does not have to flicker when HDCP agreements." DVI outputs " printed words are marked under DVI output interfaces 2-11, are DVI-I female
Seat exports high-definition video signal, connects distal displayed equipment." RS-232 " printed words are marked under RS-232 interface 2-12, are DB9 female
Seat preferentially selects optical fiber link or twisted pair wire links for changing in dual link transmission.Pass through place of the interface into receiver
It manages device 2-7 and sends serial ports instruction, instruction 0xFF000A0100AA is that optical fiber link is preferential, and instruction 0xFF000A0200AA is multiple twin
Wired link is preferential, and after processor 2-7 receives instruction, control DVI selecting units 2-8 preferentially selects corresponding link.
Fig. 4 b are the receiver rear panel schematic diagram of the present invention.Receiver rear panel is equipped with AC power input interface
2-13 and power switch 2-14." AC 220V " printed words are marked under AC power input interface 2-13, connection 220V is handed over when use
Galvanic electricity, for providing power supply to receiver.Power switch 2-14 is two gear switch of ship type, marks "ON", "Off" word respectively up and down
Sample, for controlling and receiving device power-up.
Fig. 5 is the transmitter architecture schematic diagram of the present invention.
Fig. 6 is the receiver architecture schematic diagram of the present invention.
Fig. 7 a, 7b, 7c, 7d are the application example connection diagrams of the present invention.
It is the transmitter of the present invention and the occupation mode that receiver is directly connected to as shown in Fig. 7 a, Fig. 7 b and Fig. 7 c.Wherein
Fig. 7 a show between transmitters and receivers the case where order mode fiber, and Fig. 7 b are shown between transmitters and receivers only
The case where connecing twisted-pair feeder.Both of these case is single-link connection type, is suitble to only exist one kind between transmitters and receivers
The situation of cable.Once link transmission breaks down or circuit is damaged, the high-definition video signal of video source can not be just transferred to far
End is shown in equipment.Fig. 7 c show between transmitters and receivers while connecting single mode optical fiber and twisted-pair feeder, constitute high definition and regard
The hot standby transmission of dual link of frequency.No matter which link transmission breaks down or circuit is damaged, and receiver automatically switches to another chain
The HD video of road transmission, it is ensured that the high-definition video signal of video source output is normally shown in distal displayed equipment.Moreover, figure
Occupation mode shown in 7c combine twisted-pair feeder survivability is strong, optical fiber does not have electromagnetic radiation, good confidentiality, long transmission distance it is excellent
Point greatly strengthens the reliability of high-resolution video transfer system.
As shown in figure 7d, the occupation mode connected by matrix between the transmitter and receiver of the present invention.Transmitter
Optical fiber output and twisted-pair feeder output be respectively connected to high definition hybrid matrix 1 optical fiber input and high definition hybrid matrix 2 twisted-pair feeder
The optical fiber that input, the optical fiber output of high definition hybrid matrix 1 and the twisted-pair feeder output of high definition hybrid matrix 2 are respectively connected to receiver is defeated
Enter and inputted with twisted-pair feeder, constitutes the backup of high-definition video matrix.High definition hybrid matrix 1 and the output of high definition hybrid matrix 2 extremely receive
The vision signal of device can be the same or different.Either high definition hybrid matrix 1 or high definition hybrid matrix 2 breaks down and leads
When transmission being caused to realize, the vision signal automatic seamless of receiver is routed to another chain road, ensures that distal displayed equipment continues work
Make.The reliability and stability of transmission of video switching system is greatly strengthened using this connection type.
The present invention provides a kind of hot standby transmission device of HD video dual link, implement the technical solution method and
There are many approach, the above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.All undefined components in this embodiment can be implemented in the prior art.
Claims (10)
1. a kind of hot standby transmission device of HD video dual link, which is characterized in that the transmitters and receivers including interconnection.
2. a kind of hot standby transmission device of HD video dual link according to claim 1, which is characterized in that the transmitter
Including power conversion module, input module, output module, EDID modules and control unit；
Power conversion module includes AC power input interface, power switch, AC-DC units and DC-DC units；
Input module includes DVI input interfaces, DVI input units, DVI allocation units, and DVI input interfaces are DVI-I female seats, are connect
It receives DVI signals and the DVI signals of input is divided into three tunnels after DVI input units and DVI allocation units；
Output module include DVI output units, DVI rings outgoing interface, electrical/optical conversion with processing unit, LC optical fiber interfaces,
HDBaseT transmission circuits and RJ45 mouthfuls, DVI allocation units are by three tunnels of the DVI signals of input point：The first via is single by DVI outputs
It is exported from DVI ring outgoing interfaces after member, DVI ring outgoing interfaces are DVI-I female seats, export DVI signals, for connecing local display device prison
Depending on video source；Second tunnel becomes optical signal with processing unit by electrical/optical conversion and is exported from LC optical fiber interfaces；Third road is passed through
HDBaseT transmission circuits are exported from RJ45 mouthfuls, from LC optical fiber interfaces and the RJ45 mouthfuls of signals exported respectively via optical fiber and multiple twin
Line constitutes the transmitting terminal of the hot standby transmission of dual link of HD video；
EDID modules include EDID control interfaces, EDID administrative units, EDID storage chips, and EDID modules are controlled by control unit
System, change are stored in the EDID information in EDID storage chips；
Control unit includes processor and EDID reads button, and processor is logical by EDID control interfaces and EDID administrative units
Letter, when transmitter on works normally, local display device is connect with DVI ring outgoing interfaces, is pressed EDID and is read button, processing
Device control EDID administrative units read the EDID information in local display device that DVI ring outgoing interfaces are connected, which is believed
In breath storage to EDID storage chips, EDID storage chips are nonvolatile memory, remain to keep EDID information after power down,
When normal use, the video source that DVI input interfaces are connect reads the EDID letters in EDID storage chips by EDID administrative units
Breath, the video format to ensure transmission are correct.
3. a kind of hot standby transmission device of HD video dual link stated according to claim 2, which is characterized in that the receiver packet
Include receiver power supply conversion module, dual link receiving module, DVI output modules and receiver control unit；
Receiver power supply converting unit includes AC power input interface, power switch, AC-DC units and DC-DC units, is received
220V alternating currents are switched to the DC voltage needed for receiver operation by device power conversion unit；
Dual link receiving module include LC optical fiber interfaces, optical electrical conversion with processing unit, RJ45 mouthfuls, HDBaseT receiving circuits,
Signal deteching circuit 1, signal deteching circuit 2, by LC optical fiber interfaces, optical electrical conversion will connect with processing unit from single mode optical fiber
The optical signal of receipts is converted to DVI signals, and by RJ45 mouthfuls, HDBaseT receiving circuits will be converted to from twisted-pair feeder received signal
DVI signals, the DVI signals converted out from optical electrical conversion with processing unit and HDBaseT receiving circuits pass through signal detection respectively
It is sent after circuit 1 and signal deteching circuit 2 to DVI output modules；
DVI output modules include DVI selecting units, seamless switching unit, DVI output units and DVI output interfaces, DVI selections
The DVI signals that unit selection signal deteching circuit 1 and signal deteching circuit 2 export, send to seamless switching unit, seamless switching list
Member does seamless processing using the method for caching frame to DVI signals, to ensure after certain link signal is lost, is switched to another
The integrality that picture is shown when link is sent by the DVI signals Jing Guo seamless processing via DVI output units from DVI output interfaces
To distal displayed equipment；
Receiver control unit includes processor and RS-232 interface, and processor real-time reception signal deteching circuit 1 and signal are examined
Slowdown monitoring circuit 2 the presence or absence of sends the indication signal of DVI signals, which DVI signals are control DVI selecting units select, work as signal
Detection circuit 1 detects the DVI signals of optical electrical conversion and processing unit output, and signal deteching circuit 2 does not detect
When the DVI signals of HDBaseT receiving circuits output, processor controls 1 output of DVI selecting unit selection signals detection circuit
DVI signals；When signal deteching circuit 1 does not detect the DVI signals of optical electrical conversion and processing unit output, and signal detection
When circuit 2 detects the DVI signals of HDBaesT receiving circuits output, processor controls DVI selecting unit selection signals detection electricity
The DVI signals that road 2 exports；When signal deteching circuit 1 and signal deteching circuit 2 detect DVI signals, processor is according to excellent
The setting of first grade controls DVI selecting unit selection signals.
4. a kind of hot standby transmission device of HD video dual link according to claim 3, which is characterized in that the transmitter
Including transmitter front panel, transmitter front panel is equipped with DVI input interfaces, EDID reads button, DVI rings outgoing interface, exchanges
Power input interface and power switch.
5. a kind of hot standby transmission device of HD video dual link according to claim 4, which is characterized in that the transmitter
Including transmitter rear panel, transmitter rear panel is equipped with LC optical fiber interfaces and RJ45 mouthfuls.
6. a kind of hot standby transmission device of HD video dual link according to claim 5, which is characterized in that the receiver
Including receiver front panel, receiver front panel is equipped with LC optical fiber interfaces, RJ45 mouthfuls, DVI output interfaces and RS-232 interface.
7. a kind of hot standby transmission device of HD video dual link according to claim 6, which is characterized in that the receiver
Including receiver rear panel, receiver rear panel is equipped with AC power input interface and power switch.
8. a kind of hot standby transmission device of HD video dual link stated according to claim 7, which is characterized in that the receiver and
Transmitter is connected by single mode optical fiber.
9. a kind of hot standby transmission device of HD video dual link stated according to claim 7, which is characterized in that the receiver and
Transmitter passes through twisted pair line connection.
10. a kind of hot standby transmission device of HD video dual link stated according to claim 7, which is characterized in that the receiver
It is connected by matrix with transmitter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810122232.2A CN108471512B (en) | 2018-02-07 | 2018-02-07 | High-definition video dual-link hot standby transmission equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810122232.2A CN108471512B (en) | 2018-02-07 | 2018-02-07 | High-definition video dual-link hot standby transmission equipment |
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| CN108471512A true CN108471512A (en) | 2018-08-31 |
| CN108471512B CN108471512B (en) | 2020-04-17 |
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| CN201810122232.2A Active CN108471512B (en) | 2018-02-07 | 2018-02-07 | High-definition video dual-link hot standby transmission equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110958405A (en) * | 2019-11-22 | 2020-04-03 | 中船重工（武汉）凌久电子有限责任公司 | Ultra-high-definition display control system and method based on optical fiber encoding and decoding 4Kx2K |
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| CN108471512B (en) | 2020-04-17 |
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