CN109104548A - A kind of video transfer signal self-checking device - Google Patents
A kind of video transfer signal self-checking device Download PDFInfo
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- CN109104548A CN109104548A CN201711317801.0A CN201711317801A CN109104548A CN 109104548 A CN109104548 A CN 109104548A CN 201711317801 A CN201711317801 A CN 201711317801A CN 109104548 A CN109104548 A CN 109104548A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/08—Separation of synchronising signals from picture signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
Abstract
The invention discloses a kind of video transfer signal self-checking devices, wherein, including video signal collection unit and video signal processing unit, it is connected between video signal collection unit and video signal processing unit by coaxial line, first vision signal of the video signal processing unit point for acquiring video signal collection unit is handled and exported；Video signal collection unit includes video signal input module, vision signal separation module, inserts code circuit module, vision signal mixing module, signal generator；Video signal processing unit includes composite signal separation module, to code circuit module, amplifier module, composite video signal output module, it is connected between composite signal separation module and signal mixing module by coaxial line, the vision signal that the amplification that can carry out gain coefficient to the vision signal after decaying in transmission process is near the mark guarantees that the video of composite video signal output module output is more clear.
Description
Technical field
The present invention relates to video frequency transmitter technical fields, and in particular to a kind of video transfer signal self-checking device.
Background technique
For existing CCTV system in engineering placement-and-routing, coaxial line occupies suitable certain proportion, its city at us
And plant area monitoring in it is very common, still, due to during video model spectrum signature and electric signal transmission it is distinctive become skin effect
It answers, under different transmission bad borders, vision signal can all have decaying in various degree and be interfered in various degree.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of video transfer signal self-checking devices, can be transmitted across
The vision signal that the amplification for carrying out gain coefficient to the vision signal after decaying in journey is near the mark guarantees composite video letter
The video of number output module output is more clear, to solve defect caused by the prior art.
The present invention provides technical solution below to solve above-mentioned technical problem: a kind of video transfer signal automatic adjustment dress
It sets, wherein including video signal collection unit and video signal processing unit, the video signal collection unit and the video
It is connected between signal processing unit by coaxial line, the video signal processing unit point is for by the video signal collection list
First vision signal of member acquisition is handled and is exported；
The video signal collection unit includes video signal input module, vision signal separation module, inserts code circuit module, view
Frequency signal mixing module, signal generator；
The video signal input module is for receiving first vision signal and by first video signal transmission to institute
State vision signal separation module；
The vision signal separation module extracts the same of first video signal recording for receiving first vision signal
Walk signal and by the synchronous transmission of signal to the slotting code circuit module, by first video signal transmission to the signal
Mixing module；
The signal generator is used to generate the passband signal of standard, and the passband signal is transmitted to the slotting code circuit mould
Block；
The slotting code circuit module is for receiving the synchronization signal and the passband signal, and generation is transmitted to the signal and mixes
Mold the standard output passband signal of block；
The signal mixing module is for receiving first vision signal and the standard output passband signal, and by the mark
Quasi- output passband signal, which is inserted into first vision signal, generates the first composite video signal, is also used to compound by described first
Video signal transmission is to the video signal processing unit；
The video signal processing unit includes composite signal separation module, to code circuit module, amplifier module, composite video
Signal output module is connected between the composite signal separation module and the signal mixing module by the coaxial line；
The composite signal separation module declines after the coaxial line transmission process for receiving first composite video signal
The second composite video signal subtracted, while second composite video signal is transmitted to the amplifier module described in extraction
The standard output passband signal of second composite video signal record simultaneously forms band logical test signal, is also used to the band logical
Test signal is transmitted to described to code circuit module；
It is described that signal is tested for receiving the band logical to code circuit module, and band logical test signal and the passband are believed
It number is compared and matrixing generates band gain matrix, be also used to the band gain Transfer-matrix to the amplifier
Module；
The amplifier module is also used to pass through institute for receiving second composite video signal and the band gain matrix
It states the gain adjustment that band gain matrix carries out different frequent points to second composite video signal and generates third composite video letter
Number, and the third composite video signal is transmitted to the composite video signal output module；
The composite video signal output module is for receiving the composite video signal output module and exporting the compound view
Frequency signal output module.
Above-mentioned a kind of video transfer signal self-checking device, wherein second composite video signal is described in warp
First composite video signal to decay in coaxial line transmission process；
The band logical test signal is the standard output passband signal through decaying in the coaxial line transmission process.
Above-mentioned a kind of video transfer signal self-checking device, wherein the standard output passband signal is inserted into institute
It states in the field blanking area of the first vision signal and generates the first composite video signal.
The technical solution effect provided according to a kind of video transfer signal self-checking device of aforementioned present invention is: Neng Gou
The vision signal that the amplification for carrying out gain coefficient to the vision signal after decaying in transmission process is near the mark guarantees compound
The video of vision signal output module output is more clear.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of video transfer signal self-checking device of the present invention.
Wherein, appended drawing reference is as follows: video signal input module 101, inserts code circuit mould at vision signal separation module 102
Block 103, vision signal mixing module 104, signal generator 105, composite signal separation module 106, to code circuit module 107,
Amplifier module 108, composite video signal output module 109, video signal collection unit 110, video signal processing unit
111。
Specific embodiment
In order to realize invention technological means, create feature, reach purpose and effect is easy to understand, lower combination tool
Body diagram, the present invention is further explained.
The first embodiment of the present invention is to provide a kind of video transfer signal self-checking device, it is therefore an objective to can transmit
The vision signal that the amplification for carrying out gain coefficient to the vision signal after decaying in the process is near the mark guarantees composite video
The video of signal output module output is more clear.
As shown in Figure 1, a kind of video transfer signal self-checking device, wherein including video signal collection unit 110 with
Video signal processing unit 111 is connected between video signal collection unit 110 and video signal processing unit 111 by coaxial line
Connect, video signal processing unit 111 divide the first vision signal for acquiring video signal collection unit 110 carry out processing with
Output；
Video signal collection unit 110 includes video signal input module 101, vision signal separation module 102, inserts code circuit mould
Block 103, vision signal mixing module 104, signal generator 105；
Video signal input module 101 is for receiving the first vision signal and separating the first video signal transmission to vision signal
Module 102；
Vision signal separation module 102 extracts the synchronization signal of the first video signal recording simultaneously for receiving the first vision signal
By synchronous transmission of signal to slotting code circuit module 103, by the first video signal transmission to signal mixing module；
Signal generator 105 is used to generate the passband signal of standard, and passband signal is transmitted to slotting code circuit module 103；
Code circuit module 103 is inserted for receiving synchronization signal and passband signal, and generates the standard for being transmitted to signal mixing module
Export passband signal；
Signal mixing module inserts standard output passband signal for receiving the first vision signal and standard output passband signal
Enter and generate the first composite video signal in the first vision signal, is also used to for the first composite video signal being transmitted at vision signal
Manage unit 111；
Video signal processing unit 111 include composite signal separation module 106, to code circuit module 107, amplifier module 108,
Composite video signal output module 109 is connected between composite signal separation module 106 and signal mixing module by coaxial line；
It is multiple that composite signal separation module 106 is used to receive the first composite video signal decays after coaxial line transmission process second
Vision signal is closed, the second composite video signal note is extracted while the second composite video signal is transmitted to amplifier module 108
The standard output passband signal of record simultaneously forms band logical test signal, is also used to for band logical test signal being transmitted to code circuit module
107；
To code circuit module 107 for receive band logical test signal, and by band logical test signal be compared with passband signal and
Matrixing generates band gain matrix, is also used to band gain Transfer-matrix to amplifier module 108；
Amplifier module 108 is also used to for receiving the second composite video signal and band gain matrix through band gain square
The gain adjustment that battle array carries out different frequent points to the second composite video signal generates third composite video signal, and by the compound view of third
Frequency signal is transmitted to composite video signal output module 109；
Composite video signal output module 109 is for receiving composite video signal output module 109 and output composite video signal
Output module 109.
A kind of video transfer signal self-checking device provided in this embodiment, the second composite video signal used is warp
The first composite video signal to decay in coaxial line transmission process；
It is the standard output passband signal through decaying in coaxial line transmission process that band logical, which tests signal,.
A kind of video transfer signal self-checking device provided in this embodiment, accepted standard export passband signal insertion
The first composite video signal is generated into the field blanking area of the first vision signal.
A kind of video transfer signal self-checking device provided in this embodiment is by the field blanking area of vision signal
Middle insertion standard output passband signal, and decaying of the establishing criteria output passband signal in transmission process passes through to code circuit mould
Block 107 calculates band gain matrix, carries out according to band gain matrix to the second composite video signal finally by amplifier
The amplification of gain coefficient generates and the consistent vision signal of the first video signal intensity, specific operating procedure is as follows:
Step 1: being generated the passband signal of a standard by signal generator 105, this passband signal includes the bandwidth of video signal
The various spectrum signals of class, and the passband signal is transmitted to slotting code circuit module 103；
Vision signal separation module 102 believes received the first video transmitted from video signal input module 101 simultaneously
The synchronization signal recorded in number extracts and is transmitted to slotting code circuit module 103, while the first video signal transmission extremely being believed
Number mixing module；
Step 2: it inserts code circuit module 103 and the passband signal received and synchronization signal is handled and generate standard output
Passband signal, and the standard output passband signal of generation is transmitted to signal mixing module；
Step 3: the standard output passband signal received is inserted into the first vision signal received by signal mixing module
The first composite video signal is generated, and the first composite video signal is transmitted to composite signal separation module 106 by coaxial line；
Step 4: composite signal separation module 106 receive be after the first composite video signal decays in transmission process
Two composite video signals, the band logical test signal carried in the second composite video signal is standard output passband signal by coaxial
It is generated after line transmission attenuation, composite signal separation module 106 extracts band logical test signal from the second composite video signal
It out and is transmitted to code circuit module 107, while the second composite video signal is transmitted to amplifier module 108；
Step 5: will receive band logical test signal to code circuit module 107 and passband signal carries out signal frequency point matrixing,
Generate band gain matrix:
Wherein B is passband signal, and A is band logical test signal；
Then by band gain Transfer-matrix to amplifier module 108；
Step 6: amplifier module 108 declines received second composite video signal according to received band gain matrix
Subtract route amendment and gain adjustment generates third composite video signal, and is transmitted to compound view for third composite video signal is generated
The output of the progress video of frequency signal output module 109.
To sum up, a kind of video transfer signal self-checking device of the invention, can in transmission process to decaying after
Vision signal carries out the vision signal that the amplification of gain coefficient is near the mark, and guarantees the output of composite video signal output module
Video be more clear.
The specific embodiment of invention is described above.It is to be appreciated that invention be not limited to it is above-mentioned specific
Embodiment, devices and structures not described in detail herein should be understood as is practiced with the common mode in this field；
Those skilled in the art can make within the scope of the claims various deformations or amendments make it is several it is simple deduce, deformation or
Replacement, this has no effect on the substantive content of invention.
Claims (3)
1. a kind of video transfer signal self-checking device, which is characterized in that including video signal collection unit and vision signal
Processing unit is connected between the video signal collection unit and the video signal processing unit by coaxial line, the view
First vision signal of the audio signalprocessing unit point for acquiring the video signal collection unit is handled and is exported；
The video signal collection unit includes video signal input module, vision signal separation module, inserts code circuit module, view
Frequency signal mixing module, signal generator；
The video signal input module is for receiving first vision signal and by first video signal transmission to institute
State vision signal separation module；
The vision signal separation module extracts the same of first video signal recording for receiving first vision signal
Walk signal and by the synchronous transmission of signal to the slotting code circuit module, by first video signal transmission to the signal
Mixing module；
The signal generator is used to generate the passband signal of standard, and the passband signal is transmitted to the slotting code circuit mould
Block；
The slotting code circuit module is for receiving the synchronization signal and the passband signal, and generation is transmitted to the signal and mixes
Mold the standard output passband signal of block；
The signal mixing module is for receiving first vision signal and the standard output passband signal, and by the mark
Quasi- output passband signal, which is inserted into first vision signal, generates the first composite video signal, is also used to compound by described first
Video signal transmission is to the video signal processing unit；
The video signal processing unit includes composite signal separation module, to code circuit module, amplifier module, composite video
Signal output module is connected between the composite signal separation module and the signal mixing module by the coaxial line；
The composite signal separation module declines after the coaxial line transmission process for receiving first composite video signal
The second composite video signal subtracted, while second composite video signal is transmitted to the amplifier module described in extraction
The standard output passband signal of second composite video signal record simultaneously forms band logical test signal, is also used to the band logical
Test signal is transmitted to described to code circuit module；
It is described that signal is tested for receiving the band logical to code circuit module, and band logical test signal and the passband are believed
It number is compared and matrixing generates band gain matrix, be also used to the band gain Transfer-matrix to the amplifier
Module；
The amplifier module is also used to pass through institute for receiving second composite video signal and the band gain matrix
It states the gain adjustment that band gain matrix carries out different frequent points to second composite video signal and generates third composite video letter
Number, and the third composite video signal is transmitted to the composite video signal output module；
The composite video signal output module is for receiving the composite video signal output module and exporting the compound view
Frequency signal output module.
2. a kind of video transfer signal self-checking device as described in claim 1, which is characterized in that the second compound view
Frequency signal is first composite video signal through decaying in the coaxial line transmission process；
The band logical test signal is the standard output passband signal through decaying in the coaxial line transmission process.
3. a kind of video transfer signal self-checking device as claimed in claim 2, which is characterized in that the standard output is logical
Band signal is inserted into the field blanking area of first vision signal and generates the first composite video signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711317801.0A CN109104548A (en) | 2017-12-12 | 2017-12-12 | A kind of video transfer signal self-checking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711317801.0A CN109104548A (en) | 2017-12-12 | 2017-12-12 | A kind of video transfer signal self-checking device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113836855A (en) * | 2021-08-30 | 2021-12-24 | 北京钛方科技有限责任公司 | Saturated signal characteristic correction method, saturated signal characteristic correction device, electronic equipment and storage medium |
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| CN106488082A (en) * | 2016-11-23 | 2017-03-08 | 浙江大华技术股份有限公司 | Determine compensating parameter, video signal is compensated with the method and device of process |
| CN106657858A (en) * | 2016-09-22 | 2017-05-10 | 国网江苏省电力公司泰州供电公司 | Control method and control device for signal transmission distance |
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Patent Citations (5)
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| CN101795385A (en) * | 2009-02-03 | 2010-08-04 | 厦门Abb振威电器设备有限公司 | Automatic preamplification and precompensation twisted-pair video transmission method and system |
| CN102118619A (en) * | 2009-12-31 | 2011-07-06 | 华为技术有限公司 | Video signal compensating method, device and system |
| CN105407253A (en) * | 2015-11-03 | 2016-03-16 | 浙江大华技术股份有限公司 | Method and device for determining video signal attenuation data |
| CN106657858A (en) * | 2016-09-22 | 2017-05-10 | 国网江苏省电力公司泰州供电公司 | Control method and control device for signal transmission distance |
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| CN113836855A (en) * | 2021-08-30 | 2021-12-24 | 北京钛方科技有限责任公司 | Saturated signal characteristic correction method, saturated signal characteristic correction device, electronic equipment and storage medium |
| CN113836855B (en) * | 2021-08-30 | 2023-08-25 | 北京钛方科技有限责任公司 | Saturated signal characteristic correction method, device, electronic equipment and storage medium |
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Application publication date: 20181228 |
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