CN206149419U - Utilize twisted -pair transmission super large resolution ratio and superelevation frame per second video signal's receiving arrangement - Google Patents
Utilize twisted -pair transmission super large resolution ratio and superelevation frame per second video signal's receiving arrangement Download PDFInfo
- Publication number
- CN206149419U CN206149419U CN201621092823.2U CN201621092823U CN206149419U CN 206149419 U CN206149419 U CN 206149419U CN 201621092823 U CN201621092823 U CN 201621092823U CN 206149419 U CN206149419 U CN 206149419U
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- unit
- video
- video signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 36
- 238000013519 translation Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000004148 unit process Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000000452 restraining effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000003709 image segmentation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 101000860173 Myxococcus xanthus C-factor Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Color Television Systems (AREA)
Abstract
Utilize twisted -pair transmission super large resolution ratio and superelevation frame per second video signal's receiving arrangement, its characterized in that: including connecting gradually AD translation unit, parallel decoding units, image assembled element, gain control unit and colourity space translation unit, the analog signal of transmission on the paired line gets into parallel decoding units after AD translation unit forms data signal, resume become the video signal of YUV form all the way with brightness signal Y among the data signal and chrominance signal C, a plurality of video signal that image assembled element will walk abreast the decoding units processing make up into the image that a frame is complete, the gain control unit is handled image later to image assembled element and is carried out luminance component Y and chrominance components UV gain adjustment formation YUV video data, YUV video data converts the RGB video data who accords with VGA and show to through colourity space translation unit. The utility model has the advantages of configure with low costs, the framework mode is simple to be favorable to restraining common mode interference, reduce the decay.
Description
Technical field
The reception device of video signal involved by this utility model, and in particular to using Double-strand transmission super large resolution and
The reception device of superelevation frame per second video signal.
Background technology
Transmission of video, particularly suffers from weight to the transmission of video of two field picture in people's daily life and production industrial circle
The application wanted.By the way of coaxial cable linear transmission, its transmission system belongs to single line transmission to traditional field transmission of video, passes
Defeated limited bandwidth, while single coaxial line is when multi-signal is transmitted, inter-signal interference is big, transmits the limited resolution of video,
And easily produce common mode disturbances and increase color because of external electromagnetic wave interference and decline；Furthermore, single coaxial line transmission bandwidth is limited,
For being directed to the high frequency video signal of similar super large resolution and superelevation frame per second, coaxial line unicast communication bandwidth is difficult to meet
Require, and it is higher to be transmitted signal frequency, and coaxial transmission decay is bigger, and transmission range is shorter；It is direct that coaxial line carries out video
During transmission, image surrounding bright color crosstalk is big；Coaxial line architecture is relatively costly.Meanwhile, traditional video signal transmission is not to regarding
Frequency signal carries out early stage and processes and follow single line brightness and colourity is encoded together, easily produces light tone interference.
Utility model content
This utility model has problems and not enough to solve prior art, there is provided using Double-strand transmission super large resolution
With the transfer device of superelevation frame per second video signal, the device carries out A/D conversion process to the analogue signal of Double-strand transmission, then
Parallel decoding, image combination, gain control, color space convert are carried out, final output is adapted to display screen and shows rgb signal.
For achieving the above object, this utility model provides following technical scheme：
Using Double-strand transmission super large resolution and the reception device of superelevation frame per second video signal, it is characterised in that：Including
A/D converting units, parallel decoding unit, image combining unit, gain control unit and color space convert unit are sequentially connected,
The analogue signal transmitted on twisted-pair feeder enters parallel decoding unit Jing after A/D converting units form digital signal, by digital signal
In luminance signal Y and carrier chrominance signal C revert to the video signal of yuv format all the way, image combining unit is by parallel decoding list
Multiple video signals that unit is processed are combined into the complete image of a frame, after gain control unit is to image combining unit process
Image carries out luminance component Y and chromatic component UV Gain tunings form yuv video data, and yuv video data Jing chrominance space turns
Cell translation is changed into meeting the rgb video data that VGA shows.
Used as a kind of improvement, parallel decoding unit includes four decoders, the brightness of four decoders to Double-strand transmission
Signal Y and carrier chrominance signal C are decoded two-by-two, and each decoder reverts to separate luminance signal Y and carrier chrominance signal C all the way
Video signal, ultimately forms 4 road video signals.
Used as a kind of improvement, the decoder of parallel decoding unit includes clamper, automatic gain control unit, genlock list
The DC that unit and chrominance demodulation unit, the clamper and automatic gain control unit are removed in video signal is offset so that video signal
Amplitude return within normal range, genlock unit recover sampling clock from luminance signal Y and feed back to A/D conversion
Unit so as to which sample clock frequency is synchronous with the holding of the code clock frequency of dispensing device, realizes video line field timing recovery；Color
The sinusoidal carrier signal phase of the fixed frequency that degree demodulating unit produces carrier chrominance signal C with direct digital frequency synthesizer DDS
Take advantage of, then by low pass filter LPF, demodulate corresponding U components, by carrier chrominance signal C and direct digital frequency synthesizer DDS
The cosine wave carrier signal of the fixed frequency of generation is multiplied, then by low pass filter LPF, demodulates corresponding V component.
Used as a kind of improvement, genlock unit includes phase discriminator, loop filter, voltage controlled oscillator and frequency divider；Institute
State phase discriminator to compare voltage controlled oscillator output frequency with incoming frequency and produce an error voltage corresponding with phase contrast, it is defeated
Go out the error voltage to filter to loop filter, it is filtered after be input to voltage controlled oscillator, modulation voltage controlled oscillator output frequency
A rate part feeds back to phase discriminator input through frequency divider, it is final cause output frequency divided by the frequency values after frequency dividing multiple with
Incoming frequency is identical.
The beneficial effects of the utility model are：Double-strand transmission has framework low cost, framework compared with the transmission of coaxial cable
Mode is simple to obtain advantage, and is conducive to suppression common mode to disturb, and reduces decay.Meanwhile, this utility model Double-strand transmission is realized
The purpose of multipath signal propagation, realizes multichannel down conversion process and reduces the bandwidth requirement of every signal transmission, further,
The YC separation transmission means of video signal of this utility model to transmitting, unified light tone decoding process simultaneously effectively prevent because bright
Degree colourity interferes the transmission problem of generation.
Description of the drawings
Fig. 1 is system structure diagram of the present utility model.
Fig. 2 is the structural representation of this utility model parallel decoding unit.
Fig. 3 is the decoding process schematic diagram of this utility model parallel decoding unit decoder.
Fig. 4 is the structural representation of this utility model genlock unit.
Fig. 5 is the schematic flow sheet of this utility model chrominance demodulation unit.
Specific embodiment
Embodiment of the present utility model is further described below.Following examples are only carried out further to the application
Illustrate, should not be construed as the restriction to the application.
As shown in Figure 1 using Double-strand transmission super large resolution and the reception device of superelevation frame per second video signal, including according to
Secondary connection A/D converting units, parallel decoding unit, image combining unit, gain control unit and color space convert unit, it is double
The analogue signal transmitted on twisted wire enters parallel decoding unit Jing after A/D converting units form digital signal, by digital signal
Luminance signal Y and carrier chrominance signal C revert to the video signal of yuv format all the way, image combining unit is by parallel decoding unit
The multiple video signals for processing are combined into the complete image of a frame, and gain control unit is to the figure after image combining unit process
Yuv video data, yuv video data Jing color space convert are formed as carrying out luminance component Y and chromatic component UV Gain tunings
Cell translation is into meeting the rgb video data that VGA shows.Traditional cable transmission is changed and passed with twisted-pair feeder by this utility model
It is defeated, Double-strand transmission than the transmission of coaxial cable have framework low cost, framework mode it is simple advantage, and be conducive to suppress
Common mode disturbances, reduce decay.
Further, this utility model creatively introduces A/D converting units, 8 tunnels of the A/D converting units to Double-strand transmission
Parallel analog video signal changes into digital signal and exports to parallel decoding unit, image combining unit, gain control unit
Processed successively with color space convert unit.
This utility model creatively introduces parallel decoding unit, as shown in Fig. 2 parallel decoding unit includes 4 solutions
Code device, 4 decoders are decoded two-by-two respectively to luminance signal Y and carrier chrominance signal C of Double-strand transmission, and each decoder will
Separate luminance signal Y and carrier chrominance signal C reverts to video signal all the way, ultimately forms 4 road video signals.
As a kind of improved specific embodiment, as shown in figure 3, the decoder of parallel decoding unit is including clamper and certainly
Dynamic gain control unit, genlock and video line field timing unit and chrominance demodulation unit, wherein clamper and automatic gain control
The DC that unit processed is removed in video signal is offset so that the amplitude of video signal was returned within normal range；For luminance signal
Y, the reference voltage of the ADC being clamped to during each row synchronization, i.e. ADC generates a code 0 during sync level, while
Difference with blanking level and sync level is with reference to adjustment AGC gain；For carrier chrominance signal C, row synchronization period is clamped to
ADC intermediate points so that ADC generates a code 512 during blanking level, at the same with follow-up chroma decoding unit feed back
Burst level is that datum adjusts AGC gain；Y and C signal after above-mentioned steps enters genlock unit, from bright
Recover sampling clock in degree signal Y and feed back to A/D converting units so as to the encoded clock of sample clock frequency and dispensing device
Frequency keeps synchronous, while according to line synchronising signal and frame synchronizing signal, determining the row field sequential of input signal, there is provided to brightness
Signal Y and carrier chrominance signal C.
Dispensing device above, including the color space convert unit, YUV gain control units, the image that are sequentially connected
Cutting unit, parallel encoding unit, D/A converting units；Video signal Jing color space convert units are converted into rgb format
Yuv format simultaneously carries out the adjustment of YC by YUV gain control units；Image segmentation unit is to the video signal after adjustment
It is divided into some subimages；Parallel encoding unit carries out brightness Y, colourity UV to subimage and is encoded separately and single by D/A conversions
Unit is converted into analogue signal to be transmitted on twisted pair transmission line；Image segmentation unit includes a scanning element, should
Scanning element includes three scanning devices, and the scanning device carries out three interlacing scans to video signal, final to obtain four width subgraphs
Picture；Dispensing device also includes concurrency control unit, and the concurrency control unit passes through on-off control Jing image segmentation units institute shape
Into subimage simultaneously and be advanced into parallel encoding unit；Parallel encoding unit includes four encoders, encoder and subimage
Number correspond.Encoder includes discrete luminance coding module and chroma coder module, and the subimage Jing is bright
Luminance signal Y is formed after degree coding module, carrier chrominance signal C is formed Jing after chroma coder module；When luminance coding module is included
Sequence lock unit, the timing synchronization unit generates clock signal and is attached in luminance signal Y.Chroma coder module is by direct
The sinusoidal signal of the fixed frequency that formula digital frequency synthesizer DDS is produced is same with chromatic component U and V and color as chrominance carrier
Step signal carries out quadrature amplitude modulation synthesis carrier chrominance signal C；Color space convert unit supports NTSC standard and PAL standards
Rgb format video data is converted into the video data of yuv format.
This utility model genlock unit major function is the Phase synchronization for making output clock and input clock, concrete logical
Output signal frequency is crossed from motion tracking frequency input signal, when both frequencies are equal, output frequency keeps solid with incoming frequency
Phase bit is poor, realizes the phase-locked function, as shown in figure 4, genlock unit includes phase discriminator, loop filter, voltage controlled oscillator
And frequency divider；The phase discriminator compare voltage controlled oscillator output frequency with incoming frequency and produce one it is corresponding with phase contrast
Error voltage, exports the error voltage and filters to loop filter, it is filtered after be input to voltage controlled oscillator, modulate voltage-controlled shaking
Swing a device output frequency part and feed back to phase discriminator input through frequency divider, after finally causing output frequency divided by frequency dividing multiple
Frequency values it is identical with incoming frequency till, wherein frequency divider frequency dividing multiple can determine as desired, such as 10 frequency dividing.
As a kind of improved specific embodiment, as shown in figure 5, chrominance demodulation unit is by carrier chrominance signal C and direct-type
The sinusoidal carrier signal of the fixed frequency that digital frequency synthesizer DDS is produced is multiplied, then by low pass filter LPF, demodulates
Corresponding U components, the cosine wave carrier signal letter of the fixed frequency that carrier chrominance signal C and direct digital frequency synthesizer DDS are produced
Number it is multiplied, then by low pass filter LPF, demodulates corresponding V component.In demodulating process, need to be by detection colour synchronisation letter
Number level value, determines the phase contrast of local carrier signal and carrier signal in colourity, and in this, as reference, constantly adjustment is local
Carrier signal phase, make phase contrast reach minimum, it is ensured that carrier chrominance signal is correctly decoded.
Further, sinusoidal or cosine carrier signal is produced by direct digital frequency synthesizer DDS, and detailed process is such as
Under：It is assumed that original clock frequency is Q, the frequency for producing is needed to be P, according to Nyquist law, P is less than or equal to Q/2.Using 32
The accumulator of position, in each clock time step-length P*2 of 32 is added32/ Q, the accumulated value at each moment of accumulator is defeated
Go out, and to it with 232Delivery is re-fed into accumulator, and the value after delivery is the phase place of required frequency.Using phase place as index,
Inquiry certain table, you can the sinusoidal or cosine wave signal of frequency needed for producing.
Finally, this utility model creatively introduces image combining unit by the 4 of 4 decoder output of parallel decoding unit
Group yuv data the complete image of one frame is reassembled into behavior unit, by gain control unit to image combining unit at
Y, U after reason, the corresponding increment of V component are multiplied into line brightness/chrominance control, improve video ornamental；After Gain tuning
Yuv video data Jing color space convert cell translation is into meeting the rgb video data that VGA shows.
The above is only preferred implementation of the present utility model, protection domain of the present utility model is not limited merely to above-mentioned
Embodiment, all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.It should be pointed out that right
For those skilled in the art, some improvements and modifications under the premise of without departing from this utility model principle,
These improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (4)
1. using Double-strand transmission super large resolution and the reception device of superelevation frame per second video signal, it is characterised in that：Including according to
Secondary connection A/D converting units, parallel decoding unit, image combining unit, gain control unit and color space convert unit, it is double
The analogue signal transmitted on twisted wire enters parallel decoding unit Jing after A/D converting units form digital signal, by digital signal
Luminance signal Y and carrier chrominance signal C revert to the video signal of yuv format all the way, image combining unit is by parallel decoding unit
The multiple video signals for processing are combined into the complete image of a frame, and gain control unit is to the figure after image combining unit process
Yuv video data, yuv video data Jing color space convert are formed as carrying out luminance component Y and chromatic component UV Gain tunings
Cell translation is into meeting the rgb video data that VGA shows.
2. the reception of utilization Double-strand transmission super large resolution according to claim 1 and superelevation frame per second video signal is filled
Put, it is characterised in that：The parallel decoding unit includes four decoders, the luminance signal of four decoders to Double-strand transmission
Y and carrier chrominance signal C are decoded two-by-two, and each decoder reverts to separate luminance signal Y of each image and carrier chrominance signal C
All the way video signal, ultimately forms 4 road video signals.
3. the reception of utilization Double-strand transmission super large resolution according to claim 2 and superelevation frame per second video signal is filled
Put, it is characterised in that：The decoder of the parallel decoding unit includes clamper and automatic gain control unit, genlock and regards
Frequency row field timing unit and chrominance demodulation unit, the clamper and automatic gain control unit remove the DC skews in video signal
So that the amplitude of video signal was returned within normal range, genlock and video line field timing unit are from luminance signal Y
Recover sampling clock and feed back to A/D converting units so as to which sample clock frequency keeps with the code clock frequency of dispensing device
It is synchronous, realize video line field timing recovery；Chrominance demodulation unit produces carrier chrominance signal C and direct digital frequency synthesizer DDS
The sinusoidal carrier signal of raw fixed frequency is multiplied, then by low pass filter LPF, demodulates corresponding U components, and colourity is believed
The cosine wave carrier signal of the fixed frequency that number C is produced with direct digital frequency synthesizer DDS is multiplied, then by low-pass filtering
Device LPF, demodulates corresponding V component.
4. the reception of utilization Double-strand transmission super large resolution according to claim 3 and superelevation frame per second video signal is filled
Put, it is characterised in that：The genlock unit includes phase discriminator, loop filter, voltage controlled oscillator and frequency divider；The mirror
Phase device compares voltage controlled oscillator output frequency with incoming frequency and produces an error voltage corresponding with phase contrast, exports institute
State error voltage to filter to loop filter, it is filtered after be input to voltage controlled oscillator, modulation voltage controlled oscillator output frequency one
Part feeds back to phase discriminator input through frequency divider, final to cause output frequency divided by the frequency values after frequency dividing multiple and input
Frequency is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621092823.2U CN206149419U (en) | 2016-09-29 | 2016-09-29 | Utilize twisted -pair transmission super large resolution ratio and superelevation frame per second video signal's receiving arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621092823.2U CN206149419U (en) | 2016-09-29 | 2016-09-29 | Utilize twisted -pair transmission super large resolution ratio and superelevation frame per second video signal's receiving arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206149419U true CN206149419U (en) | 2017-05-03 |
Family
ID=58620232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621092823.2U Active CN206149419U (en) | 2016-09-29 | 2016-09-29 | Utilize twisted -pair transmission super large resolution ratio and superelevation frame per second video signal's receiving arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206149419U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106303486A (en) * | 2016-09-29 | 2017-01-04 | 杭州雄迈集成电路技术有限公司 | A kind of reception device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal |
| CN117560460A (en) * | 2024-01-12 | 2024-02-13 | 杭州海康威视数字技术股份有限公司 | Conversion circuit for video analog signal transmission |
-
2016
- 2016-09-29 CN CN201621092823.2U patent/CN206149419U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106303486A (en) * | 2016-09-29 | 2017-01-04 | 杭州雄迈集成电路技术有限公司 | A kind of reception device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal |
| CN117560460A (en) * | 2024-01-12 | 2024-02-13 | 杭州海康威视数字技术股份有限公司 | Conversion circuit for video analog signal transmission |
| CN117560460B (en) * | 2024-01-12 | 2024-04-09 | 杭州海康威视数字技术股份有限公司 | Conversion circuit for video analog signal transmission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1065703C (en) | HDTV signal receiver withimaginary-sample-presencedetector for QAM/VSB mode selection on | |
| US5621478A (en) | Multistandard decoder for video signals and video signal decoding method | |
| CN1174610C (en) | Video signal processing apparatus | |
| CN100536577C (en) | ADC system, video decoder and related method for decoding composite video | |
| CN106303486A (en) | A kind of reception device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal | |
| MY114086A (en) | Carrier recovery system for a vestigial sideband signal | |
| CN102238384A (en) | Multi-channel video decoder | |
| EP2117224A2 (en) | Digitized analog TV signal processing system | |
| CN206433068U (en) | Utilize the dispensing device of Double-strand transmission super large resolution ratio and superelevation frame per second vision signal | |
| CN1066889C (en) | Digital VSB detector with bandpass phase tracker using rader filters, as for use in an HDTV receiver | |
| CN206149419U (en) | Utilize twisted -pair transmission super large resolution ratio and superelevation frame per second video signal's receiving arrangement | |
| CN106303345A (en) | A kind of dispensing device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal | |
| CN201774613U (en) | RGB analog video signal acquisition system | |
| CN101146232B (en) | Methods and devices to use two different clocks in a television digital encoder | |
| CN1041782C (en) | Clock signal generator for digital television reveiver | |
| CN205283706U (en) | High definition simulation composite video signal transmission system | |
| CN103067697A (en) | Method removing video graphics array (VGA) signal vibration based on optical fiber transmission | |
| CN1953518A (en) | PC-based TV receiving method and installation, video demodulator and decoding method | |
| CN1030746C (en) | Methods and systems for transmitting and receiving high definition television signals | |
| CN105306938B (en) | A kind of digital video code and digital video frequency encoding method | |
| CN103152543A (en) | Transmission method and device of audio/video signals of composite video | |
| WO1990004904A1 (en) | Television receiver | |
| KR100212384B1 (en) | Video signal transmission method | |
| CN203984594U (en) | A kind of digital video code | |
| CN1045674A (en) | High definition b-mac television signal transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 311400 4th floor, building 9, Yinhu innovation center, No. 9, Fuxian Road, Yinhu street, Fuyang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou xiongmai integrated circuit technology Co.,Ltd. Address before: Hangzhou City, Zhejiang Province, 311422 Silver Lake Street Fu Road No. 9 silver lake leisure Innovation Center 9 building 12 room 1210 Patentee before: HANGZHOU XIONGMAI INTEGRATED CIRCUIT TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311400 4th floor, building 9, Yinhu innovation center, No.9 Fuxian Road, Yinhu street, Fuyang District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Xinmai Microelectronics Co.,Ltd. Address before: 311400 4th floor, building 9, Yinhu innovation center, No.9 Fuxian Road, Yinhu street, Fuyang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou xiongmai integrated circuit technology Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |