CN106303345A - A kind of dispensing device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal - Google Patents
A kind of dispensing device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal Download PDFInfo
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- CN106303345A CN106303345A CN201610864288.6A CN201610864288A CN106303345A CN 106303345 A CN106303345 A CN 106303345A CN 201610864288 A CN201610864288 A CN 201610864288A CN 106303345 A CN106303345 A CN 106303345A
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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
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
Abstract
A kind of dispensing device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal, including the color space convert unit being sequentially connected with, YUV gain control unit, image segmentation unit, coding unit, D/A converting unit；Rgb format is converted into yuv format through color space convert unit and is carried out the adjustment of YC by YUV gain control unit by video signal；Image segmentation unit is divided into some subimages to the video signal after adjusting；Coding unit carries out brightness Y to subimage, colourity UV is encoded separately and is converted into analogue signal to be transmitted on twisted pair transmission line by D/A converting unit；The present invention has framework low cost, the simple advantage of mode, it is beneficial to suppress common mode disturbances, reduce decay, present invention achieves multichannel down conversion process and reduce the bandwidth requirement of every signal transmission and reduce the distortion factor of transmission frequency and effectively prevent because YC interferes the transmission problem of generation simultaneously.
Description
Technical field
The present invention relates to the dispensing device of video signal, be specifically related to one and utilize Double-strand transmission super large resolution and surpass
The dispensing device of high frame-rate video signal.
Background technology
Transmission of video, particularly suffers from weight to the transmission of video of two field picture at people's daily life and production industrial circle
The application wanted.Traditional field simulation HD video transmission uses the mode of coaxial cable linear transmission, belongs to single line transmission,
During transmission multi-signal, inter-signal interference is big, and the limited resolution of transmission video easily produces because of external electromagnetic wave interference altogether
Mould disturbs, and increases the weight of colourity decay；Furthermore, single coaxial line transmission bandwidth is limited, is directed to similar super large resolution and Hyperframe
For the high frequency video signal of rate, coaxial line unicast communication bandwidth is difficult to meet requirement, and it is the highest to be transmitted signal frequency,
Coaxial transmission decay is the biggest, and transmission range is the shortest；Coaxial line carries out video when directly transmitting, and image surrounding bright color crosstalk is big；With
Axis framework is relatively costly；Meanwhile, traditional video signal transmission is difficult to video signal be carried out early stage process and follows single line
Road brightness encodes together with colourity, easily produces bright color crosstalk.
Summary of the invention
The present invention is to solve prior art existing problems and deficiency, it is provided that transmission video signal is first adjusted by one
Process, then brightness, colourity are separately encoded, then by multi-line transmission means, utilize Double-strand transmission super large resolution
Dispensing device with superelevation frame per second video signal.
For achieving the above object, the technical scheme is that
A kind of dispensing device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal, including being sequentially connected with
Color space convert unit, YUV gain control unit, image segmentation unit, parallel encoding unit, D/A converting unit；
Rgb format is converted into yuv format and by YUV gain control unit through color space convert unit by video signal
Carry out the adjustment of YC；
Image segmentation unit is divided into some subimages to the video signal after adjusting；
Parallel encoding unit carries out brightness Y to subimage, colourity UV is encoded separately and is converted into mould by D/A converting unit
Intend signal to be transmitted on twisted pair transmission line.
Improving as one, image segmentation unit includes a scanning element, and this scanning element includes three scanning devices, institute
State scanning device and video signal is carried out three interlacing scans, final acquisition four width subimages.
Improve as one, also include that concurrency control unit, described concurrency control unit are divided through image by on-off control
Cut the subimage that unit formed and simultaneously and be advanced into parallel encoding unit.
Improving as one, parallel encoding unit includes the number one_to_one corresponding of four encoders, encoder and subimage.
Improving as one, encoder includes discrete luminance coding module and chroma coder module, described subgraph
As forming luminance signal Y after luminance coding module, after chroma coder module, form carrier chrominance signal C.
Improving as one, luminance coding module includes timing synchronization unit, and described timing synchronization unit generates sequential
Signal is also attached in luminance signal Y.
Improve as one, the fixed frequency that chroma coder module is produced by direct digital frequency synthesizer DDS
Sinusoidal signal carries out quadrature amplitude modulation synthesis carrier chrominance signal as chrominance carrier with chromatic component U and V and colour burst signal
C；Color space convert unit supports that the rgb format video data of NTSC standard and PAL standard is converted into the video counts of yuv format
According to.
The invention has the beneficial effects as follows: Double-strand transmission has framework low cost, framework mode compared with the transmission of coaxial cable
Simple advantage, and be conducive to suppressing common mode disturbances, reduce decay, meanwhile, Double-strand transmission of the present invention achieves multiple signals
The purpose of transmission, it is achieved that multichannel down conversion process also reduces the bandwidth requirement that every signal transmits, further, the present invention couple
The early stage of transmission signal adjusts and YC separation transmission means all effectively prevent the transmission problem produced because of bright color crosstalk.
Accompanying drawing explanation
Fig. 1 is the structural schematic block diagram of the present invention.
Fig. 2 is the image dividing processing flow chart of the present invention.
Fig. 3 is the coding flow chart of the present invention.
Fig. 4 is the internal structure schematic diagram of inventive encoder.
Fig. 5 is the luminance coding structure chart of the present invention.
Fig. 6 is the chroma coder flow chart of the present invention.
Fig. 7 is the twisted pair construction schematic diagram of the present invention.
Detailed description of the invention
Below embodiments of the invention are further described.The application is only carried out furtherly by following example
Bright, should not be construed as the restriction to the application.
One as shown in Figure 1, Figure 2, Figure 3, Figure 4 utilizes Double-strand transmission super large resolution and superelevation frame per second video signal
Dispensing device, including the color space convert unit 1 being sequentially connected with, YUV gain control unit 2, image segmentation unit 3 and
Row coding unit 4, D/A converting unit 5；Rgb format is converted into yuv format also through color space convert unit 1 by video signal
The adjustment of YC is carried out by YUV gain control unit 2；Video signal after adjusting is divided into by image segmentation unit 3
Some subimages；Parallel encoding unit 4 carries out brightness Y to subimage, colourity UV is encoded separately and passes through D/A converting unit 5 turns
Change analogue signal into be transmitted on twisted pair transmission line；Traditional cable transmission is changed with Double-strand transmission by the present invention
Circuit is transmitted, and owing to twisted-pair feeder is four groups of separate holding wires, often group circuit is for transmitting the bright of a secondary subimage
Carrier chrominance signal, therefore carry out bright, color after the video signal of super large resolution and superelevation frame per second can be carried out segmentation and be encoded separately passing
Defeated, it is achieved while frequency reducing, to avoid light tone to disturb, reduce single signal transmission bandwidth load renting twisted-pair feeder and requirement.
Further, the present invention additionally uses color space convert unit 1, video signal is entered by YUV gain control unit 2
Go pretreatment, according to NTSC or pal mode, RGB coded system video data has been converted into the regarding of YUV coded system of correspondence
Frequency evidence, carries out Gain tuning through YUV gain unit 2 to Y, U, V after being converted into yuv format, the video that present invention introduces
The mode that signal early stage processes, is converted to be more suitable for the yuv format of coding and transmission by video signal by rgb format and is easy to point
From bright chroma information, it is to avoid light tone is disturbed；And YUV gain control, it is that YUV three-component is controlled respectively, can reach preferably to regard
Feel effect, further, faint variate-value is adjusted by it, it is simple to subsequent transmission, in case small-signal decay causes
Subsequent acquisition and difficulty thereof；Further, yuv format video signal good for gain is creatively entered image segmentation by the present invention
Unit 3 carries out the image segmentation of various ways, and concrete mode system uses different scan mode, if interlacing scan etc. is to input
Video information is scanned so that till video signal meets the transmission requirement of twisted pair transmission line, image segmentation unit 3
Introducing make the video information of originally super large resolution and superelevation frame per second obtain segmentation repeatedly, and enter according to the result of segmentation
Row multi-line transmits, it is achieved that the purpose of frequency reducing, with being divided into its band to transmission cable of video information organizing subimage more
Wide requirement is the most correspondingly reduced, both served so that relatively independent between subimage video information, avoid the effect that interferes with each other,
Reduce again the bandwidth pressure of sin-gle twisted pair, it is to avoid high frequency video signal attenuation is big, transmit short problem.
Each subimage is directed respectively into each and compiles parallel by the subimage quantity after finally present invention employs according to segmentation
Code unit 4, parallel encoding unit 4 carries out the separation of colourity and brightness again to the most segmented good subimage, if i.e. originally
The subimage split is 4 width, and after the brightness of the most encoded unit 4 and chrominance separation, the another transmission signal formed is 8,
The respectively 4 each self-corresponding brightness Y of width subimage and the transmission signals of chrominance C after image segmentation unit 3 is split, totally 8,
The crosstalk of image surrounding light tone when avoiding transmission of video, it is ensured that final video transmission reduction degree, resolution, definition are all located
In higher standard, less there is distortion situation.
As the detailed description of the invention of a kind of improvement, as in figure 2 it is shown, image segmentation unit 3 includes a scanning element 31,
Scanning element 31 carries out three times and scans to obtain subimage video signal, and the present invention uses the mode of scanning to enter video signal
Row segmentation, is simply easily achieved, and because the number of times of the mode of each scanning element 31 scanning, scanning is different, can be according to son
The real needs of image number select the different scan modes corresponding to scanning element 31, specifically can use multiple segmentation side
Formula scans, e.g., interlacing, by column split etc., if demand is more, can be by identical or different to one or more
Scanning element 31 carry out multiple scanning or cross scan is achieved, and the image partitioning scheme of scanning is conducive to the most intactly
Retain all compositions of original image, it is only necessary to it is right the part of scanning segmentation can be completed according to the method split again of scanning
After the combination of subimage, i.e. scanning segmentation, the restructuring of subimage the most easily realizes and can mutually correlate, workable.
As the detailed description of the invention of a kind of improvement, as in figure 2 it is shown, described scanning element 31 includes three scanning devices 311,
It is interlacing scan 0, interlacing scan 1 and interlacing scan 2 respectively.Yuv data (4*M, 4*N) is sent into the interlacing of image segmentation unit
Scanning 0, by the single frames big image in different resolution interlacing scan of above-mentioned input, obtains odd-numbered line scanned picture (2*M, 4*N) and even number
Row scanned picture (2*M, 4*N)；Above-mentioned two width subimages are carried out interlacing scan the most respectively, obtains four width and finally split image
(M, 4*N).System of the present invention is transmitted for super large resolution and superelevation frame per second video signal, in order to meet frequency reducing, reduces each
Circuit undertakes signal bandwidth to reach the purpose of the bandwidth requirement of the present invention.
As the detailed description of the invention of a kind of improvement, as it is shown in figure 1, the present invention's utilizes Double-strand transmission super large resolution
With the dispensing device of superelevation frame per second video signal, also include concurrency control unit 6, concurrency control unit 6 to control through image and split
Subimage that unit 3 is formed simultaneously and is advanced into parallel encoding unit 4, and concurrency control unit 6 is so that all dividing through image
Cut subimage that unit 3 formed can simultaneously, parallel must enter parallel encoding unit 4, so that parallel encoding unit 4 energy
Processing subimage, coding unit 4 includes four encoders 41 simultaneously, concrete it may be that in each encoder 41 front end
Dispose a parallel control switch, ensure that signal simultaneously enters encoder 41, single encoder 41 can also be selected to turn on simultaneously,
I.e. carrying out one-channel signal transmission, independent control, in Fig. 4, concurrency control unit 6 controls 4 parallel control and switches on-off, from
And can be with optimized choice signal transfer mode, for forms such as low frequency signals, image segmentation can not be carried out, only open a volume
Code device 41 carries out light tone separately transmission, uses a pair circuit of twisted-pair feeder, i.e. present disclosure applies equally to traditional low-frequency signal
It is transmitted.
As the detailed description of the invention of a kind of improvement, as shown in Figure 4, coding unit 4 includes four encoders 41, described volume
Code device 41 and the number one_to_one corresponding of subimage；Encoder 41 can guarantee that all through image segmentation unit 3 points one to one
The subimage cutting formation can parallel, encode independently, it is to avoid coding pass is accelerated in interference each other simultaneously, carries
High efficiency, four encoders 41 the setting that can at utmost coordinate Double-strand transmission mode is set, the most efficiently.
As the detailed description of the invention of a kind of improvement, as shown in Figure 4, described encoder 41 includes that discrete brightness is compiled
Code module 42 and chroma coder module 43, subimage forms luminance signal Y after luminance coding module 42, through chroma coder module
Carrier chrominance signal C is formed after 43；Encoder 41 is divided into two coding modules by the present invention, is luminance coding module 42 and colourity respectively
Coding module 43, the subimage after luminance coding module 42 and chroma coder module 43 can form luminance signal Y and colourity
Signal C, due to yuv format itself, wherein Y is luminance component, and UV is chromatic component, therefore encoder 41 is actual logical
Cross luminance coding module 42 and chroma coder module 43 and yuv format has been carried out luminance coding and the colourity of UV component of Y-component
Coding, so that brightness and chrominance section in subimage are just distinguished when coding and are formed transmission signal respectively,
If the most correspondingly image is divided into 4 subimages, the most encoded device 41 to carry out dividing of YC by image segmentation unit 3
After beginning the compilation of code, i.e. forming 8 transmission signals, these 8 transmission signals are carrier chrominance signal C and the luminance signal of 4 subimages respectively
Y, thus afterwards line transmission time, luminance signal Y and carrier chrominance signal C also can respective individual transmission, i.e. avoid in transmitting procedure bright
The mutual crosstalk phenomenon of chrominance signal.
As the detailed description of the invention of a kind of improvement, as it is shown in figure 5, luminance coding module is by the luminance component of input picture
Forming plus timing synchronization cell encoding, each two field picture luminance coding can be divided into frame blanking interval and frame effective video is interval,
Wherein frame blanking interval includes equalizing signal row, frame synchronizing signal row and normal blank lines；And frame effective video interval row is main
For transmitting effective video luminance component.
Luminance coding module 42 of the present invention includes timing synchronization unit 421, and described timing synchronization unit 421 generates
Clock signal is also attached in luminance signal Y, owing to luminance coding module 42 and chroma coder module 43 need brightness and colourity
Carry out being separately encoded thus generate luminance signal Y and carrier chrominance signal C separately to transmit, in order to ensure same subgraph
Luminance signal Y of picture and carrier chrominance signal C can be easier to make for reconfiguring to regain one's integrity after being transmitted after coding completes
Ground subimage, all can have influence on luminance signal Y and carrier chrominance signal C due to the situation in transmission path, the speed of transmission, path etc.
Concordance, therefore by timing synchronization unit 421 synchronous sequence in luminance signal Y, concrete system is attached to the signal of luminance signal Y
Blanking zone, during later stage decoding, carrier chrominance signal C sequential is together controlled by the synchronizing signal decoded in luminance signal Y, is i.e. passing
Luminance signal Y and carrier chrominance signal C are reunified by the Cheng Shineng that is totally lost according to the clock signal decoded in luminance signal Y,
Easily recovering after making to be transmitted, simple flow also ensures the accuracy transmitted, and reduces the probability of error of transmission.
As the detailed description of the invention of a kind of improvement, as shown in Figure 6, chroma coder module 43 is by direct-type numerical frequency
The sinusoidal signal of the fixed frequency that synthesizer DDS produces is carried out with chromatic component U and V and colour burst signal as chrominance carrier
Quadrature amplitude modulation synthesis carrier chrominance signal C；Due to the characteristic of yuv format, its chromatic component is divided into two components of UV, in order to more preferably
The unified UV component in ground becomes carrier chrominance signal C beneficially transmission uniformly, and the sinusoidal signal that present invention employs fixed frequency is made
Carrying out quadrature amplitude modulation synthesis carrier chrominance signal C for chrominance carrier, wherein, sinusoidal signal produces according to DDS principle, concrete mistake
Cheng Wei: assuming that original clock frequency is Q, needing the frequency produced is P, and according to Nyquist law, P is less than or equal to Q/2.Use
The accumulator of 32, adds step-length P*232/Q of 32, by the accumulated value in each for accumulator moment at each clock time
Output, and it is re-fed into accumulator with 232 deliverys, the value after delivery is the phase place of required frequency.Using phase place as rope
Draw, inquire about certain table, the sine wave signal of required frequency can be produced；This row quadrature amplitude modulation synthesis carrier chrominance signal C obtains
Above-mentioned synthetic method has unified UV component so that chromatic component UV can be transmitted with the form of carrier chrominance signal C, simplifies transmission
Flow process, both synthesize the main road transmission channel that reduces, and are beneficial to unitized operation.
As the detailed description of the invention of a kind of improvement, color space convert unit 1 includes will according to NTSC or pal mode
RGB coded system video data is converted into the video data of the YUV coded system of correspondence；Generally have due to video signal NTSC and
Two kinds of standards of PAL, owing to both code encoding/decoding modes and field-scanning period are different, for TSC-system and pal video signal, RGB
Different to the chroma conversion formula of YUV；
Therefore the present invention is directed to above two standard and devise two set computing formula so that the turning of TSC-system formula and pal mode
Changing, for TSC-system formula, concrete conversion formula is:
Y=0.151*R+0.297*G+0.058*B
U=-0.074*R-0.147*G+0.221*B
V=0.312*R-0.261*G-0.051*B
For pal mode, concrete conversion formula is:
Y=0.160*R+0.314*G+0.061*B
U=-0.079*R-0.155*G+0.234*B
V=0.329*R-0.275*G-0.054*B
Twisted-pair feeder as shown in Figure 7 is the twisted-pair production schematic diagram of T568B standard.Twisted-pair feeder is by a pair mutual insulating
Plain conductor is stranded to be formed, and is conducive to resisting interfering between external electromagnetic wave interference and many twisted pair wires.Common multiple twin
Line cable comprises 4 pairs of twisted-pair feeders, and wherein 1, No. 2 lines kink, and 3,6 lines kink, and 4,5 lines mutually kink, and 7,8 lines mutually kink.
Below being only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for the art
For those of ordinary skill, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. the dispensing device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal, it is characterised in that: bag
Include be sequentially connected with color space convert unit (1), YUV gain control unit (2), image segmentation unit (3), parallel encoding list
Unit (4), D/A converting unit (5)；
Rgb format is converted into yuv format and by YUV gain control unit through color space convert unit (1) by video signal
(2) adjustment of YC is carried out；
Image segmentation unit (3) is divided into some subimages to the video signal after adjusting；
Parallel encoding unit (4) carries out brightness Y to subimage, colourity UV is encoded separately and passes through D/A converting unit (5) is converted into
Analogue signal is to be transmitted on twisted pair transmission line.
Dispensing device the most according to claim 1, it is characterised in that: described image segmentation unit (3) includes a scanning
Unit (31), this scanning element (31) includes three scanning devices (311), and described scanning device carries out three interlacing and sweeps video signal
Retouch, final acquisition four width subimages.
Dispensing device the most according to claim 1 and 2, it is characterised in that: also include concurrency control unit (6), described also
The subimage that row control unit (6) is formed through image segmentation unit (3) by parallel control on-off control and is advanced into simultaneously
Parallel encoding unit (4).
4. according to the dispensing device described in claim 1 or 2 or 3, it is characterised in that: described parallel encoding unit (4) includes four
The number one_to_one corresponding of individual encoder (41), described encoder (41) and subimage.
Dispensing device the most according to claim 4, it is characterised in that: described encoder (41) includes discrete brightness
Coding module (42) and chroma coder module (43), described subimage forms luminance signal Y, warp after luminance coding module (42)
Chroma coder module (43) forms carrier chrominance signal C afterwards.
Dispensing device the most according to claim 5, it is characterised in that: it is same that described luminance coding module (42) includes sequential
Step unit (421), described timing synchronization unit (421) generates clock signal and is attached in luminance signal Y.
Dispensing device the most according to claim 5, it is characterised in that: chroma coder module (43) is by direct-type numeral frequency
The sinusoidal signal of the fixed frequency that rate synthesizer DDS produces is entered with chromatic component U and V and colour burst signal as chrominance carrier
Row quadrature amplitude modulation synthesis carrier chrominance signal C.
Dispensing device the most according to claim 1, it is characterised in that: color space convert unit (1) is according to NTSC or PAL
RGB coded system video data is converted into the video data of the YUV coded system of correspondence by standard.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610864288.6A CN106303345A (en) | 2016-09-29 | 2016-09-29 | A kind of dispensing device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal |
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| CN201610864288.6A CN106303345A (en) | 2016-09-29 | 2016-09-29 | A kind of dispensing device utilizing Double-strand transmission super large resolution and superelevation frame per second video signal |
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| CN113055675A (en) * | 2019-12-26 | 2021-06-29 | 西安诺瓦星云科技股份有限公司 | Image transmission method and device and video processing equipment |
| CN113839998A (en) * | 2021-09-18 | 2021-12-24 | 北京百度网讯科技有限公司 | Image data transmission method, device, equipment, storage medium and program product |
| CN115766976A (en) * | 2022-11-09 | 2023-03-07 | 深圳市南电信息工程有限公司 | Image display system and control method thereof |
| CN113839998B (en) * | 2021-09-18 | 2024-04-12 | 北京百度网讯科技有限公司 | Image data transmission method, apparatus, device, storage medium, and program product |
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