How does LED video processor complete the perfect display of LED display?
Author:Mr. Gao 2 Time:2021-09-10 11:23 Browse(351)
Hello, video processor is the witness and landmark equipment of the birth, growth and maturity of LED full-color display screen. In this process, led special video processing equipment is gradually becoming mature. The advantages and disadvantages of LED video processor directly affect the display effect of LED display screen. In general, LED video processor is a special video processor for LED. The task it needs to complete is simply to convert the image signal from the outside (such as Blu ray DVD, computer, HD player box, etc.) into the signal that the LED display can accept. The quality of LED video processor directly affects the display effect of LED display screen.
Hello, video processor is the witness and landmark equipment of the birth, growth and maturity of LED full-color display screen. The LED special video processing equipment is gradually becoming mature in this process. The advantages and disadvantages of LED video processor directly affect the display effect of LED display screen.
in general.
LED video processor, It's a special video processor for LED.

How does LED video processor complete the perfect display of LED display?

and the task it needs to complete.
in short, it will come from the outside (such as Blu ray DVD, computer The quality of LED video processor directly affects the display effect of LED display.

how does LED video processor complete the perfect display of LED display? It mainly includes the following points:

first, image zooming

the display mode of LED display screen is point-to-point.
this determines that the LED display screen can only display images consistent with its own physical resolution size.
the LED video processor can zoom the image.
output the image in any size, The whole desktop is mapped to the LED screen.
whether the resolution is increased or decreased.
the complete image can be displayed on the screen.


2. Resolution specification conversion

generally speaking.
the signal resolution provided by the image signal source (such as Blu ray DVD, computer, HD player box, etc.) has a fixed specification (refer to VESA, ITU, SMPTE, etc.), However, the modular splicing display of LED screen makes its resolution almost any value.
the video processor converts various signal resolutions into the actual physical display resolution of LED screen.
in this paper, the design of the video processor is introduced

3、 Signal conversion and switching

the video processing equipment can complete the format conversion between many signals.
another important function of the video processor is to manage various signals when there are multiple access signals.
it is flexible to switch between various signals quickly.


4 Image quality improvement

digital image processing technology has developed from the 1920s to now.
a large number of patented technologies have emerged.
for example, DCDI, ACC2 Acm3d and other Emmy award-winning faroudja laboratory's a series of patented technologies.
these technologies undoubtedly improve the visual effect of the image.
the pixel spacing of the LED display screen itself is much larger than some other flat panel display media.
therefore, for the image processing technology, In particular, image enhancement technology has strict requirements.
high quality LED video processor can use advanced algorithms to modify the signal with poor image quality.
perform a series of processing, such as de interlacing, edge sharpening, motion compensation, etc., to enhance the details of the image and improve the image quality.


v Large screen splicing

at present, the point spacing of LED display screen is getting smaller and smaller.
the overall size is becoming larger and larger, which makes the physical resolution of LED screen become very huge.
LED video processor has splicing function.
it can drive large resolution screen, which is a cost-effective driving method.


VI Multi picture processing

in many special scenes, a display screen needs to display multiple pictures with the same or different signals.
video processor with multi picture processing function,It can flexibly meet such display requirements.


seven bit depth upgrade

currently, the gray level of LED display has been upgraded to 16 bits and 17 bits.
however, most of the input signal sources are only 8 bits.
therefore,
following the pace of the era of high-definition display, The application of 10 bit or even 12 bit processing technology in video processor is the general trend Color space conversion

the color gamut of LED display is very wide.
however, the color space of most image signals is relatively small (such as NTSC).
in order to make LED display have excellent image display effect.
color space conversion must be carried out.


summary: in the era of high-definition LED display.
video processor not only carries the functions of image processing and analysis, but also the functions of image processing A lot of work, such as encoding, decoding and compression, will also embed a large number of intelligent analysis algorithms to analyze massive amounts of data.
outdoor display screen is affected by regional weather.
different day and night, sunny and rainy days, how can LED screen display a perfect picture with the change of weather? This requires the video processor to have more excellent image quality improvement ability, with advanced image scaling algorithm, to ensure that the video image after scaling processing, to maintain the image clarity and gray level to the greatest extent.
in addition.
it also requires the video processor to have a wealth of image adjustment options and effects, to process the image brightness, contrast and gray level, To ensure the soft and clear screen output.
please refer to the webpage link     I hope you can solve your problem.
the quality of the video processor directly affects the display effect of the LED display screen.
the quality of the video processor directly affects the display effect of the LED display screen
The application of video processing equipment in LED full-color display needs to solve the following key problems:
1) format conversion function
the signal format of the PC camp (VESA organization) in the consumer field and the video camp (ITU and SMPTE organization) in the consumer field or professional field span from the era of analog signal to the era of digital signal, and even the current high-definition display in the early Enlightenment period.
the development of video processing equipment in LED full-color display needs to be improved Many signal formats and standards that were born and left over from the past are still active or working in the consumer market. Therefore, in most project bidding, it is necessary to solve the problems of signal access, signal quality control and signal quality control through video processor The fundamental solution is that the video processing equipment can complete the format conversion between many signal formats.
that includes the following:
Vega to uxga signal format conversion of VESA camp, which involves the processing of signal input interface VGA (Analog), DVI-D (digital), HDMI (digital) and DisplayPort<
the signal format conversion from 480i to 1080p60 of ITU and SMPTE camp, and the digital bandwidth span from 143mbps to 3G.
it involves the processing of composite video (Analog), s terminal (Analog), standard definition component (YCbCr), high definition component (YPbPr), SD SDI (digital) and HD SDI (digital) of signal input interface the conversion from ITU and SMPTE to VESA format is called cross conversion, such as the conversion from composite video to XGA
2) color space conversion function
LED color space is much larger than NTSC color space of TV signal,Therefore, if the RGB color space of NTSC is directly used to control the three primary colors of LED in the display screen, the color deviation will occur, which will seriously affect the display effect of LED display screen.
therefore.
the video processor is required to complete the color space conversion, That is, the conversion of ccir601 and ccir709 to RGB color space.
this is also the fundamental reason why led special video processor needs to realize the conversion of VESA, ITU and SMPTE signal formats to VESA standard signal formats.

3) image processing and enhancement technology
LED full-color large screen display is a member of flat panel display media.
it is not only related to general images The image processing technology involved in display processing, such as 3:2 and 2:2 pull-down, has more strict requirements for image processing technology, especially for image enhancement technology, because its pixel spacing is much larger than other flat panel display media, such as LCD and PDP, It includes the following:
motion adaptive.
it involves the motion compensation of slow image and fast image.
good motion compensation technology can reduce the jagged phenomenon of moving image edge when LED display<
de interlace.
in order to reduce the bandwidth of video signal.
to improve the resolution, interlaced scanning technology must be used.
when LED displays, interlaced signals need to be preprocessed and converted to progressive signals.
excellent de interlaced scanning technology can eliminate the scan line effect in live broadcast and shooting<
the LED display adopts the modular design and splicing display.
therefore, it is the most flexible display medium among all flat panel display media.
the LED display adopts the modular design and splicing displayHowever, this flexibility also brings higher requirements for image and video display.
in particular, the display resolution of every engineering application can hardly be found in the VESA standard.
therefore, the video processor is required to provide the zoom function.
the typical zoom function is as follows:
image zoom: the lattice resolution of general display engineering applications is within XGA (1024) of VESA standard *
the video processor is required to be able to reduce the connected signals to the resolution of the corresponding terminal.
it is better to require the video processing equipment to have the function of pixel by pixel scaling (pixel by pixel scaling can be carried out in the horizontal and vertical directions simultaneously).

image magnification: more and more engineering applications.
in particular, the increase of building advertising and other services By leaps and bounds, the resolution of LED display is no longer limited to the conventional XGA resolution, and some engineering applications even reach the level of 2048 points (including pixel sharing).
in similar applications.
video processor is required to have the enhancement processing technology of image magnification, The key index is that the internal processing bandwidth of the video processor can reach or exceed the lattice area of 2048x1536 in atypical applications.
to cooperate with such applications.
the video processor should have the stack function, The final dot matrix display is achieved by splicing multiple video walls.

the technology of video scaling is closely related to the key technologies of motion compensation and deinterlacing.
the advantages and disadvantages of the scaling technology directly affect the fluency of the LED large screen display image and video.

the core of this technology is not only reflected in the sharpening of the image edge.
the key technology of video scaling is not only reflected in the sharpening of the image edgeAt the same time, it includes color restoration and image zooming.
the quality of video processor directly reflects the image clarity of LED large screen display.

noise reduction.
due to the lattice characteristics of LED display.
in other flat panel display media, the noise is negligible, The noise mainly comes from the compression noise (mosaic) of the video signal and the random noise of the system itself.
excellent video processor can suppress the noise,

gray scale is always the goal of LED large screen display suppliers.
but for a long time, most of the technical teams have been solving the problem of gray scale of LED screen scanning, and the gray level processing has been upgraded to the current 16bit, 17bit.
but it ignores the problem that the input signal source has only 8bit.
8bit of the signal source makes the gray level improvement of most people seem to be a castle in the air.
solving the problem of gray level processing of video processor is one of the most important key technologies to improve the quality of the whole LED display.
combined with the advent of the current era of high-definition display.
10bit processing technology is widely used in video processing The application in processor is the general trend.
.
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