LED video processor is also called picture processor, image converter, video controller, image processor screen converter, video format converter independent video source.

The LED video processor is the full-color display, growth and maturity of the picture processor. The quality of the LED video processor directly affects the display effect of the LED display.The binding use of LED video processor and display screen greatly facilitates the wide application of end users and improves the depth of LED display.

Full-color LED multi-screen video image processor is a high-performance image processing and control device for full-color LED launched by the national high-tech enterprise.The equipment integrates years of rich experience in video image processing, high resolution signal processing and display, adopts patented technology hardware design, combines with special requirements of full-color LED display screen design, can accept and process a variety of video graphic signals at the same time, and displays on full-color LED display.

So how does an LED video processor work, you know?Let me introduce it to you.

I. resolution and specification conversion: generally, the signal resolution provided by image sources (such as blu-ray DVD, computer, hd playback box, etc.) has a fixed specification (refer to standards like VESA, ITU and SMPTE), while the modular splicing display of LED display makes its resolution almost arbitrary.The video processor converts various signal resolutions into the actual physical display resolution of the LED display.

2. Color space conversion: the LED display has a wide color range, while the color space of most image signals is relatively small (such as NTSC).In order for the LED display to have a good image display effect, color space conversion must be carried out.

Iii. Bit depth promotion: currently, the gray level of LED display has been increased to 16 and 17 bits, but most input sources are only 8 bits.Therefore, with the advent of the high-definition display era, the application of 10-bit and even 12-bit processing technology in video processors has become an inevitable trend.

4. Zoom: in the conversion process of resolution specification, the image needs to be zoomed and zoomed. Whether the resolution is increased or decreased, the whole image can be displayed on the screen.

V. image processing and enhancement technology: digital image processing technology developed from the 1920s to the present, a large number of patented technologies have emerged.For example, DCDi, ACC2, ACM3D and other emmy award-winning Faroudja laboratory‘s series of patented technologies.These techniques have undoubtedly improved the visual effects of images.

LED display video processor 9 functions and technical features

1. Detail enhancement

The core of this technology is not only the sharpening of image edges, but also the color reduction and image zoom processing.Video processor this indicator directly reflects the LED display image clarity.

2. NoiseReducTIon

Due to the dot matrix characteristic of LED display, the negligible noise in other display media will greatly challenge the psychological tolerance of LED display audience.Noise mainly comes from the compressed noise (Mosaic) of video signal and the random noise of the system itself. The excellent video processor can reduce the interference of noise to the quality of the picture to the maximum extent through noise suppression.

3. GrayScale

The gray level has always been the goal of LED display providers, but most of the technical teams have been solving the gray level problem of LED screen scanning itself, and the gray level processing has been improved to the current level of 16bit and 17bit.However, the problem that the input source is only 8bit is ignored.The 8bit source gives most people‘s grayscale work a bit of a castle in the air.Solving the problem of video processor gray level processing is one of the most important key technologies to improve the whole LED display quality.With the advent of the current high-definition display era, the application of 10bit processing technology in video processor is an irresistible trend.

4. Format conversion function

Consumption in the field of PC camp (VESA) signal formats and consumption field or in the field of professional video camp (ITU and SMPTE) signal formats across the era of era of analog signals to digital signals and the current of the early enlightenment hd display, birth and during the legacy of many signals format and standards are still active or work in the consumer market, so need in most engineering bidding by video processor solve the problem of access, signal processing and display.The fundamental solution lies in the fact that video processing device can complete the format conversion between various signal formats, which includes the following:

The signal format conversion of VGA~UXGA of the camp involves the processing of signal input interface VGA (analog), dvi-d (digital), HDMI (digital) and Displayport.

As well as the SMPTE camp‘s 480i~1080p60 signal format conversion, digital bandwidth from 143Mbps across to 3G height.It involves the processing of composite video (analog), s-terminal (analog), standard clear component (YCbCr), HD component (YPbPr), sd-sdi (digital) and hd-sdi (digital) of the signal input interface.

Interconvert between formats is called UpConvert (a conversion from VGA to XGA, for example) or DownConvert (a conversion from UXGA to XGA);The conversion from SMPTE to VESA format is called CrossConvert (for example, the conversion from composite video to XGA);

5. Color space conversion function

The color space is much larger than the NTSC color space of TV signals. Therefore, if the RGB color space of NTSC is directly used in the display screen to control the LED three-base color luminescence, color deviation will be generated and the display effect of LED display will be seriously affected.Therefore, video processor is required to transform the color space, that is, CCIR601 and CCIR709 to RGB color space.This is also the fundamental reason that LED dedicated video processor is required to realize the conversion of VESA and ITU and SMPTE signal format to VESA standard signal format when completing the format conversion function.

6. Image processing and enhancement technology

Full-color large-screen display not only involves the image processing technology involved in general image display processing, such as 3:2 and 2:2 pull-down, because its pixel spacing is much higher than that of other display media. Therefore, there are more stringent requirements for image processing technology, especially image enhancement technology, including:

7. Sports compensation

Motion compensation for slow and fast images is involved.Good motion compensation technology can reduce the sawtooth phenomenon of moving image edge when LED display;

8. De-interlace

In order to reduce the bandwidth of video signal, interlaced scanning technology must be adopted to improve the resolution.

It is necessary to preprocess the interlaced scan signal to turn the line - by - line signal.Excellent deinterlacing technology can eliminate the scan line effect in field broadcast and shooting.

9. Scale

The display is modular in design, so the requirements for image and video display are higher, especially the display resolution of each engineering application can hardly be found in VESA standard.Therefore, the video processor is required to provide scaling capabilities.Typical zoom features are as follows:

Image reduction:

The lattice resolution used in general display engineering is under the XGA (1024*768) resolution of VESA standard.The video processor is required to reduce the signal of access to the resolution of the corresponding terminal. It is best to require the video processing device to have the function of point-by-point pixel scaling (point-by-point pixel scaling can be carried out simultaneously in horizontal and vertical directions).

Image enlargement:

More and more engineering applications, especially the rapid development of business such as building advertising, LED display resolution is no longer limited to the conventional XGA resolution, some engineering applications even reach the scale of 2048 level (including pixel sharing).In these applications, video processor is required to have image magnification enhanced processing technology. The key indicator is that the internal processing bandwidth of video processor can reach or exceed the lattice area of 2048x1536 in non-typical applications.For this kind of application, video processor is required to have the function of stack and complete the final lattice display through the stitching of multiple video walls.

Importance of LED video processors

LED video processor is the whole-process witness and key equipment for the birth, growth and maturity of LED full-color display screen. The advantages and disadvantages of LED video processor directly affect the display effect of LED display screen.

Video processor is the full-color LED display, growth and maturity of the entire witness and landmark equipment, LED special video processing equipment in this process has gradually become mature, the advantages and disadvantages of LED video processor directly affect the display effect of LED display.In the era of LED display hd, the video processor not only carries a lot of work such as image processing and analysis, encoding and decoding and compression, but also embeds a large number of intelligent analysis algorithms to analyze massive data.The binding use of LED video processor and display screen greatly facilitates the wide application of end users and improves the depth of LED display.