Shenzhen Lianchengfa Technology Co., Ltd.

1. Detail enhancement

The core of this technology is not only reflected in the sharpening of image edges, but also includes the processing of color restoration and image scaling. The quality of this indicator of the video processor directly reflects the image clarity displayed on the LED display screen. 

2. Noise Reduction

Due to the dot matrix characteristics of LED display, the negligible noise in other display media will greatly challenge the psychological endurance of LED display audience. The noise mainly comes from the compressed noise (mosaic) of the video signal and the random noise of the system itself. Excellent video processors can minimize the interference of noise to the image quality itself through noise suppression.

3. GrayScale

Gray scale has always been the goal pursued by LED display suppliers, but most of the technical teams have been solving the gray scale problem of LED screen scanning itself, upgrading the gray scale processing to the current 16bit, 17bit. However, the problem that the input signal source is only 8bit has been ignored. The 8bit of the signal source makes most people's work of gray scale upgrading seem a little castle in the air. To solve the problem of gray level processing of video processor is one of the most important key technologies to improve the LED display quality. With the advent of the current high-definition display era, the application of 10bit processing technology in video processors is a general trend.

4. Format conversion function

The signal formats of PC camp (VESA organization) in the consumer field and video camp (ITU and SMPTE organization) in the consumer field or professional field span the analog signal era to the digital signal era and even the high-definition display at the beginning of the current enlightenment. Many signal formats and signal standards born and left over during this period are still active or working in the consumer market, Therefore, video processor is required to solve the problems of signal access, processing and display in most project bidding. The fundamental solution lies in that the video processing equipment can complete the format conversion between many signal formats, including the following:

The signal format conversion from VGA to UXGA of the camp involves the processing of signal input interfaces VGA (analog), DVI-D (digital), HDMI (digital) and Displayport;

As well as the signal format conversion from 480i to 1080p60 of the SMPTE camp, the digital bandwidth spans 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 mutual conversion between formats is called up conversion (UpConvert, such as VGA to XGA conversion) or down conversion (DownConvert, such as UXGA to XGA conversion); And SMPTE to VESA format conversion is called cross conversion (such as composite video to XGA conversion);

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 emission of the LED three primary colors, color deviation will occur, which will seriously affect the display effect of the LED display screen. Therefore, the video processor is required to complete the transformation of color space, that is, the transformation from CCIR601 and CCIR709 to RGB color space. This is also the fundamental reason why LED dedicated video processor requires the conversion of VESA, ITU and SMPTE signal formats to VESA standard signal formats when completing the format conversion function.

6. Image processing and enhancement technology

Full color large screen display is not only related to the image processing technology involved in general image display processing, such as 3:2 and 2:2 pull-down. Since the pixel spacing is far greater than other display media, there are more strict requirements for image processing technology, especially image enhancement technology, including the following:

7. Motion compensation

It involves motion compensation of slow image and fast image. Good motion compensation technology can reduce the sawtooth phenomenon of moving image edge when LED is displayed;

8. De interlace

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

During display, the interlaced signal needs to be preprocessed to progressive signal. The excellent de interlacing scanning technology can eliminate the scanning line effect existing in live broadcast and shooting;

9. Scale

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

Image reduction:

The lattice resolution of general display engineering applications is below the XGA (1024 * 768) resolution of VESA standard. The video processor is required to be able to reduce each signal accessed 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 performed simultaneously in the horizontal and vertical directions).

Image magnification:

With more and more engineering applications, especially the rapid development of building advertising and other businesses, the resolution of LED display is no longer limited to the conventional XGA resolution, and some engineering applications have even reached the level of 2048 points (including pixel sharing). In such applications, the video processor is required to have image amplification enhancement processing technology. The key indicator is that the internal processing bandwidth of the video processor can reach or exceed the lattice area of 2048x1536 in atypical applications. For such applications, the video processor is required to have the function of stack, and the final dot matrix display is completed through the splicing of multiple video walls.

The Importance of LED Video Processor

LED video processor is the 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.

The video processor is the witness and landmark equipment of the birth, growth and maturity of the LED full-color display screen. The video processing equipment dedicated to LED has gradually matured in this process. The advantages and disadvantages of the LED video processor directly affect the display effect of the LED display screen. In the high-definition era of LED display, the video processor not only carries a lot of work such as image processing and analysis, encoding and decoding 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 extensive application of end users and improves the depth of use of LED display screen.