Principle Analysis of LED Full Color Screen Video Processor

What is the role of the video processor on the LED full-color screen? In the early 1990s, it had mature 16-level grayscale 256-color video control technology and wireless remote control and other advanced technologies in the country. Video control technology, cluster warpless control, multi-level group control technology and other aspects have domestic advanced technologies and products that have reached the international level; while my country's LED full-color screen industry is developing on a large scale, product technologies have been introduced and new ones have been maintained. level. Large-scale integrated circuits for LED screen control have also been developed, produced and applied by domestic enterprises. The development of LED full-color screens is inseparable from the help of video processors. So, how does LED video processors improve the imaging effect of the display screen? With the advancement of IC technology and the development of processor technology, DSP, RISC The processors of three different technologies, VLIW and VLIW, are gradually unified, and the current multimedia processor integrates the three processor technologies. SOC technology is developing very rapidly, and VIDEO PROCESSOR is already very powerful. The video processor integrates many peripheral circuits, including VI unit (VIDEOINUNIT), VO unit (VIDEOOUTUNIT), AI unit (AUDIOINUNIT), AO unit (AUDIOOUTUNIT), and some internal coprocessors, such as variable length coder/decoder VLX , motion prediction ME, DMA controller, IIC controller, etc. The integration of these IP modules greatly enhances the processing capability of VP, and these VPs also appear under the name of DSP. The video processor is the witness and symbolic device of the birth, growth and maturity of the LED full-color display. The video processing equipment dedicated to the LED is also gradually becoming mature in this process. The quality of the LED video processor directly affects the LED full-color display. The display effect of the color screen. In general, the led video processor is a dedicated video processor for led. The task it needs to complete, in simple terms, is to convert the image signal from the outside (such as Blu-ray DVD, computer, high-definition player box, etc.) into a signal that the LED full-color screen can accept. How does the led video processor complete the perfect presentation of the display screen? It mainly includes the following points: 1. The display mode of the screen zoom LED full-color screen is point-to-point, which determines that the LED full-color display screen can only display the size of its own physical resolution consistent picture. The led video processor can scale the image, output the picture in any size, and complete the mapping of the entire desktop to the led screen. Whether the resolution is increased or decreased, the full image can be displayed on the screen. 2. Conversion of resolution specifications Generally speaking, the signal resolution provided by image signal sources (such as Blu-ray DVD, computer, high-definition player box, etc.) has fixed specifications (refer to VESA, ITU, SMPTE and other standards), while LED full-color screen The modular mosaic display of , makes its resolution almost any value. The video processor converts various signal resolutions into the actual physical display resolution of the LED full-color screen. 3. Signal Conversion and Switching Video processing equipment can complete format conversion among many signals. Another important function of the video processor is to manage various signals when multiple signals are connected, and to switch between various signals flexibly and quickly. 4. Image quality improvement Digital image processing technology has developed from the 1920s to the present, and a large number of patented technologies have emerged. Such as DCDi, ACC2, ACM3D and a series of patented technologies of Faroudja Lab, which won the Emmy Award. These technologies have undoubtedly greatly improved the visual effect of the image. The pixel pitch of LED full-color screen is much larger than that of some other flat panel display media. Therefore, there are strict requirements for image processing technology, especially image enhancement technology. A high-quality LED video processor can use advanced algorithms to modify signals with poor image quality, perform a series of processing such as deinterlacing, edge sharpening, motion compensation, etc., to enhance image details and improve picture quality. 5. Large-screen splicing At present, the dot pitch of LED full-color screens is getting smaller and smaller, and the external dimensions are becoming larger and larger, which makes the physical resolution of the LED screen become very large. The led video processor has a splicing function and can drive large-resolution screens, which is a very cost-effective driving method. 6. Multi-picture processing In many special scenarios, a display screen needs to display multiple pictures of the same or different signals. A video processor with multi-picture processing function can flexibly meet such display requirements. 7. Bit depth improvement The gray level of the current LED full-color screen has been raised to 16 bits and 17 bits, but most of the input signal sources are only 8 bits. Therefore, following the footsteps of the high-definition display era, the application of 10-bit or even 12-bit processing technology in video processors has become the general trend. Eight, color space conversion The color gamut of the LED display is very wide, and the color space of most image signals is relatively small (such as NTSC). In order to make the LED full-color screen have excellent image display effect, color space conversion must be carried out. This article is collected and organized by China Logo Network. For more information, please visit Logo Business School. Shenzhen Lianhuiye is a professional LED full-color screen manufacturer, high-quality products. .