The large-screen LED display system is the basic carrier of various information transfers, and it is responsible for the real-time information release tasks of news, news, culture and business. The eye-catching display effect is delivered to the public in the first time. At this time, the LED display screen can give full play to its superior video functions and color performance, and at the same time play the role of beautifying the environment and improving environmental facilities.
However, the LED video processor is the core device in the LED display application, and plays a vital role in the application. 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 amounts of high-definition data, which plays a more important role. Simply put, LED video processor, LED video splicer, multi-picture processor, is a video processor dedicated to LED. And the task it needs to complete is to convert the image signal from the outside (such as Blu-ray DVD, computer, high-definition playback box, etc.) into a signal that the LED display can accept, and perform certain optimization processing on the video image to make the LED The picture displayed on the screen is clearer and smoother. It plays the following key roles in the video and image display process
Detail enhancement
The core of this technology is not only reflected in the sharpening of the edge of the image, 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.
Gray scale (GrayScale)
Gray level has always been the goal pursued by LED display suppliers, but all the time, most technical teams have been solving the gray level problem of the LED screen itself scanning, and the gray level processing has been raised to the current 16bit , 17bit. But it ignores the problem that the input signal source has only 8bit. The 8bit of the signal source makes the gray level improvement work of most people seem a bit of a castle in the air. Solving the problem of gray-level processing of video processors is one of the most important key technologies to improve the quality of the entire LED display. Combined with the advent of the current era of high-definition display, the application of 10bit processing technology in video processors is the general trend.
Format conversion function.
The VGA~UXGA signal format conversion of the camp involves the processing of the signal input interfaces VGA (analog), DVI-D (digital), HDMI (digital) and Displayport; and the conversion of the signal format of the SMPTE camp's 480i~1080p60, digital bandwidth From 143Mbps to the height of 3G. Involves the processing of signal input interface composite video (analog), S-terminal (analog), standard definition component (YCbCr), high definition component (YPbPr), SD-SDI (digital), HD-SDI (digital); mutual exchange between formats Conversion 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 (CrossConvert, such as composite video to XGA conversion );
Image processing and enhancement technology
Full-color large-screen display not only involves image processing technical issues involved in general image display processing, such as 3:2 and 2:2 pull-down, because its pixel pitch is much larger than other display media, so it is especially important for image processing technology Image enhancement technology has stricter requirements
So what are the characteristics of LED video processors?
1. Internal 12-bit digital processing, clearer images and richer colors
2. The maximum output resolution of DP stand-alone 2304*1152 The maximum resolution of conventional DVI port is 1920*1200
3. Support custom resolution output
4. Signal instant switching, fade in and fade out switching, various special effects switching effects
5. Support dual screen display
6. New timer play function and secret protection function
7. Two sending cards can be built in
LED video processor is the whole witness and key equipment for the birth, growth and maturity of LED full-color display. The quality of LED video processor directly affects the display effect of LED display. It is the guarantee that the LED display can display images and play sounds well, so the accurate selection of the video processor is particularly important. On the basis of understanding the above functions and features, the engineering company also needs to select the appropriate video processor according to the application of each project.
