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what is the LED video processor
Sep 09, 2017

led video processor

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LED video processor, also known as picture processor, image converter, video controller, image processor screen converter, video format converter independent video source.


Multi-screen full-color LED splicing image processor, stand-alone up to 16 different resolutions can also support the launch card, stand-alone can support 30720 * 1080 LED dot matrix. Multi-machine cascade can achieve unlimited range of LED dot matrix real-time dynamic display.


You can arbitrarily configure the launch card for LED dot matrix piling, you can freely choose the gray level. You can arbitrarily set the output of a single LED launch card dot matrix.


LED video processor principle


In the course of use, LED video processor generally need to complete the following process:


First, the resolution of the specifications conversion: In general, the image signal source (such as Blu-ray DVD, computer, HD playback box, etc.) to provide the signal resolution has a fixed specification (refer to VESA, ITU, SMPTE and other standards), and led display The modular splicing of the screen allows the resolution to be almost any value. The video processor converts a wide variety of signal resolutions into the actual physical display resolution of the led display.


Second, the color space conversion: LED display color gamut is very wide, and most of the image signal color space is relatively small (such as NTSC). In order to let the led display has excellent image display, must be color space conversion.


Third, the bit depth upgrade: the current led display gray scale has been raised to 16 bits, 17 bits, but the input signal source is only 8 bits. Therefore, following the arrival of the era of high-definition display, 10-bit or even 12-bit processing technology in the application of video processors is the trend.


Fourth, the zoom: resolution specifications conversion process, the need to scale the image, whether it is increased or reduced resolution, you can make the screen display a complete image.


Fifth, image processing and enhancement technology: digital image processing technology from the 20th century, 20 years to the present development, there have been a large number of patented technology. Such as DCDi, ACC2, ACM3D and other access to the Emmy Faroudja laboratory a series of patented technology. These technologies will undoubtedly make the visual effect of the image has been greatly improved.


LED video processor role


LED video processor, is the LED dedicated video processor. And it needs to complete the task, simply, that is, from outside (such as Blu-ray DVD, computer, high-definition playback box, etc.) image signal into the LED display can accept the signal. LED video processor has the following effects:


First, the image interception: cut a complete image of any small area, and zoom in on the entire LED display.


Second, the image zoom: the image zoom, the maximum magnification of 10 times.


Third, graphic overlay: used in the screen superimposed on another signal to complete the subtitle overlay and other functions.


Fourth, fade: between the two sources to do fade-like switch.


5, seamless switch: switch the signal source, the old and new screen replacement process will not be black, Huaping.


Six, multi-machine connection:


A) multi-machine connection state, can achieve multiple (more than two) between the source to do fade-out switch.


B) Multi-machine connection state, through the multi-machine template function, to achieve a variety of applications between the fast switching, see "template function."


7, synchronous follow: synchronous follow-up technology to ensure that the multi-machine splicing large-screen LED display, multi-screen screen integrity, synchronization.


LED video processor in high-definition led display applications


First, the resolution of the specifications conversion: In general, the image signal source (such as Blu-ray DVD, computer, HD playback box, etc.) to provide the signal resolution has a fixed specification (refer to VESA, ITU, SMPTE and other standards), and led display The modular splicing of the screen allows the resolution to be almost any value. LED video processor will be a variety of signal resolution into the actual display led display physical resolution.


Second, the color space conversion: LED display color gamut is very wide, and most of the image signal color space is relatively small (such as NTSC). In order to let the led display has excellent image display, must be color space conversion.


Third, the bit depth upgrade: the current led display gray scale has been raised to 16 bits, 17 bits, but the input signal source is only 8 bits. Therefore, following the arrival of the era of high-definition display, 10-bit or even 12-bit processing technology in the application of video processors is the trend.


Fourth, the zoom: resolution specifications conversion process, the need to scale the image, whether it is increased or reduced resolution, you can make the screen display a complete image.


Fifth, image processing and enhancement technology: digital image processing technology from the 20th century, 20 years to the present development, there have been a large number of patented technology. Such as DCDi, ACC2, ACM3D and other access to the Emmy Faroudja laboratory a series of patented technology. These technologies will undoubtedly make the visual effect of the image has been greatly improved.


How to avoid burning the LED video processor port


Electrostatic discharge (ESD) and countermeasures


The most common cause of damage to electronic components is electrostatic discharge (ESD). Especially in the dry winter, we wear more sweaters and other easy to produce static clothes, the human body may even produce tens of thousands of volts of static electricity, so direct touch the processor port instantaneous discharge may cause damage to components.


The solution to this problem is: touch the processor and other equipment, first touch the effective grounding of the device to remove static electricity, so go touch the device, it is relatively safe.


Leakage of current leakage


The leakage current of the device will cause the port chip to be burned. First of all, we first understand the concept of leakage current. Switching power supply in order to reduce interference, there will be a corresponding EMI filter circuit. But the existence of EMI circuit, making the switching power supply in the electricity after the city has a tiny current, which is leakage current.


Countermeasures:


1. The best way is to ground, the processor and the signal source are grounded, and with a multimeter to test the ground impedance or no AC voltage to ground, so even if the charged plug is no problem.


2. If the ground power outlet ground wire can not be guaranteed, it is best to operate the first signal line, and finally connected to the power line power, do not charge plug the signal!


The importance of grounding


As mentioned above, grounding is the prerequisite for ESD protection devices to maximize the role, but also to avoid leakage of the equipment on the human body damage, we can see the importance of grounding.


The Technical Challenge and Development Trend of LED Video Processor


Small spacing more and more popular, but the small distance LED display in order to achieve the desired display, can not do without the auxiliary video processor. Different from the outdoor LED large screen, small pitch LED in the image display by the constraints of a lot.


First, the brightness of the environment is different, the indoor environment brightness is low, so the brightness of the LED screen can not be as high as the outdoor This requires a better video processor to enhance the image quality, in particular, need more advanced image scaling algorithm, in order to ensure that high-definition video images after scaling to maximize the image to maintain the details of the sharpness and gray level. Second, there are a wealth of image adjustment options and adjustment effects, especially the image brightness, contrast adjustment and low gray processing, thus ensuring the screen indoor light environment, the output of soft, clear and structured screen.


Second, the indoor display is limited by the floor area, requiring the display of the highest possible video and image within the limited display area. This requires the video processor to have higher resolution image output capability, higher resolution and more channels of video image input capability.


Third, the traditional large-screen indoor applications for monitoring, command and control of the occasion of the large-screen display, these applications require large-screen high-definition, input signals, more real-time video window screen and flexible and fast for these images Manipulation and management.


LED video processor is a full-color LED display birth, growth and maturity of the whole witness and key equipment, LED video processor directly affects the merits of the LED display display.


Video processor is LED full color display birth, growth and maturity of the whole witness and iconic equipment, LED dedicated video processing equipment in the process also gradually mature, LED video processor directly affects the merits of the LED display Screen display. In the era of high-definition LED display, video processor not only carries a lot of image processing and analysis, codec compression and other large work, but also embedded a large number of intelligent analysis algorithm for massive data analysis. LED video processor and the use of the display binding, greatly facilitate the extensive application of end users to improve the depth of the use of LED display.