E-true color LED display shows the image of several key technology acquisition -- College -- XIAMEN HOTSTON TECHNOLOGY CO.,LTD.--Government agencies of various indoor and outdoor LED electronic display screen LED display system LED supply LED LED Buy Buy LED suppliers buyers LED lights LED display LED traffic lights LED Lighting LED Lighting LED Lighting LED

Image Acquisition Technology

LED electronic display to show true color images, we must first solve the real-time video signal acquisition, analog video signals to digital video image capture. Early practice is to use video capture card and with some of the characteristics of the population (Feature-connect) of VGA card combination to achieve.

Video capture card to capture video images, and then through the VGA port characteristics of the market access frequency, the frequency, frequency pixel color look-up table, as well as the address of the index, tracking the CRT image can reproduce the color table to find ways to get red, green Blue separation of the digital signal. One approach is to use software to copy from time to time, and the other is the use of technology hardware theft, which is more effective and rapid.

As a result of this technology there is a VGA card compatibility with the poor, the edge was not clear, the images are of poor quality, and other shortcomings, the electronic display shows the image quality is also limited, to that end, Beijing Computer Galaxy in 1998, research and development LED electronic display a dedicated video card JMC-LED.

The card in the PCI bus, using 64-bit graphics accelerator, VGA and video functions will be merged with the VGA video data is responsible for data overlay, color space conversion, the fundamental solution to the problem of compatibility. Application of full-screen resolution acquisition, YUV4: 2:2 compression-free storage technology to ensure the best video images, video window EST use edge enhancement technology, scaling to ensure the clarity of image after. PAL format and support for NTSC, video windows can zoom, move.

The electronic cards can display video player required for field frequency, the frequency, the number of pixels frequency signals simultaneously extracted, and red, green and blue signals separated. 8:8:8 digital RGB format, can generate 256 gray, true color display panels to meet the players.

Reference link: http://www.17led.com/LEDdisplay/2008-04/48p2.html