Analysis Of Two Methods For Processing Fixed LED Video Display Image Signals

- Jan 25, 2019-

Nowadays, Fixed LED Video Display has become a new medium for transmitting information in our lives, which can show people a colorful picture. Then, how to realize various information such as text, graphics, animation, images and video programs, the following is a brief introduction to the processing method of the video signal by the Fixed LED Video Display.

Since the light-emitting diode is a semiconductor component, the switching time is calculated in seconds, no memory function, large display area, long signal transmission interval, and can not be selected by the most advanced COG, SOB and other large volume circuits, so the LED screen is driven. The reduction in power consumption, the improvement in power, the reduction in color retention, and consistency are more difficult than in other flat panel displays. Fixed LED Video Display is a digital flat panel display with two methods for processing image signals:

The first: multimedia methods, often referred to as the sync screen method.

This method captures TV signals with a common multimedia card, and performs mediation, filtering, and tone separation. Then, the image signal is subjected to A/D conversion, and then MPEG encoded and compressed for storage. When we play it, we need to decompress it and play it directly on the computer monitor.

The signal transmitted by the Fixed LED Video Display is obtained from the DVI interface of the computer or the graphics card through a dedicated interface card, and some processing is performed on the interface card. At this time, the Fixed LED Video Display is actually equivalent to a computer monitor or a part of it, usually called a window, which can realize one-to-one synchronous display. Since the computer monitor is progressively scanned, the display format of the Fixed LED Video Display will be the format of the monitor if no frame filtering is performed on the transmitted signal.