Inverter Color TV is a new generation of flicker-free, high-definition digital TV launched by Xoceco Group, the national key high-tech enterprise, and its viewing performance is comparable to that of HDTV. It is compatible with digital and analog TV signals. Therefore, it is digitized. Inspur will become the mainstream product that eliminates traditional analog TVs.
What is a variable frequency color TV?
In fact, the â€œfrequency conversionâ€ mentioned here means â€œchanging the scanning frequency.â€ Zengâ€™s TV uses an interlace scanning method with a field scanning frequency of 50 Hz, which means that a complete frame is scanned in two passes to complete each A scan is called a field.
The first field scans only odd-numbered lines, ie, lines 1, 3, 5, 7..., and is called the A field.
The second field only scans even-numbered lines, that is, lines 2, 4, 6, 8, etc., which are called B-fields.
Due to the eye-retention effect of human eyes, these two signals will be felt to form a complete picture. In this scanning mode, since the images alternately appear at a slow speed, people may feel that the screen has a large-area flicker phenomenon, and long-term viewing may cause visual fatigue. Especially for large-screen color TVs, this flaw is more pronounced. Inverter TV is developed to solve this problem.
How is frequency conversion implemented?
First of all, it is necessary to digitize the analog television signal, decompose the entire picture into pixels, and then use digital image processing techniques to perform interpolation operations on the pixels corresponding to the stored pictures and perform motion compensation on the moving picture. Generate insert screens to increase the number of screens displayed per second to reduce the flicker of the human eye.
At the same time, pixels can be interpolated in each picture, making the picture more delicate. When the pixels of the picture increase or the resolution increases, the bandwidth of the display circuit is required to be increased, thereby placing higher requirements on the TV line field driving circuit.