NTSC is one of the standard TV signal that used mostly in America and Japan. It scans 525 lines, and 30 frames in a second. In order to reduce flicker, it is scanned with even / odd number filter.......
PAL is one of the standard TV signals that used mostly in Europe and South East Asia. It scans 625 lines, and 25 frames in a second. Like NTSC, it is scanned with even / odd number filter.......
It is a displaying defect of pixel unit which shows on active type of TFT. The property of such defect is when the light is blocked and shows white defect while displaying black color and vice versa.......
