Sue Zann Toh

Quick explanation:

In general, the higher the number of lines per frame, the better the picture quality. The higher the frame rate, the smoother the video, that is, less flicker.

PAL is the video system where the picture shows 625 lines at with a frame rate of 50 Hz. This means you get a picture which is higher detail, but since the refresh rate of the frame is slower, there may be some frame flicker and picture noise.

NTSC broadcasts at 525 lines per frame at a frame rate of 60 Hz. You may get less picture quality and detail than the PAL system, but the video will run smoother and with less flicker and picture noise.

Typically, game consoles are been produced for three systems,

1. PAL for Europe, Australia (List of countries that use PAL)
2. NTSC-U for U.S.A (List of countries that use NTSC)
3. NTSC-J for Japan (List of countries that use NTSC)