NTSC stands for National Television System Committee, and it is used in North America, Japan, and some other countries. NTSC uses a frame rate of 30 frames per second (fps) and a resolution of 525 lines.
PAL stands for Phase Alternating Line, and it is used in Europe, Asia, Africa, and Australia. PAL uses a frame rate of 25 fps and a resolution of 625 lines.
The main difference between NTSC and PAL is the way that they handle colour information. NTSC uses a composite video signal, which means that the colour information is combined with the brightness information. PAL uses a component video signal, which means that the colour information is separate from the brightness information. This results in a better picture quality for PAL.
Another difference between NTSC and PAL is the way that they handle vertical blanking intervals (VBIs). VBIs are periods of time when the television signal is not being used to transmit image information. NTSC uses the VBI to transmit closed captioning information, while PAL uses the VBI to transmit teletext information.
Finally, NTSC and PAL use different frequency ranges. NTSC uses a frequency range of 54MHz to 88MHz, while PAL uses a frequency range of 47MHz to 68MHz.
Here is a table that summarizes the key differences between NTSC and PAL:
| Feature | NTSC | PAL |
|---|---|---|
| Frame rate | 30 fps | 25 fps |
| Resolution | 525 lines | 625 lines |
| Colour information | Composite video signal | Component video signal |
| Vertical blanking intervals | Used for closed captioning | Used for teletext |
| Frequency range | 54MHz to 88MHz | 47MHz to 68MHz |