NTSC Vs. PAL
NTSC and PAL are two types of color encoding systems that affect the visual quality of content viewed on analog televisions and, to a much smaller degree, content viewed on HDTVs. While NTSC delivers a frame rate of 30 frames per second (fps) at an aspect ratio of 720x480, PAL uses a frame rate of 25 fps and a 720x576 aspect ratio. The PAL system offers automated color correction compared to NTSC's manual color correction. The NTSC standard is popular in places like the U.S. and Japan, while PAL is more common in countries such as the UK, Australia, and Sweden.
There is a third standard, called SECAM (Sequential Couleur Avec Memoire or Sequential Color with Memory), that is used in Eastern Europe and France.
NTSC versus PAL comparison chart
|Color Subcarrier Frequency|