video standards;

NTSC

National Television System Committee;

The NTSC format consists of 29.97 interlaced frames of video a second, each consisting of 480 lines of vertical resolution out of a total of 525 (the rest are used for sync, vertical retrace, and other data such as captioning).

PAL

Phase Alternating Line;

PAL describes the way that part of the part of the colour information on the video signal is reversed in phase with each line, which automatically corrects phase errors in the transmission of the signal. The PAL colour system is usually used with a video format that has 625 lines per frame and a refresh rate of 25 frames per second.

SECAM

Sequential Couleur Avec Memoire/Sequential Colour with Memory;

SECAM is an analog television system, using frequency modulation to encode chrominance information. It is so named because it uses memory to store lines of color information, in order to eliminate the color artifacts found on systems using the NTSC standard.

Australia uses the PAL standard.