Secam

SECAM

(SEquential Couleur Avec Memoire, Sequential Color with Memory) A color TV standard from France that was officially introduced in 1967. Although development began in 1956, it took time to convert from the earlier French 819-line system.

SECAM broadcasts 25 interlaced frames per second (50 half frames per second) at 625 lines of resolution, 576 of which are the visual frame. Used in France and Russia and other countries in Africa, Eastern Europe and the Middle East, several countries have switched from SECAM to PAL, and production equipment for SECAM is no longer made. Today, almost all work is done in component video systems that support 576 scanning lines (SECAM and PAL) or composite video (PAL) and converted to SECAM for transmission. See NTSC, PAL and YUV.

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Secam 

the name of a color television system that is compatible with the black-and-white system and differs from other color television systems in that two color-difference signals are transmitted alternately (sequentially) while the luminance signal is transmitted continuously. The word “SECAM” is formed from the first letters of the French phrase [systè me] séquentiel couleursá mémoire, which means “sequential color television system with a memory.” The system was put forward by the French engineer H. de France in 1958. It has been adopted in several countries, including France and the USSR.