SECAM
SECAM, also written SÉCAM (French pronunciation: [sekam], Séquentiel couleur avec mémoire, French for "Sequential Color with Memory"), is an analog color television system first used in France. A team led by Henri de France working at Compagnie Française de Télévision (later bought by Thomson, now Technicolor) invented SECAM. It is, historically, the first European color television standard. SECAM is in the process of being phased out and replaced by DVB.
History
Work on SECAM began in 1956. The technology was ready by the end of the 1950s, but this was too soon for a wide introduction. A version of SECAM for the French 819-line television standard was devised and tested, but not introduced. Following a pan-European agreement to introduce color TV only in 625 lines, France had to start the conversion by switching over to a 625-line television standard, which happened at the beginning of the 1960s with the introduction of a second network.
The first proposed system was called SECAM I in 1961, followed by other studies to improve compatibility and image quality.