SECAMstandardeihin

SECAM is a color television broadcast standard used in France, Russia, and many African countries. SECAM stands for Séquentiel Couleur à Mémoire, which translates to "Sequential Color with Memory." It was developed by the French company Compagnie Générale de Télégraphie Sans Fil (CSF) and introduced in 1967, making it the first operational color television system.

Unlike other color television systems like PAL and NTSC, SECAM transmits color information sequentially, line by line. Each line contains either red or blue color information, with the other color component being transmitted on the following line. A memory circuit in the receiver reconstructs the full color image. This sequential approach was designed to overcome some of the color fidelity issues experienced by earlier systems, particularly in long-distance transmissions.

SECAM uses a different method for encoding chrominance (color information) compared to NTSC and PAL. It employs frequency modulation for its color subcarrier, while NTSC and PAL use amplitude modulation. This modulation difference contributes to SECAM's robustness against certain types of signal interference. However, SECAM systems are not compatible with each other due to variations in the specific SECAM standards used (e.g., SECAM-L in France, SECAM-D/K in Russia). The complexity of the SECAM system also meant that receiving equipment was often more expensive than for other standards.