M. Georges Valensi (1889–1980) was a French telecommunications engineer who, in 1938, invented and patented a method of transmitting color images via luma and chrominance so that they could be received on both color and black & white television sets. Rival colour television methods, which had been in development since the 1920s, were incompatible with monochrome televisions.
All current widely deployed colour television standards – NTSC, SÉCAM, PAL and today's digital standards – implement his idea of transmitting a signal composed of separate luminance and chrominance. Because his invention pre-dated the actual introduction of colour television by so long, his patent was exceptionally extended to 1971.
- FR patent 841335, Valensi, Georges, "Procédé de télévision en couleurs", published 1939-05-17, issued 1939-02-06
- US patent 2375966, Valensi, Georges, "System of television in colors", published 1945-05-15
- "Past and Present Senior Officials". International Telecommunication Union. hdl:11.1004/020.2000/s.048.