625 lines

625-line (or CCIR 625/50) is a late 1940s European analog standard-definition television resolution standard.

[1][2] It consists of a 625-line raster, with 576 lines carrying the visible image at 25 interlaced frames per second.

It was eventually adopted by countries using 50 Hz utility frequency as regular TV broadcasts resumed after World War II.

[5] At the CCIR Stockholm Conference in July 1948 a first 625-line system with an 8 MHz channel bandwidth was proposed by the Soviet Union, based on 1946-48 studies[3] by Mark Krivosheev.

The system was based on work by Telefunken and Walter Bruch, and was supported by Belgium, Denmark, Italy, Netherlands, Sweden and Switzerland.