CCIR System B (originally known as the "Gerber Standard"[1][2][3][4]) was the 625-line VHF analog broadcast television system which at its peak was adopted by more than one hundred countries, either with PAL or SECAM colour.[5] It is usually associated with CCIR System G for UHF broadcasts.
System B was the first internationally accepted 625-line broadcasting standard in the world. A first 625-line system with a 8 MHz channel bandwidth was proposed at the CCIR Conference in Stockholm in July 1948 (based on 1946-48 studies in the Soviet Union[6] by Mark Krivosheev[7][8][9][10][11][12][13]).[3] At a CCIR Geneva meeting in July 1950 Dr. Gerber (a Swiss engineer), proposed a modified 625-lines system with a 7 MHz channel bandwidth (based on work by Telefunken and Walter Bruch), with the support of Belgium, Denmark, Italy, Netherlands, Sweden, Switzerland.[6] Known as the "Gerber-norm", it was eventually approved along with four other broadcast standards on the next formal CCIR meeting in May 1951 in Geneva.[6][14]
In the 1960s, the capital of Mexico, Mexico City decided to replace System B with 525-line CCIR System M, despite the recommendations of Guillermo González regarding the technical advantages of System B.
It is mostly replaced across Western Europe, former Yugoslavia, parts of Asia and Africa by digital broadcasting.
- ^ "625-Line Television Broadcast Standards - UK Vintage Radio Repair and Restoration Discussion Forum".
- ^ "405 Alive - FAQ - 405-Line Television in History". www.bvws.org.uk.
- ^ a b "The CCIR, the standards and the TV sets' market in France (1948-1985)" (PDF).
- ^ Magnetic Recording Handbook. Springer Science & Business Media. December 6, 2012. ISBN 9789401094689 – via Google Books.
- ^ "Weltweite Fernsehsysteme (NTSC, PAL und SECAM)". www.paradiso-design.net. 2005. Retrieved 2023-03-06.[permanent dead link]
- ^ a b c "Piet's Home-built Television". Maximus R&D.
- ^ ""M.I. Krivosheev: Participation in the development of mass TV broadcasting" - an exhibition at Ostankino TV Center".
- ^ "Mark Iosifovich Krivosheev (1922-2018)".
- ^ On the beginning of broadcast in 625-lines 60 year s ago, 625 magazine (in Russian). Archived 2016-03-04 at the Wayback Machine
- ^ M.I. Krivocheev – an engineer's engineer, EBU's technical review.
- ^ In the vanguard of television broadcasting
- ^ Observer, Reflective (2021-12-23). "Where did 625-line TV come from?". Medium. Retrieved 2021-12-31.
- ^ "625-Line Television System Origins - UK Vintage Radio Repair and Restoration Discussion Forum". www.vintage-radio.net. Retrieved 2021-12-31.
- ^ "World map showing the different line standards for black and white television after the CCIR Plenary Conference in Stockholm in 1952. Source: Rindfleisch, Hans, 'Der gegenwärtige Ausbau des Fernsehrundfunks im In-und Ausland', Rundfunktechnische Mitteilungen, 3, 1959, p.220".