CCIR System I is an analogue broadcast television system. It was first used in the Republic of Ireland starting in December 1961 as the 625-line broadcasting standard to be used on VHF Band I and Band III, sharing Band III with 405-line System A signals radiated in the north and east[1] of the country. The Republic of Ireland has (slowly) extended its use of System I onto the UHF bands.
The UK started its own 625-line television service in 1964 also using System I, but on UHF only – the UK has never used VHF for 625-line television except for some cable relay distribution systems.
Since then, System I has been adopted for use by Hong Kong, Macau, the Falkland Islands, South Africa, Angola, Botswana, Lesotho, Namibia, Tanzania, Saint Helena, Pitcairn Islands.[2]
As of late 2012, analogue television is no longer transmitted in either the UK or the Republic of Ireland. South Africa is still broadcasting in System I, but plans to end the service in 2022.[needs update]
^"405 Lines in Ireland (1961 - 1983)". Irish TV - Over forty years of Irish TV History. 18 May 2007. Archived from the original on 18 May 2007. Retrieved 15 May 2023.
^Amadeus Trappe, Raffael (2005). "Weltweite Fernsehsysteme (NTSC, PAL und SECAM)". www.paradiso-design.net. Retrieved 5 June 2023.[permanent dead link]
CCIRSystemI is an analogue broadcast television system. It was first used in the Republic of Ireland starting in December 1961 as the 625-line broadcasting...
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and associated with CCIR analogue broadcast television systems B, D, G, H, I or K. The articles on analog broadcast television systems further describe frame...
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Engineering Society) Beaubien, William H.: A Report of FM Stereo at the CCIR Study Group X Conference in Bad Kreuznach, Germany JAES Volume 11 Issue 1...
UT1R, etc.). McCarthy described the origin of the abbreviation: In 1967 the CCIR adopted the names Coordinated Universal Time and Temps Universel Coordonné...
Inspection Checklist Archived October 11, 2010, at the Wayback Machine FCC "CCIR 493-4 HF Selcall Information Resource". HFLINK. 2010. Retrieved January 10...