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The 405-line monochrome analogue television broadcasting system was the first fully electronic television system to be used in regular broadcasting. It was introduced with the BBC Television Service in 1936, suspended for the duration of World War II, and remained in operation in the UK until 1985. It was also used between 1961 and 1982 in Ireland, as well as from 1957 to 1973 for the Rediffusion Television cable service in Hong Kong.

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  • 405-line television system
  • Sistema de televisión de 405 líneas
  • 405 lignes
  • 405 linee
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  • El Sistema de televisión de 405 líneas fue el primer sistema de televisión completamente electrónico utilizado en emisiones regulares y de uso mayoritariamente en el Reino Unido e Irlanda. En la actualidad, ha sido descontinuado.
  • The 405-line monochrome analogue television broadcasting system was the first fully electronic television system to be used in regular broadcasting. It was introduced with the BBC Television Service in 1936, suspended for the duration of World War II, and remained in operation in the UK until 1985. It was also used between 1961 and 1982 in Ireland, as well as from 1957 to 1973 for the Rediffusion Television cable service in Hong Kong.
  • Le 405 lignes est un standard de télévision qui fut officiellement adopté par la BBC en février 1937 à l'issue en 1936 du rapprochement entre les compagnies EMI et Marconi. Après la guerre de 1939-1945, alors que d'autres pays, tels la France ou l'Allemagne s'orientaient vers des définitions plus élevées, le 405 lignes britannique fut reconduit définitivement et ne fut abandonné qu'en 1983 après l'achèvement complet des nouveaux réseaux de BBC1 et ITV en UHF en couleurs PAL, initiés dès 1969. Peu gourmand en bande de fréquences, ce standard permit la diffusion de deux réseaux nationaux dans la bande VHF là où les autres pays, en ou en 819 lignes ne pouvaient en exploiter qu'un seul.La République d'Irlande adopta également ce standard pour le lancement de sa première chaîne, RTE (Radio Te
  • Il sistema di trasmissione televisiva analogica a 405 linee è stato il primo sistema utilizzato per trasmissioni regolari e non a carattere sperimentale. Fu introdotto dalla BBC nel 1936 e, sospeso durante la seconda guerra mondiale, rimase in uso nel Regno Unito fino al 1985. Fu utilizzato anche in Irlanda, Hong Kong e Nuova Zelanda. A volte chiamato sistema Marconi-EMI, fu inventato nel 1934 da Alan Dower Blumlein del centro ricerche EMI.
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