martes, 23 de octubre de 2007

Historia


La Historia

La televisión, Tv y popular tele, es un sistema de telecomunicación para la trasmisión y repetición de imágenes en movimientos y sonidos a distancia.
Esta transmisión puede ser efectuado mediante ondas de radio o por redes especializadas de televisión por cable. El receptor de las señales de televisión.
La palabra televisiones un híbrido de la voz griega "tele" (distancia) y al latín "visio" (vision). El termino televisión se refiere a todos los aspectos de transmisión y programación de la televisión. A veces se abrevia como TV. Este termino fue utilizado para la primera vez en 1990 por Constantin Perski en el congreso Internacional de electricidad de París.
El día mundial de la televisión se celebra el 21 de noviembre.

La Telefolografía.

Los primeros intentos de transmitir imágenes a distancia se realizan mediante la electricidad y sistemas mecánico.

El movimiento de la Imágen.

La imagen en movimiento es lo que se caracteriza a la televisión. los primeros desarrollos los realizaron los franceses Rionoux y Foiunies.
Pronto se sustituye los numerosos cables por un único par. Para ellos se utilizo un sistema de conmutación que viva poniendo cada célula en cada instante en contacto en cada lampara.

Televisión Mecánica, el disco de Nipkow y la rueda fónica.

En 1884 Paul Nipkow diseña y patenta el llamado disco de Nipkow, un proyecto de televisión que no podría llevarse a la practica. en 1910, el disco de Nipkow fue utilizado en el desarrollo de los sistemas de televisión de los inicios del siglo XX y en el 1925, el 25 de marzo, el inventor escoces.


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