Radios Golden Years: The Encyclopedia of Radio Programs, 1930-1960 A Thirty-Year History of Programs Carried on National Radio Networks in the United States, 1926-1956. Radio Drama: A Comprehensive Chronicle of American Network Programs, 1932-1962 Radio Program Openings and Closings, 1931-1972 Radio Programs, 1924-1984: A Catalog of over 1800 Shows Media Log: A Guide to Film, Television, and Radio Programs Supported by the National Endowment for the Humanities, Division of Pu Great Radio Audience Participation Shows: Seventeen Programs from the 1940s and 1950s Radio Program Ideabook. Greater than the bomb : the first publication in English of a radio program broadcast internationally in 1950 and repeated many times since

Televisão

Origem: Wikipedia, a enciclopédia livre.

Televisão é um sistema de transmissão e recepção de imagens e sons à distância. O termo se refere a todos aspectos de programas de televisão. Um primeiro sistema semi-mecânico televisão analógica foi demonstrado em fevereiro de 1924 por John Logie Bard e imagens móveis por Baiard em outubro de 30de 1925 Um sistema eletrônico completo foi demonstrado por Philo Taylor Fansworth no outono de 1927. O primeiro serviço analógico foi WGY, Schenectady, New York inaugurado em 11 de maiode [[1928]. A primeira televisão era um rádio com um dispositivo de televisão acoplado feito com um tubo de neon com um disco mecânico giratório disco de Nipkonque produzia uma grande imagem de um selo postal vermelho. O primeiro serviço de alta definição foi na Alemanha em [[março de [[1935], e visto em apenas 22 salas de cinema. Uma das primeiras grandes redes envolveu os jogos olímpicos de Berlim em 1936. A televisão foi usada em foguetes espaciais depois da 2ª Guerra Mundial como avanço tecnológico e captadora de renda adicional disponível.

The earliest television sets were radios with the addition of a television device consisting of a neon tube with a mechanically spinning disk (Nipkow disk) that produced a red postage-stamp size image. The first electronic high definition service was in Germany in March 1935, but was only available in 22 public viewing rooms. One of the first major broadcasts involved the 1936 Berlin Olympics. Television usage skyrocketed after World War II with war-related technological advances and additional disposable income. (1930s TV receivers cost the equivalent of $7000 today (2001) and had little available programming.) Color television became available in 1953, backed by the CBS network. The government approved the color broadcast system proposed by CBS, but when RCA came up with a system that did not require changes to the old black and white TV sets, CBS dropped their own proposal and used the new one. Television in its original and still most popular form involves sending moving images and sound over radio waves, which are received by a receiver (a television). In this sense, it is an extension of radio.

Starting in the 2000s, modern television sets diverged into three different trends:

• standalone TV sets;
• integrated systems with DVD players and/or VHS VCR built into the TV set itself (mostly for small size TV with up to 17" screen, the main idea is to have a complete portable system);
• component systems with separate big screen video monitor, tuner, audio system which the owner connects the pieces together as a high-end home theater system. This approach appeals to videophiles who prefer components which can be upgraded separately.

There are many kinds of video monitors used in modern TV sets. The most common are CRTs for up to 40"(?) diagonally. Most big screen TVs (upto over 100") use projection technology. Three types of projection systems are used in projection TVs: CRT based, LCD based and reflective imaging chip based. Modern advances brought flat screens to TV that use active matrix LCD or plasma display technology. Flat panel big screen TVs are only 4" thick and can be hung on the wall like a picture. They are extremely attractive and space-saving but they remain extremely expensive.

There are various kinds of television broadcast systems:

• Terrestial television
  • NTSC, PAL, PAL2, SECAM? analog signaling
• Satellite television using standard digital signaling
• Cable television
  • both analog and digital systems are available.
• New developments: Digital television(DTV) -- High Definition TV (HDTV) -- Pay-per-view -- Web tv -- programming on-demand.

Programming is broadcast on television stations (sometimes called channels) that are often targeted towards a certain audience. There are many news, sports and film stations and stations such as the MTV and BBC networks are seen throughout many countries.

In the US, TV networks produce prime-time programs for their affiliate stations to air between 7pm and 10pm. Most stations have their own programming off the prime time.

See also: Television programs, Animation and Animated series, Television personalities

• Band: see Television/Band

pt:Televisão

Radios Golden Years: The Encyclopedia of Radio Programs, 1930-1960		A Thirty-Year History of Programs Carried on National Radio Networks in the United States, 1926-1956.		Radio Drama: A Comprehensive Chronicle of American Network Programs, 1932-1962		Radio Program Openings and Closings, 1931-1972
Radio Programs, 1924-1984: A Catalog of over 1800 Shows		Media Log: A Guide to Film, Television, and Radio Programs Supported by the National Endowment for the Humanities, Division of Pu		Great Radio Audience Participation Shows: Seventeen Programs from the 1940s and 1950s		Radio Program Ideabook.
Greater than the bomb : the first publication in English of a radio program broadcast internationally in 1950 and repeated many times since