   sistema brasileiro de televisÃ£o (sbt, ), brazilian television system) is a brazilian television network. it first aired in 1981, and its headquarters are based in osasco at the cdt anhanguera complex. ==history== ===before sbt=== rede tupi, channel 4 in sÃ£o paulo, began operations in 1950. in 1962 (when he began his first tv program), silvio santos produced his own programs on tupi, tv paulista and on rede globo beginning in 1965. soon, he owned his own tv station. his production company, estudios silvio santos cinema e televisao, was successful on tupi, globo and (since 1972) on rede record (where he then owned half of the company's stock). in 1976, with help from humourist and friend manoel de nÃ³brega (who had a show on rede globo and was part of bau de felicidade), santos obtained a license for his own station: rio de janeiro's channel 11, known as "tv studios" or "tvs". soon after its launch, its flagship program (programa silvio santos on sundays) began to be broadcast (santos left globo the same year). other programs soon began, as the network gained support from city residents who sought an alternative to globo, tupi, bandeirantes and tv rio (the city's network, related to tv record along with tvs). the new channel debuted on may 14, 1976, with a logo of a gold circle with the number 11 slanted in gold. when rede tupi went out of business in 1980, santos obtained three stations from the network: sÃ£o paulo's channel 4, porto alegre's channel 5 and belÃ©m's channel 5. sbt was created, launching on august 19, 1981 but using the tvs name until 1990. until the formation of sbt, the silvio santos group also had a station named tvs in nova friburgo. in 1978, minas gerais's tv alterosa became one of sbt's broadcast-affiliate networ
1981_establishments_in_Brazil Brazilian_television_networks Companies_established_in_1981 Sistema_Brasileiro_de_TelevisAPSo Television_channels_and_stations_established_in_1981 Television_stations_in_Brazil