Television 121027231853-phpapp02


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Television 121027231853-phpapp02

  1. 1. Television 20108003 Lu Yanan
  2. 2. DefinitionTelevision (TV) is a telecommunication medium fortransmitting and receiving moving images that canbe monochrome (black-and-white) or colored, withor without accompanying sound. "Television" mayalso refer specifically to a television set, televisionprogramming, or television transmission.
  3. 3. closed-circuit television (CCTV) are in use,the most common usage of the medium is forbroadcast television, which was modeled onthe existing radio broadcasting systemsdeveloped in the 1920s, and uses high-powered radio-frequency transmitters tobroadcast the television signal to individualTV receivers.
  4. 4. HistoryThe first images transmitted electrically were sent by earlymechanical fax machines, including the pantelegraph, developedin the late nineteenth century. The concept of electricallypowered transmission of television images in motion was firstsketched in 1878 as the telephonoscope, shortly after theinvention of the telephone. At the time, it was imagined by earlyscience fiction authors, that someday that light could betransmitted over copper wires, as sounds were. Braun HF 1 television receiver, Germany, 1958→
  5. 5. Although television became more familiar in the United Stateswith the general public at the 1939 Worlds Fair, the outbreak ofWorld War II prevented it from being manufactured on a largescale until after the end of the war. True regular commercialtelevision network programming did not begin in the U.S. until1948. During that year, legendary conductor Arturo Toscaninimade his first of ten TV appearances conducting the NBCSymphony Orchestra,[26] and Texaco Star Theater, starringcomedian Milton Berle, became televisions first gigantic hitshow.[27] Since the 1950s, television has been the main mediumfor molding public opinion.[1]Amateur television (ham TV or ATV) was developed for non-commercial experimentation, pleasure and public service eventsby amateur radio operators. Ham TV stations were on the air inmany cities before commercial TV stations came on the air.[28]In 2012, it was reported that television was growing into a largercomponent of major media companies revenues than film.
  6. 6. Television Introduction By Country
  7. 7. China
  8. 8. China CCTVChina Central Television or Chinese Central Television,commonly abbreviated as CCTV, is the predominantstate television broadcaster in mainland China. CCTVhas a network of 22 channels broadcasting differentprogrammes and is accessible to more than one billionviewers.[1] Most of its programmes are a mixture ofdocumentary, comedy, entertainment, and drama, themajority of which consists of Chinese soap operas andentertainment
  9. 9. HistoryCCTV Peking (Beijing) Television ( 北 京 电 视 台 ) broadcast itsfirst program on 2 September 1958. Due to increasing demands,it soon launched its second channel in the 1960s and thirdchannel in the late of 1960s. Starting from 1 May 1973, PekingTelevision began broadcasting experimentally in colour on itssecond channel every Tuesday, Thursday, and Saturday usingthe PAL-D system, and fully converted to colour broadcasting by1977. The network changed its name to CCTV on 1 May 1978.Today, CCTV has 22 national channels, all of them airing 24hours a day.
  10. 10. Reference