DefinitionTelevision (TV) is a telecommunication medium fortransmitting and receiving moving images that can bemonochrome (black-and-white) or colored, with orwithout accompanying sound. "Television" may alsorefer specifically to a television set, televisionprogramming, or television transmission
closed-circuit television (CCTV) are in use, the mostcommon usage of the medium is for broadcasttelevision, which was modeled on the existing radiobroadcasting systems developed in the 1920s, anduses high-powered radio-frequency transmitters tobroadcast the television signal to individual TVreceivers.
HistoryThe first images transmitted electrically weresent by early mechanical fax machines, includingthe pantelegraph, developed in the latenineteenth century. The concept of electricallypowered transmission of television images inmotion was first sketched in 1878 as thetelephonoscope, shortly after the invention of thetelephone. At the time, it was imagined by earlyscience fiction authors, that someday that lightcould be transmitted over copper wires, assounds were.←Braun HF 1 television receiver, Germany,1958
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, and Texaco Star Theater, starringcomedian Milton Berle, became televisions first gigantic hitshow. Since the 1950s, television has been the main mediumfor molding public opinion.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.In 2012, it was reported that television was growing into a largercomponent of major media companies revenues than film.
China CCTVChina Central Television or Chinese CentralTelevision, commonly abbreviated as CCTV, is thepredominant state television broadcaster in mainlandChina. CCTV has a network of 22 channelsbroadcasting different programmes and is accessibleto more than one billion viewers. Most of itsprogrammes are a mixture of documentary, comedy,entertainment, and drama, the majority of whichconsists of Chinese soap operas and entertainment
HistoryCCTV Peking (Beijing) Television ( 北 京 电 视 台 )broadcast its first program on 2 September 1958. Dueto increasing demands, it soon launched its secondchannel in the 1960s and third channel in the late of1960s. Starting from 1 May 1973, Peking Televisionbegan broadcasting experimentally in colour on itssecond channel every Tuesday, Thursday, andSaturday using the PAL-D system, and fully convertedto colour broadcasting by 1977. The network changedits name to CCTV on 1 May 1978.Today, CCTV has 22 national channels, all of themairing 24 hours a day.