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DTH TV HAS CHANGED TV VIEW­ING IN UR­BAN IN­DIA. IT PRO­VIDES QUAL­ITY RE­CEP­TION AND SER­VICES SUCH AS IN­TER­AC­TIVE MUL­TI­ME­DIA.

Gadgets and Gizmos (India) - - CONTENTS - TEXT AND GRAPH­ICS BY SAN­TOSH KUSH­WAHA

Di­rect-to-home brings qual­ity tele­vi­sion pro­gram­ming right into your home via a satel­lite dish. How Things Works ex­plains how the whole process takes place.

In di­rect-to-home (DTH) tele­cast, TV chan­nels/pro­grammes are di­rectly dis­trib­uted via satel­lite to the sub­scribers’ homes with­out the con­tent go­ing through a ca­ble op­er­a­tor. The sig­nals are trans­mit­ted in Ku band (10.7 GHz to 18 GHz) and are re­ceived by the sub­scribers through a small dish an­tenna and a set-top box. The DTH sys­tem can also pro­vide many value-added ser­vices such as the In­ter­net, e-mail, data cast­ing, e-com­merce, and in­ter­ac­tive mul­ti­me­dia.

Satel­lite TV solves the prob­lems of range and dis­tor­tion by trans­mit­ting broad­cast sig­nals from satel­lites or­bit­ing the Earth. Since satel­lites are high in the sky, the larger line of sight can ac­com­mo­date a lot more cus­tomers. DTH trans­mits and re­ceives ra­dio sig­nals us­ing spe­cialised an­ten­nas called satel­lite dishes. The first movers in In­dia were Dish TV and Tata Sky, fol­lowed then by Sun, Big TV, Air­tel Dig­i­tal, Video­con, etc.

Pro­gram­ming sources are sim­ply the chan­nels that pro­vide pro­gram­ming for broad­cast. The provider (the DTH plat­form) doesn’t cre­ate orig­i­nal pro­gram­ming it­self; it pays other com­pa­nies (HBO, for ex­am­ple, or ESPN, Aaj Tak, Head­lines To­day etc.) for the right to broad­cast their con­tent via satel­lite. In this way, the provider is a kind of bro­ker be­tween the viewer and the ac­tual pro­gram­ming sources. 1 Pro­gram­ming source pro­vides con­tent for broad­cast. Satel­lite TV providers get pro­gram­ming from two ma­jor sources: in­ter­na­tional chan­nels and var­i­ous lo­cal chan­nels. Turn­around chan­nels usu­ally have a dis­tri­bu­tion cen­tre that beams their pro­gram­ming to a geo­sta­tion­ary satel­lite.

LO­CAL STA­TION

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