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Chapter: Satellite Communication : Satellite Applications

Direct to home Broadcast (DTH): Block Diagram, Advantage

DTH stands for Direct-To-Home television. DTH is defined as the reception of satellite programmes with a personal dish in an individual home.

Direct to home Broadcast (DTH):

 

DTH stands for Direct-To-Home television. DTH is defined as the reception of satellite programmes with a personal dish in an individual home.

 

 DTH Broadcasting to home TV receivers take place in the ku band(12 GHz). This service is known as Direct To Home service.

 DTH services were first proposed in India in 1996.

 Finally in 2000, DTH was allowed.

 The new policy requires all operators to set up earth stations in India within 12 months of getting a license. DTH licenses in India will cost $2.14 million and will be valid for 10 years.

 

Working principal of DTH is the satellite communication. Broadcaster modulates the received signal and transmit it to the satellite in KU Band and from satellite one can receive signal by dish and set top box.

 

1. DTH Block Diagram:

 

 A DTH network consists of a broadcasting centre, satellites, encoders, multiplexers, modulators and DTH receivers

 The encoder converts the audio, video and data signals into the digital format and the multiplexer mixes these signals.

 

It is used to provide the DTH service in high populated area A Multi Switch is basically a box that contains signal splitters and A/B switches. A outputs of group of DTH LNBs are connected to the A and B inputs of the Multi Switch.

 


 

2. Advantage:

 

 DTH also offers digital quality signals which do not degrade the picture or sound quality.

 It also offers interactive channels and program guides with customers having the choice to block out programming which they consider undesirable

 One of the great advantages of the cable industry has been the ability to provide local channels, but this handicap has been overcome by many DTH providers using other local channels or local feeds.

 The other advantage of DTH is the availability of satellite broadcast in rural and semi-urban areas where cable is difficult to install.


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Satellite Communication : Satellite Applications : Direct to home Broadcast (DTH): Block Diagram, Advantage |


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