Ditect To Home (DTH) Digital Television Technology
DTH is no a new technology and it has matured to its full potential in other parts of the world. There are many applications been found everyday for exploitation of benefits of DTH?
The word ‘DTH’ is synonymous with transmission of digital video channel to home subscriber’s using a small dish antenna. The DTH utilizes a technology which enables a home to receive high speed internet broadband access data communication, voice over internet protocol (IP) telephony and much more using an open standard Digital Video Broadcasting (DVB) technology. The video channels are received with a suitable set top box. Capable of demodulating Motion Picture Engg. Group (MPEG-2) standard videos. It is for the return channel required for other services such as , voice over internet protocol and broadband access data communications , that a return channel is also required for the home terminal. The return channel via the satellite is called RCS and is an open standard.
Hardware compatible with DVB-RCS technology are readily available in the market in both Ku-band and C-band. DVB-RCS is an international open standard for multimedia satellite network where the return data rates in access of 2 Mbps are possible using low cost user terminals. The forward ink is usually at 40 Mbps.
What is DTH?
DTH stands for Direct-To-Home television. DTH is defined as the reception of satellite programs with a personal dish in an individual home.
DTH does away with the need for the local cable operator and puts the broadcaster directly in touch with the consumer. Only cable operators can receive satellite programs and they then distribute them to individual homes.
How does DTH work?
A DTH network consists of a broadcasting centre, satellites, encoders, multiplexers, modulators and DTH receivers. A DTH service provider has to lease Ku-band transponders from the satellite. The encoder converts the audio, video and data signals into the digital format and the multiplexer mixes these signals. At the user end, there will be a small dish antenna and set-top boxes to decode and view numerous channels. On the user’s end, receiving dishes can be as small as 45 cm in diametre.
DTH is an encrypted transmission that travels to the consumer directly through a satellite. DTH transmission is received directly by the consumer at his end through the small dish antenna. A set-top box, unlike the regular cable connection, decodes the encrypted transmission.
Download : Full Seminar report DTH (Ditect To Home)
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Communication Engineering, Seminar reports | Admin September 25, 2009