04-10-2014, 01:06 PM
Abstracts: DTH is a new technology and it has matured to its full potential in other parts of the world. There are many application has been found everyday for exploitation of benefits of DTH? The word ‘DTH’ is synonymous with transmission of digital video channel t o 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 usingan open standard Digital Video Broadcasting (DVB) technology. The video channels are received with a suitable set top box. Capable of demodulating Motion Picture Engineering Group (MPEG-2) standard videos. It is for the returnchannel required for other services such as voice over internet protocol and broadband access data communications, that a return channel is also required forthe 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 Mb psare possible using low cost user terminals. The forward ink is usually at 40 Mbps.Today, most satellite TV customers in developed television markets get their programming through a direct broadcast satellite (DBS) provider, such as DISH TVor DTH platform. The provider selects programs and broadcasts them to subscribers as a set package . Basically, the provider’s goal is to bring dozens or even hundreds of channels to the customer’s television in a form that approximates the competition from Cable TV. Unlike earlier programming, the provider’s broadcast is completely digital, which means it has high picture and stereo sound quality. Early satellite television was broadcast in C-band - radio in the 3.4-gigahertz (GHz) to 7-GHz frequency range. Digital broadcast satellite transmits programming in the Ku frequency range (10 GHz to 14 GHz). There are five major components involved in a direct to home (DTH) satellite.