Digital Video Broadcasting-Satellite to Handheld Services

Universal education is the dream of India and more so with the passing of 'Right to Education bill' in the country. Looking to the diverse culture and vividity in the country it is not possible to take education to the last mile in the country with prevailing chalk-blackboard technique. An attempt has been made to probe various digital video broadcast (DVB) techniques for spatial and temporal distribution of contents as per stake holder needs Concept of time, space, energy and beam angle varying strategy has been explored. It is found that this technique would be very effective for remote and hilly areas with scanty population in India. This solution comes out from existing transmissions techniques which will be best one for long life, Reliable anywhere & at any time. DVB-SH is the name of a mobile broadcast standard designed to deliver video, audio and data services to small handheld devices such as mobile telephones, and to vehiclemounted devices. DVB-SH system provides an efficient and flexible mean of carrying broadcast services over a hybrid satellite and terrestrial infrastructure operating at frequencies below 3 GHz to a variety of portable, mobile and fixed terminals having compact antennas with very limited or no directivity. Target terminals include handheld defined as light-weight and batterypowered apparatus (e.g. PDAs, mobile phones), vehicle-mounted, nomadic (e.g. laptops, palmtops...) and stationary terminals. The DVB-SH system coverage is obtained by combining a Satellite Component (SC) and, where necessary, a Complementary Ground Component (CGC) to ensure service continuity in areas where the satellite alone cannot provide the required Q.O.S.