06-04-2013, 04:23 PM
Internet Protocol-Television
Internet Protocol.ppt (Size: 3.26 MB / Downloads: 25)
ABOUT TV
Television (TV): specifies the medium of communication that operates through the transmission of information to the users as pictures and sounds for their interpretation &entertainment.
MODES OF TV TRANSMISSION
Historic view-TV transmission from towers,
distribution over a cable n/w or beamed directly
from Satellite (VSAT).
Modern view-TV, Telephone services & high
speed internet access will be delivered over
present broadband DSL Network on a single
connection.
Types Of Transmission
MULTICASTING- A multicast stream is sent to a multicast group internet address. When a user selects a live channel, a request to join the group of viewers associated with the relevant multicast address is sent from the set top box to the equipment in the local telephone exchange.
UNICASTING- A video-on-demand service is unique to each viewer & delivered as a unicast stream. It is sent to a single internet address in response to a request from the receiver.
Definition of IP-TV
IPTV essentially has two components:
Part 1: Internet Protocol (IP): specifies the format of packets and the addressing scheme. The protocol establishes a virtual connection between a destination and a source. IP allows you to address a package of information and drop it in the system, but there’s no direct link between you and the recipient.
Part 2: Television (TV): specifies the medium of communication that operates through the transmission of pictures and sounds. We all know TV, but here we are referring to the services that are offered for the TV, like linear and on-demand programming.