Internet Protocol television (IPTV) is the delivery of television content over Internet Protocol (IP) networks. This is in contrast to delivery through traditional terrestrial, satellite, and cable television formats. Unlike downloaded media, IPTV offers the ability to stream the source media continuously. As a result, a client media player can begin playing the content (such as a TV channel) almost immediately. This is known as streaming media.
IPTV is a digital television broadcasting retransmitted by IPTV operator, typically from satellite. Often (but not always) the IPTV operator's function performs the intenet service provider, providing its customers the option of viewing IP-TV.
IPTV can be distributed locally (within the network of a specific provider), and via the Internet. IPTV on the Internet is also called OTT (Over-The-Top) or Internet TV.