Internet Protocol television (IPTV) is a multimedia platform through which television services are delivered using the Internet protocol suite over a packet-switched network such as a LAN or the Internet, instead of being delivered through traditional terrestrial, satellite signal, and cable television formats. Unlike downloaded media, IPTV offers the ability to stream the media in smaller batches, directly from the source. As a result, a client media player can begin playing the data (such as a movie) before the entire file has been transmitted. This is known as streaming media.
IPTV services may be classified into three main classifications:
Live television, with or without interactivity related to the current TV show;
Time-shifted television: catch-up TV , start-over TV ;
Video on demand (VOD): browse a catalogue of videos, not related to TV programming.
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