Internet Protocol television (IPTV) is the process of transmitting and broadcasting television programs through the Internet using Internet Protocol (IP). IPTV gives dynamic features to the user to improve the user experience compared to a traditional television transmission such as radio frequency broadcast, satellite broadcast and/or cable television. A broadband connection is used as the medium of transmission for IPTV, which is very efficient compared to earlier transmission modes.
1. VOD: Video on demand (VOD) is an option available to the users of IPTV. Each user is given the option to choose from a catalog of videos and watch them as many times as required. This feature uses unicast transmission, whereas normal TV broadcasts use multicast transmission. Real Time Streaming Protocol is used for VOD
2. DVR: IPTV allows users to watch TV shows broadcast in the past using digital video recorder (DVR), which is also known as time shifted programming. Providers of IPTV allow users to watch recorded shows without DVR devices. There is a live DVR system at the provider’s end, making DVR more cost effective and efficient. Users can watch replays or start a TV program over from an interactive menu
3. Live Television: IPTV allows users to watch live transmissions with minimal latency. It provides live television broadcasts either with or without interactivity, without being just like traditional TV broadcasts. The protocol used for live television is Internet Group Management Protocol (IGMP) version 2
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