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Uploaded by on Mar 11, 2010

Internet television allows its users to choose the program or the TV show they want to watch from an archive of programs or from a channel directory. The two forms of viewing Internet television are streaming the content directly to a media player or simply downloading the program to the user's computer. With the "TV on Demand" market growing, these on demand websites or applications are a must have for major television broadcasters. For example the BBC's iPlayer brings in users which stream more than one million videos per week, with one of the BBC's headline shows "The Apprentice" taking over 3 - 5% of the UK's internet traffic due to people watching the first episode on iPlayer.

Every night the use of On Demand TV peaks at around 10 pm,[1] Most providers of the service provide several different formats and quality controls so that the service can be viewed on many different devices. Some services now offer a HD service along side their SD, streaming is the same but offers the quality of HD to the device being used, as long as it is using a HD screen. During Peak times the BBC's iPlayer transmits 12 GB (gigabytes) of information per second.[2] Over the course of a month the iPlayer sends 7 PB (petabytes) of information.

Before 2006, most Catch-up services used peer-to-peer (P2P) networking, in which users downloaded an application and data would be shared between the users rather than the service provider giving the now more commonly used streaming method. Now most service providers have moved away from the P2P systems and are now using the streaming media. This is good for the service provider as in the old P2P system the distribution costs were high and the servers normally couldn't handle the large amount of downloading and data transfer

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