http://www.theregister.co.uk/2011/05...twork_upgrade/
Quote:
Last year BT and other UK broadcasters were given the rights to a fair market price for re-broadcasting a number of BSkyB channels, and these were immediately added to BT Vision. But White says that sending over the internet without full quality of service protection as an adaptive stream would not have been good enough, so BT rented a TV channel on one of the UK DVB-T multiplexes which drive Freeview.
Now the telecommunications giant sees a way to get back the millions it costs to rent a channel and instead run the service over its own network. Such a public multicast service could lead to more channels being launched in that way, and White confirmed, "BT Wholesale will certainly resell the multicast capability."
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Should provide stronger competition to Virgin and Sky. With Multicast, only one copy of the content needs to be sent out, its duplicated by the routers if and when required. The best cable equivalent would be Switched Video.
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