The BBC has begun its Ultra High Definition (4k) closed trial of World Cup 2014 from DTT transmitters in London, Manchester and Glasgow.

BBC R&D has partnered with Arqiva for the trial that will also run over high-speed broadband.

In a blog post Phil Layton, head of Broadcast & Connected Systems, explained the UHD production will be received in the UK from an H.264/AVC contribution satellite feed. For Both DTT and IP the partners are using Main Profile HEVC to compress the video to distribution.

The trial will be Transmitted DTT from Crystal Palace (London), Winter Hill (Manchester) and Black Hill (Glasgow). It uses the same T2 modulation as the existing BBC HD multiplexes.

The stream will use the latest DVB-DASH profile IP and is geo-locked to the UK only.