generate questions: In December 2009 the United Kingdom became the first European country to deploy high definition content using the new DVB-T2 transmission standard, as specified in the Digital TV Group (DTG) D-book, on digital terrestrial television.
Which European country first deployed HD content using the new DVB-T2 standard? {sep_token} When did the UK deploy HD content using the new DVB-T2 transmission standard? {sep_token} What transmission standard did the UK start using in December 2009? {sep_token} What does DTG stand for? {sep_token}