词条 | BBC National DAB | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
释义 |
| name = BBC National DAB | area = United Kingdom | image = | airdate = 27 September 1995[1] | frequency = 12B (225.648 MHz) | owner = BBC | website = www.bbc.co.uk }}BBC National DAB is a digital audio broadcasting multiplex in the UK, for a number of radio stations which have UK wide coverage. The multiplex is owned and operated by the BBC and is transmitted from a number of transmitter sites across the country; it only carries BBC radio stations. As of the end of 2017, more than 97% of the UK's population are within reach of the multiplex following the completion of the switching on of a fourth set of new transmitters over the previous two years which had seen the reach increase from 93%.[2] Any further expansion of DAB radio is awaiting a decision by Government on any possible digital radio switchover. Stations carriedThe following channels are receivable on any digital-equipped DAB radio in the BBC National DAB coverage area: Full time services
Part time servicesThe BBC National DAB multiplex makes extensive use of dynamic ensemble reconfiguration to allow a number of part-time services to broadcast. While these additional services are on air the bit rates of (one or more of) BBC Radio 3, BBC Radio 4, BBC Radio 5 Live, and data services are reduced.
"Pop-up" servicesIn recent years, the BBC has begun experimenting with short-term "Pop-up" digital radio stations, each broadcasting for approximately 4 days at a time, covering music festivals and other special events. The first to broadcast was BBC Radio 5 Live Olympics Extra in 2012, then BBC Radio 2 Eurovision launched for the first time in 2014, and was joined by BBC Radio 2 Country, BBC Music Jazz in 2015 and BBC Radio 2 50s in April 2016. When these temporary stations are on air, there is normally a reduction in bit rate of their parent station (Radio 1, Radio 2 or Radio 3).
Station closuresBBC Asian Network was due to be axed in around 2011 after plans to close down the station were published. The BBC also planned to close 6 Music.[3] Since then both stations have been saved from closure - 6 Music was retained after listening figures increased and a campaign was set up on Facebook which had 180,000 supporters.[4] See also
References1. ^{{cite web|url=http://primetime.unrealitytv.co.uk/tv-september-through-the-years/|title=TV: September Through the Years|accessdate=2008-10-09|publisher=Unreality Primetime}} {{Navboxes|list1={{BBC Radio}}{{Media in the United Kingdom|radio}}2. ^[https://www.a516digital.com/2017/11/arqiva-confirms-bbc-dab-rollout.html Arqiva confirms BBC DAB rollout complete] 3. ^{{cite web|title=BBC 6 Music and Asian Network face axe in shake up|url=http://news.bbc.co.uk/1/hi/8544150.stm|publisher=BBC News|accessdate=2 March 2010}} 4. ^{{cite web|title=BBC Trust rejects 6 Music closure plan|url=https://www.bbc.co.uk/news/10507286|publisher=BBC News|accessdate=5 July 2010| archiveurl= https://web.archive.org/web/20100721102133/http://www.bbc.co.uk/news/10507286| archivedate= 21 July 2010 | deadurl= no}} }} 2 : BBC Radio|DAB ensemble |
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