It differs from DAB (digital audio broadcasting) in that it uses MPEG4 as its codec, a more efficient compression technology than the MPG2 codec used by DAB.
Due to the size of the medium wave band, DRM could also offer addition services to compliment radio broadcasts, such as text information and images.
The BBC has been involved with the development of the technology and already uses it to broadcast the World Service on medium wave in West Europe and North Africa.
The year-long trial starts at the end of April and will be focused on the Plymouth area. The trial is a joint project with National Grid Wireless .
The BBC also announced it is expanding the range of DAB radio's coverage by building a further 10 new transmitters. They will be for the following regions: Glasgow and Gwent, Northumberland and Nottinghamshire, and Suffolk and the South Downs.