Editing Digital radio (section)

== Types ==
In [[digital broadcasting]] systems, the analog audio signal is [[digital audio|digitized]], [[Audio compression (data)|compressed]] using an [[audio coding format]] such as [[AAC+]] ([[MDCT]])<ref>{{cite book |last1=Britanak |first1=Vladimir |last2=Rao |first2=K. R. |title=Cosine-/Sine-Modulated Filter Banks: General Properties, Fast Algorithms and Integer Approximations |date=2017 |publisher=Springer |isbn=978-3-319-61080-1 |page=478 |url=https://books.google.com/books?id=cZ4vDwAAQBAJ&pg=PA478 |access-date=2019-10-24 |archive-date=2023-07-01 |archive-url=https://web.archive.org/web/20230701082239/https://books.google.com/books?id=cZ4vDwAAQBAJ&pg=PA478 |url-status=live }}</ref> or [[MPEG-1 Audio Layer II|MP2]], and transmitted using a [[digital modulation]] scheme. The aim is to increase the number of radio programs in a given spectrum, to improve the audio quality, to eliminate [[fading]] problems in mobile environments, to allow additional [[datacasting]] services, and to decrease the transmission power or the number of transmitters required to cover a region. However, analog radio (AM and FM) is still more popular and listening to radio over IP ([[Internet Protocol]]) is growing in popularity.

In 2012, four digital wireless radio systems are recognized by the [[International Telecommunication Union]]: the two European systems [[Digital Audio Broadcasting]] (DAB) and [[Digital Radio Mondiale]] (DRM), the Japanese [[ISDB-T]] and the [[in-band on-channel]] technique used in the US and [[Arab world]] and branded as [[HD Radio]]. - [[5G Broadcast]] is a joint digital terrestrial broadcasting platform for radio and television under development in the UHF band being tested in 20 countries (2025) for more than five years. 

An older definition, still used in communication engineering literature, is [[wireless]] [[digital transmission]] technologies, i.e. [[microwave]]  and [[radio communications|radio frequency communication]] standards where analog [[information]] signals as well as digital data are carried by a [[Digital signal (electronics)|digital signal]], by means of a digital modulation method. This definition includes broadcasting systems such as [[digital TV]] and digital radio broadcasting, but also [[#Two-way digital radio standards|two-way digital radio standards]] such as the second generation ([[2G]]) cell-phones and later, [[Dedicated short-range communications|short-range communication]] such as [[DECT|digital cordless phones]], [[wireless computer network]]s, digital micro-wave radio links, [[Deep Space Network|deep space communication systems]] such as communications to and from the two [[Voyager program|Voyager space probes]], etc.