Editing Digital Audio Broadcasting (section)

=== Creation of DAB+ ===
[[File:DAB+ Original Logo.svg|thumb|Old DAB+ logo]]The World DMB Forum (now [[WorldDAB]]) instructed its Technical Committee to work on an improved digital radio system. This work led to the creation of DAB+ in 2006. This new standard is based on DAB but uses newer [[MPEG-4]] compression instead of [[MPEG-2]], making it far more efficient and allowing more services to be broadcast without a loss in audio quality.<ref name=":5" /> 

The [[HE-AAC]] v2 audio codec<ref>{{Cite web |title=Press release |url=http://www.worlddab.org/news/document/143/WorldDMBPress_20Release_November.pdf |url-status=dead |archive-url=https://web.archive.org/web/20130627024235/http://www.worlddab.org/news/document/143/WorldDMBPress_20Release_November.pdf |archive-date=27 June 2013}}</ref> (also known as [[eAAC+]]) was adopted for DAB+. AAC+ uses a [[modified discrete cosine transform]] (MDCT) algorithm.<ref name="Herre">{{cite journal |last1=Herre |first1=J. |last2=Dietz |first2=M. |date=2008 |title=MPEG-4 high-efficiency AAC coding [Standards in a Nutshell] |journal=IEEE Signal Processing Magazine |volume=25 |issue=3 |pages=137–142 |bibcode=2008ISPM...25..137H |doi=10.1109/MSP.2008.918684}}</ref><ref name="Britanak">{{cite book |last1=Britanak |first1=Vladimir |url=https://books.google.com/books?id=cZ4vDwAAQBAJ&pg=PA478 |title=Cosine-/Sine-Modulated Filter Banks: General Properties, Fast Algorithms and Integer Approximations |last2=Rao |first2=K. R. |date=2017 |publisher=Springer |isbn=9783319610801 |page=478 |access-date=24 October 2019 |archive-url=https://web.archive.org/web/20230701082239/https://books.google.com/books?id=cZ4vDwAAQBAJ&pg=PA478 |archive-date=1 July 2023 |url-status=live}}</ref> It has also adopted the [[MPEG Surround]] audio format and stronger [[error correction coding]] in the form of [[Reed–Solomon error correction|Reed–Solomon]] coding. DAB+ has been standardised as [[European Telecommunications Standards Institute]] (ETSI) TS 102 563.

As DAB is not [[forward compatible]] with DAB+, older DAB receivers cannot receive DAB+ broadcasts. However, DAB receivers that were capable of receiving the new DAB+ standard after a [[firmware|firmware upgrade]] were being sold as early as July 2007. [[Malta]] was the first country to launch DAB+ broadcasts in Europe in October 2008<ref>{{Cite web |title=Current situation {{!}} History -Malta {{!}} Countries {{!}} WorldDAB |url=https://www.worlddab.org/countries/malta/history/current-situation?page=2 |access-date=2025-03-04 |website=www.worlddab.org}}</ref> and DAB+ broadcasts have since been trialled or launched in more countries. If DAB+ stations launch in established DAB countries, they can transmit alongside existing DAB stations that use the older [[MPEG-1 Audio Layer II]] audio format, and most existing DAB stations are expected to continue broadcasting until the vast majority of receivers support DAB+.<ref>[http://www.worlddab.org/upload/uploaddocs/WorldDMBPress%20Release_November.pdf Press release: New High Efficiency Audio Option Added for DAB Digital Radio], worlddab.org {{webarchive|url=https://web.archive.org/web/20080308204329/http://www.worlddab.org/upload/uploaddocs/WorldDMBPress%20Release_November.pdf|date=8 March 2008}}</ref>