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Discrete cosine transform
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===MDCT audio standards=== {{Further|Modified discrete cosine transform}} ====General audio==== {| class="wikitable" |- ! Audio compression standard ! Year ! Common applications |- | [[Dolby Digital]] (AC-3)<ref name="Luo" /><ref name="Britanak2011" /> | 1991 | [[Film|Cinema]], [[digital cinema]], [[DVD]], [[Blu-ray]], [[streaming media]], [[video games]] |- | [[Adaptive Transform Acoustic Coding]] (ATRAC)<ref name="Luo"/> | 1992 | [[MiniDisc]] |- | [[MP3]]<ref name="Guckert"/><ref name="Stankovic"/> | 1993 | [[Digital audio]] distribution, [[MP3 players]], [[portable media players]], [[streaming media]] |- | [[Perceptual Audio Coder]] (PAC)<ref name="Luo"/> | 1996 | [[Digital audio radio service]] (DARS) |- | [[Advanced Audio Coding]] (AAC / [[MP4]] Audio)<ref name=brandenburg/><ref name="Luo"/> | 1997 | [[Digital audio]] distribution, [[portable media players]], [[streaming media]], [[game consoles]], [[mobile devices]], [[iOS]], [[iTunes]], [[Android (operating system)|Android]], [[BlackBerry]] |- | [[High-Efficiency Advanced Audio Coding]] (AAC+)<ref name="Herre" /><ref name="Britanak" />{{rp|page = [https://books.google.com/books?id=cZ4vDwAAQBAJ&pg=PA478 478]}} | 1997 | [[Digital radio]], [[digital audio broadcasting]] (DAB+),<ref name="Britanak" /> [[Digital Radio Mondiale]] (DRM) |- | [[Cook Codec]] | 1998 | [[RealAudio]] |- | [[Windows Media Audio]] (WMA)<ref name="Luo"/> | 1999 | [[Windows Media]] |- | [[Vorbis]]<ref name="vorbis-mdct" /><ref name="Luo" /> | 2000 | [[Digital audio]] distribution, [[radio station]]s, [[streaming media]], [[video game]]s, [[Spotify]], [[Wikipedia]] |- | [[High-Definition Coding]] (HDC)<ref name="Jones"/> | 2002 | Digital radio, [[HD Radio]] |- | [[Dynamic Resolution Adaptation]] (DRA)<ref name="Luo"/> | 2008 | China national audio standard, [[China Multimedia Mobile Broadcasting]], [[DVB-H]] |- | [[Opus (audio format)|Opus]]<ref name="Valin" /> | 2012 | VoIP,<ref name="homepage" /> mobile telephony, [[WhatsApp]],<ref name="Register" /><ref name="Hazra" /><ref name="Srivastava" /> [[PlayStation 4]]<ref name="PlayStation" /> |- | [[Dolby AC-4]]<ref name="Dolby AC-4" /> | rowspan="2" | 2015 | rowspan="2" | [[ATSC 3.0]], [[ultra-high-definition television]] (UHD TV) |- | [[MPEG-H 3D Audio]]<ref name="Bleidt" /> |} ====Speech coding==== {| class="wikitable" |- ![[Speech coding]] standard !! Year !Common applications |- |[[AAC-LD]] (LD-MDCT)<ref name="Schnell" /> |1999 |[[Mobile telephony]], [[voice-over-IP]] (VoIP), [[iOS]], [[FaceTime]]<ref name="AppleInsider standards 1"/> |- |[[Siren (codec)|Siren]]<ref name="Hersent" /> |1999 |[[VoIP]], [[wideband audio]], [[G.722.1]] |- |[[G.722.1]]<ref name="Lutzky" /> |1999 |VoIP, wideband audio, [[G.722]] |- |[[G.729.1]]<ref name="Nagireddi" /> |2006 |[[G.729]], VoIP, wideband audio,<ref name="Nagireddi" /> [[mobile telephony]] |- |[[Enhanced Variable Rate Codec B|EVRC-WB]]<ref name="Britanak"/>{{rp|page=[https://books.google.com/books?id=cZ4vDwAAQBAJ&pg=PA31 31], 478]}} |2007 |[[Wideband audio]] |- |[[G.718]]<ref name="ITU-T" /> |2008 |VoIP, wideband audio, mobile telephony |- |[[G.719]]<ref name="Britanak"/> |2008 |[[Teleconferencing]], [[videoconferencing]], [[voice mail]] |- |[[CELT]]<ref name="Terriberry" /> |2011 |VoIP,<ref name="ekiga" /><ref name="FreeSWITCH" /> mobile telephony |- |[[Enhanced Voice Services]] (EVS)<ref name="EVS" /> |2014 |Mobile telephony, VoIP, wideband audio |}
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