Editing MPEG-4 Part 3 (section)

==Audio Profiles==
[[File:HE-AAC and HE-AAC v2.svg|300px|thumb|right|Hierarchical structure of AAC Profile, HE-AAC Profile and HE-AAC v2 Profile, and compatibility between them. The HE-AAC Profile decoder is fully capable of decoding any AAC Profile stream. Similarly the HE-AAC v2 decoder can handle all HE-AAC Profile streams as well as all AAC Profile streams. Based on the MPEG-4 Part 3 technical specification.<ref name="mpeg4audio-n7016" />]]
The MPEG-4 Audio standard defines several profiles. These profiles are based on the object types and each profile supports different list of object types. Each profile may also have several levels, which limit some parameters of the tools present in a profile. These parameters usually are the sampling rate and the number of audio channels decoded at the same time.

{| class="wikitable sortable" style="min-width:600px"
|+MPEG-4 Audio Profiles<ref name="fhg-mpeg4audio" /><ref name="mpeg4audio-n7016" />
|-
! width="20%" | Audio Profile
! width="50%" | Audio Object Types
! width="10%" | First public release date
|-
| AAC Profile
| AAC LC
| 2003
|-
| High Efficiency AAC Profile
| AAC LC, SBR
| 2003
|-
| HE-AAC v2 Profile
| AAC LC, SBR, PS
| 2006
|-
| Main Audio Profile
| AAC Main, AAC LC, AAC SSR, AAC LTP, AAC Scalable, TwinVQ, CELP, HVXC, TTSI, Main synthesis
| 1999
|-
| Scalable Audio Profile
| AAC LC, AAC LTP, AAC Scalable, TwinVQ, CELP, HVXC, TTSI
| 1999
|-
| Speech Audio Profile
| [[CELP]], [[HVXC]], TTSI
| 1999
|-
| Synthetic Audio Profile
| TTSI, Main synthesis
| 1999
|-
| High Quality Audio Profile
| AAC LC, AAC LTP, AAC Scalable, CELP, ER AAC LC, ER AAC LTP, ER AAC Scalable, ER CELP
| 2000
|-
| Low Delay Audio Profile
| CELP, HVXC, TTSI, ER AAC LD, ER CELP, ER HVXC
| 2000
|-
| Natural Audio Profile
| AAC Main, AAC LC, AAC SSR, AAC LTP, AAC Scalable, TwinVQ, CELP, HVXC, TTSI, ER AAC LC, ER AAC LTP, ER AAC Scalable, ER TwinVQ, ER BSAC, ER AAC LD, ER CELP, ER HVXC, ER HILN, ER Parametric
| 2000
|-
| Mobile Audio Internetworking Profile
| ER AAC LC, ER AAC Scalable, ER TwinVQ, ER BSAC, ER AAC LD
| 2000
|-
| HD-AAC Profile
| AAC LC, SLS<ref>{{citation|title=ISO/IEC 14496-3:2005/PDAM 10:200X HD-AAC profile, MPEG2008/N10188 |url=http://kikaku.itscj.ipsj.or.jp/sc29/open/29view/29n9813t.doc |format=DOC |author=ISO/IEC JTC1/SC29/WG11 |date=2008-10-17 |access-date=2009-10-19 |url-status=dead |archive-url=https://web.archive.org/web/20140512223049/http://kikaku.itscj.ipsj.or.jp/sc29/open/29view/29n9813t.doc |archive-date=2014-05-12 }}</ref>
| 2009<ref>{{cite web | title=ISO/IEC 14496-3:2009/Amd 1:2009 - HD-AAC profile and MPEG Surround signaling | url=http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=53944 | author=ISO | publisher=ISO | date=2009-09-11 | access-date=2009-10-15}}</ref>
|-
| ALS Simple Profile
| ALS
| 2010<ref name="saoc-doc" /><ref>{{cite web | title=ISO/IEC 14496-3:2009/Amd 2:2010 - ALS simple profile and transport of SAOC | url=http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=54838 | author=ISO | publisher=ISO | date=2009-10-08 | access-date=2009-10-15}}</ref>
|}