Editing High-Efficiency Advanced Audio Coding (section)

===Versions===
The following is the summary of the different versions of HE-AAC:
{|class="wikitable"
! Version
! Common trade names
! Codec feature
! Standards
|----
| HE-AAC v1
 | aacPlus v1, eAAC, AAC+, CT-aacPlus
 | AAC-LC + SBR
 | ISO/IEC 14496-3:2001/Amd 1:2003
|----
| HE-AAC v2
 | aacPlus v2, eAAC+, AAC++, Enhanced AAC+
 | AAC-LC + SBR + PS
 | ISO/IEC 14496-3:2005/Amd 2:2006
|----
| [[Unified Speech and Audio Coding|xHE-AAC]]
 | aacPlus v2, eAAC+, AAC++, Enhanced AAC+
 | AAC-LC + SBR + PS + [[Unified Speech and Audio Coding|USAC]]
 | ISO/IEC 23003-3:2012/Amd 2:2012<br><ref>{{cite web|url=https://www.iis.fraunhofer.de/en/ff/amm/broadcast-streaming/xheaac.html|title=xHE-AAC|website=Fraunhofer Institute for Integrated Circuits IIS|access-date=3 January 2021}}</ref>
|}

* '''LC''' means ''[[Advanced Audio Coding#Modular encoding|low complexity]]''
* '''SBR''' means ''[[spectral band replication]]''
* '''PS''' means ''[[parametric stereo]]''
* '''USAC''' means ''[[unified speech and audio coding]]''