High-Efficiency Advanced Audio Coding

eAAC+eAACHE-AACAAC+aacPluse-AACHigh-Efficiency AACAAC+ V2AACplus (AAC+)Advanced Audio Coding
High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496-3.wikipedia
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Digital audio broadcasting

DABDAB+digital radio
HE-AAC is used in digital radio standards like DAB+ and Digital Radio Mondiale.
In October 2005, the World DMB Forum instructed its Technical Committee to carry out the work needed to adopt the AAC+ audio codec and stronger error correction coding.

Opus (audio format)

OpusOpus audio format.opus
A 2011 Public Listening Test compared the two best-rated HE AAC encoders at that time to Opus and Ogg Vorbis, indicated statistically significant superiority at 64 kbit/s for Opus over all other contenders, and second ranked Apple HE AAC statistically superior to both Ogg Vorbis and Nero HE AAC which were tied for third place.
Opus replaces both Vorbis and Speex for new applications, and several blind listening tests have ranked it higher-quality than any other standard audio format at any given bitrate until transparency is reached, including MP3, AAC, and HE-AAC.

Spectral band replication

SBRMPEG-4 V3 SBR
HE-AAC version 1 profile (HE-AAC v1) uses spectral band replication (SBR) to enhance the compression efficiency in the frequency domain.
This codec was submitted to MPEG and formed the basis of MPEG-4 High-Efficiency AAC (HE-AAC), standardized in 2003.

Advanced Audio Coding

AACAAC/AAC+/eAAC+.aac
It is an extension of Low Complexity AAC (AAC LC) optimized for low-bitrate applications such as streaming audio.
The confusingly named AAC+ (HE-AAC) does so only at low bit rates and less so at high ones.

Coding Technologies

CT-aacPlus
The progenitor of HE-AAC was developed by Coding Technologies under the trade name CT-aacPlus.
The codec would become the MPEG-4 High-Efficiency AAC (HE-AAC) profile in 2003.

Vorbis

Ogg VorbisOGGaoTuV
The test, taking bitrate distribution and RMSD into account, is a tie between mp3PRO, HE AAC and Ogg Vorbis.
Low bitrate (less than 64 kbit/s): the most recent (2007) public multiformat test at 48 kbit/s showed that aoTuV Vorbis had a better quality than WMA and LC-AAC, the same quality as WMA Professional, and a lower quality than HE-AAC.

Digital radio

digitalDABdigital transmission
HE-AAC is used in digital radio standards like DAB+ and Digital Radio Mondiale.
WorldDMB announced in November 2006 that DAB would be adopting the HE-AACv2 audio coding format, also known as eAAC+.

Parametric Stereo

PSParametric Stereo (PS)
HE-AAC version 2 profile (HE-AAC v2) couples SBR with Parametric Stereo (PS) to enhance the compression efficiency of stereo signals.
Advanced Audio Coding Low Complexity (AAC LC) combined with Spectral Band Replication (SBR) and Parametric Stereo (PS) was defined as HE-AAC v2. An HE-AAC v1 decoder will only give mono sound when decoding an HE-AAC v2 bitstream.

Mp3PRO

very old software encoder/player
The test, taking bitrate distribution and RMSD into account, is a tie between mp3PRO, HE AAC and Ogg Vorbis.
It was included in their MPEG-2 AAC derived codec aacPlus, which would later be standardized as MPEG-4 HE-AAC.

FAAC

Freeware Advanced Audio Decoderlibfaac
HE-AAC is supported in the open source FAAD/FAAD2 decoding library and all players incorporating it, such as VLC media player, Winamp, foobar2000, Audacious Media Player, SonicStage and Die Plattenkiste.
The SBR and PS object types are not supported, so the HE-AAC and HE-AACv2 profiles are also not supported.

Flash Video

FLVFlash.flv
The most recent public releases of Flash Player (collaboration between Adobe Systems and MainConcept) also support H.264 video and HE-AAC audio.

SonicStage

SonicStage CPSony SonicStage
HE-AAC is supported in the open source FAAD/FAAD2 decoding library and all players incorporating it, such as VLC media player, Winamp, foobar2000, Audacious Media Player, SonicStage and Die Plattenkiste.
Adds the ability to import AACLC, as well as HE-AAC.

Unified Speech and Audio Coding

xHE-AAC
They are now deprecated and replaced with StreamS Encoders from StreamS/Modulation Index with many more features, including support xHE-AAC/Unified Speech and Audio Coding.
The MPEG-D USAC standard (ISO/IEC 23003-3) defines the xHE-AAC profile (Extended High Efficiency AAC), which contains all of the tools of the HE-AAC v2 profile plus the mono/stereo capabilities of the Baseline USAC profile.

RealPlayer

RealOne PlayerFormats supported by optional plug-insReal
Audio: MP3 (*.mp3, *.mp2, *.mp2, *.m3u), CD Audio (*.cda), WAV (*.wav), AAC/aacPlus v1 (*.aac, *.m4a, *.m4b, *.mp4, *.acp, *.m4p), Apple Lossless, AIFF (*.aif, *.aiff), AU Audio Files (*.au), Panasonic AAC (*.acp)

Adobe Flash Player

FlashFlash PlayerAdobe Flash
AAC (HE-AAC, AAC Main Profile, and AAC-LC)

3GP and 3G2

3GP.3gp3G2
The 3GP file format stores video streams as MPEG-4 Part 2, H.263, or MPEG-4 Part 10 (AVC/H.264), and audio streams as AMR-NB, AMR-WB, AMR-WB+, AAC-LC, HE-AAC v1 or Enhanced aacPlus (HE-AAC v2).

MPEG-4 Part 3

AACAAC+ISO/IEC 14496-3
High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496-3.
High-Efficiency Advanced Audio Coding is an extension of AAC LC using spectral band replication (SBR), and Parametric Stereo (PS).

Digital Video Broadcasting

DVBDigital Video BroadcastDVB Project
HE-AAC and HE-AAC v2 audio coding for DVB applications is standardized by TS 101 154.
The Norwegian implementation of DVB-T is different from most others, as it uses H.264 with HE-AAC audio encoding, while most other countries have adapted the less recent MPEG-2 standard.

Audio coding format

audio coding standardaudio compression formatAudio coding
High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496-3.

Lossy compression

lossylossy data compressioncompressed
High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496-3.

Digital audio

digital musicaudiodigital
High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496-3.

International Organization for Standardization

ISOInternational Organization for Standardization (ISO)ISO standard
High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496-3.

International Electrotechnical Commission

IECInternational Electrotechnical Commission (IEC)(IEC)
High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496-3.