# High-Efficiency Advanced Audio Coding

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Audio codec

"EAAC" redirects here. For the airline, see [European Aviation Air Charter](/source/European_Aviation_Air_Charter).

Not to be confused with [MPEG-4 SLS](/source/MPEG-4_SLS), which is branded HD-AAC.

High-Efficiency Advanced Audio Coding Filename extensions MPEG/3GPP container .m4a, .mp4, .3gp Apple container .m4a, .m4b, .m4p, .m4r, .m4v ADTS stream (not raw, contains headers) .aac Internet media type audio/aac audio/aacp audio/3gpp audio/3gpp2 audio/mp4 Developed by ISO Type of format Audio compression format Contained by MPEG-4 Part 14, 3GP and 3G2, ISO base media file format, Audio Data Interchange Format (ADIF), Audio Data Transport Stream (ADTS) Extended from AAC Standard ISO/IEC 14496-3

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.[1]

Evolution from MPEG-2 AAC-LC (Low Complexity) Profile and MPEG-4 AAC-LC [Object Type](/source/MPEG-4_Part_3#MPEG-4_Audio_Object_Types) to HE-AAC v2 Profile[2]

**High-Efficiency Advanced Audio Coding** (**HE-AAC**) is an [audio coding format](/source/Audio_coding_format) for [lossy data compression](/source/Lossy_data_compression) of [digital audio](/source/Digital_audio) as part of the [MPEG-4](/source/MPEG-4) standards. It is an extension of Low Complexity [AAC](/source/Advanced_Audio_Coding) (AAC-LC) optimized for low-[bitrate](/source/Bitrate) applications such as [streaming audio](/source/Streaming_audio).

The usage profile HE-AAC v1 uses [spectral band replication](/source/Spectral_band_replication) (SBR) to enhance the [modified discrete cosine transform](/source/Modified_discrete_cosine_transform) (MDCT) compression efficiency in the [frequency domain](/source/Frequency_domain).[3] The usage profile HE-AAC v2 couples SBR with [Parametric Stereo](/source/Parametric_Stereo) (PS) to further enhance the compression efficiency of stereo signals.

HE-AAC is defined as an [MPEG-4 Audio](/source/MPEG-4_Audio) profile in [ISO](/source/International_Organization_for_Standardization)/[IEC](/source/International_Electrotechnical_Commission) 14496–3. HE-AAC is used in [digital radio](/source/Digital_radio) standards like [HD Radio](/source/HD_Radio),[4] [DAB+](/source/Digital_Audio_Broadcasting#DAB+) and [Digital Radio Mondiale](/source/Digital_Radio_Mondiale).

## History

The progenitor of HE-AAC was developed by [Coding Technologies](/source/Coding_Technologies) by combining MPEG-2 AAC-LC with a proprietary mechanism for [spectral band replication](/source/Spectral_band_replication) (SBR), to be used by [XM Radio](/source/XM_Radio) for their satellite radio service. Subsequently, Coding Technologies submitted their SBR mechanism to MPEG as a basis of what ultimately became HE-AAC.

HE-AAC v1 was standardized as a profile of MPEG-4 Audio in 2003 by [MPEG](/source/Moving_Picture_Experts_Group) and published as part of the ISO/IEC 14496-3:2001/Amd 1:2003[5] specification.

The HE-AAC v2 profile was standardized in 2006 as per ISO/IEC 14496-3:2005/Amd 2:2006.[1][6]

Parts of the HE-AAC specification had previously been standardized and published by various bodies in **3GPP TS 26.401** ,[7] **ETSI TS 126 401 V6.1.0** ,[8] **ISO/IEC 14496-3:2001/Amd.1:2003** and **ISO/IEC 14496-3:2001/Amd 2:2004**. [9]

At the time, Coding Technologies had already begun using the trade names **AAC+** and **aacPlus** for what is now known as HE-AAC v1, and **aacPlus v2** and **eAAC+** for what is now known as HE-AAC v2.

## Perceived quality

Testing indicates that material decoded from 64 kbit/s HE-AAC does not quite have similar audio quality to material decoded from MP3 at 128 kbit/s using high quality encoders.[10][11][12][13] The test, taking bitrate distribution and [RMSD](/source/RMSD) into account, is a tie between [mp3PRO](/source/Mp3PRO), HE-AAC and [Ogg Vorbis](/source/Ogg_Vorbis).

Further controlled testing by [3GPP](/source/3GPP) during their revision 6 specification process indicates that HE-AAC and HE-AAC v2 provide "Good" audio quality for music at low bit rates (e.g., 24 kbit/s).

In 2011, a public listening test[14] comparing the two best-rated HE-AAC encoders at the time to [Opus](/source/Opus_(audio_format)) and Ogg Vorbis indicated that Opus had statistically significant superiority at 64 kbit/s over all other contenders. Apple's implementation of HE-AAC was ranked second. Ogg Vorbis and Nero HE-AAC tied for third place.

[MPEG-2](/source/MPEG-2) and MPEG-4 AAC-LC decoders without SBR support will decode the AAC-LC part of the audio, resulting in audio output with only half the sampling frequency, thereby reducing the audio bandwidth. This usually results in the high-end, or [treble](/source/Treble_(sound)), portion of the audio signal missing from the audio product.

## Support

### Encoding

Orban Opticodec-PC Streaming and File Encoders were the first commercially available encoders supporting [AAC-LC](/source/AAC-LC)/HE-AAC back in 2003. They are now deprecated and replaced with StreamS Encoders from StreamS/Modulation Index with many more features, including support [xHE-AAC](/source/XHE-AAC)/[Unified Speech and Audio Coding](/source/Unified_Speech_and_Audio_Coding). They are now in use at some of the largest content providers, and are considered to be the standard of the industry for live encoding.

Sony supports HE-AAC encoding since SonicStage version 4.

iTunes 9 supports HE-AAC encoding and playback.[15][16]

[Nero](/source/Nero_AG) has released a free-of-charge command line HE-AAC encoder, [Nero AAC Codec](/source/Nero_AAC_Codec),[17] and also supports HE-AAC inside the Nero software suite.

Sorenson Media's Squeeze Compression Suite includes an HE-AACv1 encoder and is available for [macOS](/source/MacOS) as well as [Windows](/source/Microsoft_Windows).

The [3GPP](/source/3GPP) consortium released source code of a reference HE-AACv2 encoder that appears to offer competitive quality.[18]

[Winamp](/source/Winamp) Pro also supports ripping music to HE-AAC. Using a transcoding plugin for Winamp's media library, any file can be transcoded to HE-AAC.[19]

[XLD](http://tmkk.undo.jp/xld/index_e.html), a macOS audio encoding program, offers encoding from any of its supported formats to HE-AAC.

[Nokia PC Suite](/source/Nokia_PC_Suite) may encode audiofiles to eAAC+ format before transmitting them to mobile phone.

HE-AAC v1 and v2 encoders are provided by the [Fraunhofer FDK AAC](/source/Fraunhofer_FDK_AAC) library in [Android](/source/Android_(operating_system)) 4.1 and later versions.[20]

### Decoding

HE-AAC is supported in the [open source](/source/Open_source) FAAD/[FAAD2](/source/FAAD2) decoding library and all players incorporating it, such as [VLC media player](/source/VLC_media_player), [Winamp](/source/Winamp), [foobar2000](/source/Foobar2000), [Audacious Media Player](/source/Audacious_Media_Player) and [SonicStage](/source/SonicStage).

The [Nero AAC Codec](/source/Nero_AAC_Codec) supports decoding HE and HEv2 AAC.

HE-AAC is also used by [AOL Radio](/source/AOL_Radio) and [Pandora Radio](/source/Pandora_Radio) clients to deliver high-fidelity music at low bitrates.

iTunes 9.2 and iOS 4 include full decoding of HE-AAC v2 parametric stereo streams.

- iTunes 9 thru 9.1, iPhone OS 3.1 and Fall 2009 iPods have support for HE-AAC playback for version 1 with no parametric stereo.

- Older versions of Apple [iTunes](/source/ITunes), [iPod Touch](/source/IPod_Touch), and [iPhone](/source/IPhone) will play HE-AAC files at reduced fidelity because they ignore the spectral-band replication and parametric stereo information, instead playing them as though they were standard AAC-LC files without the high-frequency, or "treble," information that is only present in the SBR part of the signal.[21] These will report the track length as twice its actual length.[*[citation needed](https://en.wikipedia.org/wiki/Wikipedia:Citation_needed)*]

Dolby released Dolby Pulse decoders and encoders in September 2008. HE-AAC v2 is the core of Dolby Pulse so files and streams encoded in Dolby Pulse will playback on AAC, HE-AAC v1 and v2 decoders. Conversely files and streams encoded in AAC, HE-AAC v1 or v2 will playback on Dolby Pulse decoders.

Dolby Pulse provides the following additional capabilities beyond HE-AAC v2:

- Ability to intelligently generate and insert reversible loudness normalization and dynamic range metadata into the encoded file/stream; this metadata can then be used to optimize the playback experience based on application and/or device.

- Ability to insert custom metadata into the encoded file, and extract this metadata on playback

Dolby has additionally released a PC decoder as an SDK suitable for integration into PC applications requiring Dolby Pulse, HE-AAC or AAC playback capabilities.

HE-AAC v2 decoders are provided in all versions of Android.[20] Decoding is handled by [Fraunhofer FDK AAC](/source/Fraunhofer_FDK_AAC) since Android version 4.1.

### Clients

This list is incomplete; you can help by adding missing items. (September 2012)

Application Platform Description AIMP Windows A Winamp-like alternative music player[22] Adobe Flash Player Windows, macOS, ChromeOS, Linux Browser plug-in[23][24] Supports AAC+ from any RTMP source. Live streams wrapped in an ADTS container are not natively supported and have to be re-wrapped. (e.g. Icecast KH can serve streams in a .flv container, which is compatible with Flash.)[a] Amarok (software) Windows, Linux Open-source music player Audacious Media Player Windows, Linux Open-source music player Deadbeef Linux, Android Open-source music player Die Plattenkiste Windows Freeware internet radio application (in German) foobar2000 Windows Freeware music player fre:ac Windows, macOS, Linux Open-source audio converter FStream macOS, iOS Internet radio application GuguRadio iOS Internet radio application Internet Radio Player Android Internet radio player Internet Radio Box Archived 2012-08-25 at the Wayback Machine iOS Internet radio application iTunes Windows, macOS Freeware music player. Pre-installed on Mac computers JetAudio Windows, Android Shareware media player MediaHuman Audio Converter Windows, macOS Freeware audio converter (Supports conversion of MP3, AAC, AIFF, WAV etc.) MPlayer Windows, macOS and Linux Open-source media player Mpv (media player) Windows, macOS and Linux Open-source media player Rockbox Various portable media devices Alternate firmware for various portable media-players, such as Apple iPod and Creative Zen QuickTime X macOS Media player pre-installed on Mac OS X Snow Leopard or later RealPlayer Windows, macOS, Linux, Android Freemium media player (HE-AAC v2 will only play in mono.)[26] Rhythmbox Linux Open-source music player Snowtape macOS Shareware internet radio application streamWriter Windows Open-source internet radio application StreamS HiFi Radio iOS Paidware internet radio player Tunein radio iOS, Android, Windows Phone, Blackberry Internet radio player VLC media player Windows, macOS, Linux, iOS, Android Open-source media player Winamp Windows, macOS, Android Freeware media player XiiaLive Android, iOS Internet radio player Kodi Windows, Linux, macOS, Android Open-source media player Media Player Classic Windows Open-source media player

## Promotion aspects

### Commercial trademarks and labeling

HE-AAC is marketed under the trademark aacPlus by [Coding Technologies](/source/Coding_Technologies) and under the trademark Nero Digital by Nero AG. Sony Ericsson, Nokia and Samsung use AAC+ to label support for HE-AAC v1 and eAAC+ to label support for HE-AAC v2 on their phones. Motorola uses AAC+ to indicate HE-AAC v1 and "AAC+ Enhanced" to indicate HE-AAC v2.[*[citation needed](https://en.wikipedia.org/wiki/Wikipedia:Citation_needed)*]

### Licensing and patents

Companies holding patents for HE-AAC have formed a [patent pool](/source/Patent_pool) administered by Via Licensing Corporation[27] to provide a single point of license for product makers.

Patent licenses are required for end-product companies that make hardware or software products that include HE-AAC encoders and/or decoders.[28] Unlike the MP3 format before April 23, 2017,[29] content owners are not required to pay license fees to distribute content in HE-AAC.

## Standards

HE-AAC profile was first standardized in ISO/IEC 14496-3:2001/Amd 1:2003.[5] HE-AAC v2 profile (HE-AAC with Parametric Stereo) was first specified in ISO/IEC 14496-3:2005/Amd 2:2006.[1][6][30] The Parametric Stereo coding tool used by HE-AAC v2 was standardized in 2004 and published as ISO/IEC 14496-3:2001/Amd 2:2004.[9][7]

The current version of the MPEG-4 Audio (including HE-AAC standards) is published in ISO/IEC 14496-3:2009.

Enhanced aacPlus is required audio compression format in [3GPP](/source/3GPP) technical specifications for [3G](/source/3G) [UMTS](/source/UMTS) multimedia services and should be supported in [IP Multimedia Subsystem](/source/IP_Multimedia_Subsystem) (IMS), [Multimedia Messaging Service](/source/Multimedia_Messaging_Service) (MMS), [Multimedia Broadcast/Multicast Service](/source/Multimedia_Broadcast_Multicast_Service) (MBMS) and Transparent end-to-end Packet-switched Streaming Service (PSS).[31][32][33][34] HE-AAC version 2 was standardized under the name Enhanced aacPlus by [3GPP](/source/3GPP) for 3G UMTS multimedia services in September 2004 (3GPP TS 26.401).[35]

HE-AAC and HE-AAC v2 audio coding for [DVB](/source/Digital_Video_Broadcasting) applications is standardized by TS 101 154.[36][37] AacPlus v2 by Coding Technologies[38] is also standardized by the [ETSI](/source/European_Telecommunications_Standards_Institute) as TS 102 005 for Satellite services to Handheld devices (DVB-SH) below 3 GHz.

In December 2007, Brazil started broadcasting terrestrial DTV standard called International [ISDB-Tb](/source/ISDB-Tb) that implements video coding H.264 with audio AAC-LC on main program (single or multi) and video H.264 with audio HE-AACv2 in the 1Seg mobile sub-program.

### Versions

The following is the summary of the different versions of HE-AAC:

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 xHE-AAC aacPlus v2, eAAC+, AAC++, Enhanced AAC+ AAC-LC + SBR + PS + USAC ISO/IEC 23003-3:2012/Amd 2:2012 [39]

- **LC** means *[low complexity](/source/Advanced_Audio_Coding#Modular_encoding)*

- **SBR** means *[spectral band replication](/source/Spectral_band_replication)*

- **PS** means *[parametric stereo](/source/Parametric_stereo)*

- **USAC** means *[unified speech and audio coding](/source/Unified_speech_and_audio_coding)*

## See also

- [Advanced Audio Coding](/source/Advanced_Audio_Coding)

- [Digital Radio Mondiale](/source/Digital_Radio_Mondiale)

## Notes

1. **[^](#cite_ref-fn1_26-0)** To deliver streaming audio, AAC data is most likely carried in either the Audio Data Interchange Format (ADIF) or via Audio Data Transport Stream (ADTS). These containers can be parsed to create FLV audio tags in order to use the audio file with Data Generation Mode.[25]

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1. **[^](#cite_ref-27)** ["Orban Codec Products ~ Opticodec-PC 1020 Codec"](https://web.archive.org/web/20150318182830/http://www.orban.com/products/codec/software/opticodec-pc1020/codec/). Archived from [the original](http://www.orban.com/products/codec/software/opticodec-pc1020/codec/) on 2015-03-18. Retrieved 2014-10-19.

1. **[^](#cite_ref-28)** Via Licensing. ["Licensing Programs"](http://www.via-corp.com/us/en/licensing.html). [Archived](https://web.archive.org/web/20170513100143/http://www.via-corp.com/us/en/licensing.html) from the original on 2017-05-13. Retrieved 2017-05-11.

1. **[^](#cite_ref-29)** Via Licensing. ["AAC Licensing FAQ"](http://www.via-corp.com/us/en/licensing/aac/faq.html). [Archived](https://web.archive.org/web/20170522200114/http://www.via-corp.com/us/en/licensing/aac/faq.html) from the original on 2017-05-22. Retrieved 2017-05-11.

1. **[^](#cite_ref-30)** Thomson. ["Thomson/FhG MP3 Licensing"](https://web.archive.org/web/20170117091012/http://www.mp3licensing.com/royalty/). Archived from [the original](http://www.mp3licensing.com/royalty/) on 2017-01-17.

1. **[^](#cite_ref-embedded_31-0)** Mihir Mody (2005-06-06). ["Audio compression gets better and more complex"](https://web.archive.org/web/20241213060405/https://www.embedded.com/columns/specialreports/164300682?_requestid=60812). Embedded.com. Archived from [the original](http://www.embedded.com/columns/specialreports/164300682?_requestid=60812) on 2024-12-13. Retrieved 2009-10-13.

1. **[^](#cite_ref-32)** ETSI (2009-04) [ETSI TS 126 234 V8.2.0 (2009-04); 3GPP TS 26.234; Transparent end-to-end Packet-switched Streaming Service (PSS); Protocols and codecs](http://www.3gpp.org/ftp/Specs/html-info/26234.htm) [Archived](https://web.archive.org/web/20081201093237/http://www.3gpp.org/ftp/specs/html-info/26234.htm) 2008-12-01 at the [Wayback Machine](/source/Wayback_Machine) Page 58. Retrieved on 2009-06-02.

1. **[^](#cite_ref-33)** ETSI (2009-01) [ETSI TS 126 140 V8.0.0 (2009-01); 3GPP TS 26.140; Multimedia Messaging Service (MMS); Media formats and codes](http://www.3gpp.org/ftp/Specs/html-info/26140.htm) [Archived](https://web.archive.org/web/20081206062526/http://www.3gpp.org/ftp/Specs/html-info/26140.htm) 2008-12-06 at the [Wayback Machine](/source/Wayback_Machine) Page 11. Retrieved on 2009-06-02.

1. **[^](#cite_ref-34)** ETSI (2009-01) [ETSI TS 126 141 V8.0.0 (2009-01); 3GPP TS 26.141; IP Multimedia System (IMS) Messaging and Presence; Media formats and codecs](http://www.3gpp.org/ftp/Specs/html-info/26141.htm) [Archived](https://web.archive.org/web/20081007213730/http://www.3gpp.org/ftp/Specs/html-info/26141.htm) 2008-10-07 at the [Wayback Machine](/source/Wayback_Machine) Page 10. Retrieved on 2009-06-02.

1. **[^](#cite_ref-3gpp-26346_35-0)** [3GPP](/source/3GPP) (2009). ["ETSI TS 126 346 V8.3.0 (2009-06); 3GPP TS 26.346; Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs"](http://www.3gpp.org/ftp/Specs/html-info/26346.htm). [ETSI](/source/ETSI). p. 85. [Archived](https://web.archive.org/web/20081004163354/http://www.3gpp.org/FTP/Specs/html-info/26346.htm) from the original on 2008-10-04. Retrieved 2009-10-13.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: numeric names: authors list ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_numeric_names:_authors_list))

1. **[^](#cite_ref-3gpp-26401_36-0)** 3GPP (2004). ["3GPP TS 26.401 - General audio codec audio processing functions; Enhanced aacPlus general audio codec; General description"](http://www.3gpp.org/ftp/Specs/html-info/26401.htm). 3GPP. [Archived](https://web.archive.org/web/20081004163359/http://www.3gpp.org/FTP/Specs/html-info/26401.htm) from the original on 2008-10-04. Retrieved 2009-10-13.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: numeric names: authors list ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_numeric_names:_authors_list))

1. **[^](#cite_ref-37)** ETSI TS 101 154 v1.5.1: Specification for the use of Video and Audio Coding in Broadcasting Applications based on the [MPEG-2 Transport Stream](/source/MPEG_transport_stream)

1. **[^](#cite_ref-etsi-101-154_38-0)** ETSI (2009-03-31). ["TS 101 154 version 1.9.1 - Digital Video Broadcasting (DVB); Specification for the use of Video and Audio Coding in Broadcasting Applications based on the MPEG-2 Transport Stream"](http://webapp.etsi.org/workprogram/Report_WorkItem.asp?wki_id=30945). ETSI. Retrieved 2009-10-13.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: deprecated archival service ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_deprecated_archival_service))

1. **[^](#cite_ref-CT-whitepaper_39-0)** ["Archived copy"](https://web.archive.org/web/20061026031407/http://www.codingtechnologies.com/products/assets/CT_aacPlus_whitepaper.pdf) (PDF). Archived from [the original](http://www.codingtechnologies.com/products/assets/CT_aacPlus_whitepaper.pdf) (PDF) on 2006-10-26. Retrieved 2007-01-29.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: archived copy as title ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_archived_copy_as_title))

1. **[^](#cite_ref-40)** ["xHE-AAC"](https://www.iis.fraunhofer.de/en/ff/amm/broadcast-streaming/xheaac.html). *Fraunhofer Institute for Integrated Circuits IIS*. Retrieved 3 January 2021.

## External links

- [Stream.Media](https://web.archive.org/web/20150415072207/http://stream.media/) Radio Streaming Provider that provides every stream in HE-AACv2

- [MPEG-4 HE-AAC v2 — audio coding for today's digital media world](https://web.archive.org/web/20070316003615/http://www.ebu.ch/en/technical/trev/trev_305-moser.pdf), article in the [EBU](/source/EBU) technical review (01/2006) giving explanations on HE-AAC.

- [Tuner2.com](https://web.archive.org/web/20040827034854/http://www.tuner2.com/) list of Internet radio stations using aacPlus

- [RadioFeeds UK & Ireland (AAC+)](http://www.radiofeeds.co.uk/other.asp) UK terrestrial radio stations streaming online in aacPlus format

- [aacPlus explained](https://web.archive.org/web/20070220192638/http://www.codingtechnologies.com/products/aacPlus.htm)

- [Open Source AAC codec](https://www.audiocoding.com/) FAAC (encoder) and FAAD2 (decoder)

- [Reworked HE-AAC encoder](http://teknoraver.net/software/mp4tools/) aacplusenc (Windows binary aacplusenc.exe only goes to 51 kbit/s.)

- [SNG 1.3 Front-end](http://www.afreecodec.com/download/simple-neroaacenc-gui-sng-46445_win1.html) [Archived](https://web.archive.org/web/20120103111348/http://www.afreecodec.com/download/simple-neroaacenc-gui-sng-46445_win1.html) 2012-01-03 at the [Wayback Machine](/source/Wayback_Machine) for Nero Encoder e.g. AAC-LC, HE-AAC, HE-AACv2 e.g.(Van Halen's Panama HE-AAC maxed at 205 kbit/s)

- [neroAacEnc.exe](http://www.nero.com/eng/downloads-nerodigital-nero-aac-codec.php) - the Nero Encoder back-end for the SNG 1.3 front-end.

- [Winamp.com](http://www.winamp.com/) Audio player/ripper that allows you to rip CDs into HE-AAC and convert other audio files into HE-AAC (with a free add-on).

- [EZ CD Audio Converter](http://www.poikosoft.com/) CD Ripper, Audio Converter, and CD Burner that allows you to rip to AAC-LC and HE-AAC, convert to AAC-LC and HE-AAC and burn AAC-LC and HE-AAC to an Audio CD.

- [Die Plattenkiste](http://www.dieplattenkiste.de) Albumplayer, Ripper, Converter, and CD Burner that allows you to rip to AAC and aacPlus, convert to AAC and aacPlus and burn AAC and aacPlus to gapless Audio-CD.

- [mp3PRO vs MP3](https://www.pricenfees.com/digit-life-archives/mp3pro-vs-mp3) [Archived](https://web.archive.org/web/20170202062701/https://www.pricenfees.com/digit-life-archives/mp3pro-vs-mp3) 2017-02-02 at the [Wayback Machine](/source/Wayback_Machine) - includes graphs comparing high-frequency performance for MP3pro (similar to HE-AAC+)

- [Official MPEG web site](http://mpeg.chiariglione.org/)

- [Via Licensing Corporation](http://www.vialicensing.com/licensing/AAC_index.cfm) - HE-AAC Patent Pool

- [RFC](/source/RFC_(identifier)) [4281](https://www.rfc-editor.org/rfc/rfc4281) - The Codecs Parameter for "Bucket" Media Types

- [Fraunhofer AAC Test Site](https://www2.iis.fraunhofer.de/AAC)

v t e Multimedia compression and container formats Video compression ISO, IEC, MPEG DV MJPEG Motion JPEG 2000 MPEG-1 MPEG-2 Part 2 MPEG-4 Part 2 / ASP Part 10 / AVC Part 33 / IVC MPEG-H Part 2 / HEVC MPEG-I Part 3 / VVC MPEG-5 Part 1 / EVC Part 2 / LCEVC ITU-T, VCEG H.120 H.261 H.262 H.263 H.264 / AVC H.265 / HEVC H.266 / VVC H.267 / Enhanced Compression Model SMPTE VC-1 VC-2 VC-3 VC-5 VC-6 TrueMotion and AOMedia TrueMotion S VP3 VP6 VP7 VP8 VP9 AV1 AV2 Chinese Standard AVS1 P2/AVS+ (GB/T 20090.2/16) AVS2 P2 (GB/T 33475.2,GY/T 299.1) HDR Vivid (GY/T 358) AVS3 P2 (GY/T 368) Others Apple Video AVS Bink Cinepak Daala DVI FFV1 Huffyuv Indeo Lagarith Microsoft Video 1 MSU Lossless OMS Video Pixlet ProRes 422 4444 QuickTime Animation Graphics RealVideo RTVideo SheerVideo Smacker Sorenson Video/Spark Theora Thor Ut WMV XEB YULS Audio compression ISO, IEC, MPEG MPEG-1 Layer II Multichannel MPEG-1 Layer I MPEG-1 Layer III (MP3) AAC HE-AAC AAC-LD MPEG Surround MPEG-4 ALS MPEG-4 SLS MPEG-4 DST MPEG-4 HVXC MPEG-4 CELP MPEG-D USAC MPEG-H 3D Audio ITU-T G.711 A-law µ-law G.718 G.719 G.722 G.722.1 G.722.2 G.723 G.723.1 G.726 G.728 G.729 G.729.1 IETF Opus iLBC Speex Vorbis FLAC 3GPP AMR AMR-WB AMR-WB+ EVRC EVRC-B EVS GSM-HR GSM-FR GSM-EFR ETSI AC-3 AC-4 DTS Bluetooth SIG SBC LC3 Chinese Standard AVS1 P10 (GB/T 20090.10) AVS2 P3 (GB/T 33475.3) Audio Vivid (GY/T 363) DRA (GB/T 22726) ExAC (SJ/T 11299.4) Others ACELP ALAC Asao ATRAC CELT Codec 2 iSAC Lyra MELP Monkey's Audio MT9 Musepack OptimFROG OSQ QCELP RCELP RealAudio SD2 SHN SILK Siren SMV SVOPC TTA True Audio TwinVQ VMR-WB VSELP WavPack WMA MQA aptX aptX HD aptX Low Latency aptX Adaptive LDAC LHDC LLAC TrueHD Image compression IEC, ISO, IETF, W3C, ITU-T, JPEG CCITT Group 4 GIF HEIC / HEIF HEVC JBIG JBIG2 JPEG JPEG 2000 JPEG-LS JPEG XL JPEG XR JPEG XS JPEG XT PNG APNG TIFF TIFF/EP TIFF/IT Others AV1 AVIF BPG DjVu EXR FLIF ICER MNG PGF QOI QTVR WBMP WebP Containers ISO, IEC MPEG-ES MPEG-PES MPEG-PS MPEG-TS ISO/IEC base media file format MPEG-4 Part 14 (MP4) Motion JPEG 2000 MPEG-21 Part 9 MPEG media transport ITU-T H.222.0 T.802 IETF RTP Ogg Matroska SMPTE GXF MXF Others 3GP and 3G2 AMV ASF AIFF AVI AU BPG Bink Smacker BMP DivX Media Format EVO Flash Video HEIF IFF M2TS Matroska WebM QuickTime File Format RatDVD RealMedia RIFF WAV MOD and TOD VOB, IFO and BUP Collaborations NETVC MPEG LA Alliance for Open Media Methods Entropy Arithmetic Huffman Modified LPC ACELP CELP LSP WLPC Lossless Lossy LZ DEFLATE LZW PCM A-law µ-law ADPCM DPCM Transforms DCT FFT MDCT Wavelet Daubechies DWT Lists Comparison of audio coding formats Comparison of video codecs List of codecs See Compression methods for techniques and Compression software for codecs

v t e Analog and digital audio broadcasting Terrestrial Radio modulation AM FM COFDM Frequency allocations LW (LF) MW (MF) SW (HF) VHF (low / mid / high) L band (UHF) Digital systems CAM-D DAB/DAB+ DRM/DRM+ ISDB-Tsb FMeXtra HD Radio CDR DVB-T2 Lite Satellite Frequency allocations C band Ku band L band S band Digital systems ADR DAB-S DVB-SH S-DMB SDR Commercial radio providers SiriusXM Canada Codecs AAC AMR-WB+ HDC HE-AAC MPEG-1 Audio Layer II DRA+ Subcarrier signals AMSS DirectBand PAD RDS/RBDS SCA/SCMO DARC Related topics Technical (audio) Audio data compression Audio signal processing Technical (AM stereo formats) Belar C-QUAM Harris Kahn-Hazeltine Magnavox Technical (emission) AM broadcasting AM expanded band Cable radio Digital radio Error detection and correction FM broadcast band FM broadcasting FM extended band in Brazil Multipath propagation Shortwave relay station Cultural History of radio International broadcasting Radio portal Comparison of radio systems

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Adapted from the Wikipedia article [High-Efficiency Advanced Audio Coding](https://en.wikipedia.org/wiki/High-Efficiency_Advanced_Audio_Coding) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/High-Efficiency_Advanced_Audio_Coding?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.