Advanced Audio Coding

E236174

audio coding format digital audio codec lossy audio compression format

Advanced Audio Coding is a lossy digital audio compression format designed to provide better sound quality than MP3 at similar or lower bitrates and widely used in streaming, broadcasting, and multimedia applications.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (7)

Label	Occurrences
Advanced Audio Coding canonical	3
AAC-LC	2
MPEG-4 AAC	2
MPEG-2 Advanced Audio Coding	1
MPEG-4 AAC tools	1
MPEG-4 Audio	1
MPEG-4 audio coding	1

How this entity was disambiguated

This entity first appeared as the object of triple T2125213 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Advanced Audio Coding
Context triple: [AAC, fullName, Advanced Audio Coding]

A. G.722
G.722 is a wideband audio codec standard that provides higher-quality voice transmission than traditional narrowband codecs, commonly used in VoIP and teleconferencing applications.
B. ALAC
ALAC is the At-Large Advisory Committee within ICANN that represents the interests of individual Internet users in global domain name policy development.
C. aptX
aptX is an audio codec designed to deliver higher-quality, low-latency wireless sound, commonly used over Bluetooth connections for music and media streaming.
D. G.729
G.729 is a widely used ITU-T audio codec standard that compresses voice for bandwidth-efficient transmission in VoIP and other telephony applications.
E. Dolby Digital
Dolby Digital is a multichannel digital audio encoding system widely used in cinema, home theater, and broadcast to deliver surround sound.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Advanced Audio Coding
Target entity description: Advanced Audio Coding is a lossy digital audio compression format designed to provide better sound quality than MP3 at similar or lower bitrates and widely used in streaming, broadcasting, and multimedia applications.

A. G.722
G.722 is a wideband audio codec standard that provides higher-quality voice transmission than traditional narrowband codecs, commonly used in VoIP and teleconferencing applications.
B. ALAC
ALAC is the At-Large Advisory Committee within ICANN that represents the interests of individual Internet users in global domain name policy development.
C. aptX
aptX is an audio codec designed to deliver higher-quality, low-latency wireless sound, commonly used over Bluetooth connections for music and media streaming.
D. G.729
G.729 is a widely used ITU-T audio codec standard that compresses voice for bandwidth-efficient transmission in VoIP and other telephony applications.
E. Dolby Digital
Dolby Digital is a multichannel digital audio encoding system widely used in cinema, home theater, and broadcast to deliver surround sound.
F. None of above. chosen

Statements (72)

Predicate	Object
instanceOf	audio coding format ⓘ digital audio codec ⓘ lossy audio compression format ⓘ
abbreviation	AAC ⓘ
commonlyUsedFor	audio tracks in video files ⓘ broadcast audio ⓘ music streaming ⓘ
competesWith	MP3 ⓘ linked to: MPEG-1 Audio Layer III Opus ⓘ Vorbis ⓘ WMA ⓘ
compressionType	lossy ⓘ
containerFormat	ADIF ⓘ ADTS ⓘ MPEG-4 Part 14 ⓘ linked to: MPEG-4 container format
definedInStandard	ISO/IEC 13818-7 ⓘ ISO/IEC 14496-3 ⓘ
designedToProvide	better sound quality than MP3 at similar or lower bitrates ⓘ
developedBy	AT&T Bell Laboratories ⓘ linked to: Bell Telephone Laboratories Dolby Laboratories ⓘ Fraunhofer IIS ⓘ linked to: Fraunhofer Institute for Integrated Circuits IIS Sony Corporation ⓘ linked to: Sony
feature	MDCT-based transform coding ⓘ intensity stereo coding ⓘ mid/side stereo coding ⓘ parametric stereo in HE-AAC v2 ⓘ perceptual audio coding ⓘ perceptual noise substitution ⓘ spectral band replication in HE-AAC ⓘ temporal noise shaping ⓘ
fileExtension	.aac ⓘ .m4a ⓘ .mp4 ⓘ
hasProfile	AAC-ELD ⓘ linked to: AAC AAC-LC ⓘ linked to: Advanced Audio Coding AAC-LD ⓘ ER-AAC ⓘ ER-AAC ELD ⓘ HE-AAC ⓘ HE-AAC v2 ⓘ
licenseType	patent-encumbered ⓘ
optimizedFor	better quality at low and medium bitrates compared to MP3 ⓘ
partOfStandard	MPEG-2 ⓘ MPEG-4 ⓘ
patentPoolManagedBy	Via Licensing (historically) ⓘ
predecessor	MP3 ⓘ linked to: MPEG-1 Audio Layer III
standardizedBy	ISO/IEC ⓘ MPEG ⓘ
successorTo	MPEG-1 Layer III ⓘ linked to: MPEG-1 Audio Layer III
supports	low-latency modes such as AAC-LD ⓘ mono audio ⓘ multichannel audio ⓘ sample rates from 8 kHz to 96 kHz ⓘ stereo audio ⓘ up to 48 audio channels in MPEG-4 AAC ⓘ
typicalBitrateRange	from about 16 kbit/s to over 320 kbit/s ⓘ
usedIn	Apple iTunes Store ⓘ linked to: iTunes Store Blu-ray Disc ⓘ linked to: Blu-ray Disc format DAB+ digital radio ⓘ DVB digital television standards ⓘ linked to: DVB broadcasting standards YouTube ⓘ digital broadcasting ⓘ digital television ⓘ game consoles ⓘ internet radio ⓘ mobile devices ⓘ portable media players ⓘ smartphones ⓘ streaming media ⓘ tablets ⓘ video streaming services ⓘ
yearIntroduced	1997 ⓘ

How these facts were elicited