HE-AAC v2

E236178

MPEG-4 audio profile audio codec profile audio compression format

HE-AAC v2 is an advanced audio codec profile that combines AAC with spectral band replication and parametric stereo to deliver high-quality sound at very low bitrates, commonly used in streaming and broadcasting.

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

All labels observed (4)

Label	Occurrences
HE-AAC	2
HE-AAC v2 canonical	1
High Efficiency AAC	1
High Efficiency Advanced Audio Coding v2	1

How this entity was disambiguated

This entity first appeared as the object of triple T2125252 — 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: HE-AAC v2
Context triple: [AAC, hasProfile, HE-AAC v2]

A. ALAC
ALAC is the At-Large Advisory Committee within ICANN that represents the interests of individual Internet users in global domain name policy development.
B. H.265
H.265, also known as High Efficiency Video Coding (HEVC), is a video compression standard designed to significantly reduce bandwidth and storage requirements compared to its predecessor H.264 while maintaining high visual quality.
C. Dolby TrueHD
Dolby TrueHD is a lossless multichannel audio codec designed for high-definition home entertainment formats like Blu-ray to deliver studio-quality surround sound.
D. 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.
E. 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.
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: HE-AAC v2
Target entity description: HE-AAC v2 is an advanced audio codec profile that combines AAC with spectral band replication and parametric stereo to deliver high-quality sound at very low bitrates, commonly used in streaming and broadcasting.

A. ALAC
ALAC is the At-Large Advisory Committee within ICANN that represents the interests of individual Internet users in global domain name policy development.
B. H.265
H.265, also known as High Efficiency Video Coding (HEVC), is a video compression standard designed to significantly reduce bandwidth and storage requirements compared to its predecessor H.264 while maintaining high visual quality.
C. Dolby TrueHD
Dolby TrueHD is a lossless multichannel audio codec designed for high-definition home entertainment formats like Blu-ray to deliver studio-quality surround sound.
D. 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.
E. 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.
F. None of above. chosen

Statements (44)

Predicate	Object
instanceOf	MPEG-4 audio profile ⓘ audio codec profile ⓘ audio compression format ⓘ
alsoKnownAs	AAC ⓘ surface form: AAC+ v2 Enhanced AAC+ ⓘ HE-AAC v2 ⓘ surface form: High Efficiency Advanced Audio Coding v2 eAAC+ ⓘ
audioChannels	mono ⓘ stereo ⓘ
basedOn	AAC ⓘ
category	audio coding format ⓘ
compatibleWith	AAC decoders without SBR and PS support at reduced quality ⓘ
componentTechnology	AAC LC core ⓘ SBR tool ⓘ parametric stereo tool ⓘ
compressionType	lossy audio compression ⓘ
definedInStandard	ISO/IEC 14496-3 ⓘ
designedFor	bandwidth-constrained networks ⓘ
extends	HE-AAC v2 self-linksurface differs ⓘ surface form: HE-AAC
goal	high perceived audio quality at low bitrates ⓘ
improves	coding efficiency at low bitrates ⓘ
mediaType	audio ⓘ
optimizedFor	very low bitrates ⓘ
partOf	Advanced Audio Coding ⓘ surface form: MPEG-4 Audio
predecessor	HE-AAC v2 self-linksurface differs ⓘ surface form: HE-AAC
qualityCharacteristic	better stereo imaging at low bitrates ⓘ improved high-frequency reconstruction via SBR ⓘ
standardizedBy	ISO/IEC ⓘ MPEG ⓘ
supports	broadcasting ⓘ streaming audio ⓘ
supportsSampleRates	8–48 kHz ⓘ
typicalBitrateRange	16–48 kbit/s for stereo ⓘ
typicalUseCase	music streaming at low bandwidth ⓘ voice and mixed-content streaming ⓘ
usedBy	broadcast infrastructure vendors ⓘ streaming media platforms ⓘ
usedIn	DAB+ radio ⓘ DVB broadcasting ⓘ digital broadcasting ⓘ internet radio ⓘ mobile streaming services ⓘ
usesTool	parametric stereo ⓘ spectral band replication ⓘ

How these facts were elicited

Referenced by (5)

Full triples — surface form annotated when it differs from this entity's canonical label.

AAC → hasProfile → HE-AAC v2 ⓘ

ISO/IEC 14496-3 → specifies → HE-AAC v2 ⓘ

this entity surface form: High Efficiency AAC

HE-AAC v2 → alsoKnownAs → HE-AAC v2 ⓘ

this entity surface form: High Efficiency Advanced Audio Coding v2

HE-AAC v2 → predecessor → HE-AAC v2 self-linksurface differs ⓘ

this entity surface form: HE-AAC

HE-AAC v2 → extends → HE-AAC v2 self-linksurface differs ⓘ