HE-AAC v2
E236178
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.
All labels observed (7)
| Label | Occurrences |
|---|---|
| HE-AAC | 2 |
| HE-AAC v2 canonical | 2 |
| HE-AAC (High Efficiency Advanced Audio Coding) | 1 |
| High Efficiency AAC | 1 |
| High Efficiency Advanced Audio Coding v2 | 1 |
| MPEG-4 HE-AAC v2 | 1 |
| MPEG-4 High Efficiency AAC | 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+ v2
ⓘ
linked to:
AAC
Enhanced AAC+ ⓘ High Efficiency Advanced Audio Coding v2 ⓘ
linked to:
HE-AAC 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
ⓘ
linked to:
HE-AAC v2
|
| goal | high perceived audio quality at low bitrates ⓘ |
| improves | coding efficiency at low bitrates ⓘ |
| mediaType | audio ⓘ |
| optimizedFor | very low bitrates ⓘ |
| partOf |
MPEG-4 Audio
ⓘ
linked to:
Advanced Audio Coding
|
| predecessor |
HE-AAC
ⓘ
linked to:
HE-AAC v2
|
| 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
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: HE-AAC v2 Description of subject: 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.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: HE-AAC v2
linked to: HE-AAC v2
linked to: HE-AAC v2
linked to: HE-AAC v2
linked to: HE-AAC v2
linked to: HE-AAC v2