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.

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All labels observed (4)

Label Occurrences
HE-AAC 2
HE-AAC v2 canonical 1
High Efficiency AAC 1

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

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 (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
this entity surface form: HE-AAC