AAC
E46408
AAC (Advanced Audio Coding) is a widely used digital audio compression format known for delivering better sound quality than MP3 at similar bit rates and is commonly used in online music stores and streaming services.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T364611 — 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: AAC Context triple: [iTunes Store, fileFormat, AAC]
-
A.
ACA
ACA is a professional scientific organization that promotes the study and application of crystallography and structural science, primarily in North America.
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B.
CAC
The Central American Cup (CAC) is a regional football tournament featuring national teams from Central America competing for the championship title.
-
C.
ACE
ACE (Altamont Corridor Express) is a commuter rail service in California’s San Joaquin Valley and East Bay that provides weekday trains between Stockton and San Jose.
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D.
AA
AA is the two-letter IATA airline designator used to identify American Airlines in flight schedules, tickets, and aviation systems.
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E.
AA
AA was the common abbreviation for the German Foreign Office (Auswärtiges Amt) during the Nazi era.
- 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: AAC Target entity description: AAC (Advanced Audio Coding) is a widely used digital audio compression format known for delivering better sound quality than MP3 at similar bit rates and is commonly used in online music stores and streaming services.
-
A.
ACA
ACA is a professional scientific organization that promotes the study and application of crystallography and structural science, primarily in North America.
-
B.
CAC
The Central American Cup (CAC) is a regional football tournament featuring national teams from Central America competing for the championship title.
-
C.
ACE
ACE (Altamont Corridor Express) is a commuter rail service in California’s San Joaquin Valley and East Bay that provides weekday trains between Stockton and San Jose.
-
D.
AA
AA is the two-letter IATA airline designator used to identify American Airlines in flight schedules, tickets, and aviation systems.
-
E.
AA
AA was the common abbreviation for the German Foreign Office (Auswärtiges Amt) during the Nazi era.
- F. None of above. chosen
Statements (60)
| Predicate | Object |
|---|---|
| instanceOf |
audio coding format
ⓘ
lossy audio compression format ⓘ |
| audioCodingFamily |
MPEG
ⓘ
surface form:
MPEG audio coding
|
| channelSupport | up to 48 channels in MPEG-4 AAC ⓘ |
| compressionType | perceptual coding ⓘ |
| definedInStandard |
ISO/IEC 13818-7
ⓘ
ISO/IEC 14496-3 ⓘ |
| designedTo | provide better sound quality than MP3 at similar bit rates ⓘ |
| developedAsSuccessorTo |
MPEG
ⓘ
surface form:
MPEG-1 Layer III (MP3)
|
| fileExtension |
.3g2
ⓘ
.3gp ⓘ .aac ⓘ .m4a ⓘ .m4b ⓘ .m4p ⓘ .mp4 ⓘ |
| fullName | Advanced Audio Coding ⓘ |
| hasProfile |
AAC-ELD
ⓘ
Dolby Digital ⓘ
surface form:
AAC-LD
HE-AAC ⓘ HE-AAC v2 ⓘ LC-AAC ⓘ Main Profile ⓘ SSR Profile ⓘ |
| optimizedFor |
low bit rate applications
ⓘ
streaming over the internet ⓘ |
| predecessor | MP3 ⓘ |
| standardizedBy | MPEG ⓘ |
| standardizedIn |
MPEG
ⓘ
surface form:
MPEG-2
MPEG ⓘ
surface form:
MPEG-4
|
| supports |
mono audio
ⓘ
multichannel audio ⓘ sample rates from 8 kHz to 96 kHz ⓘ stereo audio ⓘ |
| supportsFeature |
intensity stereo coding
ⓘ
mid/side stereo coding ⓘ parametric stereo in HE-AAC v2 ⓘ perceptual noise substitution ⓘ spectral band replication in HE-AAC ⓘ temporal noise shaping ⓘ |
| typicalBitrateRange | 8 kbit/s to 512 kbit/s ⓘ |
| typicalContainerFormat |
3GP
ⓘ
ADTS ⓘ MP4 ⓘ |
| usedBy |
Android devices
ⓘ
Apple Music ⓘ iTunes Store ⓘ
surface form:
Apple iTunes Store
Nintendo consoles ⓘ PlayStation ⓘ
surface form:
PlayStation consoles
YouTube ⓘ iOS devices ⓘ |
| usedIn |
Blu-ray Disc format
ⓘ
surface form:
Blu-ray Discs
digital broadcasting ⓘ game consoles ⓘ mobile phones ⓘ music streaming services ⓘ online music stores ⓘ portable media players ⓘ set-top boxes ⓘ video streaming services ⓘ |
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: AAC Description of subject: AAC (Advanced Audio Coding) is a widely used digital audio compression format known for delivering better sound quality than MP3 at similar bit rates and is commonly used in online music stores and streaming services.
Referenced by (15)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
AAC-ELD
this entity surface form:
AAC+ v2