MPEG-1 Layer II audio
E384761
MPEG-1 Layer II audio is a lossy audio compression format widely used in digital broadcasting and early digital media for efficient, good-quality stereo sound.
All labels observed (5)
| Label | Occurrences |
|---|---|
| MPEG-1 Audio Layer II | 1 |
| MPEG-1 Layer II | 1 |
| MPEG-1 Layer II audio canonical | 1 |
| MPEG-2 Audio Layer II | 1 |
| MPEG-2 Layer II audio | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3727875 — 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: MPEG-1 Layer II audio Context triple: [DVB-S, supportsTransport, MPEG-1 Layer II audio]
-
A.
HE-AAC v2
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.
-
B.
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.
-
C.
Advanced Audio Coding
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.
-
D.
Speex
Speex is an open-source, patent-free audio compression codec designed primarily for efficient, high-quality speech encoding.
-
E.
ALAC
ALAC is the At-Large Advisory Committee within ICANN that represents the interests of individual Internet users in global domain name policy development.
- 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: MPEG-1 Layer II audio Target entity description: MPEG-1 Layer II audio is a lossy audio compression format widely used in digital broadcasting and early digital media for efficient, good-quality stereo sound.
-
A.
HE-AAC v2
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.
-
B.
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.
-
C.
Advanced Audio Coding
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.
-
D.
Speex
Speex is an open-source, patent-free audio compression codec designed primarily for efficient, high-quality speech encoding.
-
E.
ALAC
ALAC is the At-Large Advisory Committee within ICANN that represents the interests of individual Internet users in global domain name policy development.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
audio compression format
ⓘ
lossy audio codec ⓘ |
| alsoKnownAs |
MP2
ⓘ
MPEG-1 Layer II audio ⓘ
surface form:
MPEG-1 Audio Layer II
|
| audioChannels |
mono
ⓘ
stereo ⓘ |
| backwardCompatibleWith |
MPEG-1 Layer II audio
self-linksurface differs
ⓘ
surface form:
MPEG-2 Layer II audio
|
| bitrateRange | 32–384 kbit/s ⓘ |
| compressionLoss | irreversible ⓘ |
| compressionRatio | approximately 4:1 to 6:1 ⓘ |
| compressionType | perceptual coding ⓘ |
| containerFormats |
Audio-only elementary stream
ⓘ
MPEG Program Stream ⓘ
surface form:
MPEG program stream
MPEG-TS ⓘ
surface form:
MPEG transport stream
|
| designedBy |
MPEG
ⓘ
surface form:
Moving Picture Experts Group
|
| designedFor | good-quality stereo sound at moderate bitrates ⓘ |
| fileExtension | .mp2 ⓘ |
| frameStructure | fixed-length frames with header and audio data ⓘ |
| introducedIn | early 1990s ⓘ |
| lessCommonTodayThan |
AAC
ⓘ
MPEG-1 Audio Layer III ⓘ
surface form:
MPEG-1 Layer III audio (MP3)
|
| optimizedFor | real-time encoding ⓘ |
| partOf |
ISO/IEC 11172
ⓘ
surface form:
MPEG-1 standard
|
| predecessorFormat | MUSICAM ⓘ |
| primaryDomain | broadcast and professional audio ⓘ |
| qualityAt | near-transparent quality at 256 kbit/s stereo ⓘ |
| regionUsage | widely used in Europe for broadcast audio ⓘ |
| relatedStandard |
MPEG-1 Layer II audio
self-linksurface differs
ⓘ
surface form:
MPEG-2 Audio Layer II
|
| samplingRates |
32 kHz
ⓘ
44.1 kHz ⓘ 48 kHz ⓘ |
| standardizedBy | ISO/IEC ⓘ |
| standardNumber | ISO/IEC 11172-3 ⓘ |
| successorFormat |
MPEG-1 Audio Layer III
ⓘ
surface form:
MPEG-1 Layer III audio
MPEG-2 AAC ⓘ |
| supports |
CRC error protection
ⓘ
emphasis flags ⓘ joint stereo ⓘ |
| typicalUse |
VCD audio
ⓘ
digital radio broadcasting ⓘ digital television broadcasting ⓘ early digital video discs ⓘ |
| usedIn |
DAB digital radio
ⓘ
DVB digital television ⓘ DVD-Video audio tracks (in some regions) ⓘ |
| uses |
psychoacoustic model
ⓘ
subband coding ⓘ |
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: MPEG-1 Layer II audio Description of subject: MPEG-1 Layer II audio is a lossy audio compression format widely used in digital broadcasting and early digital media for efficient, good-quality stereo sound.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
MPEG-1 Layer II
this entity surface form:
MPEG-1 Audio Layer II
this entity surface form:
MPEG-2 Layer II audio
this entity surface form:
MPEG-2 Audio Layer II