MPEG-1 Layer II audio

E384761

audio compression format lossy audio codec

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.

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

All labels observed (6)

Label	Occurrences
MPEG-1 Audio Layer II	3
MPEG-2 Audio Layer II	3
MPEG-1 Audio Layer I	1
MPEG-1 Layer II	1
MPEG-1 Layer II audio canonical	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 Audio Layer II ⓘ linked to: MPEG-1 Layer II audio
audioChannels	mono ⓘ stereo ⓘ
backwardCompatibleWith	MPEG-2 Layer II audio ⓘ linked to: MPEG-1 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 ⓘ linked to: MPEG Program Stream MPEG transport stream ⓘ linked to: MPEG-TS
designedBy	Moving Picture Experts Group ⓘ linked to: MPEG
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 Layer III audio (MP3) ⓘ linked to: MPEG-1 Audio Layer III
optimizedFor	real-time encoding ⓘ
partOf	MPEG-1 standard ⓘ linked to: ISO/IEC 11172
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-2 Audio Layer II ⓘ linked to: MPEG-1 Layer II audio
samplingRates	32 kHz ⓘ 44.1 kHz ⓘ 48 kHz ⓘ
standardizedBy	ISO/IEC ⓘ
standardNumber	ISO/IEC 11172-3 ⓘ
successorFormat	MPEG-1 Layer III audio ⓘ linked to: MPEG-1 Audio Layer III 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