MDCT
E324964
MDCT (Modified Discrete Cosine Transform) is a time-frequency transform widely used in modern audio compression formats to efficiently represent sound with reduced data.
All labels observed (1)
| Label | Occurrences |
|---|---|
| MDCT canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3078584 — 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: MDCT Context triple: [Dolby Digital, usesTransform, MDCT]
-
A.
CT
CT is a 3GPP core network and terminals working group responsible for specifying protocols and interfaces for mobile telecommunications systems.
-
B.
CT
CT is the postcode area covering Canterbury and surrounding parts of east Kent in southeastern England.
-
C.
CT
CT is the official two-letter United States Postal Service abbreviation for the state of Connecticut.
-
D.
CT scanners
CT scanners are advanced medical imaging devices that use X-rays and computer processing to create detailed cross-sectional images of the body for diagnostic purposes.
-
E.
ECT
ECT is the three-letter station code used by Transport for London to identify Earl's Court Underground station.
- 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: MDCT Target entity description: MDCT (Modified Discrete Cosine Transform) is a time-frequency transform widely used in modern audio compression formats to efficiently represent sound with reduced data.
-
A.
CT
CT is a 3GPP core network and terminals working group responsible for specifying protocols and interfaces for mobile telecommunications systems.
-
B.
CT
CT is the postcode area covering Canterbury and surrounding parts of east Kent in southeastern England.
-
C.
CT
CT is the official two-letter United States Postal Service abbreviation for the state of Connecticut.
-
D.
CT scanners
CT scanners are advanced medical imaging devices that use X-rays and computer processing to create detailed cross-sectional images of the body for diagnostic purposes.
-
E.
ECT
ECT is the three-letter station code used by Transport for London to identify Earl's Court Underground station.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
audio coding tool
ⓘ
orthogonal transform ⓘ time-frequency transform ⓘ |
| abbreviationOf | Modified Discrete Cosine Transform ⓘ |
| advantage |
efficient representation of audio with reduced data rate
ⓘ
reduced pre-echo artifacts with appropriate windowing ⓘ smooth transitions between blocks ⓘ |
| appliedIn |
audio compression
ⓘ
lossy audio coding ⓘ perceptual audio coding ⓘ subband coding ⓘ |
| basedOn |
Fourier transform
ⓘ
surface form:
Discrete Cosine Transform
|
| coefficientType | real-valued coefficients ⓘ |
| domain | digital signal processing ⓘ |
| fullName | Modified Discrete Cosine Transform ⓘ |
| goal | represent sound efficiently with reduced data ⓘ |
| hasProperty |
50% overlap between adjacent blocks
ⓘ
critical sampling ⓘ good energy compaction ⓘ low blocking artifacts compared to block DCT ⓘ perfect reconstruction ⓘ |
| inputDomain | time domain audio samples ⓘ |
| introducedInField | audio coding research ⓘ |
| mathematicalNature | linear transform ⓘ |
| operatesOn | finite-length sample blocks ⓘ |
| outputDomain | frequency domain coefficients ⓘ |
| relatedConcept |
Fourier transform
ⓘ
surface form:
Discrete Cosine Transform
Modified Discrete Cosine Transform ⓘ
surface form:
Modified Discrete Sine Transform
lapped orthogonal transform ⓘ time-domain aliasing cancellation ⓘ |
| requires |
analysis window
ⓘ
synthesis window ⓘ |
| typicalBlockStructure | even-length blocks with 50% overlap ⓘ |
| typicalUseCase |
digital broadcasting audio
ⓘ
music compression ⓘ speech compression ⓘ streaming audio services ⓘ |
| usedInStandard |
AAC
ⓘ
Dolby Digital ⓘ MPEG-1 Audio Layer III ⓘ
surface form:
MP3
MPEG audio coding standards ⓘ Vorbis ⓘ
surface form:
Ogg Vorbis
Opus ⓘ WMA ⓘ |
| uses |
lapped transform structure
ⓘ
time-domain aliasing cancellation ⓘ |
| windowFunction |
KBD window
ⓘ
sine window ⓘ |
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: MDCT Description of subject: MDCT (Modified Discrete Cosine Transform) is a time-frequency transform widely used in modern audio compression formats to efficiently represent sound with reduced data.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.