Dolby B noise reduction
E302968
Dolby B noise reduction is a consumer-oriented analog tape noise reduction system designed to reduce high-frequency hiss on cassette recordings while maintaining compatibility with standard playback equipment.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Dolby B noise reduction canonical | 7 |
| Dolby B playback | 1 |
| Dolby B playback (partial compatibility) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2849620 — 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: Dolby B noise reduction Context triple: [Dolby A-type noise reduction, successor, Dolby B noise reduction]
-
A.
Dolby A-type noise reduction
Dolby A-type noise reduction is a professional analog audio noise reduction system developed by Dolby Laboratories to reduce tape hiss in recording and film sound.
-
B.
Dolby Stereo
Dolby Stereo is a multichannel optical sound system for film that brought high-fidelity, surround-capable audio to movie theaters in the 1970s and 1980s.
-
C.
Dolby Audio
Dolby Audio is a suite of advanced audio processing technologies designed to deliver clearer, more immersive, and dynamically optimized sound across consumer devices and media.
-
D.
Dolby Digital
Dolby Digital is a multichannel digital audio encoding system widely used in cinema, home theater, and broadcast to deliver surround sound.
-
E.
Dolby SR
Dolby SR is an advanced professional analog noise reduction system developed by Dolby Laboratories to significantly improve the dynamic range and sound quality of film and audio recordings.
- 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: Dolby B noise reduction Target entity description: Dolby B noise reduction is a consumer-oriented analog tape noise reduction system designed to reduce high-frequency hiss on cassette recordings while maintaining compatibility with standard playback equipment.
-
A.
Dolby A-type noise reduction
Dolby A-type noise reduction is a professional analog audio noise reduction system developed by Dolby Laboratories to reduce tape hiss in recording and film sound.
-
B.
Dolby Stereo
Dolby Stereo is a multichannel optical sound system for film that brought high-fidelity, surround-capable audio to movie theaters in the 1970s and 1980s.
-
C.
Dolby Audio
Dolby Audio is a suite of advanced audio processing technologies designed to deliver clearer, more immersive, and dynamically optimized sound across consumer devices and media.
-
D.
Dolby Digital
Dolby Digital is a multichannel digital audio encoding system widely used in cinema, home theater, and broadcast to deliver surround sound.
-
E.
Dolby SR
Dolby SR is an advanced professional analog noise reduction system developed by Dolby Laboratories to significantly improve the dynamic range and sound quality of film and audio recordings.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
analog tape noise reduction system
ⓘ
consumer audio technology ⓘ |
| alternativeTo | dbx noise reduction on cassette ⓘ |
| backwardCompatibility | standard cassette playback equipment ⓘ |
| commonOn |
car cassette players
ⓘ
home cassette decks ⓘ portable cassette players ⓘ |
| comparedTo |
Dolby A noise reduction
ⓘ
linked to:
Dolby A-type noise reduction
|
| compatibility | playable on non-Dolby cassette decks ⓘ |
| component |
complementary high-frequency de-emphasis
ⓘ
level-dependent high-frequency pre-emphasis ⓘ |
| designedFor | consumer audio equipment ⓘ |
| designedTo | minimize audible side effects on non-Dolby playback ⓘ |
| developedBy | Dolby Laboratories ⓘ |
| effectOnPlaybackWithDecoding | reduced background hiss ⓘ |
| effectOnPlaybackWithoutDecoding | slightly brighter sound ⓘ |
| frequencyRangeTargeted | high audio frequencies ⓘ |
| influencedBy | professional Dolby A noise reduction principles ⓘ |
| introducedFor | consumer cassette decks ⓘ |
| introducedInDecade | 1960s ⓘ |
| labeling | indicated by the Dolby double-D symbol with letter B ⓘ |
| lessComplexThan |
Dolby A noise reduction
ⓘ
linked to:
Dolby A-type noise reduction
|
| marketPosition | entry-level Dolby noise reduction system ⓘ |
| namedAfter | Dolby Laboratories ⓘ |
| noiseReductionAmount | approximately 9–10 dB at 5 kHz ⓘ |
| operatingPrinciple | boost low-level high-frequency signals on record and attenuate them on playback ⓘ |
| optimizedFor | low-cost consumer tape mechanisms ⓘ |
| predecessorOf |
Dolby C noise reduction
ⓘ
Dolby S noise reduction ⓘ |
| primaryMedium |
analog magnetic tape
ⓘ
compact cassette ⓘ |
| processingType |
compander system
ⓘ
pre-emphasis and de-emphasis system ⓘ |
| purpose |
improve signal-to-noise ratio
ⓘ
reduce high-frequency tape hiss ⓘ |
| requires |
Dolby B decoder during playback for full effect
ⓘ
Dolby B encoder during recording ⓘ |
| standardization | widely adopted de facto standard for consumer cassette NR ⓘ |
| status | largely obsolete in mainstream consumer audio ⓘ |
| stillUsedIn |
legacy cassette collections
ⓘ
niche analog recording communities ⓘ |
| targetMarket | mass-market consumer audio users ⓘ |
| typicalBoost | up to about 10 dB at high frequencies during recording ⓘ |
| typicalCut | up to about 10 dB at high frequencies during playback ⓘ |
| usedIn |
home music recording
ⓘ
pre-recorded music cassettes ⓘ spoken word cassette releases ⓘ |
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: Dolby B noise reduction Description of subject: Dolby B noise reduction is a consumer-oriented analog tape noise reduction system designed to reduce high-frequency hiss on cassette recordings while maintaining compatibility with standard playback equipment.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Dolby B noise reduction
linked to: Dolby B noise reduction