Dolby AC-4
E323796
Dolby AC-4 is an advanced audio codec designed for next-generation broadcast and streaming, offering high-efficiency compression, immersive and personalized sound, and support for modern formats like UHD and HDR video services.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Dolby AC-4 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2987439 — 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 AC-4 Context triple: [Dolby Laboratories, Inc., hasTechnology, Dolby AC-4]
-
A.
Dolby Digital
Dolby Digital is a multichannel digital audio encoding system widely used in cinema, home theater, and broadcast to deliver surround sound.
-
B.
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.
-
C.
Dolby Digital 5.1
Dolby Digital 5.1 is a surround sound audio format that delivers multichannel cinematic audio through five full-bandwidth speakers and one low-frequency effects channel.
-
D.
Dolby A
Dolby A is an early professional audio noise reduction system developed by Dolby Laboratories, widely used in analog recording and film sound before later Dolby formats superseded it.
-
E.
Dolby S
Dolby S is an advanced analog cassette noise reduction system developed by Dolby Laboratories to deliver near–CD-quality sound on consumer tape decks.
- 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 AC-4 Target entity description: Dolby AC-4 is an advanced audio codec designed for next-generation broadcast and streaming, offering high-efficiency compression, immersive and personalized sound, and support for modern formats like UHD and HDR video services.
-
A.
Dolby Digital
Dolby Digital is a multichannel digital audio encoding system widely used in cinema, home theater, and broadcast to deliver surround sound.
-
B.
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.
-
C.
Dolby Digital 5.1
Dolby Digital 5.1 is a surround sound audio format that delivers multichannel cinematic audio through five full-bandwidth speakers and one low-frequency effects channel.
-
D.
Dolby A
Dolby A is an early professional audio noise reduction system developed by Dolby Laboratories, widely used in analog recording and film sound before later Dolby formats superseded it.
-
E.
Dolby S
Dolby S is an advanced analog cassette noise reduction system developed by Dolby Laboratories to deliver near–CD-quality sound on consumer tape decks.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
audio codec
ⓘ
digital audio compression format ⓘ |
| alsoKnownAs | AC-4 ⓘ |
| compatibleWith |
UHD TVs with Dolby AC-4 decoders
ⓘ
set-top boxes supporting ATSC 3.0 ⓘ |
| designedFor |
internet streaming
ⓘ
next-generation broadcast ⓘ |
| developer | Dolby Laboratories ⓘ |
| feature |
backward-compatible stereo downmixing
ⓘ
core and enhancement layers ⓘ high-efficiency audio compression ⓘ improved coding efficiency over Dolby Digital Plus ⓘ metadata-driven personalization ⓘ robustness to transmission errors ⓘ scalable audio coding ⓘ support for multiple speaker layouts ⓘ |
| follows | Dolby Digital Plus ⓘ |
| includedIn | HbbTV specifications (as an audio option) ⓘ |
| partOfStandard |
ATSC 3.0 audio system
ⓘ
DVB broadcasting standards ⓘ
surface form:
DVB UHD-1 Phase 2 specification
|
| standardizedBy |
ATSC
ⓘ
DVB broadcasting standards ⓘ
surface form:
DVB
ETSI ⓘ |
| supports |
HDR video services
ⓘ
MPEG-H interoperability features (via standards alignment) ⓘ OTT streaming services ⓘ UHD video services ⓘ accessibility audio tracks ⓘ audio description services ⓘ binaural rendering for headphones ⓘ broadcast TV services ⓘ channel-based audio ⓘ dialogue enhancement ⓘ hybrid audio (objects and channels) ⓘ immersive audio ⓘ loudness and dynamic range control metadata ⓘ loudness normalization ⓘ low-latency audio modes ⓘ multiple languages in one bitstream ⓘ multiple presentations in one bitstream ⓘ object-based audio ⓘ personalized audio ⓘ |
| supportsChannelConfigurations | mono to multichannel immersive layouts ⓘ |
| supportsSampleRates | typical broadcast audio sample rates (e.g., 48 kHz) ⓘ |
| useCase |
interactive and personalized TV experiences
ⓘ
live sports broadcasting ⓘ premium movie streaming ⓘ |
| usedIn |
next-generation TV broadcast systems
ⓘ
streaming platforms supporting Dolby audio ⓘ |
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 AC-4 Description of subject: Dolby AC-4 is an advanced audio codec designed for next-generation broadcast and streaming, offering high-efficiency compression, immersive and personalized sound, and support for modern formats like UHD and HDR video services.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Dolby Laboratories, Inc.