AC-4
E1046974
AC-4 is a next-generation Dolby audio codec designed to deliver efficient, high-quality sound for modern broadcast, streaming, and immersive audio applications.
All labels observed (1)
| Label | Occurrences |
|---|---|
| AC-4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13556822 — 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: AC-4 Context triple: [Dolby AC-4, alsoKnownAs, AC-4]
-
A.
AC-4
AC-4 was a class of Southern Pacific Railroad articulated steam locomotives of the distinctive cab-forward design used primarily for heavy freight service over mountainous routes.
-
B.
AC-5
AC-5 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built in the late 1920s for heavy freight service over mountainous routes.
-
C.
FV104 Samaritan
The FV104 Samaritan is a British tracked armored ambulance vehicle derived from the CVR(T) light tank family, designed to evacuate and treat casualties on the battlefield.
-
D.
S-52
S-52 is an International Hydrographic Organization standard that defines specifications for the display and use of electronic navigational chart (ENC) data in electronic chart display and information systems (ECDIS).
-
E.
USS Albacore
USS Albacore was a U.S. Navy Gato-class submarine of World War II noted for its successful combat patrols in the Pacific, including the sinking of several Japanese warships.
- 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: AC-4 Target entity description: AC-4 is a next-generation Dolby audio codec designed to deliver efficient, high-quality sound for modern broadcast, streaming, and immersive audio applications.
-
A.
AC-4
AC-4 was a class of Southern Pacific Railroad articulated steam locomotives of the distinctive cab-forward design used primarily for heavy freight service over mountainous routes.
-
B.
AC-5
AC-5 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built in the late 1920s for heavy freight service over mountainous routes.
-
C.
FV104 Samaritan
The FV104 Samaritan is a British tracked armored ambulance vehicle derived from the CVR(T) light tank family, designed to evacuate and treat casualties on the battlefield.
-
D.
S-52
S-52 is an International Hydrographic Organization standard that defines specifications for the display and use of electronic navigational chart (ENC) data in electronic chart display and information systems (ECDIS).
-
E.
USS Albacore
USS Albacore was a U.S. Navy Gato-class submarine of World War II noted for its successful combat patrols in the Pacific, including the sinking of several Japanese warships.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Dolby audio technology
ⓘ
audio codec ⓘ |
| applicationDomain |
broadcast engineering
ⓘ
consumer media ⓘ streaming media technology ⓘ |
| audioCodingType | next-generation audio codec ⓘ |
| bitstreamType | single unified bitstream ⓘ |
| compressionType | lossy audio compression ⓘ |
| designGoal |
high audio quality at low bitrates
ⓘ
high coding efficiency ⓘ robustness for broadcast environments ⓘ support for immersive and personalized audio ⓘ |
| developer | Dolby Laboratories NERFINISHED ⓘ |
| feature |
backward-compatible core and extensions
ⓘ
independent substreams for different presentations ⓘ low-latency decoding ⓘ support for advanced accessibility features ⓘ support for alternate audio tracks ⓘ support for interactive audio experiences ⓘ support for loudness and dynamic range metadata ⓘ support for multiple languages in one bitstream ⓘ |
| includedInStandard |
ATSC 3.0 audio system
ⓘ
DVB audio specifications ⓘ |
| standardizedBy | ETSI NERFINISHED ⓘ |
| standardNumber |
ETSI TS 103 190
NERFINISHED
ⓘ
ETSI TS 103 190-2 NERFINISHED ⓘ ETSI TS 103 190-3 NERFINISHED ⓘ |
| successorOf | Dolby Digital Plus NERFINISHED ⓘ |
| supports |
Dolby Atmos
NERFINISHED
ⓘ
advanced loudness control ⓘ broadcast audio ⓘ channel-based audio ⓘ dialogue enhancement ⓘ immersive audio ⓘ metadata-driven audio experiences ⓘ multiple presentations ⓘ object-based audio ⓘ personalized audio ⓘ streaming audio ⓘ |
| useCase |
OTT streaming services
ⓘ
digital television broadcasting ⓘ game consoles ⓘ home theater systems ⓘ mobile streaming ⓘ set-top boxes ⓘ smart TVs ⓘ soundbars ⓘ |
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: AC-4 Description of subject: AC-4 is a next-generation Dolby audio codec designed to deliver efficient, high-quality sound for modern broadcast, streaming, and immersive audio applications.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.