HLG (Hybrid Log-Gamma)
E1046975
HLG (Hybrid Log-Gamma) is an HDR video standard developed for broadcast and live TV that is compatible with standard dynamic range displays while still delivering high dynamic range on supported devices.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HLG (Hybrid Log-Gamma) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13556905 — 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: HLG (Hybrid Log-Gamma) Context triple: [HDR10, competesWith, HLG (Hybrid Log-Gamma)]
-
A.
SMPTE ST 2084
SMPTE ST 2084 is a high-dynamic-range (HDR) electro‑optical transfer function standard, also known as Perceptual Quantizer (PQ), widely used in modern HDR video systems such as HDR10 and Dolby Vision.
-
B.
Dolby Vision
Dolby Vision is a high-dynamic-range (HDR) imaging technology that enhances video with greater brightness, contrast, and color accuracy for a more lifelike viewing experience.
-
C.
HDR10
HDR10 is an open high-dynamic-range video standard that uses static metadata to deliver enhanced brightness, contrast, and color compared to standard dynamic range content.
-
D.
sRGB
sRGB is a standard RGB color space widely used for digital images, displays, and the web to ensure consistent color reproduction across devices.
-
E.
SMPTE ST 2086 mastering display metadata standard
SMPTE ST 2086 is a standard that defines static mastering display color volume metadata for HDR content, specifying the color primaries, white point, and luminance characteristics of the reference display used during mastering.
- 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: HLG (Hybrid Log-Gamma) Target entity description: HLG (Hybrid Log-Gamma) is an HDR video standard developed for broadcast and live TV that is compatible with standard dynamic range displays while still delivering high dynamic range on supported devices.
-
A.
SMPTE ST 2084
SMPTE ST 2084 is a high-dynamic-range (HDR) electro‑optical transfer function standard, also known as Perceptual Quantizer (PQ), widely used in modern HDR video systems such as HDR10 and Dolby Vision.
-
B.
Dolby Vision
Dolby Vision is a high-dynamic-range (HDR) imaging technology that enhances video with greater brightness, contrast, and color accuracy for a more lifelike viewing experience.
-
C.
HDR10
HDR10 is an open high-dynamic-range video standard that uses static metadata to deliver enhanced brightness, contrast, and color compared to standard dynamic range content.
-
D.
sRGB
sRGB is a standard RGB color space widely used for digital images, displays, and the web to ensure consistent color reproduction across devices.
-
E.
SMPTE ST 2086 mastering display metadata standard
SMPTE ST 2086 is a standard that defines static mastering display color volume metadata for HDR content, specifying the color primaries, white point, and luminance characteristics of the reference display used during mastering.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
HDR transfer function
ⓘ
electro‑optical transfer function ⓘ video standard ⓘ |
| abbreviation | HLG NERFINISHED ⓘ |
| advantage | single signal for HDR and SDR displays ⓘ |
| backwardsCompatibleWith | SDR workflows ⓘ |
| belongsToStandardFamily | HDR-TV standards ⓘ |
| category | perceptual transfer function ⓘ |
| comparedWith | PQ (Perceptual Quantizer) NERFINISHED ⓘ |
| compatibleWith |
10‑bit video
ⓘ
12‑bit video ⓘ BT.2020 color gamut NERFINISHED ⓘ standard dynamic range displays ⓘ |
| decodingType | electrical‑to‑optical transfer function for displays ⓘ |
| designedFor |
broadcast television
ⓘ
high dynamic range video ⓘ live TV production ⓘ |
| developedBy |
BBC
NERFINISHED
ⓘ
NHK NERFINISHED ⓘ |
| doesNotRequire |
dynamic metadata
ⓘ
static metadata ⓘ |
| encodingType | optical‑to‑electrical transfer function for cameras ⓘ |
| fullName | Hybrid Log‑Gamma NERFINISHED ⓘ |
| goal | simplify HDR adoption in broadcast ⓘ |
| introducedBy |
BBC R&D
NERFINISHED
ⓘ
NHK Science & Technology Research Laboratories NERFINISHED ⓘ |
| introducedFor | next‑generation TV services ⓘ |
| provides | high dynamic range on supported devices ⓘ |
| regionOfEarlyAdoption |
Japan
NERFINISHED
ⓘ
United Kingdom NERFINISHED ⓘ |
| relatedStandard |
Advanced HDR by Technicolor
NERFINISHED
ⓘ
Dolby Vision NERFINISHED ⓘ HDR10 NERFINISHED ⓘ |
| standardizedBy | ITU-R NERFINISHED ⓘ |
| standardizedIn | ITU-R BT.2100 NERFINISHED ⓘ |
| supportedBy |
major streaming platforms
ⓘ
many HDR‑capable TVs ⓘ some set‑top boxes ⓘ |
| supports |
scene‑referred HDR
ⓘ
wide dynamic range ⓘ |
| targetedFor | broadcast distribution chains ⓘ |
| usedFor |
live events broadcasting
ⓘ
live sports broadcasting ⓘ |
| usedIn |
4K HDR TV services
ⓘ
UHDTV broadcasting ⓘ streaming video services ⓘ |
| uses |
gamma curve for mid‑tones and shadows
ⓘ
logarithmic curve for highlights ⓘ |
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: HLG (Hybrid Log-Gamma) Description of subject: HLG (Hybrid Log-Gamma) is an HDR video standard developed for broadcast and live TV that is compatible with standard dynamic range displays while still delivering high dynamic range on supported devices.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.