HDR Standards & Formats 2 — Questions and Answers
Question 1: Which HDR standard uses a fixed peak luminance of 10,000 nits as its reference white ceiling?
- HDR10 (Correct answer)
- Dolby Vision
- HLG
- HDR10+
Correct answer: HDR10
HDR10 is mastered against a 10,000-nit absolute peak luminance ceiling defined by SMPTE ST 2084 (PQ curve).
Question 2: What is the primary technical difference between HDR10 and HDR10+?
- HDR10+ uses dynamic metadata per scene or frame; HDR10 uses static metadata (Correct answer)
- HDR10+ supports wider color gamut than HDR10
- HDR10+ requires Dolby licensing while HDR10 is free
- HDR10+ uses the HLG transfer function instead of PQ
Correct answer: HDR10+ uses dynamic metadata per scene or frame; HDR10 uses static metadata
HDR10+ adds dynamic metadata (developed by Samsung and Amazon) that adjusts tone mapping on a scene-by-scene or frame-by-frame basis.
Question 3: The ARIB STD-B67 standard is the formal specification for which HDR system?
- Dolby Vision
- HDR10+
- Hybrid Log-Gamma (HLG) (Correct answer)
- Technicolor Advanced HDR
Correct answer: Hybrid Log-Gamma (HLG)
ARIB STD-B67, developed jointly by BBC and NHK, is the official specification for Hybrid Log-Gamma (HLG).
Question 4: Which container format is REQUIRED to carry HDR10 content on Blu-ray Ultra HD discs?
- MP4
- MKV
- HEVC (H.265) inside an MVC wrapper
- HEVC (H.265) with SMPTE ST 2086 metadata in a transport stream (Correct answer)
Correct answer: HEVC (H.265) with SMPTE ST 2086 metadata in a transport stream
Ultra HD Blu-ray mandates HEVC video encoding combined with SMPTE ST 2086 static metadata carried in the stream.
Question 5: What color bit depth does the HDR10 specification require at minimum?
- 8-bit
- 10-bit (Correct answer)
- 12-bit
- 16-bit
Correct answer: 10-bit
HDR10 mandates at least 10-bit color depth to accommodate the expanded luminance range without excessive banding.
Question 6: Dolby Vision Profile 5 is specifically designed for which delivery scenario?
- Ultra HD Blu-ray disc playback
- Over-the-air broadcast
- Streaming and internet delivery without a base layer (Correct answer)
- Cinema theatrical projection
Correct answer: Streaming and internet delivery without a base layer
Dolby Vision Profile 5 is a single-layer, single-track profile optimized for OTT streaming services.
Question 7: Which ITU-R recommendation formally standardizes the PQ (Perceptual Quantizer) electro-optical transfer function used in HDR10?
- ITU-R BT.2020
- ITU-R BT.2100 (Correct answer)
- ITU-R BT.709
- ITU-R BT.1886
Correct answer: ITU-R BT.2100
ITU-R BT.2100 defines both the PQ and HLG transfer functions for HDR television production and distribution.
HDR Standards & Formats 2
Which HDR standard uses a fixed peak luminance of 10,000 nits as its reference white ceiling?