HDR Assessment & Evaluation Techniques 5

Question 1

During HDR10+ content evaluation, what distinguishes its metadata from standard HDR10 static metadata?

Accepted Answer

HDR10+ uses dynamic metadata that can change tone mapping parameters on a scene-by-scene or frame-by-frame basis

Answer

HDR10+ uses dynamic metadata (per-scene or per-frame) to guide tone mapping, allowing displays to optimize each scene independently rather than applying fixed static metadata.

Question 2

When evaluating the color accuracy of an HDR display, which color difference metric is most commonly used?

Accepted Answer

Delta-E (ΔE)

Answer

Delta-E (ΔE) quantifies perceptual color difference between a measured color and the target, with ΔE < 2 generally considered acceptable for reference monitoring.

Question 3

What is the purpose of a PLUGE (Picture Line-Up Generation Equipment) pattern in HDR display setup and evaluation?

Accepted Answer

Setting accurate black level (near-black alignment) on the display

Answer

PLUGE patterns contain sub-black and near-black bars used to adjust display brightness/black level so that just-below-black signals are invisible while true black is accurately reproduced.

Question 4

In an HDR content delivery pipeline evaluation, what does 'legal range' vs. 'full range' signal level refer to?

Accepted Answer

Legal range is 16-235 (video levels) while full range is 0-255, and mixing them causes incorrect brightness in HDR

Answer

Legal (video) range uses code values 64-940 in 10-bit (16-235 in 8-bit) while full range uses 0-1023 (0-255); a mismatch causes crushed blacks or clipped whites in the HDR display.

Question 5

What evaluation criteria determines whether a display is qualified as an 'HDR Reference Monitor' suitable for mastering?

Accepted Answer

Must meet minimum peak luminance (typically 1000+ nits), black level, color gamut, and calibration accuracy thresholds

Answer

HDR reference monitors must meet strict specifications for peak luminance, minimum black level, DCI-P3/BT.2020 gamut coverage, and calibration accuracy to accurately represent mastered content.

(HDR) High Dynamic Range Certification Practice Test

(HDR) High Dynamic Range Certification Practice Test

HDR Assessment & Evaluation Techniques 5