HDR Calibration & Display Measurement 3

Question 1

What surround luminance does ITU-R BT.2100 recommend for a professional HDR grading environment?

Accepted Answer

5 cd/m²

Answer

Complete darkness (0 cd/m²)

Answer

10 cd/m²

Answer

50 cd/m²

Question 2

What is the function of a 3D Look-Up Table (3D LUT) in HDR display calibration?

Accepted Answer

To map input color values to corrected output values across the full three-dimensional color space

Answer

To store the display's pixel clock timing and synchronization data

Answer

To convert between frame rates for different broadcast standards

Answer

To compress HDR signal data for more efficient storage

Question 3

Which HDR format uses the scene-referred Hybrid Log-Gamma (HLG) transfer function rather than the PQ curve?

Accepted Answer

HLG as defined in ITU-R BT.2100

Answer

HDR10

Answer

Dolby Vision

Answer

HDR10+

Question 4

What does a delta-E (ΔE) value quantify in the context of display calibration?

Accepted Answer

The perceptual color difference between a target color and a measured color

Answer

Total luminance output of a display expressed in nits

Answer

The energy efficiency rating of an HDR-capable display

Answer

The electrical signal level at the display's video input

Question 5

What is the primary role of display calibration software such as CalMAN or LightSpace in an HDR post-production workflow?

Accepted Answer

To automatically measure display performance, analyze deviations, and generate correction profiles such as 3D LUTs

Answer

To generate and embed HDR metadata into distribution masters

Answer

To compress HDR video signals for cost-effective file storage

Answer

To convert SDR archival content into HDR format

Question 6

What is the fundamental difference between the static metadata used in HDR10 and the dynamic metadata used in HDR10+ and Dolby Vision?

Accepted Answer

Static metadata provides one fixed set of values for the entire content, while dynamic metadata adjusts values per scene or frame

Answer

Static metadata applies only to the mastering display, while dynamic metadata applies to consumer displays

Answer

Static metadata is embedded in the video stream, while dynamic metadata is always delivered as a separate sidecar file

Answer

Static metadata is required for 4K content while dynamic metadata is mandatory for 8K content

Question 7

Why is measuring a display's minimum luminance (black level) critical in a professional HDR calibration workflow?

Accepted Answer

It directly impacts the achievable contrast ratio and accuracy of shadow detail reproduction

Answer

It determines the maximum peak brightness achievable by the display

Answer

It controls the width of the display's color gamut at peak luminance

Answer

It sets the color temperature of the display's reference white point