HDR Professional Standards & Best Practices 3

Question 1

Which viewing environment standard does the Society of Motion Picture and Television Engineers (SMPTE) recommend for HDR content evaluation in a professional grading suite?

Accepted Answer

ITU-R BT.2100 with 5% of peak white as surround lighting

Answer

ITU-R BT.2100 recommends a surround luminance of 5% of the reference white level for HDR evaluation environments.

Question 2

When creating a Hybrid Log-Gamma (HLG) master for broadcast, what is the key advantage of HLG over PQ for live production?

Accepted Answer

HLG is scene-referred and backward compatible with SDR displays without conversion

Answer

HLG's scene-referred nature means SDR displays can directly decode the signal without separate conversion, making it ideal for live broadcast where real-time SDR compatibility is critical.

Question 3

A client requests a 'P3 D65' color gamut deliverable. What does this specification mean?

Accepted Answer

DCI-P3 primaries with a D65 white point, used in consumer HDR displays

Answer

P3 D65 refers to the DCI-P3 color primaries paired with the D65 (6500K) white point, the standard used by Apple displays and many HDR consumer devices.

Question 4

What is the maximum bit depth specified by SMPTE ST 2084 (PQ) for HDR signal encoding?

Accepted Answer

12 bits

Answer

SMPTE ST 2084 specifies up to 12-bit encoding to represent the full PQ luminance range from 0.0001 to 10,000 nits with sufficient precision.

Question 5

Which professional practice helps prevent HDR banding artifacts in gradient regions during color grading?

Accepted Answer

Working in a floating-point color space such as ACEScct or linear light

Answer

Working in floating-point or high-bit-depth color spaces like ACEScct or linear light preserves precision in gradients, reducing quantization-induced banding.

(HDR) High Dynamic Range Certification Practice Test

(HDR) High Dynamic Range Certification Practice Test

HDR Professional Standards & Best Practices 3