HDR Workflow & Post-Production 3

Question 1

When delivering HDR content for Netflix, which mastering display peak luminance is typically required for HDR10 submissions?

Accepted Answer

1,000 nits

Answer

Netflix's HDR10 delivery specification requires mastering on a display capable of at least 1,000 nits peak luminance.

Question 2

What is 'legal range' vs 'full range' in the context of HDR video signals, and which is used for broadcast delivery?

Accepted Answer

Legal range uses values 16-235 (8-bit) and is standard for broadcast delivery

Answer

Legal range (16-235 for 8-bit, scaled accordingly for 10/12-bit) is the standard for broadcast delivery, while full range (0-255) is typically used for computer graphics and some streaming.

Question 3

In an ACES (Academy Color Encoding System) HDR workflow, what does the RRT (Reference Rendering Transform) do?

Accepted Answer

Applies a perceptual transform from the ACES scene-linear space toward a display-referred appearance

Answer

The RRT applies a perceptual, filmic transform to ACES scene-linear data, bringing it toward a display-referred appearance before the Output Transform is applied.

Question 4

A colorist notices that highlights in an HDR grade clip above 1,000 nits on consumer displays. What is the best corrective approach?

Accepted Answer

Trim highlights in the grade using a targeted luminance curve or hue-saturation-luminance (HSL) qualifier

Answer

Using a targeted luminance curve or HSL qualifier lets the colorist specifically control only the highlight region without compromising the rest of the grade.

Question 5

What is the role of the 'Output Transform' in an ACES HDR workflow?

Accepted Answer

It encodes the final output for a specific display device, such as a P3-D65 1000-nit HDR monitor

Answer

The Output Transform (OT) in ACES maps the display-referred signal from the RRT to the specific characteristics of the target display device and HDR format.

(HDR) High Dynamic Range Certification Practice Test

(HDR) High Dynamic Range Certification Practice Test

HDR Workflow & Post-Production 3