ISF HDR Standards & Tone Mapping 3

Question 1

In PQ (SMPTE ST 2084) calibration, what luminance level represents diffuse (reference) white?

Accepted Answer

203 nits

Answer

100 nits

Answer

1,000 nits

Answer

400 nits

Question 2

What is 'clipping' in the context of HDR tone mapping?

Accepted Answer

Loss of highlight detail when content luminance exceeds the display's peak capability

Answer

Crushing of luminance values below the black level

Answer

Automatic saturation reduction near white

Answer

Frame rate reduction at high average picture levels

Question 3

What luminance value does code value 0 represent in SMPTE ST 2084 (PQ)?

Accepted Answer

0 nits (absolute black)

Answer

0.001 nits

Answer

0.0001 nits

Answer

0.01 nits

Question 4

When evaluating HDR display performance for ISF calibration, which pair of measurements is most critical?

Accepted Answer

Both peak white and black level to calculate dynamic range

Answer

Peak white only

Answer

Black level only

Answer

Average Picture Level (APL) and color temperature

Question 5

What is the minimum peak luminance requirement for an LCD-type display to achieve UHD Alliance 'Ultra HD Premium' certification?

Accepted Answer

1,000 nits

Answer

400 nits

Answer

600 nits

Answer

4,000 nits

Question 6

What primary advantage does Dolby Vision's 12-bit processing offer over HDR10's 10-bit processing?

Accepted Answer

Greater tonal precision with fewer banding artifacts in smooth gradients

Answer

Higher maximum frame rates

Answer

Wider color gamut coverage

Answer

Lower transmission bandwidth requirements

Question 7

In tone mapping, what does 'roll-off' refer to when approaching a display's peak luminance?

Accepted Answer

The gradual, smooth compression of highlights to preserve detail rather than hard clipping

Answer

A reduction in color saturation near white

Answer

Automatic backlight reduction at high APL

Answer

Frame rate reduction to reduce thermal output