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Error Code:

Sub-Black Levels

Description:

“Sub-Black Levels” can be used to describe measured setup video level falling below baseline.  

Impact:

Sub-Black levels impact the Technical and Content Quality of the asset.  Customer experience is negatively affected by color that appears unnatural or misrepresented.  Sub-black levels may also indicate a Full/ Legal range conversion issue. 

Severity Structure:

FYI

N/A

Issue

Black levels dip below baseline 700mV (SDR) or 0 nits (HDR).


How to Prevent:
                          

Monitor levels using waveform scopes.

Solution:

Any sub-black levels must be adjusted to at least baseline, as this is most likely a Full/ Legal range conversion issue.

 

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