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Sub-Black Levels
Display Text Sub-Black Levels
Description “Sub-Black Levels” describes measured setup video level falling below the baseline, as visible on a waveform scope.
Impact Sub-Black levels can result in color that appears unnatural or misrepresented. Sub-black levels typically indicate a Full/Legal range conversion issue.
Severity Assessment Guidance
FYI N/A
Issue Black levels dip below baseline 0mV (SDR) or 0 nits (HDR).
Blocker N/A
Solutions
How to Prevent Monitor levels using waveform and/or histogram scopes.
How to Fix 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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