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. |