Io XT/4K Capture, Display, Convert v14.0 55 www.aja.com
Digital Primaries
Selecting Custom HDR Mode allows the editing of digital primaries information
that is passed as metadata accompanying the video signal. However, when HLG
selected as the EOTF ditigal primaries information cannot be edited, because HLG
does not use metadata.
Display Mastering Luminance
Represents the minimum and maximum Display Mastering Luminance.
• Minimum: Denes the oor of the SMPTE ST 2086 color volume (in the case of
HDR) and is determined by the mastering environment.
• Range: 0.00000 cd/m2 to 1.00000 cd/m2.
• Step size: 0.00002 cd/m2.
• Maximum: Denes the ceiling of the SMPTE ST 2086 color volume (in the case
of HDR) and is determined by the mastering environment.
• Range: 1 cd/m2 to 65535 cd/m2.
• Step size: 1 cd/m2.
Maximum Content Light Level (CLL)
Represents the highest-value pixel component in an entire scene. It is
determined by analyzing each frame of video, and can be determined in the post
environment.
• Range: 1 cd/m2 to 65535 cd/m2.
• Step size: 1 cd/m2.
Maximum Frame Average Light Level (FALL)
Represents the maximum of frame-based average light levels taken over an entire
scene, and can be determined in the post environment.
• Range: 1 cd/m2 to 65535 cd/m2.
• Step size: 1 cd/m2.
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