ColorBox In-Line Color and HDR/SDR Transform v1.0 28 www.aja.com
Out Colorspace -
Select either BT.709 or BT.2020 as the output color space.
In Range -
Select either SMPTE Full or SMPTE Narrow
• SMPTE Full selects a full input scaling/range, which includes sub-blacks and
super-whites. Input video values of 0-1023 (10 bit) or 0-4095 (12 bit) are scaled
to 0-1 before being sent to the LUT processor.
• SMPTE Narrow selects a narrow input scaling/range, such that an input video
value of 0 represents black, and an input video value of 1 represents white.
Input video values of 64-940 (10 bit) or 256-3760 (12 bit) are scaled to 0-1
before being sent to the LUT processor.
Out Range-
- Select either SMPTE Full or SMPTE Narrow.
• SMPTE Full selects a full output scaling/range, which includes sub-blacks and
super-whites. Output values from 0-1 are scaled to 0-1023 (10 bit) or 0-4095
(12 bit).
• SMPTE Narrow selects a narrow output scaling/range. Output values from 0-1
will be scaled to 64-940 (10 bit) or 256-3760 (12 bit).
Transfer Characteristic -
Select either SDR, HLG or PQ.
• This setting indicates the transfer characteristic that will be signaled in the SDI
Output VPID, as well as the EOTF that will be signaled in the HDMI Output HDR
Infoframe. This setting has no effect on the pixel values.
1D LUT Nodes
With four 1D LUTs it is easy to manage your color processing pipeline to get the
best possible image. 1D LUTs are commonly used as “shaper LUTs” wrapping
around the 3D LUT. The front shaper 1D LUT allows you map perceptually
significant values, typically the darker part of the colorspace, to use more of
the 3D LUT transform data set resulting in a more effective use of the 3D LUT to
produce a better image. The backside shaper 1D LUT is usually the inverse of the
front, mapping pixel values into the original dynamic range. 1D LUTs can also be
effectively used as log-to-linear and linear-to-log transforms.
Figure 23. AJA Color 1D LUT Modes
Options, selected in that node's Configuration pane, include:
• LUT
• Dynamic
• Color Corrector
• SMPTE Narrow to SMPTE FULL
• SMPTE FULL to SMPTE Narrow
RGB Color Corrector
In the AJA Color Pipeline (ACP), 1D LUT nodes can be set up as RGB Color
Correctors for color correcting a source before or after 3D LUT processing. This is
a common workflow in live production applications.