Section 6
–
Video Output Menu
Copyright 2007-2017 Lumagen, Inc Radiance Pro, Rev 071719
16
Colorspace
Select the output
Colorspace
. The choices are Auto, HDR2020, SDR2020, SDRP3, SDR709, and SDR601. The
default setting of
“
Auto
”
sets the output color space to match the input dynamic range and colorspace. For HDR
you can select
“SDR2020”
,
“SDRP3,” or “SDR709.” The best choice depends on the native “color Gamut” of the
display, and if you are going to do a 3D LUT calibration. See the
HDR Mapping
sections for more information.
“
SDR601
” is generally not used because
the Pro converts SD input sources to Rec 709. The command is:
MENU
→
Output
→
CMS’s
→
[CMS]
→
Colorspace
Grayscale and Gamma
Allows the parametric adjustment of 2, 5, 11, 12 or 21 color temperature points to adjust the grayscale and
gamma for the display. You need a colorimeter and preferably color calibration software to use this command. The
command is:
MENU
→
Output
→
CMS’s
→
[CMS]
→
Gray/Gamma
Color Decoder
Used to correct color decoder errors in the display that have red and/or green push. This adjustment is generally
not used in conjunction with Color Gamut 3D LUT based calibration. However, if you know your display has a color
decoder error, you can use this command before the 1D and 3D LIT calibration to compensate for the color
decoder error. The command is:
MENU
→
Output
→
CMS’s
→
[CMS]
→
Color Decoder
Black Level
This command allows for accurate calibration of the black level.
Normally the “Brightness”
(
or “Black Level”
)
control in the display is used to set the black background level, and then the Radiance Pro Adjustable Contrast 2
pattern is used to set the black video reference. This command is also useful when a second black level is desired
(using a second output CMS
) for a “day” or “night” mode. The command is:
MENU
→
Output
→
CMS’s
→
[CMS]
→
Black
White Level
Used to set the
white level for the display. Normally the “Contrast” control on the display is used to set the white
level. It is recommended that the Radiance Contrast Pattern 1 (White and Black squares pattern) be used to set
the display’s white level. The command is:
MENU
→
Output
→
CMS’s
→
[CMS]
→
White
HDR Tone Mapping Initial Setup
HDR Intensity Mapping can map an HDR source for optimal viewing on either a HDR or SDR TV or projector. It is
always disabled for SDR sources. Note that by default the
CMS1
output configuration memory is automatically
selected for HDR sources. When using the Radiance Pro Tone Mapping, HDR source output should be selected as
SDR and
HDR Mapping
enabled.
NOTE:
A key concept to understand for HDR sources and HDR Tone Mapping is that data manipulation in the
pipeline does not always have to be
in “
HDR Gamma.
”
Just as DCI/P3 movies are put into a
“
Rec
2020 c
ontainer” for HDR, it is possible to
put the HDR Gamma into a “SDR container”
if this is
accounted for so that the onscreen image is correct. This is
not
somehow converting HDR to SDR.
Instead it is putting the
“
HDR in an SDR c
ontainer.”
Set the
CMS1->Colorspace->Colorspace
to SDR2020, SDRP3, or SDR709. Which one is best for your system
depends on the native color Gamut of the projector/TV, and whether a 3D LUT calibration will be completed. If
your projector has a color Gamut limited to Rec709, select SDR709 independent of if a 3D LUT calibration is
planned, or not. If your projector/TV color Gamut exceeds P3 you may want to select SDR2020. If, and only if, you
plan to a 3D LUT calibration, and your projector/TV has a color Gamut near P3, then you may want to choose
SDRP3 as the Output Colorspace.
Set the
CMS1->Colorspace->HDR Flag
to off for CMS1, unless you have a JVC projector. If you have a JVC
projector you can select the HDR Flag = On in CMS1, to select a different projector memory for HDR than is used
for SDR. Then make sure to select the projector Gamma as 2.4 (rather than Bt.2084) in the JVC projector memory
selected when the HDR flag is asserted
so the projector’s tone map
ping is disabled.