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R699860 - Siglos Plus User Manual
4K AND UHD SOURCES SETTINGS
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9.3  High Dynamic Range sources
Identifying HDR sources.
HDR sources are almost exclusively from the latest UHD discs or TV programs that come with an HDR logo. If
your player supports this format, this unit should automatically detect the HDR format thanks to the HDMI 2.0
handshake and the projector should apply automatically the correct EOTF (Gamma D)
Applying the correct Gamma settings
If the source is clearly identified to be using High Dynamic Range, the projector should display “HDR:
YES” in the Menu > Information Menu. Additionally, the correct Gamma “D” value should be applied
automatically.
If your HDR image seems dull and without depth, you can check that Gamma D is correctly selected, if it is not,
you can also manually set gamma to Gamma D in the menu, you may select a user profile between User 1 and
User 5 in order to manually select the Gamma D if your picture Profile doesn’t allow Gamma D settings:
Menu > Picture Adjust > Picture Mode > User 1
Menu > Picture Adjust > Gamma > (HDR EOTF) D
BT-2020 inputs can be assigned to any available User “Picture Mode”. The User picture modes can be
renamed to a more convenient name.
Tweaking the Gamma adjustments for 10,000 NITS sources
Gamma D default value matches an EOTF for HDR sources up to 10,000 NITS. The default advanced adjustments
are as follow:
Gamma: D
Picture Tone: 0
Dark Level: 0
Bright Level: 0
Gamma Adjustments for UHD discs (1,000 NITS)
Unfortunately, the recent UHD discs generally use 1,000 NITS dynamic only. This is why the Gamma D
adjustments should be adapted as below.
Menu > Picture Adjust > Gamma > Advanced Gamma > Picture Tone +11 up to +15
Menu > Picture Adjust > Gamma > Advanced Gamma > Dark Level: +5
Menu > Picture Adjust > Gamma > Advanced Gamma > Bright Level: +4
Picture Tone adjustment: this adjustment changes the overall brightness of the picture. Select a value between
11 and 15 depending of your screen size. Select a value of 11 for a screen size of 2.5m, rise this setting to
your convenience up to 15 for larger screens.
Dark Level: rise this level if the blacks are still too deep, recommended value for UHD Discs: +5
Bright Level: There are several HDR encoding with different maximum brightness. Rise this level if the white
portions of the picture are not totally light up. Recommended setting for UHD Discs: +4
9.4  BT-2020ColorProle(PSver.100310required)
How to identify BT-2020 sources
Nowadays UHD discs and 4K sources can use BT-2020 color encoding, it may eventually be a REC-709 or
DCI-P3 gamut encoded into a BT-2020 profile or a true BT-2020 color profile. Since this unit can only detect the
color profile and not the encoding, some UHD discs may appear show incorrect colors when using the dedicated
BT-2020 color profile. If this is the case, it is better to switch to another color profile and use a standard profile
such as Cinema for DCI-P3 colors or Film for REC-709 colors.
REC-709 colors:
Menu > Picture Adjust > Color Prole > Film
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