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4K AND UHD SETTINGS
R699870 - Helios User Manual 25
Low: this setting reduces image blurring.
High: stronger reduction of image blurring.
6.10  Contrast
The contrast function is used to adjust the contrast between the light and dark areas of the displayed image. A
correct contrast setting is important for good image reproduction. Adjust the Contrast value between -50 and 50.
6.11  Brightness
The brightness function is used to adjust the overall light output. Adjust the Brightness value between -50 and 50.
6.12  Color
The Color function is used to adjust the saturation levels. Adjust the Color value between -50 and 50.
6.13  Tint
The hue function is used to adjust the color tint to obtain true color reproduction. Adjust the Tint value between
-50 (more red) and 50 (more green).
7.0  4K AND UHD SETTINGS
7.1  Important Information
It is important to clearly identify that your video source is encoded in 4K/UHD resolution, then determine if it
supports High Dynamic Range (HDR logo should be displayed on the UHD box or on the program) and/or if it
also uses REC-709, DCI-P3 or BT-2020 color proles.
Choosing the correct color prole is very important to obtain the best performances from your source and to have
a perfect colorimetry with a greater sense of depth.
7.2  ChoosingthecorrectInputlevel
Because the Input level of 4K sources are generally “(0-255) Enhanced” input levels, and at the contrary, classic
Blu-Ray discs and HDTV programs use “(16-235) Standard” Input levels. It is important to clearly identify and to
select the correct input level to achieve perfect blacks.
To identify the correct level, you can for example select a dark scene from your movie and switch between
Standard and Enhanced Input levels. The correct Input level would be “Enhanced” if this setting gives the
deepest blacks. If both settings give the same result, then your source uses “Standard” levels.
Generally UHD sources use Enhanced levels: You may try to congure your UHD player to output
Standard levels to be consistent settings with Blu-Ray playback.
Menu > Input Signal > Input level > (0-255) Enhanced
7.3  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 identied to be using High Dynamic Range, the projector should display “HDR:
25


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