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Barco - RHDM-2301 - User manual ___________________________________________________ 129
Addendum
7.4 OETF (Opto-Electrical Transfer Function)
The OETF defines how each input signal level (V) is transferred to light (L) at the display
side. It is defined by the OETF
shape
, the effective
gamma (
γ
)
and the displayed
video
range
.
OETF shapes:
• xvYCC (default)
• Rec.709
• Pure Gamma
• Extended Gamma
• SMPTE 240M
• sRGB
Gamma:
• Range: 1.0-3.0
• Step: 0.05
• Default setting: 2.35
Video range:
• 64-940 (legal Y’C
b
C
r
)
• 64-1019 (Y’C
b
C
r
with headroom)
• 4-940 (Y’C
b
C
r
with footroom)
• 4-1019 (Y’C
b
C
r
full range, R’G’B’ full range)
• 0-1023 (DVI RGB)
• Custom
The following table summarizes the recommended settings. However the actual OETF
choice is ultimately with the user. “R” stands for recommended and “a” stands for
alternative.
Table 8: OETF shapes
The OETF is a ‘window’ setting. A different OETF can be assigned to Window 1 and
Window 2. Any display input can be routed to each window.