Ed/Hd Gamma Correction; Figure 114: Signal Input (Ramp) And Signal Output For Gamma 0.5; Figure 115: Signal Input (Ramp) And Selectable Output Curves - Analog Devices ADV8003 Hardware Manual

Where the sum of each equation is rounded to the nearest integer, these must then all be converted to hex.
The gamma curves in Figure 114
8.4.17.1.

ED/HD Gamma Correction

To enable the gamma correction curves for ED/HD standards,
gamma_en_hdtv, Encoder Map, Address 0xE435[5]
This bit is used to enable the gamma correction curves for ED/HD video data.
Function
gamma_en_hdtv
0 
1
The ED/HD gamma correction curves are provided in
Rev. B, August 2013
and Figure 115 are examples only; any user defined curve in the range from 16 to 240 is acceptable.
GAMMA CORRECTION BLOCK OUTPUT TO A RAMP INPUT
300
250
200
150
100
50
0
0 50

Figure 114: Signal Input (Ramp) and Signal Output for Gamma 0.5

GAMMA CORRECTION BLOCK TO A RAMP INPUT FOR
300
250
200
150
100
50
0
0 50

Figure 115: Signal Input (Ramp) and Selectable Output Curves

Description
Disabled
Enabled
Table 84
SIGNAL OUTPUT
0.5
SIGNAL INPUT
100 150 200
LOCATION
VARIOUS GAMMA VALUES
0.3
0.5
1.5
1.8
100 150 200
LOCATION
gamma_en_hdtv must be programmed.
and Table 85.
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ADV8003 Hardware Manual
250
250