Color Level Suppression Under Lower
Illuminance
Working AGC gain can control both R – Y level
and B – Y level by the following equation.
R – Y level =
address 31h x {16 – (working AGC gain – address
5Ah) x address 5Bh ÷ 16} ÷ 16
B – Y level =
address 30h x {16 – (working AGC gain – address
5Ah) x address 5Bh ÷ 16} ÷ 16
{16 – (working AGC gain – address 5Ah) x
address 5Bh ÷ 16} ≤ 16
When (working AGC gain – address 5Ah) ≤ 0, ( ) = 0.
Aperture Level Suppression Under
Illuminance
Working AGC gain can control both the horizontal
aperture level and the vertical aperture level by the
following equation.
Horizontal aperture level =
address 68h x {16 – (working AGC gain – address
63h) x address 64h ÷ 16} ÷ 16
Vertical aperture level =
address 6Ah x {16 – (working AGC gain – address
63h) x address 64h ÷ 16} ÷ 16
{16 – (working AGC gain – address 63h) x
address 64h ÷ 16} ≤ 16
When (working AGC gain – address 63h) ≤ 0, ( ) = 0.
17
LR38269