AV3168/69
LUMINANCE PROCESSING
The luminance, Y, are interpolated to 27 Mhz sampling rate through a multi-tap linear poly-phase filter. The filter
frequency response is flat from 0 to 5 MHz. Contrast and Brightness control are provided for minor adjustment
only.
Contrast Control
Item
1
2
3
4
CREG1<1:0>
00
01
10
11
Contrast
Normal
Less Contrast
Least Contrast
High Contrast
.
Brightness Control
Item
1
2
3
4
CREG1<3:2>
00
01
10
11
Contrast
Normal
Modest Brightness
High Brightness
Less Brightness
LUMINANCE FILTER
luminance Filter Frequency Response
0
-10
-20
-30
-40
-50
0
2
4
6
8
10 12
Frequency (Mhz)
11-24
January 4, 2001