SingMai Electronics
PT9 User Manual Revision 0.3
Page 14 of 38
Figure 7 NTSC Pre-emphasis filter.
Figure 8 PAL pre-emphasis filter.
PT9_Comb_filter.v
The comb filter is used to reduce the components of the composite video that can cause artifacts
when decoded with a line comb video decoder. A description of its operation may be found in
Chapter 7. The comb filter module also provides compensating delays for the chroma components.
ram_infer_generic.v
This module is a generic single port RAM that is used in the comb filter module.
Inphase Filter Frequency Response
Frequency in MHz
M
a
g
n
it
u
d
e
i
n
d
B
0
1
2
3
4
5
6
-14
-12
-10
-8
-6
-4
-2
0
2
Inphase Filter Frequency Response
Frequency in MHz
M
a
g
n
it
u
d
e
i
n
d
B
0
1
2
3
4
5
6
-14
-12
-10
-8
-6
-4
-2
0
2
