ADV8003 Hardware Manual
Rev. B, August 2013
318
chroma_filter_sel[2:0]
, Encoder Map,
Address 0xE480[7:5]
This signal is used to configure the chroma filters for SD data.
Function
chroma_filter_sel[2:0]
Description
000
1.3MHz
001
0.65MHz
010
1MHz
011
2MHz
100
Reserved
101
Chroma CIF
110
Chroma QCIF
111
3MHz
In addition to the chroma filters listed with
, there is an SSAF filter that is specifically designed for the color
difference component outputs, Pr and Pb. This filter has a cutoff frequency of ~2.7 MHz and a gain of –40 dB at 3.8 MHz. Refer to
for more details. To enable this filter,
should be set to 1.
FREQUENCY (MHz)
0
G
AI
N (
d
B)
–10
–30
–50
–60
–20
–40
6
5
4
3
2
1
0
EXTENDED (SSAF) PrPb FILTER MODE
06398-
066
Figure 109: PrPb SSAF Filter
wide_uv_filt
, Encoder Map,
Address 0xE482[0]
This bit is used to enable the SSAF filter for PrPb SD data.
Function
wide_uv_filt
Description
1
Enabled
0
Disabled
If this filter is disabled, one of the chroma filters shown in
can be selected and used for the CVBS or luma/chroma signal.
8.4.7.2.
ED/HD Filters
The ADV8003 encoder core also includes a sinc compensation filter designed to counter the effect of sinc roll-off in DAC 1, DAC 2, and
DAC 3 while operating in ED/HD mode. The benefit of the filter is illustrated in
and
filter when enabled and disabled. This filter is enabled by default but can be disabled using
Summary of Contents for ADV8003
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