Ed/Hd Filters; Figure 109: Prpb Ssaf Filter - Analog Devices ADV8003 Hardware Manual

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]
000 
001
010
011
100
101
110
111
In addition to the chroma filters listed with chroma_filter_sel[2:0], 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
109 for more details. To enable this 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
1 
0
If this filter is disabled, one of the chroma filters shown in

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
filter when enabled and disabled. This filter is enabled by default but can be disabled using sinc_filt_df_en.
Rev. B, August 2013
Description
1.3MHz
0.65MHz
1MHz
2MHz
Reserved
Chroma CIF
Chroma QCIF
3MHz
wide_uv_filt should be set to 1.
EXTENDED (SSAF) PrPb FILTER MODE
0
–10
–20
–30
–40
–50
–60
0 1 2

Figure 109: PrPb SSAF Filter

Description
Enabled
Disabled
Table 79
3 4 5 6
FREQUENCY (MHz)
can be selected and used for the CVBS or luma/chroma signal.
Figure 110
318
ADV8003 Hardware Manual
and Figure 111 which show the effect of the
Figure