Figure 43: Horizontal Peaking Band-Pass Filter 2; Vertical Peaking - Analog Devices ADV7850 Hardware Manual

sdp_h_pk_core[2:0], Addr 90 (SDP), Address 0x22[2:0]
This control is used to select the horizontal threshold from the eight possible values listed in the following table. If the filtered output is
less than the coring threshold, no high frequency is added back to the input. If the filter output is greater than the core threshold, it is
passed through unchanged to the next stage.
Function
sdp_h_pk_core[2:0]
000 
001
010
011
100
101
110
111
sdp_h_pk_gain[3:0], Addr 90 (SDP), Address 0x22[6:3]
This control is used to adjust the gain of the horizontal peaking filter. The peaking filter can visually improve the picture by showing
more definition on the picture details that contain frequency components around 3 MHz. The filter response is also user selectable
using the sdp_h_pk_band and sdp_h_pk_inv. It has a range of 0 to 4 or 0 to -4 depending on sdp_h_pk_inv.
Function
sdp_h_pk_gain[3:0]
0100 
Plots of the filter responses are shown in

Vertical Peaking

6.14.2
Vertical peaking contains several controls, which are described in this section.
vertical peaking.
Rev. A May 2012

Figure 43: Horizontal Peaking Band-Pass Filter 2

Description
0
8
16
24
32
40
48
56
Description
Default gain
Figure 41 to Figure 43.
sdp_v_pk_en is the main control that enables or disables
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ADV7850