Figure 44: Peaking Controls - Analog Devices ADV7850 Hardware Manual

sdp_v_pk_flip[2:0] with sdp_v_pk_clip[1:0]
applied. sdp_v_pk_flip[2:0]
sdp_v_pk_clip[1:0] is a control that is applied after sdp_v_pk_flip[2:0]. It sets the positive and negative values of saturation. This
mechanism is explained in
sdp_v_pk_core[2:0] is the another control that is used to set the threshold of the output before applying it to gain block, below which
values are cored to 0. Refer to
sdp_v_pk_gain[3:0] in conjunction with
set to 1) or 0 to 4 (if sdp_v_pk_inv
sdp_v_pk_en, Addr 90 (SDP), Address 0x0E[3]
This control is used to enable the vertical peaking filter.
Function
sdp_v_pk_en
1
0 
sdp_v_pk_inv, Addr 90 (SDP), Address 0x23[7]
This control is used to enable an inverse vertical peaking filter operation.
Function
sdp_v_pk_inv
1
0 
sdp_v_pk_gain[3:0], Addr 90 (SDP), Address 0x23[6:3]
This control is used to adjust the gain for the vertical peaking filter. The user can select to boost or attenuate the mid region of the Y
spectrum around 3 MHz. The peaking filter can visually improve the picture by showing more definition on the picture details that
contain frequency components around 3 MHz. It is to be used in conjunction with an sdp_v_pk_inv range of 0 to 4 or 0 to -4,
depending on sdp_v_pk_inv.
Function
sdp_v_pk_gain[3:0]
0010 
Rev. A May 2012
are used to set the maximum amount of enhancement that can be added before the gain is
sets the maximum amount of enhancement. Above this value, the amount of enhancement is reduced.
Figure 44.
Figure 44.
sdp_v_pk_inv
is set to 0).
Flip Threshold/2
Clip Threshold
Flip
Threshold
Description
Enable vertical peaking
Disable vertical peaking
Description
Inverse peaking (attenuate HF)
Normal (gain HF)
Description
Default gain
sets the gain of the output that can be in the ranges of -1 to 0 (if
Enhancing Output
Core
Threshold
Core
Threshold
Clip Threshold
Flip Threshold/2

Figure 44: Peaking Controls

119
sdp_v_pk_inv
Filtered
Input
Flip
Threshold
ADV7850
is