Analog Devices ADV7850 Hardware Manual page 286

Function
de_v_end[5:0]
100000
1111 11
000000 
000001
011111
de_v_start_even[5:0], Addr 44 (CP), Address 0x87[5:0]
This control is used to vary the start position of the VBI region in an even field. It stores a signed value represented in a twos
complement format. The unit of adjustment is one line.
Function
de_v_start_even[5:0]
100000...111111
000000 
000000...011111
de_v_end_even[5:0], Addr 44 (CP), Address 0x88[5:0]
This control is used to vary the position of the end of the VBI region in an even field. It stores a signed value represented in a twos
complement format. The unit of adjustment is one line.
Function
de_v_end_even[5:0]
100000...111111
000000 
000000...011111
The following controls are used to adjust 3D HDMI standards only.
de_v_start_r[3:0], Addr 44 (CP), Address 0x30[7:4]
This control is used to vary the position of the start of the extra VBI region between the left and right fields during the odd field in the
field alternative packing in 3D TV video format. It stores a signed value represented in a twos complement format. The unit of
de_v_end_even[9:0] is one line.
Function
de_v_start_r[3:0]
1000 to 1111
0000 
0001 to 0111
de_v_end_r[3:0], Addr 44 (CP), Address 0x30[3:0]
This control is used to vary the position of the start of the extra VBI region between the left and right fields during the odd field in the
field alternative packing in 3D TV video format. It stores a signed value represented in a twos complement format. The unit of
de_v_end_even[9:0] is one line.
Function
de_v_end_r[3:0]
1000 to 1111
0000 
0001 to 0111
Rev. A May 2012
Description
-32 lines of shift
-1 line of shift
Default
+1 line of shift
+31 lines of shift
Description
-32 lines ... -1 line
Default (0 lines)
1 line ... 31 lines
Description
-32 lines ... -1 line
Default (0 lines)
1 line ... 31 lines
Description
-8 lines to -1 line
Default (0 lines)
1 line to 7 lines
Description
-8 lines to -1 line
Default (0 lines)
1 line to 7 lines
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ADV7850