
ADV7181B
Rev. 0 | Page 82 of 96
Bits
4
1
Subaddress
0x41
Register
Resample
Control
Bit Description
Reserved
SFL_INV. Controls the behavior of
the PAL switch bit.
7
6
0
5
0
3
0
2
0
1
0
0
0
Comments
Set to default
SFL compatible with
ADV7190/ADV7191/
ADV7194 encoders
SFL compatible with
ADV717x/ADV7173x
encoders
Set to default
GDECEL[15:0]. 16
individual enable bits that
select the lines of video
(even field Lines 10–25)
that the decoder checks
for Gemstar-compatible
data.
Notes
1
Reserved
GDECEL[15:8]. See the Comments
column.
GDECEL[7:0]. See above.
0
0
0
0
0
0
0
0
0
LSB = Line 10 MSB =
Line 25
Default = Do not
check for Gemstar-
compatible data on
any lines [10–25] in
even fields
LSB = Line 10 MSB =
Line 25
Default = Do not
check for Gemstar-
compatible data on
any lines [10–25] in
odd fields
To avoid 00/FF code.
0x48
Gemstar
Control 1
Gemstar
Control 2
0x49
0
0
0
0
0
0
0
0
0x4A
Gemstar
Control 3
GDECOL[15:8]. See the Comments
column.
GDECOL[7:0]. See above.
0
0
0
0
0
0
0
0
0x4B
Gemstar
Control 4
0
0
0
0
0
0
0
0
GDECOL[15:0]. 16
individual enable bits that
select the lines of video
(odd field Lines 10–25)
that the decoder checks
for Gemstar-compatible
data.
0
Split data into half byte
GDECAD. Controls the manner in
which decoded Gemstar data is
inserted into the horizontal blanking
period.
1
Output in straight 8-bit
format
0x4C
Gemstar
Control 5
Reserved
CTI_EN. CTI enable
x
x
x
x
x
x
x
0
1
0
1
Undefined
Disable CTI
Enable CTI
Disable CTI alpha blender
Enable CTI alpha blender
CTI_AB_EN. Enables the mixing of
the transient improved chroma with
the original signal.
CTI_AB[1:0]. Controls the behavior
of the alpha-blend circuitry.
1
0
1
0
0
1
0
0
0
0
0
1
1
1
0
1
0
1
0
0
0
Sharpest mixing
Sharp mixing
Smooth
Smoothest
Set to default
Bypass the DNR block
Enable the DNR block
Set to default
Set to 0x04 for A/V input;
set to 0x0A for tuner input
Reserved
DNR_EN. Enable or bypass the DNR
block.
0x4D
CTI DNR
Control 1
Reserved
CTI_CTH[7:0]. Specifies how big the
amplitude step must be to be
steepened by the CTI block.
DNR_TH[7:0]. Specifies the
maximum edge that is interpreted
as noise and is therefore blanked.
0x4E
CTI DNR
Control 2
0x50
CTI DNR
Control 4
0 0
0
0
1
0
0
0