Analog Devices ADV7181B Manual page 82

ADV7181B
Subaddress Register Bit Description
0x41 Resample Reserved.
Control
SFL_INV. Controls the behavior of
the PAL switch bit.
Reserved.
0x48 Gemstar GDECEL[15:8]. See the Comments
Control 1 column.
0x49 Gemstar GDECEL[7:0]. See the Comments
Control 2 column.
0x4A Gemstar GDECOL[15:8]. See the Comments
Control 3 column.
0x4B Gemstar GDECOL[7:0]. See the Comments
Control 4 column.
0x4C Gemstar GDECAD. Controls the manner in
Control 5 which decoded Gemstar data is
inserted into the horizontal blanking
period.
Reserved.
0x4D CTI DNR CTI_EN. CTI enable.
Control 1
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.
Reserved.
DNR_EN. Enable or bypass the DNR
block.
Reserved.
0x4E CTI DNR CTI_CTH[7:0]. Specifies how big the
Control 2 amplitude step must be to be
steepened by the CTI block.
0x50 CTI DNR DNR_TH[7:0]. Specifies the
Control 4 maximum edge that is interpreted
as noise and is therefore blanked.
Bits
7 6 5 4 3 2 1
0 1 0 0 0
0
1
0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
x x x x x x x
0
1
0 0
0 1
1 0
1 1
0
0
1
1 1
0 0 0 0 1 0 0
0 0 0 0 1 0 0
Rev. B | Page 82 of 100
0 Comments
0 Set to default
SFL compatible with
ADV7190/ADV7191/
ADV7194 encoders
SFL compatible with
ADV717x/ADV7173x
encoders
Set to default
0 GDECEL[15:0]; 16
individual enable bits that
select the lines of video
0
(even field Lines 10 to 25)
that the decoder checks
for Gemstar-compatible
data
0 GDECOL[15:0]; 16
individual enable bits that
select the lines of video
(odd field Lines 10 to 25)
0
that the decoder checks
for Gemstar-compatible
data
0 Split data into half byte
1 Output in straight 8-bit
format
Undefined
0 Disable CTI
1 Enable CTI
Disable CTI alpha blender
Enable CTI alpha blender
Sharpest mixing
Sharp mixing
Smooth
Smoothest
Set to default
Bypass the DNR block
Enable the DNR block
Set to default
0 Set to 0x04 for A/V input;
set to 0x0A for tuner input
0
Notes
LSB = Line 10;
MSB = Line 25.
Default = Do not
check for Gemstar-
compatible data on
any lines[10 to 25]
in even fields.
LSB = Line 10;
MSB = Line 25.
Default = Do not
check for Gemstar-
compatible data on
any lines[10 to 25]
in odd fields.
To avoid 00/FF
code.