Analog Devices ADV7181B Manual page 82

Multiformat sdtv video decoder
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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.

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