Dnr Block Offset Control; Sd Active Video Edge Control; Figure 125: Example Of Active Video Edge Functionality - Analog Devices ADV8003 Hardware Manual

In DNR mode, it is possible to subtract a fraction of the signal that lies below the set threshold, assumed to be noise, from the original
signal. The threshold is set using dnr_threshold[5:0].
When dnr_enable_sharpness
because this data is assumed to be valid data and not noise. The overall effect is that the signal is boosted (similar to using the extended
SSAF filter).
dnr_enable_sharpness, Encoder Map, Address 0xE4A5[3]
This bit is used to select the Digital Noise Reduction (DNR) mode.
Function
dnr_enable_sharpness
0 
1
8.4.19.8.

DNR Block Offset Control

blk_offset[3:0] allows a shift of the data block of 15 pixels maximum. The coring gain positions are fixed. The block offset shifts the data
in steps of one pixel so that the border coring gain factors can be applied at the same position regardless of variations in input timing of
the data.
blk_offset[3:0], Encoder Map, Address 0xE4A5[7:4]
This signal is used to configure the Digital Noise Reduction (DNR) block offset.
Function
blk_offset[3:0]
0000 
0001
1110
1111
8.4.19.9.

SD Active Video Edge Control

The ADV8003 encoder core is able to control fast rising and falling signals at the start and end of active video in order to minimize
ringing artifacts.
When the active video edge control feature is enabled, the first three pixels and the last three pixels of the active video on the luma
channel are scaled so that maximum transitions on these pixels are not possible. This feature is highlighted in
At the start of active video, the first three pixels are multiplied by 1/8, 1/2, and 7/8, respectively. Approaching the end of active video, the
last three pixels are multiplied by 7/8, 1/2, and 1/8, respectively. All other active video pixels pass through unprocessed.
Figure 127 show the difference between having this feature enabled and disabled. This feature can be enabled using slope_en.
Rev. B, August 2013
is enabled, it is possible to add a fraction of the signal that lies above the set threshold to the original signal
Description
DNR mode
DNR sharpness mode
Description
Zero pixel offset
One pixel offset
...
14 pixel offset
15 pixel offset
LUMA CHANNEL WITH
ACTIVE VIDEO EDGE
DISABLED
100 IRE
0 IRE

Figure 125: Example of Active Video Edge Functionality

LUMA CHANNEL WITH
ACTIVE VIDEO EDGE
ENABLED
100 IRE
87.5 IRE
50 IRE
12.5 IRE
0 IRE
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ADV8003 Hardware Manual
Figure 125.
Figure 126 and