ADV8003 Hardware Manual
Rev. B, August 2013
340
Function
dnr_en
Description
1
Enabled
0
Disabled
8.4.19.1.
Coring Gain Border
is the gain factor applied to border areas (refer to
for more information on border areas). In DNR
mode, the range of gain values is 0 to -1 in decrements of 1/8. This factor is applied to the DNR filter output that lies below the set
threshold range. The result is then subtracted from the original signal.
In DNR sharpness mode, the range of gain values is 0 to 0.5 in increments of 1/16. This factor is applied to the DNR filter output that lies
above the threshold range. The result is added to the original signal.
dnr_coring_gain_a[3:0]
, Encoder Map,
Address 0xE4A3[7:4]
This signal is used to configure the coring gain border (in Digital Noise Reduction (DNR) mode, the values in brackets apply).
Function
dnr_coring_gain_a[3:0]
Description
0000
No gain
0001
+1/16 [−1/8]
0010
+2/16 [−2/8]
0011
+3/16 [−3/8]
0100
+4/16 [−4/8]
0101
+5/16 [−5/8]
0110
+6/16 [−6/8]
0111
+7/16 [−7/8]
1000
+8/16 [−1]
8.4.19.2.
Coring Gain Data
is the gain factor applied to the luma data inside the MPEG pixel block. In DNR mode, the range of gain values is
0 to -1 in decrements of 1/8. This factor is applied to the DNR filter output that lies below the set threshold range. The result is then
subtracted from the original signal.
In DNR sharpness mode, the range of gain values is 0 to 0.5 in increments of 1/16. This factor is applied to the DNR filter output that lies
above the threshold range. The result is added to the original signal.
explains the difference between SD DNR border gain and
data gain.
O X X X X X X O O X X X X X X O
O X X X X X X O O X X X X X X O
O X X X X X X O O X X X X X X O
DNR27 TO DNR24 = 0x01
OFFSET CAUSED
BY VARIATIONS IN
INPUT TIMING
APPLY BORDER
CORING GAIN
APPLY DATA
CORING GAIN
06398-
079
Figure 122: SD DNR Offset Control
Summary of Contents for ADV8003
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