ADV8005 Hardware Reference Manual
UG-707
dnr_coring_gain_b[3:0]
, Encoder Map,
Address 0xE4A3[3:0]
This signal is used to configure the coring gain data (in Digital Noise Reduction (DNR) mode, the values in brackets apply).
Function
dnr_coring_gain_b[3:0]
Description
0000 (default)
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]
7.4.19.3.
DNR Threshold
is used to define the threshold value in the range of 0 to 63. The range is an absolute value.
dnr_threshold[5:0]
, Encoder Map,
Address 0xE4A4[5:0]
This signal is used to configure the Digital Noise Reduction (DNR) threshold.
Function
dnr_threshold[5:0]
Description
000000 (default)
0
000001
1
...
111110
62
111111
63
7.4.19.4.
Border Area
When
is set to 1, the block transition area can be defined to consist of four pixels. If this bit is set to logic 0, the border transition
area consists of two pixels, where one pixel refers to two clock cycles at 27 MHz.
Figure 129: SD DNR Border Area
blk_border_2
, Encoder Map,
Address 0xE4A4[6]
This bit is used to select the Digital Noise Reduction (DNR) border area.
Function
blk_border_2
Description
0 (default)
2 pixels
1
4 pixels
7.4.19.5.
Block Size Control
is used to select the size of the data blocks to be processed. Setting the block size control function to 1 defines a 16 pixel × 16 pixel
data block, and 0 defines an 8 pixel × 8 pixel data block, where one pixel refers to two clock cycles at 27 MHz.
720 × 485 PIXELS
(NTSC)
8 × 8 PIXEL BLOCK
TWO-PIXEL
BORDER
DATA
8 × 8 PIXEL BLOCK
06398-
080
Rev. A | Page 273 of 317
