Block Size Control; Dnr Input Select Control; Dnr Mode Control; Figure 124: Sd Dnr Input Filter Select - Analog Devices ADV8003 Hardware Manual

Function
blk_border_2
0 
1
8.4.19.5.

Block Size Control

dnr_mpeg_1 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.
dnr_mpeg_1, Encoder Map, Address 0xE4A4[7]
This bit is used to select the Digital Noise Reduction (DNR) block size.
Function
dnr_mpeg_1
1
0 
8.4.19.6.

DNR Input Select Control

dnr_fmode_control[2:0] is used to select the filter which is applied to the incoming Y data. The signal that lies in the pass band of the
selected filter is the signal that is DNR processed.
dnr_fmode_control[2:0], Encoder Map, Address 0xE4A5[2:0]
This signal is used to configure the Digital Noise Reduction (DNR) input filter.
Function
dnr_fmode_control[2:0]
001
010
011
100
8.4.19.7.

DNR Mode Control

DNR works on the principle of defining low amplitude, high frequency signals as probable noise and subtracting this noise from the
original signal.
Rev. B, August 2013
Description
2 pixels
4 pixels
Description
16 pixels
8 pixels
Figure 124 shows the filter responses selectable with this control.
1.0
FILTER D
0.8
FILTER C
0.6
0.4
0.2
0
0 1 2

Figure 124: SD DNR Input Filter Select

Description
Filter A
Filter B
Filter C
Filter D
FILTER B
FILTER A
3 4 5 6
FREQUENCY (MHz)
342
ADV8003 Hardware Manual