Cue Correction; Random Noise Reduction - Analog Devices ADV8003 Hardware Manual

3.2.3.6. CUE Correction

Color Upsampling Error (CUE) correction is implemented using a filter which removes the jagged edges caused by the artifacts
introduced by the incorrect upsampling of MPEG 2 video data in 4:2:0 format to the 4:2:2/4:4:4 formats supported by DVD players.
The CUE correction function can be enabled or disabled by di_cue_enable.
di_cue_enable, Primary VSP Map, Address 0xE84D[0]
This bit is used to enable CUE correction.
Function
di_cue_enable
0
1 

3.2.3.7. Random Noise Reduction

There are several noise reduction algorithms in the ADV8003 that help with the reduction of common sources of video noise. The
random noise reduction (RNR) block reduces the random noise which may be introduced in analog broadcasting or capturing. It employs
a temporal recursive algorithm to stabilize the static regions while just processing the luma channel. Users can configure the register
parameters to adjust the algorithm according to their preference. The amount level of RNR can be configured using di_rnr_level[1:0].
RNR supports both interlaced and progressive input. It can be enabled or disabled using di_rnr_enable.
di_rnr_enable, Primary VSP Map, Address 0xE84C[4]
This bit is used to enable random noise reduction (RNR).
Function
di_rnr_enable
0 
1
di_rnr_level[1:0], Primary VSP Map, Address 0xE84F[1:0]
This signal sets the RNR level.
Function
di_rnr_level[1:0]
00
01
10 
11
For the RNR feature to operate, two buffers in external memory must be allocated to store video information which will be used for noise
reduction purposes. The addresses of these two buffers can be set in the
The size of each buffer should be larger than RNR_BUF_SIZE, which can be calculated as shown in
Rev. B, August 2013
Bit
0xE8FA[5]
0xE8FA[6]
0xE8FA[7]
Description
Disable CUE correction
Enable CUE correction
Description
Disable RNR
Enable RNR
Description
N/A
Low
Middle
High
Disabled Cadence
5:5
6:4
8:7
pvsp_rnrbuf0_addr[31:0]
166
ADV8003 Hardware Manual
and pvsp_rnrbuf1_addr[31:0]
Equation 18.
registers.