Dpp Automatic Selection; Decimation Filter Selection For Stage 1; Table 41: Dpp Filter Auto Selection - Analog Devices Advantiv ADV7604 Hardware Manual

8.3.1

DPP Automatic Selection

The ADV7604 has an automatic selection algorithm for the decimation filters in the DPP block.
Based on the PRIM_MODE[3:0],
decides on the best filter mode to be used, as indicated in
Mode of Example
Operation
Quad rate COMP
oversampled
modes
Double rate COMP
oversampled
modes
No COMP or
oversampling HDMI(COMP)
mode
GR or
HDMI(GR)
1
No decimation
8.3.2

Decimation Filter Selection for Stage 1

The decimation filters in stage 1 of the DPP for channels A, B, and C can be automatically selected
or manually selected from a choice of three filter responses.
DCM_FILT_MAN_EN, DPP Map, Address 0x29, [2]
The DCM_FILT_MAN_EN
response and manual selection of the decimation filters in the first stage of the DPP section.
DCM_FILT_SEL is used to set the chosen filter.
Function
DCM_FILT_MAN_EN
0
1
Rev. F August 2010
VID_STD[5:0],

Table 41: DPP Filter Auto Selection

Output Interface
SD 4X2 4:4:4 (e.g. 30-bit)
SD 4X2 4:2:2 (e.g. 20-bit)
SD/PR 4x1 4:4:4 (e.g. 30-bit)
SD/PR 4x1 4:2:2 (e.g. 20-bit)
SD/HD/PR 2X1 4:2:2 (e.g. 20-bit)
HD 1x1, HDMI 1x1 4:4:4 (e.g. 30-bit)
PR 1x1 4:4:4 (e.g. 30-bit)
HD 1x1, HDMI 2x1 4:2:2 (e.g. 20-bit)
PR 1x1 4:2:2 (e.g. 20-bit)
All 4:2:2 (e.g. 20-bit)
All 4:4:4 (e.g. 30-bit)
bit allows the user to switch between the default decimation filter
Description
Default selection for decimation filters (refer to
Decimation filter response defined by DCM_FILT_SEL
191
and OP_FORMAT_SEL
Table 41.
Decimation
Factor for
Channel A
2
2
4
4
2
1
n/a
1
n/a
1
n/a
1
n/a
1
n/a
1
n/a
ADV7604
selected, the ADV7604
Decimation Figure Plot
Factor for
Channel B/C
2 Figure 57
4 Figure 57
4 Figure 60
8 Figure 60
4 Figure 57
1
n/a n/a
1
n/a n/a
2 Figure 55
2 Figure 55
2 Figure 55
1
n/a n/a
Table 41)