adv7180 Analog Devices, Inc., adv7180 Datasheet - Page 39

• Manufacturer Part Number: adv7180
• Description: 10-bit, 4 X Oversampling Sdtv Video Decoder
• Manufacturer: Analog Devices, Inc.

YCMN[2:0], Luma Comb Mode NTSC, Address 0x38 [2:0]
Table 52. YCMN Function
YCMN[2:0]
0xx
(default)
100
101
110
111
PAL Comb Filter Settings
Used for PAL B/G/H/I/D, PAL M, PAL Combinational N,
PAL 60, and NTSC 4.43 CVBS inputs.
PSFSEL[1:0], Split Filter Selection PAL, Address 0x19 [1:0]
The PSFSEL[1:0] control selects how much of the overall signal
bandwidth is fed to the combs. A wide split filter selection
eliminates dot crawl, but shows imperfections on diagonal lines.
The opposite is true for selecting a narrow bandwidth split filter.
Table 53. PSFSEL Function
PSFSEL[1:0]
00
01 (default)
10
11
CTAPSP[1:0], Chroma Comb Taps PAL, Address 0x39 [7:6]
Table 54. CTAPSP Function
CTAPSP[1:0]
00
01
10
11 (default)
Description
Adaptive comb mode
Disable luma comb
Fixed luma comb (top
lines of line memory)
Fixed luma comb (all
lines of line memory)
Fixed luma comb
(bottom lines of line
memory)
Description
Narrow
Medium
Wide
Widest
Description
Do not use
PAL chroma comb adapts five lines (three taps)
to three lines (two taps); cancels cross luma only
PAL chroma comb adapts five lines (five taps) to
three lines (three taps); cancels cross luma and
hue error less well
PAL chroma comb adapts five lines (five taps) to
four lines (four taps); cancels cross luma and hue
error well
Configuration
Adaptive 3-line (three
taps) luma comb
Use low-pass/notch
filter; see the Y Shaping
Filter section
Fixed 2-line (two taps)
luma comb
Fixed 3-line (three taps)
luma comb
Fixed 2-line (two taps)
luma comb
Rev. B | Page 39 of 112
CCMP[2:0], Chroma Comb Mode PAL, Address 0x39 [5:3]
Table 55. CCMP Function
CCMP[2:0]
0xx
(default)
100
101
110
111
YCMP[2:0], Luma Comb Mode PAL, Address 0x39 [2:0]
Table 56. YCMP Function
YCMP[2:0]
0xx
(default)
100
101
110
111
Description
Adaptive comb
mode
Disable chroma
comb
Fixed chroma comb
(top lines of line
memory)
Fixed chroma comb
(all lines of line
memory)
Fixed chroma comb
(bottom lines of line
memory)
Description
Adaptive comb mode
Disable luma comb
Fixed luma comb
(top lines of line
memory)
Fixed luma comb
(all lines of line
memory)
Fixed luma comb
(bottom lines of line
memory)
Configuration
Adaptive five lines (three
taps) luma comb
Use low-pass/notch filter;
see the Y Shaping Filter
section.
Fixed three lines (two taps)
luma comb
Fixed five lines (three taps)
luma comb
Fixed three lines (two taps)
luma comb
Configuration
Adaptive 3-line chroma
comb for CTAPSP = 01
Adaptive 4-line chroma
comb for CTAPSP = 10
Adaptive 5-line chroma
comb for CTAPSP = 11
Fixed 2-line chroma
comb for CTAPSP = 01
Fixed 3-line chroma
comb for CTAPSP = 10
Fixed 4-line chroma
comb for CTAPSP = 11
Fixed 3-line chroma
comb for CTAPSP = 01
Fixed 4-line chroma
comb for CTAPSP = 10
Fixed 5-line chroma
comb for CTAPSP = 11
Fixed 2-line chroma
comb for CTAPSP = 01
Fixed 3-line chroma
comb for CTAPSP = 10
Fixed 4-line chroma
comb for CTAPSP = 11
ADV7180