ADV7181B
Rev. B | Page 35 of 100
CTAPSP[1:0] Chroma Comb Taps PAL, Address 0x39[7:6]
Table 48. CTAPSP Function
CTAPSP[1:0] Description
00
Do not use
01
PAL chroma comb adapts 5 lines (3 taps) to
3 lines (2 taps); cancels cross luma only
10
PAL chroma comb adapts 5 lines (5 taps) to
3 lines (3 taps); cancels cross luma and hue error less well
11 (default)
PAL chroma comb adapts 5 lines (5 taps) to
4 lines (4 taps); cancels cross luma and hue error well
CCMP[2:0] Chroma Comb Mode PAL, Address 0x39[5:3]
Table 49. CCMP Function
CCMP[2:0] Description
Configuration
Adaptive 3-line chroma comb for CTAPSP = 01
Adaptive 4-line chroma comb for CTAPSP = 10
0xx (default)
Adaptive comb mode
Adaptive 5-line chroma comb for CTAPSP = 11
100 Disable
chroma
comb
Fixed 2-line chroma comb for CTAPSP = 01
Fixed 3-line chroma comb for CTAPSP = 10
101
Fixed chroma comb (top lines of line memory)
Fixed 4-line chroma comb for CTAPSP = 11
Fixed 3-line chroma comb for CTAPSP = 01
Fixed 4-line chroma comb for CTAPSP = 10
110
Fixed chroma comb (all lines of line memory)
Fixed 5-line chroma comb for CTAPSP = 11
Fixed 2-line chroma comb for CTAPSP = 01
Fixed 3-line chroma comb for CTAPSP = 10
111
Fixed chroma comb (bottom lines of line memory)
Fixed 4-line chroma comb for CTAPSP = 11
YCMP[2:0] Luma Comb Mode PAL, Address 0x39[2:0]
Table 50. YCMP Function
YCMP[2:0] Description
Configuration
0xx (default)
Adaptive comb mode.
Adaptive 5 lines (3 taps) luma comb
100
Disable luma comb
Use low-pass/notch filter; see the Y-Shaping Filter section
101
Fixed luma comb (top lines of line memory)
Fixed 3 lines (2 taps) luma comb
110
Fixed luma comb (all lines of line memory)
Fixed 5 lines (3 taps) luma comb
111
Fixed luma comb (bottom lines of line memory)
Fixed 3 lines (2 taps) luma comb
