參數(shù)資料
型號(hào)： ADV7189
廠商： Analog Devices, Inc.
英文描述： Multiformat SDTV Video Decoder
中文描述： 標(biāo)清多格式視頻解碼器
文件頁數(shù)： 39/104頁
文件大小： 890K
代理商： ADV7189
ADV7189
PAL Comb Filter Settings
Used for PAL-B/G/H/I/D, PAL-M, PAL-Combinational N, PAL-
60 and NTSC443 CVBS inputs
Rev. A | Page 39 of 104
PSFSEL[1:0] Split Filter Selection PAL (SDP),
Address 0x19, [1:0]
The NSFSEL[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 86. PSFSEL Function
PSFSEL[1:0]
00
01*
10
11
*Default value.
Description
Narrow
Medium
Wide
Widest
CTAPSP[1:0] Chroma Comb Taps PAL (SDP),
Address 0x39, [7:6]
Table 87. 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*
PAL chroma comb adapts 5 lines (5 taps) to
4 lines (4 taps); cancels cross luma and hue error
well.
*Default value.
CCMP[2:0] Chroma Comb Mode PAL (SDP), Address 0x39, [5:3]
Table 88. CCMP Function
CCMP[2:0]
Description
0xx*
Adaptive comb mode.
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.
100
101
Disable chroma comb.
Fixed chroma comb (top lines of line memory).
110
Fixed chroma comb (all lines of line memory).
111
Fixed chroma comb (bottom lines of line memory).
*Default value.
YCMP[2:0] Luma Comb Mode PAL (SDP), Address 0x39, [2:0]
Table 89. YCMP Function
YCMP[2:0]
Description
0xx*
Adaptive comb mode.
100
Disable luma comb.
Adaptive 5 lines (3 taps) luma comb.
Use low-pass/notch filter, see the Y Shaping Filter
section.
Fixed 3 lines (2 taps) luma comb.
Fixed 5 lines (3 taps) luma comb.
Fixed 3 lines (2 taps) luma comb.
101
110
111
*Default value.
Fixed luma comb (top lines of line memory).
Fixed luma comb (all lines of line memory).
Fixed luma comb (bottom lines of line memory).
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