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ADV7183A
Table 185. Register 0x17
Rev. A | Page 78 of 104
Bit
4
0
Subaddress
0x17
Register
Shaping
Filter
Control
Bit Description
YSFM[4:0]
. Selects Y
Shaping Filter mode
when in CVBS only
mode. Allows the user to
select a wide range of
low-pass and notch
filters.
If either auto mode is
selected, the decoder
selects the optimum Y
filter depending on the
CVBS video source
quality (good vs. bad).
7
6
5
3
0
2
0
1
0
0
0
Register Setting
Auto wide notch for poor
quality sources or wide-
band filter with Comb for
good quality input
Auto narrow notch for poor
quality sources or wideband
filter with comb for good
quality input
SVHS 1
SVHS 2
SVHS 3
SVHS 4
SVHS 5
SVHS 6
SVHS 7
SVHS 8
SVHS 9
SVHS 10
SVHS 11
SVHS 12
SVHS 13
SVHS 14
SVHS 15
SVHS 16
SVHS 17
SVHS 18 (CCIR601)
PAL NN1
PAL NN2
PAL NN3
PAL WN 1
PAL WN 2
NTSC NN1
NTSC NN2
NTSC NN3
NTSC WN1
NTSC WN2
NTSC WN3
Reserved
Auto selection 15. MHz
Auto selection 2.17 MHz
SH1
SH2
SH3
SH4
SH5
Wideband mode
Comments
Decoder selects
optimum Y shaping
filter depending on
CVBS quality.
0
0
0
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
If one of these modes is
selected. The decoder
does not change filter
modes depending on
video quality, a fixed
filter response (the one
selected) is used for
good and bad quality
video.
Automatically selects a
C filter based on video
standard and quality.
CSFM[2:0]
. C Shaping
Filter mode allows the
selection from a range of
low-pass chrominance
filters.
If either auto mode is
selected, the decoder
selects the optimum C
filter depending on the
CVBS video source
quality (good vs. bad).
Non auto settings force a
C filter for all standards
and quality of CVBS
video.
Selects a C filter for all
video standards and for
good and bad video.