ADV7181 AD [Analog Devices], ADV7181 Datasheet - Page 75

• Manufacturer Part Number: ADV7181
• Description: Multiformat SDTV Video Decoder
• Manufacturer: AD [Analog Devices]

Subaddress
0x15
0x17
Register
Digital
Clamp
Control 1
Shaping
Filter
Control
Bit Description
Reserved
DCT[1:0]. Digital clamp timing
determines the time constant of the
digital fine clamp circuitry.
Reserved
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).
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.
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Bits
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Comments
Set to default
Set to default
quality sources or wide-
band filter with Comb for
good quality input
poor quality sources or
wideband filter with comb
for good quality input
Auto selection 2.17 MHz
Slow (TC = 1 s)
Medium (TC = 0.5 s)
Fast (TC = 0.1 s)
TC dependent on video
Auto wide notch for poor
Auto narrow notch for
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
SH1
SH2
SH3
SH4
SH5
Wideband mode
Notes
Decoder selects
optimum Y shaping
filter depending on
CVBS quality.
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.
Selects a C filter for
all video standards
and for good and
bad video.
ADV7181B