Analog Devices ADV7181B Manual page 27

AUTO SELECT LUMA
SHAPING FILTER TO
COMPLEMENT COMB
Table 29. YSFM Function
YSFM[4:0] Description
0'0000 Automatic selection including a wide notch
response (PAL/NTSC/SECAM)
0'0001 Automatic selection including a narrow notch
(default) response (PAL/NTSC/SECAM)
0'0010 SVHS 1
0'0011 SVHS 2
0'0100 SVHS 3
0'0101 SVHS 4
0'0110 SVHS 5
0'0111 SVHS 6
0'1000 SVHS 7
0'1001 SVHS 8
0'1010 SVHS 9
0'1011 SVHS 10
0'1100 SVHS 11
0'1101 SVHS 12
0'1110 SVHS 13
0'1111 SVHS 14
1'0000 SVHS 15
1'0001 SVHS 16
1'0010 SVHS 17
1'0011 SVHS 18 (CCIR 601)
1'0100 PAL NN 1
1'0101 PAL NN 2
1'0110 PAL NN 3
1'0111 PAL WN 1
1'1000 PAL WN 2
1'1001 NTSC NN 1
1'1010 NTSC NN 2
1'1011 NTSC NN 3
1'1100 NTSC WN 1
1'1101 NTSC WN 2
1'1110 NTSC WN 3
1'1111 Reserved
YES
VIDEO
QUALITY
BAD GOOD
WYSFMOVR
1
SELECT WIDEBAND
FILTER AS PER
WYSFM[4:0]
Figure 10. YSFM and WYSFM Control Flowchart
Rev. B | Page 27 of 100
SET YSFM
YSFM IN AUTO MODE?
NO
00000 OR 00001
USE YSFM SELECTED
FILTER REGARDLESS FOR
GOOD AND BAD VIDEO
0
SELECT AUTOMATIC
WIDEBAND FILTER
WYSFM[4:0] Wideband Y Shaping Filter Mode,
Address 0x18[4:0]
The WYSFM[4:0] bits allow the user to manually select a
shaping filter for good quality video signals, for example, CVBS
with stable time base, luma component of YPrPb, luma
component of YC. The WYSFM bits are active only if the
WYSFMOVR bit is set to 1. See the general discussion of the
shaping filter settings in the Y-Shaping Filter section.
Table 30. WYSFM Function
WYSFM[4:0]
0'0000
0'0001
0'0010
0'0011
0'0100
0'0101
0'0110
0'0111
0'1000
0'1001
0'1010
0'1011
0'1100
0'1101
0'1110
0'1111
1'0000
1'0001
1'0010
1'0011 (default)
1'0100 to 1'1111
ADV7181B
Description
Do not use
Do not use
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 (CCIR 601)
Do not use