ADV7181B
Rev. B | Page 27 of 100
AUTO SELECT LUMA
SHAPING FILTER TO
COMPLEMENT COMB
SET YSFM
YSFM IN AUTO MODE?
00000 OR 00001
VIDEO
QUALITY
BAD
GOOD
SELECT WIDEBAND
FILTER AS PER
WYSFM[4:0]
SELECT AUTOMATIC
WIDEBAND FILTER
WYSFMOVR
1
0
USE YSFM SELECTED
FILTER REGARDLESS FOR
GOOD AND BAD VIDEO
YES
NO
04984-010
Figure 10. YSFM and WYSFM Control Flowchart
Table 29. YSFM Function
YSFM[4:0] Description
0'0000
Automatic selection including a wide notch
response (PAL/NTSC/SECAM)
0'0001
(default)
Automatic selection including a narrow notch
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
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] Description
0'0000
Do not use
0'0001
Do not use
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 (default)
SVHS 18 (CCIR 601)
1'0100 to 1’1111
Do not use
