參數(shù)資料
型號(hào)： ADV7184BSTZ
廠商： Analog Devices Inc
文件頁數(shù)： 40/112頁
文件大小： 0K
描述： IC DECODER VID SDTV MULTI 80LQFP
標(biāo)準(zhǔn)包裝： 1
類型： 視頻解碼器
應(yīng)用： 投影儀，錄音機(jī)，安全
電壓 - 電源，模擬： 3.15 V ~ 3.45 V
電壓 - 電源，數(shù)字： 1.65 V ~ 2 V
安裝類型： 表面貼裝
封裝/外殼： 80-LQFP
供應(yīng)商設(shè)備封裝： 80-LQFP（14x14）
包裝： 托盤
ADV7184
Rev. A | Page 33 of 112
WYSFMOVR, Wideband Y-Shaping Filter Override,
Address 0x18 [7]
Setting the WYSFMOVR bit enables the use of the WYSFM [4:0]
settings for good quality video signals. For more information,
refer to the general discussion of the luma-shaping filters in the
Y-Shaping Filter section and the flowchart shown in Figure 15.
0—The best wideband Y-shaping filter for good quality video
signals is selected automatically.
1 (default)—Enables manual selection of a wideband filter via
WYSFM [4:0].
WYSFM [4:0], Wideband Y-Shaping Filter Mode,
Address 0x18 [4:0]
The WYSFM [4:0] bits allow the user to select a wideband
Y-shaping filter manually for good quality video signals, for
example, CVBS with a stable time base, a luma component of
YPrPb, or a luma component of Y/C. 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 37. WYSFM [4:0] Function
WYSFM [4:0]
Description
00000
Reserved; do not use
00001
Reserved; do not use
00010
SVHS 1
00011
SVHS 2
00100
SVHS 3
00101
SVHS 4
00110
SVHS 5
00111
SVHS 6
01000
SVHS 7
01001
SVHS 8
01010
SVHS 9
01011
SVHS 10
01100
SVHS 11
01101
SVHS 12
01110
SVHS 13
01111
SVHS 14
10000
SVHS 15
10001
SVHS 16
10010
SVHS 17
10011 (default)
SVHS 18 (CCIR 601)
10100 to 11111
Reserved; do not use
Figure 16 shows the filter responses of the SVHS 1 (narrowest)
to SVHS 18 (widest) shaping filter settings, Figure 18 shows the
PAL notch filter responses, and Figure 19 shows the NTSC notch
filter responses.
0
–10
–20
–30
–40
–50
–60
–70
01
8
6
4
21
054
79
-01
6
FREQUENCY (MHz)
COMBINED Y ANTIALIAS, S-VHS LOW-PASS FILTERS,
Y RESAMPLE
A
M
PL
IT
U
D
E
(
d
B
)
0
2
Figure 16. Y SVHS 1 to SVHS 18 Filter Responses
0
–20
–40
–60
–80
–100
–120
01
8
6
4
21
05
47
9-
0
17
FREQUENCY (MHz)
AM
P
L
IT
UDE
(
d
B
)
0
2
COMBINED Y ANTIALIAS, CCIR MODE SHAPING FILTER,
Y RESAMPLE
Figure 17. Y SVHS 18 Extra Wideband Filter (CCIR 601 Compliant)
0
–10
–20
–30
–40
–50
–60
–70
01
8
6
4
21
054
79
-01
8
FREQUENCY (MHz)
COMBINED Y ANTIALIAS, PAL NOTCH FILTERS,
Y RESAMPLE
A
M
PL
IT
U
D
E
(
d
B
)
0
2
Figure 18. Y PAL Notch Filter Responses
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