參數(shù)資料
型號： EVAL-ADV7391EBZ
廠商： Analog Devices Inc
文件頁數(shù)： 67/108頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR ADV7391 ENCODER
標準包裝： 1
系列： Advantiv®
主要目的： 視頻，視頻編碼器
已用 IC / 零件： ADV7391
已供物品： 板
相關(guān)產(chǎn)品： ADV7391BCPZ-REEL-ND - IC VIDEO ENCODER SD/HD 32-LFCSP
ADV7391BCPZ-ND - IC ENCODER VIDEO W/DAC 32LFCSP
Data Sheet
ADV7390/ADV7391/ADV7392/ADV7393
Rev. G | Page 61 of 108
Figure 73. ED/HD Sharpness and Adaptive Filter Control
Block
Figure 74. ED/HD Sharpness Filter Control with Different Gain Settings for ED/HD Sharpness Filter Gain Values
ED/HD SHARPNESS FILTER AND ADAPTIVE FILTER
APPLICATION EXAMPLES
Sharpness Filter Application
The ED/HD sharpness filter can be used to enhance or
attenuate the Y video output signal. The register settings in
Table 51 are used to achieve the results shown in Figure 74.
Input data is generated by an external signal source.
Table 51. ED/HD Sharpness Control Settings for Figure 74
Subaddress
Register Setting
Reference1
0x00
0xFC
0x01
0x10
0x02
0x20
0x30
0x00
0x31
0x81
0x40
0x00
a
0x40
0x08
b
0x40
0x04
c
0x40
d
0x40
0x80
e
0x40
0x22
f
1
Adaptive Filter Control Application
The register settings in Table 52 are used to obtain the results
shown in Figure 76, that is, to remove the ringing on the input
Y signal, as shown in Figure 75. Input data is generated by an
external signal source.
Table 52. Register Settings for Figure 76
Subaddress
Register Setting
0x00
0xFC
0x01
0x38
0x02
0x20
0x30
0x00
0x31
0x81
0x35
0x80
0x40
0x00
0x58
0xAC
0x59
0x9A
0x5A
0x88
0x5B
0x28
0x5C
0x3F
0x5D
0x64
FREQUENCY (MHz)
FILTER A RESPONSE (Gain Ka)
M
AG
NI
T
UDE
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
FREQUENCY (MHz)
FILTER B RESPONSE (Gain Kb)
M
AG
NI
T
UDE
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
FREQUENCY (MHz)
M
AG
NI
T
UDE
RE
S
P
O
NS
E
(
L
in
ear
S
cal
e)
1.0
1.1
1.2
1.3
1.4
1.5
1.6
10
12
INPUT
SIGNAL
STEP
FREQUENCY RESPONSE IN SHARPNESS
FILTER MODE WITH Ka = 3 AND Kb = 7
SHARPNESS AND ADAPTIVE FILTER CONTROL BLOCK
0
2
4
6
8
06234-
074
f
e
d
a
b
c
1
R4
R2
CH1 500mV
M 4.00s
CH1
ALL FIELDS
REF A
500mV 4.00s
1
R2
R1
1
CH1 500mV
M 4.00s
CH1
ALL FIELDS
REF A
500mV 4.00s
1
9.99978ms
06234-
075
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