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ADV7393 bảng dữ liệu(PDF) 56 Page - Analog Devices

tên linh kiện ADV7393
Giải thích chi tiết về linh kiện  Low Power, Chip Scale 10-Bit SD/HD Video Encoder
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ADV7393 bảng dữ liệu(HTML) 56 Page - Analog Devices

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ADV7390/ADV7391/ADV7392/ADV7393
Rev. 0 | Page 56 of 96
f
e
d
a
b
c
1
R4
R2
CH1 500mV
M 4.00µs
CH1
ALL FIELDS
REF A
500mV 4.00µs
1
R2
R1
1
CH1 500mV
M 4.00µs
CH1
ALL FIELDS
REF A
500mV 4.00µs
1
9.99978ms
9.99978ms
Figure 75. 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 46 were used to achieve the results shown in Figure 75.
Input data was generated by an external signal source.
Table 46. ED/HD Sharpness Control
Subaddress
Register Setting
Reference1
0x00
0xFC
0x01
0x10
0x02
0x20
0x30
0x00
0x31
0x81
0x40
0x00
a
0x40
0x08
b
0x40
0x04
c
0x40
0x40
d
0x40
0x80
e
0x40
0x22
f
1 See Figure 75.
Adaptive Filter Control Application
The register settings in Table 47 are used to obtain the results
shown in Figure 77, that is, to remove the ringing on the input
Y signal, as shown in Figure 76. Input data is generated by an
external signal source.
Table 47. Register Settings for Figure 77
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



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