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ADV7342 数据表(PDF) 59 Page - Analog Devices

部件名 ADV7342
功能描述  Multiformat Video Encoder Six, 11-Bit, 297 MHz DACs
PDF  88 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADV7342 数据表(HTML) 59 Page - Analog Devices

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ADV7342/ADV7343
Rev. 0 | Page 59 of 88
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 73. 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 47 were used to achieve the results shown in Figure 73.
Input data was generated by an external signal source.
Table 47. 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 73.
Adaptive Filter Control Application
The register settings in Table 48 are used to obtain the results
shown in Figure 75, that is, to remove the ringing on the input
Y signal, as shown in Figure 74. Input data is generated by an
external signal source.
Table 48. Register Settings for Figure 75
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
Figure 74. Input Signal to ED/HD Adaptive Filter
Figure 75. Output Signal from ED/HD Adaptive Filter (Mode A)



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