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ADV7344BSTZ Datasheet(PDF) 62 Page - Analog Devices

Part # ADV7344BSTZ
Description  Multiformat Video Encoder Six 14-Bit Noise Shaped Video DACs
PDF  88 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADV7344BSTZ Datasheet(HTML) 62 Page - Analog Devices

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ADV7344
Rev. 0 | Page 62 of 88
SD ACTIVE VIDEO EDGE CONTROL
Subaddress 0x82, Bit 7
The ADV7344 is able to control fast rising and falling signals at
the start and end of active video in order to minimize ringing.
When the active video edge control feature is enabled
(Subaddress 0x82, Bit 7 = 1), the first three pixels and the last
three pixels of the active video on the luma channel are scaled
so that maximum transitions on these pixels are not possible.
At the start of active video, the first three pixels are multiplied
by 1/8, 1/2, and 7/8, respectively. Approaching the end of active
video, the last three pixels are multiplied by 7/8, 1/2, and 1/8,
respectively. All other active video pixels pass through
unprocessed.
100 IRE
0 IRE
100 IRE
12.5 IRE
87.5 IRE
0 IRE
50 IRE
LUMA CHANNEL WITH
ACTIVE VIDEO EDGE
DISABLED
LUMA CHANNEL WITH
ACTIVE VIDEO EDGE
ENABLED
Figure 81. Example of Active Video Edge Functionality
VOLTS
024
F2
L135
68
10
12
IRE:FLT
–50
0
0
50
100
0.5
Figure 82. Example of Video Output with Subaddress 0x82, Bit 7 = 0
VOLTS
02
–2
4
6
8
10
12
F2
L135
IRE:FLT
–50
0
50
100
0
0.5
Figure 83. Example of Video Output with Subaddress 0x82, Bit 7 = 1



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