adv7314 Analog Devices, Inc., adv7314 Datasheet - Page 55

• Manufacturer Part Number: adv7314
• Description: Multiformat 216 Mhz Video Encoder With Six Nsv 14-bit Dacs
• Manufacturer: Analog Devices, Inc.

SD ACTIVE VIDEO EDGE
[Subaddress 42h, Bit 7]
When the active video edge is enabled, the first three pixels and
the last three pixels of the active video on the luma channel are
scaled in such a way that maximum transitions on these pixels
are not possible. The scaling factors are ¥1/8, ¥1/2, ¥7/8. All
other active video passes through unprocessed.
REV. 0
VOLTS
VOLTS
100 IRE
–2
0
0 IRE
0.5
0.5
0
0
LUMA CHANNEL WITH
ACTIVE VIDEO EDGE
DISABLED
Figure 51. Example for Active Video Edge Functionality
IRE:FLT
IRE:FLT
0
100
–50
100
–50
50
50
0
0
2
Figure 52. Address 42h, Bit 7 = 0
Figure 53. Address 42h, Bit 7 = 1
2
4
4
–55–
6
87.5 IRE
12.5 IRE
100 IRE
50 IRE
SAV/EAV Step Edge Control
The ADV7314 can control fast rising and falling signals at the
start and end of active video to minimize ringing.
An algorithm monitors SAV and EAV and governs when the
edges are too fast. The result will be reduced ringing at the start
and end of active video for fast transitions.
Subaddress 42h, Bit 7 = 1 enables this feature.
0 IRE
6
F2
L135
F2
L135
LUMA CHANNEL WITH
ACTIVE VIDEO EDGE
ENABLED
8
8
10
10
12
12
ADV7314