Vega 30 Router User Manual
Input Signal Timing Use Cases
Output Video Timing - Line Sync and Offset 8.3
Issue1 Revision 1
Page 159
© 2017 SAM
8.3.3 Timing Case 3)
Input Arriving some Pixels Later than Reference
Figure 121 Vega 30 Video Input Timing Cases and the Reference Offset Control:
Timing Case 3) Input Later than Reference
Input late compared to ref,
Negative
Reference Offset
value
Output with added delay
Video Input Signal
Timing
Offset
Setting
Reference
Offset
value shown
(see Figure
Comments
Reference Offset
Video Output
Signal Timing
(with respect to
reference)
Video Buffer Storage
(Pixels)
(Pixels)
(Pixels)
Case 3) Input Later than
Reference
•
Set Offset to 0.
0
minus A
Reference Offset
a negative number.
Need to add an Offset.
•
Add an offset of +A pixels to account
for late-arriving input:
+A
(-A +A) = 0
Output is late by
A pixels.
No storage consumed.
•
Introduce a further
offset of B pixels:
A+B
B
Output is late by
(A+B) pixels.
Storage used to delay
output by B pixels.
Table 54 Timing Case 3)
