Nevion FSR-HD - Manual (Page 10)

FRS-HD Rev. G
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that the incoming video is iso-synchronous, but that it lags 20 lines after the sync. We
will then have the situation shown in Figure 6.
Note that the numbers in circles in the next figures are visualizing the video frames.
Figure 6: Example of delayed outgoing video
To match larger processing delays, one will want to first delay the incoming video, and
then synchronize the video. This is equivalent to introducing a delay line for the incoming
video, and then synchronize the output of the delay line with sync. In effect, one moves
the delay-window start; this is equivalent with setting of the video delay to a larger value.
Let us assume that the video delay is set to 2 frames, 200 lines. In that case the outgoing
video will be between 2 frames + 200 lines and 3 frames + 200 lines delayed with respect
to the incoming video. For convenience, let us assume that the incoming video is iso-
synchronous, but that it lags 25 lines after the sync. Let us also assume that the phase
delay is set to -60 samples. We will then have the situation shown in Figure 7.