Network Electronics ASA ASI-IP-GTW, Руководство пользователя

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ASI-IP-GTW User's Manual
Page 42
3.6.2 FEC Settings
Figure 17. IP TX FEC page
This sub-page will only appear if the unit is enabled with FEC.
FEC Mode:
Select "No FEC" to not calculate and send any FEC data.
Select "Column only" to calculate and send one-dimensional FEC data.
Select "Column and Row" to calculate and send two-dimensional FEC
data.
Number of columns (L):
Enter number of columns.
Number of rows (D):
Enter number of rows.
Note:
Please note that the maximum matrix size is 256 (L*D) and
that D is in the range 4 ≤ D ≤ 32. In column only mode L is in the
range 1 ≤ L ≤ 32, while in column and row mode 4 ≤ L ≤ 32. L+D can
not exceed 32.
Note:
Please note that FEC column packets are transmitted on UDP
port n+2 and FEC row packets are transmitted on UDP port n+4
where n is the UDP port of the media data. This is in accordance
with Pro-MPEG CoP 3.
Skew:
Controls whether to organize the column FEC with or without
skew. When enabling skew, the delay required on the receiver is less
than when transmitting straight columns.
FEC overhead:
This number is the overhead in percent caused by the
current FEC configuration.