Cobalt Digital COMPASS 9223 Dual-Channel 3G_HD_SD MPEG-4 Encoder User Manual
Page 69
69
9223-OM (V2.0)
•
SMPTE 2022 FEC: Check this box to enable transmission of SMPTE 2022 FEC packets
for this stream.
Once the SMPTE 2022 FEC box is checked, additional parameters become available for
configuration:
•
FEC Mode: If you select Column Only, the 9223 will send a single FEC flow,
corresponding to the column protection data, using a UDP port number corresponding to
the media UDP port number plus 2. If you select Row and Column, the 9223 will send
two FEC flows, the first corresponding to the column protection data, and the second
corresponding to the row protection data. The row protection data will be sent using a
UDP port number corresponding to the media UDP port number plus 4. Note that not all
receivers support Row and Column mode; such receivers will only use the FEC Column
data and discard the FEC Row data.
•
Columns: Number of columns in the FEC matrix. This variable must be between 1 and
20 if FEC Mode is set to Column Only, and between 4 and 20 if it is set to Row and
Column.
•
Rows: Number of rows in the FEC matrix. This variable must be between 4 and 20.
•
FEC Overhead: This field is updated as configuration is entered, and contains the
overhead for the selected FEC configuration. Note that not all parameter changes cause
the overhead to change. The FEC overhead is the sum of a Column overhead and a Row