T-VIPS CP525 cMux, Руководство пользователя

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WEB Interface 235
ID: um_tsmux CP525 cMux User’s Manual Rev. 5.20.12 (3944)
8.7.4.2 FEC
This page allows configuring and applying forward error correction data to the output IP trans-
port stream.
Figure 8.141 IP output FEC page
In the FEC Configuration field forward error correction is enabled and configured for each
individual output:
FEC mode
From the pull-down list select
Disabled
to not apply FEC,
Column only
to apply one-
dimensional FEC (i.e. add column FEC datagrams, only), or Column and Row to apply
two-dimensional FEC (i.e. add column and row FEC datagrams).
FEC overhead
Gives an instant check of the overhead resulting from the applied FEC.
Resulting total rate
Shows the actual bit rate of the IP stream including FEC, if applied.
The Common FEC Configuration field allows setting of common parameters that will be applied
to the FEC processor in general:
Number of columns (L)
The number of columns used in generating the Row FEC data.
Number of rows (D)
The number of rows used in generating the
Column
FEC data.
Skew
Check this box to enable a skewed FEC matrix.
For a detailed description of FEC usage, refer to Appendix B .
The Status field shows the IP status resulting from adding FEC processing:
Group Ethernet rate
The bitrate of the IP frames containing this MPEG-2 transport stream and any FEC data
related to this stream.
Data Ethernet rate
The bitrate of the MPEG-2 transport stream contained in the IP stream.