VBrick 9000 Admin Manual page 94

Field
Enable FEC
Number of FEC
Columns (L)
Number of FEC
Rows (D)
FEC Arrangement
Block Aligned
86
Description
Use to enable Forward Error Correction for streams with a Transport
Type of MPEG2TS. Default = disabled.
Range = 1–50. Default = 10. For Constant bit rate Mode, this value
must be less than or equal to 20. For Variable bit rate Mode, this value
must be less than or equal to 50. If FEC is enabled for this stream, you
can configure the interval at which FEC packets will be sent on FEC
Stream 2. In addition, it dictates whether or not FEC stream 2 can be
enabled at the transmitter level. This setting must be greater than or
equal to 4 in order for FEC Stream 2 to be enabled.
Range = 1–50. Default = 10. For a Constant bit rate, this value must
be less than or equal to 20. For a Variable bit rate, this value must be
less than or equal to 50. If FEC is enabled for this stream, you can
configure the length of the burst packet loss that this stream will be
FEC-protected from. It also it dictates the interval at which FEC
Stream 1 packets will be transmitted. For example, if FEC
Arrangement Block Aligned is enabled, an FEC Stream 1 packet will
be transmitted at an interval roughly equal to once for every Number
of FEC Rows packets in each configured column in the FEC matrix.
Note: If the stream is configured for a Variable bit rate Mode, the
product of FEC Rows * FEC Columns must be less than or equal to
256. If the stream is configured for a Constant bit rate Mode the
product of FEC Rows * FEC Columns must be less than or equal to
100.
Specifies when the FEC Stream 1 packets are transmitted. Default =
Enabled.
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