ProMPEG FEC Support for IP Streaming
G.1
Introduction
The ProMPEG Forward Error Correction (FEC) scheme is designed to recover lost
or corrupted packets caused when transferring MPEG-2 transport streams, or newer
MPEG standards encapsulated as an MPEG-2 transport streams, over an IP
network.
The MX8400 supports ProMPEG FEC to the ProMPEG Code of Practice #3 release
2 standard on both input and output ports of the ProMPEG FEC option card.
FEC packets are generated for every column and
optionally
for every row. To
generate the FEC packets, RTP frames based on their sequence numbers are
arranged in a rectangle of dimensions D * L. The payload of the FEC packet
generated is the exclusive-OR of all RTP frames in the row/column it protects.
shows the arrangement of the RTP frames and the FEC packets that
protect them.
1
1
6
5
4
3
2
7
7
12
11
10
9
8
13
13
18
17
16
15
14
19
19
24
23
22
21
20
25
25
30
29
28
27
26
1
6
5
4
3
2
Co
L
umns (L)
Ro
ws (D)
Figure G.1 Columns and Rows
G.2
Configuration of ProMPEG FEC Inputs
If a transport stream is protected using ProMPEG FEC, and arrives at the input of
the MX8400 ProMPEG FEC card, then the FEC streams and their parameters are
automatically detected. Hence configuration of ProMPEG FEC inputs is not
required.
2/1553-FGC 101 1014 Uen B
G-3
Summary of Contents for MX8400
Page 1: ...MX8400 Multiplexer Software Version 5 2 0 and later REFERENCE GUIDE 2 1553 FGC 101 1014 Uen B...
Page 26: ...Installing and Powering Up 2 1553 FGC 101 1014 Uen B 2 4 BLANK...
Page 94: ...Operating the Multiplexer using nCompass Control 2 1553 FGC 101 1014 Uen B 4 18 BLANK...
Page 96: ...Preventive Maintenance and Fault finding 2 1553 FGC 101 1014 Uen B 5 2 BLANK...
Page 146: ...Technical Specification 2 1553 FGC 101 1014 Uen B B 20 BLANK...
Page 148: ...Static Parameters 2 1553 FGC 101 1014 Uen B C 2 BLANK...
Page 186: ...Redundancy Modes 2 1553 FGC 101 1014 Uen B E 2 BLANK...
Page 192: ...IP Protocols 2 1553 FGC 101 1014 Uen B F 2 BLANK...
Page 196: ...IP Protocols 2 1553 FGC 101 1014 Uen B F 6 Figure F 3 Editing Stack Download Ports...
Page 198: ...ProMPEG FEC Support for IP Streaming 2 1553 FGC 101 1014 Uen B G 2 BLANK...
Page 204: ...Setting up the SFN Functionality 2 1553 FGC 101 1014 Uen B H 2 BLANK...
Page 212: ...Setting up the SFN Functionality 2 1553 FGC 101 1014 Uen B H 10 BLANK...
Page 214: ...PSIG Support 2 1553 FGC 101 1014 Uen B I 2 BLANK...
Page 220: ...BISS Support 2 1553 FGC 101 1014 Uen B J 2 BLANK...