Operating the Multiplexer using nCompass Control
Table 4.4 Suggested Bit rates for Various Programme Types (Mbps)
Resolution
(pixels)
Sport News Film General
704 x 576
6.0 - 8.0
4.0 - 6.0
3.0 - 5.0
5.0 - 7.0
352 x 576
3.0 - 6.0
2.0 - 3.0
1.5 - 2.5
2.5 - 3.5
352 x 288
2.0 - 3.0
1.5 - 2.5
1.0 - 2.0
1.5 - 3.0
An example of a bit rate allocation is given in
the quality on each channel and adjust the bit rate allocation.
Table 4.5 Typical Bit rate Allocations
Encoder Resolution
(pixels)
Programme
Type
Allocated Bit
rate (Mbps)
1
704 x 576
Sport Channel
6.0
2
352 x 576
Sport Channel
4.0
3
352 x 576
News Channel
3.0
4
352 x 576
Film Channel
2.0
TOTAL:
15.0
The more Encoders there are in a group, the more potential there is to reduce the
group bit rate, although this may have to be modified in the light of any
remultiplexing further downstream.
4.5.5.3
Weighting Factor
A weighting factor can be assigned to each Encoder in a group to create a bias to
that channel. In the example above, Encoder 1 can be given priority thus ensuring
higher picture quality in the event of a conflict. If no bias is required, the weighting
factor should be set to the same value.
Table 4.6 Example of Weighting Factor Allocation
Encoder Resolution
(pixels)
Target Picture
Quality
Average Bit rate
(Mbps)
1
704 x 576
95
6.0
2
352 x 576
80
4.0
3
352 x 576
80
3.0
4
352 x 576
80
2.0
TOTAL:
15.0
2/1553-FGC 101 1014 Uen B
4-9
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...