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Page 3-16 Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder
ST.TM.E10076.3
3.6.5 Using the Remultiplexer
Set the output bit-rate to the required value in the Setup/Mux Menu.
Connect transport streams that are to be combined (remultiplexed) with
the host Encoder’s services to the ASI inputs on the rear of the unit.
NOTE…
It is possible to remultiplex any DVB or ATSC compliant transport stream but at the time of publication,
only transport streams generated by TANDBERG Television equipment are guaranteed to work when
fed to the Remultiplexing module.
The equipment will automatically detect the services on these inputs. The
list of detected services is displayed in the Setup/Mux Menu.
Each service can be individually switched ‘Off’, ‘On’, or ‘On with
scrambling’. If the service is set to ‘Off’, then there is no trace of the
service in the output transport stream. Each new service defaults to ‘Off’,
unless it was connected to the Remultiplexer the last time the Encoder was
powered, when it assumes its previous state.
It is possible to remultiplex transport streams that have already been
scrambled by BISS encryption, but it is not possible to remultiplex
transport streams that have already been scrambled using RAS encryption.
Also it is not possible to scramble a service that has already been
scrambled.
3.6.6 ATSC Remultiplexing
The Remultiplexer can work with ATSC compliant transport streams. It
remaps the services following the ATSC program paradigm.
The Encoder can be configured to generate the PSIP for the output
transport stream. It generates the minimum number of tables to give an
ATSC compliant output transport stream, i.e. Event Information Tables
(EIT) 0, 1, 2 and 3, the System Time Table (STT), the Rating Region Table
(RRT), the Master Guide Table (MGT), and either the Cable Virtual Channel
Table (CVCT) or the Terrestrial Virtual Channel Table (TVCT), depending on
the delivery descriptor set. It will not pass through any tables that are
present on the ASI input transport streams.
Alternatively, an external PSIP generator can be connected to one of the
Remultiplexer inputs and the remultiplexer programmed to pass through a
range of PIDs, thus inserting the PSIP into the output transport stream.
For more information about using the Remux card in ATSC with internal
and external PSIP see Annex J, Use of Remux Card in ATSC.
3.6.7 Setting Bit-rates and Avoiding Overflow
Overflow is the condition in which the total of the contributing service
bit-rates, (including the host mux), exceeds the output bit-rate of the
primary remultiplexing unit.
NOTE…
Only useful packets (e.g. video, audio and data, etc) count towards the bit-rate of the contributing
service bit-rates, not null packets.