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Using the remultiplexer, Atsc remultiplexing, Setting bit-rates and avoiding overflow – TANDBERG E5714 User Manual

Page 66: 5 using the remultiplexer, 6 atsc remultiplexing, 7 setting bit-rates and avoiding overflow

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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.

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