the egress.
● If the user attempts to set a TMR and an ASI Input Reserve that does not allow enough
bandwidth for the locally encoded service (dependent on resolution and encoding modules)
the TMR will be auto calculated to allow for ASI Reserve and minimum value allowed for
locally encoded service
● TMR is currently capped at 150 Mb/s ASI. Input Reserve is currently capped at 100 Mb/s
**TMR and locally encoded services take priority over remuxed services. Therefore if TMR
is set to a rate that does not allow enough bandwidth for native encoding, then the ASI
Reserve setting will be truncated**
EN-XX ASI Remux with Manual PID Mapping
Terminology:
Transport Stream - A stream of 188-byte transport packets that contains audio, video and data
belonging to one (SPTS) or several (MPTS) programs.
PID - Packet Identifier. This unique integer value identifies elements in the transport stream
such as tables, data, or the audio for a specific program
PAT - Program Association Table. This MPEG-2 table lists all the programs contained in the
transport stream and shows the PID value for the PMT associated with each program. The PAT
is always found on PID 0x0000.
PMT - Program Map Table. This MPEG-2 table specifies PID values for components of
programs.
The Adtec EN-3X and EN-100 encoders have an ASI input available for the ASI remux feature.
Further information can be read about ASI Remux in the ASI Remux article. In some cases,
users may want to add custom PID’s from third party generators, such as a DVB Subtitles, into
the main video programming. With a custom application, the standard ASI remux feature would
not work without additional configuration. To keep the system open-ended and to allow any
type of special passthrough application, we have allowed the user to configure
any
type of PID
passthrough.
Some DVB Subtitle Generators do not generate MPEG Transport Stream Tables (PAT, PMT).
In order to associate DVB Subtitle PIDs with the desired program on the EN output, the encoder
PMT must be modified. A wiring diagram and sample PMT view can be seen in the drawing
below.
