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Chapter 4 Table-Based Video Specific Operation
Notes:
We recommend a setting of From PMT.
More than 1 PID in a service may have PCR timestamps. If From PMT is
selected, the RF Gateway 1 ignores all PCR timestamps except the PID
specified in the PMT as the PCR PID. If First Detected is selected, the RF
Gateway 1 determines the PCR reference PID by whichever PID it first
receives a PCR timestamp on.
8
In the MPTS Dejitter field, the user can choose the following mode for MPTS
Dejitter:
One Stream
Break Into SPTS
The Ref is 0
Notes:
If you have a stat-muxed stream, we recommend a setting of One Stream.
The Ref field specifies the service to use as program clock reference for the
MPTS. Normally, this field has a value of 0 which indicates the system will
use the PCR reference of the first PID received with a PCR timestamp.
An MPTS stream consists of multiple programs with each program having its
own embedded PCR reference. For stat-muxed CBR MPTS streams, any of
the PCR references may be used to properly dejitter the entire MPTS.
However, if the MPTS is not CBR, the PCR in a program should only be used
for dejittering that program. Therefore, the RF Gateway 1 supports splitting
an MPTS into individual programs and dejittering each individually with its
own PCR reference.
When creating an MPTS entry in the RF Gateway 1 Stream Map Table, it is
very important that the Advanced Setting of MPTS Dejitter is set correctly. If
the incoming MPTS stream has been created by a stat-mux device and has a
Constant-Bit Rate (CBR) envelope, the dejitter mode setting should be set to
"One Stream". This setting keeps the stat-muxing intact and passes the CBR
stream to the output. However, if the incoming MPTS is not stat-muxed and
is simply rate-limited or rate-clamped, or if it is just a mux of VBR programs,
the dejitter mode must be set to "Break Into SPTS". The "Break Into SPTS"
setting dejitters each program in the MPTS individually based on their own
PCR.
9
In the Blocked PIDS field, the user can enter PMT PIDs of programs you want to
block. The RF Gateway 1 does not support blocking individual audio or video.
The stuffing PID is 8191.
Note:
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