Chapter 4 Table-Based Video Specific Operation
92
78-4025112-01 Rev H0
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:
Содержание RF Gateway 1 Modules
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Страница 10: ...Contents viii 78 4025112 01 Rev H0 Electrical GbE SFP Transceiver 254 Glossary 255 Index 259 ...
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Страница 156: ...Chapter 8 M CMTS Data DEPI CP Operation 132 78 4025112 01 Rev H0 Result Input monitoring is shown for each GbE port ...
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