Motorola APEX1000 Installation And Operation Manual page 151

PID Re-Mapping Options
PID Re-Mapping is enabled by default, and is used to prevent PID conflicts when
services are multiplexed together. PID Re-Mapping parameters are used at initialization
to determine how to partition the PMT, ECM, and elementary PIDs.
The APEX1000 uses a PID re-mapping scheme in which you can select from a number of
PID re-mapping options on an output transport stream basis. The output PID values for
PMTs and all components are then determined by the APEX1000.
Option Description
Disabled
Input PID values are simply re-used and are not re-mapped at the output. This setting should
NOT be used for VOD or SDV (Session Control) outputs.
Note: You are responsible for avoiding PID collisions.
Without Use this mode to allow the APEX to select all PMT, ECM, and component PID values. The
Reuse
APEX attempts to not reuse the same PMT, ECM, or component PID value until all PID
values reserved for these ranges have been exhausted. Note that the APEX ensures that all
PIDs on an output are unique, and prevents any PID conflicts by remapping all input to
output PIDs.
•
This mode is primarily required in VOD and SDV environments in which PID re-use is not
desired, to prevent the unintended receipt of switched services from previous sessions
that happened to use the same PID values
•
Additionally, this mode should be used when mapping multiple SPTS inputs to the same
output (such as in a VOD or SDV case)
The Program Based mode (as described below) is also intended for use in VOD systems.
Program Use the Program Based mode in VOD environments. This mode allows the APEX to pre-
Based
allocate the PMT, ECM, and component PIDs for each program using a specific program
mapping scheme. This scheme is based on the output program number to determine the
PID values for each program:
1 — PMT PID = (Program number + 1) * 16- 32, 48, 64, ..., 4096
2 — Component PIDs = (PMT PID+1), PMT+2, ... PMT+15. (Example: 33, 34, ... 47; 49,
50,... 63; 4097, 4098, ...4111)
3 — ECM PIDs = Allocated from the reserved range
This scheme only allows for output programs to be from 1 – 255. This is within the standard
range of program numbers for VOD systems. This format can also be used for SDV and even
broadcast systems, however, program numbers are limited to a maximum value of 255 and
the number of component PIDs for a program cannot exceed 15.
Configuration • Configuring QAM Ports
APEX1000 All-Purpose Edge QAM Software Version 2.4.x • Installation and Operation Manual
573408-001-a
PID Re-Mapping options
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