User's Manual

Chapter 12 IP Video Testing
Specifying test settings
SmartClass TPS User’s Guide
May 2014 22035456, Rev 001 99
4 On the Video Setup menu, select MOS Setup, and then specify the settings.
The following table describes the settings.
You are finished specifying test settings.
MPEG2-TS PID Timeout Enter the PID Timeout.
This is the amount of time to wait for a PID that has been declared as
having video or audio data for traffic, since the last traffic was
received. If this threshold is violated, then the PID Timeout result will
increment.
MPEG2-TS PAT/PMT Time-
out
Enter the PAT/PMT Timeout.
This is the amount of time to wait after the last received PAT or PMT
packet before declaring a timeout condition (which would then incre-
ment the PAT Errors or PMT Errors statistics)
RTP Loss Distance Enter the Loss Distance threshold, in number of packets.
This triggers when RTP losses cause a RTP LD Error.
“Loss Distance” measures the difference in sequence numbers of
two loss events, with a “loss event” being the loss of one or more
packets in a row. So for the following stream (1 x 3 4 5 x x 8 9 10) the
loss distance between the two events is 4. If the loss distance is less
than the configured threshold, then the “Loss Distance Error” statistic
will increment.
RTP Loss Period Enter the Loss Period threshold, in number of packets.
This triggers when RTP losses cause a RTP LP Error.
“Loss period” is the length of a single loss event, that is, the number
of lost packets between two successfully received packets. So for the
following example stream (1xxx567xx10x12), there are three
loss periods, with lengths of 3, 2, and 1.
Setting Description
NOTE:
When MOS Support is enabled, analysis is limited to one stream.
Setting Description
MOS Support Specify whether MOS Support is enabled or disabled.
ISMA Video Type Specify the type of video codec used for analysis of ISMA streams.
ISMA Audio Type Specify the type of video codec used for analysis of ISMA streams.