Tech-X Flex™
Base Unit User Guide Issue 1
5: IP and Video Testing
5-19
Intro
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OOS Pkt Rate
Number of video/audio stream packets that arrived out of sequence, as detected
by the jitter buffer emulator.
Burst Loss Rate
Average percentage of media independent units (MIUs) lost and/or discarded
during burst periods.
NOTE:
For further information about bursts and gaps, see
Burst Length
Average burst period length in milliseconds.
Gap Loss Rate
Average percentage of media independent units (MIUs) lost and/or discarded
during gap periods.
Gap Length
Average gap period length in milliseconds.
Table 5-14 Video QoS - Transport results, MPEG Stats tab
Result
Description
MPEG Sync Loss
Number of times that the sync byte of a packet header was errored or not present
for two consecutive transport stream packets.
MPEG Sync Byte
Err
Number of times that a transport stream sync byte did not appear following a 188-
byte or 204-byte transport stream packet.
MPEG Cont Err
Number of times that the continuity count of a received packet did not increment
by one, as compared to the previous packet. The continuity count is a 4-bit field in
the packet header that increments from 0 - 15 for each transmitted packet,
resetting at zero as necessary. Continuity count errors are normally caused by lost
or out-of-sequence packets.
MPEG Trnspt Err
Number of packets that indicated a transport error, by means of the transport error
bit in the packet header. The transport error bit is set to "1" when at least one
uncorrectable bit error exists in the packet.
Table 5-13 Video QoS - Transport results, Stream Metrics tab
Result
Description
