IPTV Result Video (Page #2) -
displays the
Stream Rate
results;
Table provides individual bit rate statistics for each stream;
Total is the total number of bytes related to the Video, Audio and Data payloads
Video is the number of packets classified as video packets
Audio is the number of packets classified as audio packets
Data is the number of packets classified as data packets
Other is the number of packets classified as unknown packets
IPTV Video Stream Rates
IPTV Result Video (Page #3) -
displays the
Packet Jitter
results;
Packet Jitter displayed in milliseconds.
Current is the current jitter value
Max is the maximum jitter value
IPTV Video Stream Packet Jitter
IPTV and Packet Jitter
Packet Jitter measurement is based on the packet inter-
arrival time which is a measure of packet arrival
variance.
Packet jitter affects packet arrival throughout the entire
network and variations lead to buffer under / overflows
at the receiving equipment e.g. STB.
Jitter impacts the way packets are handled at various
net work elements i.e. If the jitter is too high, packet
loss will increase as queuing software tries to load
balance traffic at network elements.
Packet jitter should not be confused with PCR jitter.
When Packet jitter is present, the cause is normally
related to the Ethernet physical layer.
When PCR jitter is present, then the cause is most
likely related to the program flow and could be related
to an encoder not performing to specification.
MX100/120 e-Manual D07-00-004 Rev A04
Page 95 of 115
