Specifications

hg-09.fm
A31003-H3580-M103-2-76A9, 01-2009
HiPath 3000/5000 V8 - HG 1500 V8, Administrator Documentation
9-21
Nur für den internen Gebrauch
Technical Concepts
Static and Adaptive Jitter Buffer
IP packets are stored in the jitter buffer in the sequence of arrival. Each packet bears a times-
tamp saved in the packet’s RTP header. These timestamps are used to determine the correct
sequence. The jitter buffer ensures that the packets exit in the correct sequence and in real
time. The average time (average delay) defines how long packets that arrive at the anticipated
time remain in the jitter buffer. Packets that arrive later than anticipated remain in the jitter buffer
for a correspondingly shorter length of time; packets that arrive sooner than anticipated remain
longer in the jitter buffer. If a packet arrives too late to be placed in the correct sequence, it is
lost. Theoretically, packets can also arrive too early to be placed in the correct sequence. This
rarely happens, however, in practice.