Raake, A.
Short- and Long-term Packet Loss Behavior: Towards Speech Quality Prediction for Arbitrary Loss Distributions
IEEE Trans. Audio, Speech and Language Proc., 14(6), 1957-1968.
Abstract
A speech-quality-oriented classification of packet
loss distributions is proposed according to both the shortand
long-term loss behavior. While the short-term behavior
(microscopic loss behavior) relates to the effect of packet loss on
the coder and packet loss concealment performance, the longterm
loss behavior (macroscopic loss behavior) is defined so that
it reflects the loss behavior that ultimately leads to speech quality
that perceptively changes over time. Based on this classification,
different parametric (objective) modeling approaches for predicting
speech quality are discussed. To this aim, a packet loss
averaging approach is presented for modeling speech quality
under short-term loss. Starting from this model, two different
ways for predicting speech quality under long-term-dependent
packet loss are analyzed and compared to auditory (subjective)
test results: quality prediction based on the averaging at packet
trace level as provided e.g. by the E-model [1], and the prediction
based on the time-averaging of estimated instantaneous quality
profiles, as suggested e.g. by [2]–[4]. From this comparison,
the suitability of the different approaches for network planning
are discussed, and their limitations in case of particular loss
distributions are pointed out.
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