| | |
Summary: Adaptive Rate Control for Real-time Packet Audio
Based on Loss Prediction
Lopamudra Roychoudhuri and Ehab S. Al-Shaer
School of Computer Science, Telecommunications and Information Systems
DePaul University
Chicago, Illinois 60604
Email: {lroychou,ehab}@cs.depaul.edu
Abstract-- This paper presents an Adaptive Rate Control
Framework, which performs proactive rate control based on
packet loss prediction and on-line audio quality assessment for
real-time packet audio. The proposed framework determines the
optimal combination of various audio codecs for transmission,
utilizing a thorough analysis of audio quality based on individual
codec characteristics, as opposed to ad-hoc codec redundancy
used by other approaches. As a main component of this frame-
work, this paper shows a preliminary formulation of the Packet
Loss Predictor, that determines the likelihood of packet loss in
terms of available bandwidth, delay variation trend, and network
history. We present simulation and experiment results to show
the accuracy and efficiency of this technique.
|
