Adaptive rate control for real-time packet audio based on loss prediction

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.