A Garch-Based Adaptive Playout Delay Algorithm for VoIP
Network delay, packet loss and network delay variability (jitter) are important factors that impact on perceived voice quality in VoIP networks. An adaptive playout buffer is used in a VoIP terminal to overcome jitter. Such a buffer-control must operate a trade-off between the buffer-induced delay and any additional packet loss rate. In this paper, a Garch-based adaptive playout algorithm is proposed which is capable of operating in both inter-talk-spurt and intra-talk-spurt modes. The proposed new model is based on a Garch model approach; an ARMA model is used to model changes in the mean and the variance.