Adaptive delay concealment for Internet voice applications with packet based time-scale modification

For Internet audio applications, much eort has been involved in packet-level error control and delay jitter conceal-ment. In this paper, a packet-based time-scale modication scheme for speech signal is applied to provide adaptive delay concealment at the receiver of an Internet voice session. The adaptive playout algorithm strives to minimize receiver packet droppings for late-arrival packets and premature packets while keeping the end-to-end delay con-strained. By stretching the voice segment up/down and incorporating the silence interval, the proposed algorithm could adapt quickly to accommodate uctuating delays including delay spikes. The evaluation veries the perfor-mance of the proposed adaptive playout, which improves the received speech intelligence under a tightly bounded average playout delay