Packet audio playout delay adjustment: performance bounds and algorithms
Multimedia Systems
Delay jitter bounds and packet scale rate guarantee for expedited forwarding
IEEE/ACM Transactions on Networking (TON)
An Algorithm for Playout of Packet Voice Based on Adaptive Adjustment of Talkspurt Silence Periods
LCN '99 Proceedings of the 24th Annual IEEE Conference on Local Computer Networks
IEEE Internet Computing
Intrastream synchronization for continuous media streams: a survey of playout schedulers
IEEE Network: The Magazine of Global Internetworking
Asymmetric model for active measurements in the internet
Proceedings of the 2nd international conference on Ubiquitous information management and communication
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Adaptive playout algorithms have become popular to calculate playout times of VoIP packets on the Internet. In such algorithms, VoIP application peers readjust their playout schedules on a per-talkspurt basis. In this article, we propose a per-call basis playout algorithm that uses the same playout delays for an entire call, adapted according to the network delay value received from the gatekeeper. Our per-call basis algorithm operates by switching between fixed playout (keeping playout delay fixed to the low bound level for domestic calls) or call-adaptive playout for other calls. To compare the performance of our new playout algorithm to the basic per-talkspurt algorithm, we obtained experimental network delay data, which were used as an input signal for virtual playout. Our results indicate that our algorithm achieves significant reductions in lateness loss rates after requiring only a very small increase in the playout delay.