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Voice over application-level multicast

Blundell, N. and Egi, N. and Mathy, L. (2006) Voice over application-level multicast. In: Proceedings of the 25th IEEE International Performance Computing and Communications Conference, IPCCC 2006,. IEEE, pp. 674-680. ISBN 1-4244-0198-4

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Abstract

In this paper, we present a thorough and realistic analysis of voice (i.e. audio conferencing) over application-level multicast (ALM). Through flexibility and ease-of-deployment, ALM is a compelling alternative group-communication technique to IP multicast-which has yet to see wide-scale deployment in the Internet. However, proposed ALM techniques suffer from inherent latency inefficiencies, which we show, through realistic simulation and exploration of perceived quality in multi-party conversation, to be greatly problematic for the realisation of truly-scalable audio-conferencing systems over ALM. By incorporating talkspurt data from a large and detailed corpus of multi-party conversation, and through using network-simulation techniques based on actual Internet latency measurements, we develop our previous work on the application-level network audio-conferencing (ALNAC) routing protocol into a thorough analysis of the problem, leading to a novel model for assessing the perceptual quality of multi-party conversation and to novel techniques for speaker prediction. We show that through adaptation to conversational patterns, the ALNAC protocol can achieve perceptual quality for large-scale audio conferencing that, with little cost to each end-system node, is comparable to IP multicast.

Item Type: Contribution in Book/Report/Proceedings
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 57382
Deposited By: ep_importer_pure
Deposited On: 05 Oct 2012 11:36
Refereed?: No
Published?: Published
Last Modified: 10 Apr 2014 01:24
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57382

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