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Skew detection and compensation for Internet audio applications

Hodson, O., Perkins, C.S., and Hardman, V. (2000) Skew detection and compensation for Internet audio applications. In: IEEE International Conference on Multimedia and Expo, 30 July-2 August 2000, New York.

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Publisher's URL: http://dx.doi.org/10.1109/ICME.2000.871096

Abstract

Long lived audio streams, such as music broadcasts, and small differences in clock rates lead to buffer underflow or overflow events in receiving applications that manifest themselves as audible interruptions. We present a low complexity algorithm for detecting clock skew in network audio applications that function with local clocks and in the absence of a synchronization mechanism. A companion algorithm to perform skew compensation is also presented. The compensation algorithm utilises the temporal redundancy inherent in audio streams to make inaudible playout adjustments. Both algorithms have been implemented in a simulator and in a network audio application. They perform effectively over the range of observed clock rate differences and beyond.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Perkins, Dr Colin
Authors: Hodson, O., Perkins, C.S., and Hardman, V.
Subjects:Q Science > QA Mathematics > QA75 Electronic computers. Computer science
College/School:College of Science and Engineering > School of Computing Science
Publisher:Institute of Electrical and Electronics Engineers
Copyright Holders:Copyright © 2000 Institute of Electrical and Electronics Engineers
First Published:First published in Proceedings of the IEEE International Conference on Multimedia and Expo 2000
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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