NDLI: An adaptive playout algorithm with delay spike detection for real-time VoIP

Content Provider	IEEE Xplore Digital Library
Author	Shallwani, A. Kabal, P.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, Que., Canada (Shallwani, A.; Kabal, P.)
Abstract	As the Internet is a best-effort delivery network, audio packets may be delayed or lost en route to the receiver due to network congestion. To compensate for the variation in network delay, audio applications buffer received packets before playing them out. Basic algorithms adjust the packet play out time during periods of silence such that all packets within a talkspurt are equally delayed. Another approach is to scale individual voice packets using dynamic time-scale modification. In this work, an adaptive playout algorithm based on the normalized least mean square algorithm, is improved by introducing a spike-detection mode to rapidly adjust to delay spikes. Simulations on Internet traces show that the enhanced bi-modal playout algorithm improves performance by reducing both the average delay and the loss rate as compared to the original algorithm.
Starting Page	997
Ending Page	1000
File Size	261898
Page Count	4
File Format	PDF
ISBN	0780377818
ISSN	08407789
DOI	10.1109/CCECE.2003.1226063
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-04
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Internet telephony Delay effects Jitter Disruption tolerant networking Application software Least mean square algorithms Performance loss Propagation losses Transmitters Speech
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Hardware and Architecture

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