NDLI: Playout buffering in IP telephony: a quality maximization approach

Content Provider	IEEE Xplore Digital Library
Author	Atzori, L. Lobina, M.L. Isola, M.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Electron. Eng., Cagliari Univ., Italy (Atzori, L.; Lobina, M.L.; Isola, M.)
Abstract	In IP telephony, playout buffering is operated at the receiver side to compensate for network delay variations. This function allows the receiver to reduce packet lateness at the expense of an increase in the end-to-end delay. In recent years, a new approach has been proposed for playout buffering. It is based on using a voice quality model capable of predicting the end-user perceived quality from the network and system parameters. The playout delay (end-to-end delay) is set so as to maximize the quality according to the adopted model. In this paper, we propose a new algorithm based on this approach. The major contribution is the ability to deal with the burstiness in packet losses. This is a significant advance for two main reasons: bursty losses often affect IP telephony applications; the temporal loss correlation influences the human perception of the quality degradation. Accordingly, we propose a new optimality criterion to control the playout delay, which is based on the extensions proposed by the ETSI Tiphon for the ITU-T E-model. Experimental results on real traces prove the efficacy of the proposed algorithm.
Starting Page	49
Ending Page	53
File Size	265642
Page Count	5
File Format	PDF
ISBN	0780393198
DOI	10.1109/MSAN.2005.1489941
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Degradation Speech analysis Codecs Delay effects Humans Telephony Predictive models Jitter Telecommunication standards Added delay
Content Type	Text
Resource Type	Article

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