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A New Technique for Improving Quality of Speech in Voice over IP Using Time-Scale Modification

Agnihotri, Samar and Aravidhan, K and Jamadagni, HS and Pawate, BI (2002) A New Technique for Improving Quality of Speech in Voice over IP Using Time-Scale Modification. In: IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2002)., May, 2002, Orlando, Florida, pp. 2085-2088.


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Packet arrival-delay variations and losses seriously affect the quality of voice delivered in VoIP. In this paper, using a time-scale modification algorithm, an integrated scheme is proposed to handle these impairments without introducing additional delays. This scheme provides flexible arrival-delay cut-offs to late arriving packets, reducing the packet loss-rate at the receiver. Further, the lost packets are concealed effectively. Extensive simulations have shown that the proposed scheme delivers high-quality speech across widely varying packet arrival-delays and loss-rates. The proposed scheme is fully receiver-based and with its low computational complexity and generic nature, is applicable to any VoIP system.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: ©2002 IEEE.Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists,or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Voice over IP;Time Scale Modification;Speech Quality;Jitter
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 22 Aug 2008
Last Modified: 19 Sep 2010 04:12
URI: http://eprints.iisc.ac.in/id/eprint/186

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