author = {Alexander Raake and Marcel Wältermann and Nicolas Côté and Sebastian Möller},
booktitle = {Studientexte zur Sprachkommunikation: Elektronische Sprachsignalverarbeitung 2009},
title = {Speech Quality of wideband VoIP under packet loss},
year = {2009},
editor = {Rüdiger Hoffmann},
month = mar,
pages = {310--319},
publisher = {TUDpress, Dresden},
abstract = {In this paper, we propose a model that predicts the quality impairment of wideband (50-7000 Hz) speech transmitted using Voice over Internet Protocol (VoIP) under packet loss. Our approach is an extension of the so-called Emodel, a parametric tool recommended by the International Telecommunication Union (ITU-T) for the planning of telephone networks [3]. The present study follows an earlier extension of the E-model’s quality rating scale from narrowband (300-3400 Hz) to wideband [23, 4], and the specification of so-called Wideband Equipment Impairment Factors Ie,wb that quantify the impairment due to wideband speech coding under error-free conditions [18]. Based on an extensive series of listening tests, we present some new considerations on how wideband speech quality is impacted by uniform packet loss. These considerations are well in line with earlier work on narrowband speech quality under VoIP packet loss [21, 22]. Following the proposed method, we present new wideband equipment impairment factors for a number of codecs and a set of so-called Packet Loss Robustness Factors Bpl for the a number of speech codecs.},
isbn = {978-3-941298-31-6},
issn = {0940-6832},
keywords = {Sprachqualität},
url = {https://www.essv.de/pdf/2009_310_319.pdf},