@InProceedings{Raake2009_303,
<br/>   author = {Alexander Raake and Marcel Wältermann and Nicolas Côté and Sebastian Möller},
<br/>   booktitle = {Studientexte zur Sprachkommunikation: Elektronische Sprachsignalverarbeitung 2009},
<br/>   title = {Speech Quality of wideband VoIP under packet loss},
<br/>   year = {2009},
<br/>   editor = {Rüdiger Hoffmann},
<br/>   month = mar,
<br/>   pages = {310--319},
<br/>   publisher = {TUDpress, Dresden},
<br/>   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.},
<br/>   isbn = {978-3-941298-31-6},
<br/>   issn = {0940-6832},
<br/>   keywords = {Sprachqualität},
<br/>   url = {https://www.essv.de/pdf/2009_310_319.pdf},
<br/>}