Delay bounds for voice over IP calls transported over satellite access networks
Mobile Networks and Applications
Assessing Voice Quality in Packet-Based Telephony
IEEE Internet Computing
Allowable Propagation Delay for VoIP Calls of Acceptable Quality
AISA '02 Proceedings of the First International Workshop on Advanced Internet Services and Applications
Gauging VoIP Call Quality from 802.11 WLAN Resource Usage
WOWMOM '06 Proceedings of the 2006 International Symposium on on World of Wireless, Mobile and Multimedia Networks
Performance evaluation of a WiMAX testbed under VoIP traffic
WiNTECH '06 Proceedings of the 1st international workshop on Wireless network testbeds, experimental evaluation & characterization
Performance study of objective speech quality measurement for modern wireless-VoIP communications
EURASIP Journal on Audio, Speech, and Music Processing
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This article deals with the ETSI computation model-the E-model-for evaluating speech communication quality in telephone networks. The reasons why such models are of interest for transmission planning of modern networks and the various subjective tests and customer surveys that must form the basis for the computation algorithms are discussed. Then a survey is given of models that are described in the ITU's documents. The structure of the new E-model and the various considerations taken in its development and verification are also discussed. Results from application of the E-model on typical connections agree well with results from other models and from published subjective tests. In particular, impairments caused by low-bit-rate codecs can be quite well predicted by the model, better than by the hitherto used methodology of “quantizing distortion units.” The E-model has also been used in the process of updating some of the ITU-T C-series Recommendations on transmission planning