Digital communications: fundamentals and applications
Digital communications: fundamentals and applications
Why we don't know how to simulate the Internet
Proceedings of the 29th conference on Winter simulation
Voice over IP performance monitoring
ACM SIGCOMM Computer Communication Review
Quality VoIP — An Engineering Challenge
BT Technology Journal
Design and realization of ad-hoc VoIP with embedded p-SIP server
Journal of Systems and Software
Application of program agents for optimisation of VoIP communication
ICCCI'11 Proceedings of the Third international conference on Computational collective intelligence: technologies and applications - Volume Part I
Information Systems Frontiers
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Quality of service (QoS) for Voice over IP has to be measured by a perceptual QoS metric that corresponds to the intelligibility and clarity of the speech, as perceived by the listener. This subjective measure must be "captured", mainly by models that rely on objective measurements, based on transmission delays and packet losses monitoring. These parameters which are common on such links can affect dramatically speech quality, especially when wireless links are considered. The ITU-T legacy E-Model, proposed to qualify audio and well adapted to circuit switched networks is not applicable to packet switched networks and must be adapted. In this paper, we present a new model to automatically quantify or measure the speech quality perception for voice/audio communications over IP, named here "Packet-E-Model". We take into consideration synchronization issue, by implementing and testing two types of "offset" algorithms. We also consider a full duplex transmission scenario.