Speech Quality of VoIP: Assessment and Prediction / Edition 1by Alexander Raake
Pub. Date: 11/03/2006
Perceived Quality of VoIP addresses speech quality of VoIP networks, whilst addressing the implications for the design of VoIP networks and systems. The book bridges the gap between the technical network-world and the (psychoacoustic) world of quality perception. Starting from the network designer's point of view, the different characteristics of the network are… See more details below
Perceived Quality of VoIP addresses speech quality of VoIP networks, whilst addressing the implications for the design of VoIP networks and systems. The book bridges the gap between the technical network-world and the (psychoacoustic) world of quality perception. Starting from the network designer's point of view, the different characteristics of the network are addressed, and then linked to features perceived by users. Since quality can be viewed as the result of a comparison of perceived features with desired features, not only the perception of features determines quality, but also the features a user desires of a system. The book addresses both of these aspects.
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Table of Contents
List of Abbreviations.
1 Speech Quality in Telephony.
1.2 Speech Quality.
2 Speech Quality Measurement Methods.
2.1 Auditory Methods.
2.2 Instrumental Methods.
2.3 Speech Quality Measurement Methods: Summary.
3 Quality Elements and Quality Features of VoIP.
3.1 Speech Transmission Using Internet Protocol.
3.2 Overview of Quality Elements.
3.3 Quality Elements and Related Features.
3.4 Quality Dimensions.
3.5 Combined Elements and Combined Features.
3.6 Listening and Conversational Features.
3.7 Desired Nature.
3.8 Open Questions.
3.9 From Elements to Features: Modeling VoIP Speech Quality.
3.10 Quality Elements and Quality Features of VoIP: Summary.
4 Time-Varying Distortion: Quality Features and Modeling.
4.1 Microscopic Loss Behavior.
4.2 Macroscopic Loss Behavior.
4.4 Packet Loss and Combined Impairments.
4.5 Time-Varying Distortion: Summary.
5 Wideband Speech, Linear and Non Linear Distortion: Quality Features and Modeling.
5.1 Wideband Speech: Improvement Over Narrowband.
5.2 Bandpass-Filtered Speech.
5.3 Wideband Codecs.
5.4 Desired Nature.
6 From Elements to Features: Extensions of the E-model.
6.1 E-model: Packet Loss.
6.2 E-model: Additivity.
6.3 E-model: Wideband, Linear and Non-Linear Distortion.
7 Summary and Conclusions.
A Aspects of a Parametric Description of Time-Varying Distortion.
B Simulation of Quality Elements.
C Frequency Responses.
D Test Data Normalization and Transformation.
E E-model Algorithm.
F Interactive Short Conversation Test Scenarios (iSCTs).
G Auditory Test Settings and Results.
H Modeling Details.
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