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Engineering - Signals & Communication | Management of Speech and Video Telephony Quality in Heterogeneous Wireless Networks

Management of Speech and Video Telephony Quality in Heterogeneous Wireless Networks

Lewcio, Błażej

2014, X, 153 p. 40 illus., 2 illus. in color.

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  • Shows how networking research and quality engineering can be combined to successfully manage the quality when speech and video telephony is delivered in heterogeneous wireless networks
  • Focuses on the perception of quality changes due to switching between diverse networks, codecs, and bit rates during ongoing calls
  • Validates how accurately can the quality in heterogeneous networks be predicted with existing quality models

This book shows how networking research and quality engineering can be combined to successfully manage the transmission quality when speech and video telephony is delivered in heterogeneous wireless networks. Nomadic use of services requires intelligent management of ongoing transmission, and to make the best of available resources many fundamental trade-offs must be considered. Network coverage versus throughput and reliability of a connection is one key aspect, efficiency versus robustness of signal compression is another. However, to successfully manage services, user-perceived Quality of Experience (QoE) in heterogeneous networks must be known, and the perception of quality changes must be understood.  These issues are addressed in this book, in particular focusing on the perception of quality changes due to switching between diverse networks, speech and video codecs, and encoding bit rates during active calls.

Content Level » Research

Keywords » Codec - Heterogeneous Wireless Networks - Network Coverage - Nomadic Users - Quality of Experience QoE - Signal Compression - Speech Telephony - Video Telephony

Related subjects » Database Management & Information Retrieval - Signals & Communication

Table of contents 

Introduction.- Experience of wireless telephony.- Heterogeneous testbed.- Experience of speech telephony.- Experience of video telephony.- Conclusions.

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