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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. |
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XSLTXSLT documents a core technology for processing XML. Originally created for page layout, XSLT (Extensible Stylesheet Transformations) is now much more: a general-purpose translation tool, a system for reorganizing document content, and a way to generate multiple results-- such as HTML, WAP, and SVG--from the same content. What... | | Solaris: System Administration Guide: No.7Covers a broad range of Solaris system administration topics such as managing user accounts and groups; managing server and client support; shutting down and booting a system; managing removable media (CDs, diskettes, and PCMCIA cards); managing software (packages and patches); managing disks and devices; managing file systems, backing up and... | | |
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