Fundamentals of Voice Quality Engineering in Wireless Networks

Avi Perry

376 pages, parution le 07/12/2006

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Résumé

Network operators are faced with the challenge of maximizing the quality of voice transmissions in wireless communications without impairing speech or data transmission. This book provides a comprehensive survey of voice quality algorithms, features, interactions, and trade-offs, at the device and system levels. Using a practitioner rather than algorithm-designer angle, this book is unique. The book elaborates on the root cause of impairments and ways for resolving them, as well as methodologies for measuring and quantifying voice quality before and after applying the remedies. A 'troubleshooting and case studies' chapter provides a useful approach to identifying and solving network impairments. Avoiding complex mathematics, the approach is based on real and sizable field experience supported by scientific and laboratory analysis. This title is suitable for practitioners in the wireless communications industry and graduate students in electrical engineering. Further resources, including a range of audio examples are available online.

A trouble-shooting and case studies section provides a useful approach to identifying and solving network impairments
Audio recordings, available on-line, enhance understanding by presenting a physical illustration of the issues
Written from a practitioner rather than algorithm-design perspective, the issues are covered using logical reasoning and not complicated mathematics, making the book accessible to product managers, office managers, and sales, marketing and purchasing agents

Sommaire

Voice Quality Foundations
- An overview of voice coding architectures in wireless communications
- Quantitative assessment of voice quality
Applications
- Electrical echo and echo cancellation
- Acoustic echo and its control
- Noisy ambience, mobility, and noise reduction
- Speech level control
Wireless Architectures
- Mobile-to-mobile stand-alone VQS architectures and their implications on data communications
- The VQS evolution to 3G
A Network Operator Guide for Selecting, Appraising, and Testing VQS
- A network operator guide to testing and appraising voice quality systems
- Service provider's system, management, and delivery, requirements
- Making economically sound investment decisions concerning voice quality systems
Managing the Network
- Trouble shooting and case studies
Afterthoughts and Some Fresh Ideas
- Tracer probe
- My sound
- A procedure for evaluating and contrasting new wireless codecs performance with and without VQS
- The theory of sleep
Recordings
- Audio illustrations
Glossary of common voice quality systems terminology

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Caractéristiques techniques

	PAPIER
Éditeur(s)	Cambridge University Press
Auteur(s)	Avi Perry
Parution	07/12/2006
Nb. de pages	376
Format	18 x 25,5
Couverture	Relié
Poids	885g
Intérieur	Noir et Blanc
EAN13	9780521855952
ISBN13	978-0-521-85595-2