Fundamentals of Voice-Quality Engineering in Wireless Networks
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Fundamentals of Voice-Quality Engineering in Wireless Networks |
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Fundamentals of Voice-Quality Engineering in Wireless Networks |
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基本信息·出版社：Cambridge University Press
·页码：376 页
·出版日期：2006年12月
·ISBN：0521855950
·International Standard Book Number：0521855950
·条形码：9780521855952
·EAN：9780521855952
·装帧：精装
·正文语种：英语
内容简介 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 level. Using a practitioner rather than algorithm-designer angle, this book is unique. It 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. The key issues are exemplified using case studies. 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 for this title including a range of audio examples will be available online at www.cambridge.org/9780521855952.
作者简介 Dr Avi Perry, a key contributor to the ITU-T G.168 standard, is currently an independent consultant. He was Vice President at NMS Communications, where he was responsible for core technology, system engineering, competitive analysis, documentation, and technical support. He has also held positions at Lucent Technologies and Bell Laboratories and the Northwestern University Graduate School of Management.
目录 Introduction; Part I. Voice Quality Foundations: 1. An overview of voice coding architectures in wireless communications; 2. Quantitative assessment of voice quality; Part II. Applications: 3. Electrical echo and echo cancellation; 4. Acoustic echo and its control; 5. Noisy ambience, mobility, and noise reduction; 6. Speech level control; Part III. Wireless Architectures: 7. Mobile-to-mobile stand-alone VQS architectures and their implications on data communications; 8. The VQS evolution to 3G; Part IV. A Network Operator Guide for Selecting, Appraising, and Testing VQS: 9. A network operator guide to testing and appraising voice quality systems; 10. Service provider's system, management, and delivery, requirements; 11. Making economically sound investment decisions concerning voice quality systems; Part V. Managing the Network: 12. Trouble shooting and case studies; Part VI. Afterthoughts and Some Fresh Ideas: 13. Tracer probe; 14. My sound; 15. A procedure for evaluating and contrasting new wireless codecs performance with and without VQS; 16. The theory of sleep; Part VII. Recordings: 17. Audio illustrations; Glossary of common voice quality systems terminology; Abbreviations.
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