Beyond Voip Protocols
Autor Olivier Hersent, Jean-Pierre Petit, David Gurleen Limba Engleză Hardback – feb 2005
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Specificații
ISBN-13: 9780470023624
ISBN-10: 0470023627
Pagini: 288
Dimensiuni: 175 x 252 x 23 mm
Greutate: 0.64 kg
Ediția:New.
Editura: Wiley
Locul publicării:Chichester, United Kingdom
ISBN-10: 0470023627
Pagini: 288
Dimensiuni: 175 x 252 x 23 mm
Greutate: 0.64 kg
Ediția:New.
Editura: Wiley
Locul publicării:Chichester, United Kingdom
Public țintă
This is THE "must have" book for all engineers deploying VoIP in carrier and operator companies and internet service providers. Professional network engineers, designers and managers, decision makers and project managers overseeing VoIP implementations and market analysts and consultants.Notă biografică
Olivier Hersent is Chairman and CTO of NetCentrex, France (Market Leader in VoIP deployments in Europe).
Jean-Pierre Petit is Head of Voice Technology at France Telecom.
David Gurle is Vice President of Multimedia Communications for Reuters and was previously Head of the Real-Time Communications (VoIP) group at Microsoft.
Jean-Pierre Petit is Head of Voice Technology at France Telecom.
David Gurle is Vice President of Multimedia Communications for Reuters and was previously Head of the Real-Time Communications (VoIP) group at Microsoft.
Cuprins
Glossary xi
List of Abbreviations xv
1 Introduction 1
1.1 There birth of VoIP 1
1.2 Why beyond VoIP protocols? 2
1.3 Scope of this book 5
1.4 Intended audience 6
1.5 Conclusion 7
1.6 References 7
2 Introduction to Speech-coding Techniques 9
2.1 A primer on digital signal processing 9
2.2 The basic tools of digital signal processing 20
2.3 Overview of speech signals 32
2.4 Advanced voice coder algorithms 39
2.5 Waveform coders.ADPCMITU-TG.726 47
2.6 Hybrids and analysis by synthesis(ABS)speech coders 56
2.7 Codebook-excited linear predictive(CELP)coders 61
2.8 Quality of speech coders 74
2.9 Conclusion on speech-coding techniques and their near future 81
2.10 References 84
2.11 Annexes 86
3 Voice Quality 89
3.1 Introduction 89
3.2 Reference VoIP media path 90
3.3 Echo in a telephone network 91
3.4 Delay 101
3.5 Acceptability of a phone call with echo and delay 107
3.6 Conclusion 114
3.7 Standards 115
4 Quality of Service 117
4.1 Introduction: What is QoS? 117
4.2 Describing a data stream 118
4.3 Queuing techniques for QoS 120
4.4 Signaling QoS requirements 130
4.5 The Cable Labs Packet Cable quality-of-service specification: DQoS 154
4.6 Improving QoS in the best effort class 170
4.7 Issues with slow links 174
4.8 Conclusion 179
4.9 References 181
5 Network Dimensioning 183
5.1 Simple compressed voice flow model 183
5.2 Building a network dedicated to IP telephony 199
5.3 Merging data communications and voice communications on one common IP backbone 203
5.4 Multi point communications 206
5.5 Modeling call seizures 212
5.6 Conclusion 224
5.7 References 225
6 IP Multicast Routing 227
6.1 Introduction 227
6.2 When to use multicast routing 227
6.3 The multicast framework 230
6.4 Controlling scope in multicast applications 236
6.5 Building the multicast delivery tree 238
6.6 Multicast-routing protocols 241
6.7 Them Bone 249
6.8 MULTICAST issues on non-broad cast media 253
6.9 Conclusion 254
6.10 References 255
Index 257
1 Introduction 1
1.1 There birth of VoIP 1
1.2 Why beyond VoIP protocols? 2
1.3 Scope of this book 5
1.4 Intended audience 6
1.5 Conclusion 7
1.6 References 7
2 Introduction to Speech-coding Techniques 9
2.1 A primer on digital signal processing 9
2.2 The basic tools of digital signal processing 20
2.3 Overview of speech signals 32
2.4 Advanced voice coder algorithms 39
2.5 Waveform coders.ADPCMITU-TG.726 47
2.6 Hybrids and analysis by synthesis(ABS)speech coders 56
2.7 Codebook-excited linear predictive(CELP)coders 61
2.8 Quality of speech coders 74
2.9 Conclusion on speech-coding techniques and their near future 81
2.10 References 84
2.11 Annexes 86
3 Voice Quality 89
3.1 Introduction 89
3.2 Reference VoIP media path 90
3.3 Echo in a telephone network 91
3.4 Delay 101
3.5 Acceptability of a phone call with echo and delay 107
3.6 Conclusion 114
3.7 Standards 115
4 Quality of Service 117
4.1 Introduction: What is QoS? 117
4.2 Describing a data stream 118
4.3 Queuing techniques for QoS 120
4.4 Signaling QoS requirements 130
4.5 The Cable Labs Packet Cable quality-of-service specification: DQoS 154
4.6 Improving QoS in the best effort class 170
4.7 Issues with slow links 174
4.8 Conclusion 179
4.9 References 181
5 Network Dimensioning 183
5.1 Simple compressed voice flow model 183
5.2 Building a network dedicated to IP telephony 199
5.3 Merging data communications and voice communications on one common IP backbone 203
5.4 Multi point communications 206
5.5 Modeling call seizures 212
5.6 Conclusion 224
5.7 References 225
6 IP Multicast Routing 227
6.1 Introduction 227
6.2 When to use multicast routing 227
6.3 The multicast framework 230
6.4 Controlling scope in multicast applications 236
6.5 Building the multicast delivery tree 238
6.6 Multicast-routing protocols 241
6.7 Them Bone 249
6.8 MULTICAST issues on non-broad cast media 253
6.9 Conclusion 254
6.10 References 255
Index 257
Descriere
In 1999-2000, VoIP (Voice-over-IP) telephony was one of the successful buzzwords of the telecom bubble era. However, in 2001-2003, VoIP faced a very tough reality check. This book offers a comprehensive overview of the issues to solve in order to deploy global revenue-generating effective "multimedia" services.