VoIP Voice and Fax Signal Processing

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John Wiley & Sons, 3 окт. 2008 г. - Всего страниц: 380
A complete and systematic treatment of signal processing for VoIP voice and fax

This book presents a consolidated view and basic approach to signal processing for VoIP voice and fax solutions. It provides readers with complete coverage of the topic, from how things work in voice and fax modules, to signal processing aspects, implementation, and testing. Beginning with an overview of VoIP infrastructure, interfaces, and signals, the book systematically covers:

  • Voice compression

  • Packet loss concealment techniques

  • DTMF detection, generation, and rejection

  • Wideband voice modules operation

  • VoIP Voice-Network bit rate calculations

  • VoIP voice testing

  • Fax over IP and modem over IP

  • Country deviations of PSTN mapped to VoIP

  • VoIP on different processors and architectures

  • Generic VAD-CNG for waveform codecs

  • Echo cancellation

  • Caller ID features in VoIP

  • Packetization—RTP, RTCP, and jitter buffer

  • Clock sources for VoIP applications

  • Fax operation on PSTN, modulations, and fax messages

  • Fax over IP payload formats and bit rate calculations

  • Voice packets jitter with large data packets

  • VoIP voice quality

Over 100 questions and answers on voice and more than seventy questions and answers on fax are provided at the back of the book to reinforce the topics covered throughout the text. Additionally, several clarification, interpretation, and discussion sections are included in selected chapters to aide in readers' comprehension.

VoIP Voice and Fax Signal Processing is an indispensable resource for professional electrical engineers, voice and fax solution developers, product and deployment support teams, quality assurance and test engineers, and computer engineers. It also serves as a valuable textbook for graduate-level students in electrical engineering and computer engineering courses.

 

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Содержание

1 PSTN Basic Infrastructure Interfaces and Signals
1
2 VoIP Overview and Infrastructure
19
3 Voice Compression
49
4 Generic VADCNG for Waveform codecs
76
5 Packet Loss Concealment Techniques
91
6 ECHO Cancellation
113
7 DTMF Detection Generation and Rejection
151
8 Caller ID Features in VoIP
179
14 Fax Operation on PSTN Modulations and Fax Messages
282
15 Fax Over IP and Modem Over IP
333
16 Fax Over IP Payload Formats and Bit Rate Calculations
371
17 Country Deviations of the PSTN Mapped to VoIP
393
18 Voice Packets Jitter with Large Data Packets
406
19 VoIP on Different Processors and Architectures
414
20 VoIP Voice Quality
425
21 VoIP Voice FAQs
464

9 Wideband Voice Modules Operation
203
10 PacketizationRTP RTCP and Jitter Buffer
215
11 VoIP VoiceNetwork Bit Rate Calculations
242
12 Clock Sources for VoIP Applications
257
13 VoIP Voice Testing
269
22 Basic Fax and Fax Over IP FAQs
484
BIBLIOGRAPHY
498
Index
517
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Об авторе (2008)

Sivannarayana Nagireddi, PhD, is the architect of VoIP solutions at Ikanos Communications, Inc., and leads the DSP and VoIP team. Dr. Nagireddi and his team developed complete VoIP solutions including signal processing algorithms for voice-enabled residential gateway processors, which have been deployed by telecommunications providers. He is a member of the IEEE, a Fellow of IETE-India, and reviewer for the journal Medical Engineering & Physics.

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