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.