Posted in Telecommunications

Download Beyond VoIP Protocols: Understanding Voice Technology and by Olivier Hersent PDF

By Olivier Hersent

ISBN-10: 0470023627

ISBN-13: 9780470023624

In 1999-2000, VoIP (Voice-over-IP) telephony used to be essentially the most profitable buzzwords of the telecom bubble period. notwithstanding, in 2001-2003, VoIP confronted a really difficult truth payment. Now, brands and repair companies are drawing on what they've got learnt from earlier event so that it will arrange to take part within the subsequent significant problem confronted by way of the telecommunications industry.This booklet deals a entire evaluation of the problems to resolve so as to installation worldwide revenue-generating powerful "multimedia" companies. Drawing on huge study and useful deployment event in VoIP, the authors supply crucial suggestion for these trying to layout and enforce a post-bubble VoIP network.Beyond VoIP Protocols: realizing Voice know-how and Networking suggestions for IP Telephony Introduces the fundamentals of speech coding and voice qualityDemonstrates how caliber of carrier will be outfitted into the community and bargains with dimensioning points, e.g. multipoint communications and the way to version name seizures.Explores the potential for multicast to show an IP spine into an optimized broadcast mediumIncludes amply illustrated, cutting-edge sensible recommendation for formulating a whole deployment strategyA spouse quantity to "IP Telephony: Deploying VoIP Protocols", this booklet takes the reader a level deeper into the way to arrange the community and take advantage of VoIP know-how to its complete capability.

Show description

Read Online or Download Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony PDF

Best & telecommunications books

Mobile, Wireless and Sensor Networks: Technology, Applications and Future Directions

This book represents the easiest pondering and ideas to a myriad of up to date matters in instant networks. assurance comprises instant LANs, multihop instant networks, and sensor networks. Readers are supplied with insightful tips in tackling such matters as structure, protocols, modeling, research, and suggestions.

Signal analysis: wavelets, filter banks, time-frequency transforms, and applications

Sign research offers an perception into the houses of signs and stochastic procedures via method. Linear transforms are imperative to the ongoing development of sign techniques as they symbolize and classify indications. particularly, these transforms that supply time-frequency sign research are attracting better numbers of researchers and have gotten a space of substantial significance.

Tele-Stress - Relief For Call Center Stress Syndrome

This publication can assist phone pros to: - lessen on-the-job cell pressure - improve phone communications abilities - construct greater buyer relationships over the phone - study sensible, logic mobile recommendations that truly paintings ; pressure in name facilities is a huge challenge.

Engineering Information Security: The Application of Systems Engineering Concepts to Achieve Information Assurance

Engineering info safeguard covers all points of knowledge safeguard utilizing a scientific engineering strategy and specializes in the point of view of the way to manage entry to details. features a dialogue approximately keeping garage of non-public keys, SCADA, Cloud, Sensor, and advert Hoc networks Covers inner operations protection tactics of displays, evaluate exceptions, and plan remediation Over 15 new sections teacher assets akin to lecture slides, assignments, quizzes, and a collection of questions equipped as a last examination when you are an teacher and followed this publication in your path, please e mail ieeeproposals@wiley.

Extra resources for Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony

Sample text

Frequency 14 BEYOND VoIP PROTOCOLS is for the bandwidth of the original analog signal to be strictly limited to the frequency band [0, Fs /2]. 5 shows an ideal situation and a frequency-wrapping situation; in the case of frequency wrapping, the recovered signal is spoiled by frequency aliasing. The spectrum of real physical signals (such as the electrical signal generated by a microphone) do not have a well-defined frequency limit. Therefore, before the sampling process, it is necessary to cut off any frequency component beyond the Nyquist frequency by using an ‘anti-aliasing’ analog filter.

An audio signal restricted to this band remains very clear and understandable, but does alter the natural sound of the speaker voice. This bandwidth is not sufficient to provide good music quality. • The audio wide-band from 30 Hz to 7,000 Hz. Speech is reproduced with an excellent quality and fidelity, but this is still not good enough for music. • The hi-fi band from 20 Hz to 15 kHz. Excellent quality for both voice and music. ) for spatialized sound reproduction. • The CD quality band from 20 Hz to 20 kHz.

The two laws rely on the same approximation of a logarithmic curve: using segments with a slope increasing by a factor of 2, but the exact length of segments and slopes differ between the A-law and the µ-law. This results in subtle differences between the A-law and the µ-law: the A-law provides a greater dynamic range than the µ-law, but the µ-law provides a slightly better SNR than the A-law for low-level signals (in practice, the least significant bit is often stolen for signaling purposes in µ-law countries, which degrades the theoretical SNR).

Download PDF sample

Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony by Olivier Hersent

by Anthony

Rated 4.45 of 5 – based on 24 votes