Publication detail

Codecs for VoIP Comparison

ŠKORPIL, V. HLAVICA, M.

Original Title

Codecs for VoIP Comparison

Czech Title

Kodeky pro porovnání VoIP

English Title

Codecs for VoIP Comparison

Type

conference paper

Language

en

Original Abstract

The paper describes a comparison of the G.711 – G.729 codecs which are used for compression and subsequent expansion for voice transmission over the Internet (VoIP). Application is made of the Cisco 2821 switches and Cisco 7975G IP telephones. Specific codecs are selected on the basis of a theoretical analysis. Two network analysers (LE-580FX LAN analyser and Fluke network tester) and Wireshark software are used for the analysis. The analysis parameters, which have been chosen for the comparison of individual codecs, are packet-loss, delay, jitter, bandwidth, and fidelity of sound reproduction.

Czech abstract

Příspěvek popisuje porovnání kodeků G.711 – G.729, které se užívají pro kompresi a následnou expanzi při přenosu hlasu pomocí Internetu (VoIP). Aplikace je vytvořena na přepínačích Cisco 2821 a telefonech Cisco 7975G IP. Kodeky jsou vybrány na podkladě teoretické analýzy. K analýze jsou užity dva síťové analyzátory (LE-580FX LAN analyzátor a Fluke network tester) a softwarový analyzátor Wireshark. Analyzovanými parametry, které jsou užity pro porovnání jednotlivých kodeků, josu ztráta paketů, zpoždění, jitter, šířka pásma a věrnost zvukové reprodukce.

English abstract

The paper describes a comparison of the G.711 – G.729 codecs which are used for compression and subsequent expansion for voice transmission over the Internet (VoIP). Application is made of the Cisco 2821 switches and Cisco 7975G IP telephones. Specific codecs are selected on the basis of a theoretical analysis. Two network analysers (LE-580FX LAN analyser and Fluke network tester) and Wireshark software are used for the analysis. The analysis parameters, which have been chosen for the comparison of individual codecs, are packet-loss, delay, jitter, bandwidth, and fidelity of sound reproduction.

Keywords

VoIP; Codec; Wireshark; CISCO Switch; G.711 – G.729

RIV year

2014

Released

10.09.2014

Publisher

ČVUT Praha

Location

Frymburk

ISBN

978-80-01-05540-3

Book

Proccedings of the 16th International Conference in Telecommunication Technologies RTT 2014

Edition number

1

Pages from

29

Pages to

31

Pages count

3

BibTex


@inproceedings{BUT110211,
  author="Vladislav {Škorpil} and Michal {Hlavica}",
  title="Codecs for VoIP Comparison",
  annote="The paper describes a comparison of the G.711 – G.729 codecs which are used for compression and subsequent expansion for voice transmission over the Internet (VoIP). Application is made of the Cisco 2821 switches and Cisco 7975G IP telephones. Specific codecs are selected on the basis of a theoretical analysis. Two network analysers (LE-580FX LAN analyser and Fluke network tester) and Wireshark software are used for the analysis. The analysis parameters, which have been chosen for the comparison of individual codecs, are packet-loss, delay, jitter, bandwidth, and fidelity of sound reproduction.",
  address="ČVUT Praha",
  booktitle="Proccedings of the 16th International Conference in Telecommunication Technologies RTT 2014",
  chapter="110211",
  howpublished="electronic, physical medium",
  institution="ČVUT Praha",
  year="2014",
  month="september",
  pages="29--31",
  publisher="ČVUT Praha",
  type="conference paper"
}