Performance comparison between VBR speech coders for adaptive VoIP applications

Author

Beritelli, F. ; Casale, S. ; Ruggeri, G.

Author_Institution

Dipt. di Ingegneria Inf. e delle Telecomunicazioni, Catania Univ., Italy

Volume

5

Issue

10

fYear

2001

Firstpage

423

Lastpage

425

Abstract

The introduction of new variable bit rate (VBR) speech coders has opened up new perspectives for the implementation of adaptive voice over IP (AVoIP) systems. The paper compares different VBR speech coding techniques in a scenario in which the rate of the single sources is dynamically adapted to the workload conditions. The coders compared are the AMR, the M/sup 3/ R and the G.729. Using source and rate control mechanism models, performance is evaluated in terms of loss probability, offered throughput and mean CMOS with varying numbers of sources. The use of header compression mechanisms is also evaluated.

Keywords

Internet telephony; speech coding; telecommunication control; variable rate codes; AMR coder; AVoIP; G.729 coder; M/sup 3/ R coder; VBR speech coders; adaptive VoIP applications; adaptive voice over IP; header compression mechanisms; loss probability; mean CMOS; offered throughput; performance comparison; rate control mechanism model; source control mechanism model; variable bit rate speech coders; workload conditions; Bit rate; Codecs; Diffserv networks; Internet telephony; Proposals; Quality of service; Semiconductor device modeling; Speech coding; Telecommunication traffic; Traffic control;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.957382

Filename

957382