Source-driven packet marking for speech transmission over differentiated-services networks

Author

De Martin, Juan Carlos

Author_Institution

IRITI-CNR, Politecnico di Torino, Italy

Volume

2

fYear

2001

fDate

2001

Firstpage

753

Abstract

We present a source-driven approach to packet marking for speech transmission over packet networks implementing the Differentiated Services model. Packets generated by the speech coder are examined: if deemed perceptually critical, they are marked as premium and sent on a "virtual wire;" otherwise, they are sent as regular best-effort traffic. Applied to speech coded with the ITU-T 8 kb/s speech coding standard G.729, the proposed source-driven packet marking scheme outperforms source-transparent techniques and provides clearly better perceptual quality than the unprotected case sending as little as 1/5 of the coded bitstream as premium traffic

Keywords

Internet telephony; packet switching; speech coding; speech intelligibility; telecommunication traffic; voice communication; 8 kbit/s; G.729 standard; IP networks; ITU-T speech coding standard; QoS; VoIP; best-effort traffic; coded bitstream; differentiated services model; differentiated-services networks; formal subjective listening tests; packet networks; perceptual quality; premium traffic; source-driven packet marking; source-transparent techniques; speech coder; speech transmission; virtual wire; voice over IP; Bandwidth; Code standards; Diffserv networks; Electronic mail; Protection; Quality of service; Speech coding; Streaming media; Telecommunication traffic; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on

Conference_Location

Salt Lake City, UT

ISSN

1520-6149

Print_ISBN

0-7803-7041-4

Type

conf

DOI

10.1109/ICASSP.2001.941024

Filename

941024