Performance Analysis of a Decoder-Based Time Scaling Algorithm for Variable Jitter Buffering of Speech Over Packet Networks

Author

Gournay, Philippe ; Anderson, Kyle D.

Author_Institution

VoiceAge Corp., Montreal, Que.

Volume

1

fYear

2006

fDate

14-19 May 2006

Abstract

This paper describes how a CELP speech decoder such as the VMR-WB decoder can be modified in order to deliver decoded speech frames of variable length, a feature that is required for adaptive jitter buffering. This method is shown to be successful for playout delay adaptation in terms of both subjective quality and reactivity. Moreover, it requires almost no additional complexity provided some clever limitations are imposed on time scaling

Keywords

decoding; jitter; linear predictive coding; speech coding; variable rate codes; CELP speech decoder; VMR-WB decoder; adaptive jitter buffering; code excited linear prediction decoder; decoded speech frames; decoder-based time scaling algorithm; packet networks; playout delay adaptation; variable multi rate wideband decoder; variable speech jitter buffering; Added delay; Clocks; Codecs; Delay effects; Iterative decoding; Jitter; Performance analysis; Speech analysis; Speech synthesis; Statistics;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1659946

Filename

1659946