On improving performance of analysis by synthesis speech coders

Author

Cucchi, S. ; Fratti, M. ; Ronchi, M.

Author_Institution

Alcatel-Telettra, Milan, Italy

Volume

4

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

243

Lastpage

247

Abstract

An algorithm for improving the performance of analysis-by-synthesis (A-by-S) speech coders is presented. It is shown that proper modifications of the A-by-S strategies commonly used to determine the excitation parameters can be devised. In particular, a redefinition of the classical objective function based on the weighted mean squared error criterion may allow a better tracking of the speech signal transients as well as a better alignment of the synthetic pitch pulses. The implementation details of the algorithm are discussed and experimental results are presented

Keywords

linear predictive coding; speech coding; speech synthesis; vocoders; CELP; LPC; algorithm; analysis by synthesis speech coders; classical objective function; code excited linear prediction; excitation parameter; performance improvement; speech signal transients; synthetic pitch pulses; tracking; weighted mean squared error criterion; Algorithm design and analysis; Bit rate; Convergence; Degradation; Filters; Linear predictive coding; Performance analysis; Signal synthesis; Speech analysis; Speech synthesis;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.496222

Filename

496222