Differential coding of speech LSF parameters using hybrid vector quantization and bidirectional prediction

Author

Silva, Lucio Martins da ; Alcaim, Abraham

Author_Institution

Dept. of Electr. Eng., Brasilia Univ., Brazil

Volume

8

Issue

2

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

208

Lastpage

211

Abstract

This article presents a new strategy to encode the LP (linear predictive) short-time spectral envelope (STSE) of speech. A better reconstruction of the STSE is achieved by modifying the usual trade-off between the transmission rate of the LP parameters and the performance of the quantization algorithm. A differential coding based on bidirectional prediction and hybrid vector quantization is used to compensate the increase in transmission rate. Simulation results show the effectiveness of this coding strategy

Keywords

filtering theory; linear predictive coding; parameter estimation; signal reconstruction; spectral analysis; speech coding; vector quantisation; CELP coder; LP parameters; LP short-time spectral envelope; bidirectional prediction; differential coding; hybrid vector quantization; information compression; line spectral frequencies; linear prediction coding; quantization algorithm; short-term linear prediction filter; simulation results; speech LSF parameters; speech envelope reconstruction; speech quality; transmission rate; Bit rate; Information filtering; Information filters; Linear predictive coding; Nonlinear filters; Predictive models; Signal analysis; Speech analysis; Speech coding; Vector quantization;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.824708

Filename

824708