Perceptually Constrained Variable Bitrate Wideband Speech Coder

Author

Livshitz, Michael ; Petrovsky, Alexander

Author_Institution

Comput. Eng. Dept., Belarusian State Univ. of Informatics & Radioelectron., Minsk

Volume

2

fYear

2005

fDate

21-24 Nov. 2005

Firstpage

1296

Lastpage

1299

Abstract

A high quality wideband speech coder based on code-excited linear prediction (CELP) algorithm with perceptually constrained variable bitrate (VBR) is proposed in this paper. A VBR is achieved with the help of reconfigurable structure of multiband multistage codebook of excitation vectors controlled by psychoacoustic model based on warped discrete-Fourier transform (WDFT). Comparison with MPEG1 Layer III codecs at 16, 24 and 32 kbps is implemented

Keywords

speech coding; variable rate codes; vocoders; code-excited linear prediction; excitation vectors; high quality wideband speech coder; multiband multistage codebook; perceptually constrained variable bitrate; psychoacoustic model; variable bitrate wideband speech coder; warped discrete-Fourier transform; Bandwidth; Bit rate; Codecs; Discrete transforms; Frequency; Psychoacoustic models; Psychology; Quantization; Speech; Wideband; CELP; Multiband Codebook with Multistage Structure; Psychoacoustics; Reconfigurable Codebook Structure; Variable Bitrate; WDFT;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer as a Tool, 2005. EUROCON 2005.The International Conference on

Conference_Location

Belgrade

Print_ISBN

1-4244-0049-X

Type

conf

DOI

10.1109/EURCON.2005.1630195

Filename

1630195