Design of a variable rate algorithm for CS-ACELP coder

Author

Madre, G. ; Baghious, E.H. ; Azou, S. ; Burel, G.

Author_Institution

Laboratoire d´´Electronique et Syst. de Telecommun., CNRS, Brest, France

Volume

1

fYear

2003

Firstpage

600

Abstract

This paper is about the reduction of the computational complexity of the CS-ACELP codec, described in ITU recommendation G.729, and used for the transmission of voice over IP. A voice activity detection module is proposed to replace the G.729 Annex B algorithm. The new procedure was developed to allow its implementation with number theoretic transforms. The use of Fermat number transforms can reduce the cost of variable rate algorithm implementation on digital signal processor (DSP).

Keywords

Internet telephony; computational complexity; speech coding; transforms; variable rate codes; vocoders; CS-ACELP coder; Fermat number transforms; ITU recommendation G.729; computational complexity; conjugate-structure algebraic code excited linear prediction; digital signal processor; number theoretic transforms; variable rate algorithm; voice activity detection module; voice over IP; Algorithm design and analysis; Computational complexity; Digital signal processing; Discrete Fourier transforms; Fourier transforms; Internet telephony; Low pass filters; Nonlinear filters; Signal processing algorithms; Speech analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2003. ICC '03. IEEE International Conference on

Print_ISBN

0-7803-7802-4

Type

conf

DOI

10.1109/ICC.2003.1204246

Filename

1204246