Title :
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
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;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1204246
