CELP and sinusoidal coders: two solutions for speech coding at 4.8– 96 KBPS

Abstract This paper serves a double purpose: to review the coding methods which have been introduced during the past decade in the 4.8–9.6 kbps range, and to discuss the most recent research trends. The bulk of the paper is devoted to CELP-based coding, a mandatory method which is at the basis of several emerging standards. The rest consists of a brief review of an alternative class of coders based on sinusoidal modelling of speech. The comparison between these opposite techniques will enable us to draw some conclusions and identify areas for future research.