Algebraic Code Excited Linear Prediction

The Algebraic Code Excited Linear Prediction ACELP abbreviated, represents a patented vocoder of the company VoiceAge Corporation, which finds application in the lossy compression of speech signals in the telecommunications sector. Was developed the method in 1989 at the Université de Sherbrooke in Canada.

The method is based as code - excited linear prediction ( CELP ) on a vector quantization and parametric audio coding, but unlike CELP has a shorter delay time (latency ) and comes with less memory from.

ACELP is used in a number of voice services for data reduction, as in Mobile Adaptive Multi-Rate, the digital trunked TETRA, within the framework of ITU-T standards G.723.1 at the G-series and in a modified form with G.729 (CS- ACELP ), which are found in VoIP applications.