Algebraic Code Excited Linear Prediction
The Algebraic Code Excited Linear Prediction , ACELP for short , is a patented vocoder from VoiceAge Corporation , which is used in the lossy compression of speech signals in the telecommunications sector. The process was developed in 1989 at the Université de Sherbrooke in Canada .
Like Code-Excited Linear Prediction (CELP), the method is based on vector quantization and parametric audio coding , but, in contrast to CELP, has a lower delay time (latency) and requires less memory.
ACELP is used in a number of voice services for data reduction, such as in mobile radio with Adaptive Multi-Rate , with digital trunked radio TETRA , in the context of ITU-T standards of the G series for G.723.1 and in an adapted form for G.729 (CS-ACELP), which are used for VoIP .
Web links
- VoiceAge Corp. , Codec Technologies
Individual evidence
- ↑ Technologie de compression de la parole ACELP (French).
- ^ ACELP map ( Memento from October 14, 2007 in the Internet Archive ), VoiceAge Corporation.
