What is CELP (Code Excited Linear Prediction)?

Code-excited linear prediction (CELP) is an algorithm of linear predictive speech coding. It was first created in 1985. It gave preferred quality than existing low-bit-rate algorithms, like residual-excited linear prediction (RELP) and linear predictive coding (LPC) vocoders. It is likewise utilized in MPEG-4 Audio speech coding. CELP is utilized as a nonexclusive term for a class of algorithms.
CELP depends on a source-filter model of speech, where linear prediction is utilized to demonstrate the filtering effect of the vocal tract.