Code-excited linear prediction: Difference between revisions

Revision as of 15:07, 5 August 2020

Revision as of 14:17, 30 August 2020

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{{short description|Coding algorithm}}

'''Code-excited linear prediction''' ('''CELP''') is a [[linear predictive coding|linear predictive]] [[speech coding]] algorithm originally proposed by [[Manfred R. Schroeder]] and [[Bishnu S. Atal]] in 1985. At the time, it provided significantly better quality than existing low bit-rate algorithms, such as [[residual-excited linear prediction]] (RELP) and [[linear predictive coding]] (LPC) [[vocoders]] (e.g., [[FS-1015]]). Along with its variants, such as [[algebraic CELP]], [[relaxed CELP]], [[low-delay CELP]] and [[vector sum excited linear prediction]], it is currently the most widely used speech coding algorithm{{Citation needed|reason=No sources to back this claim up.|date=November 2016}}. It is also used in [[MPEG-4 Audio]] speech coding. CELP is commonly used as a generic term for a class of algorithms and not for a particular codec.