'''Relaxed Code Excitedcode-excited Linearlinear Predictionprediction''' ('''RCELP''') is a method used in some advanced [[speech codec]]s. The RCELP [[algorithm]] does not attempt to match the original signal exactly. Instead, it matches a [[time-warped]] version of this original signal that conforms to a simplified [[pitch contour]].<ref>{{Cite book|title=Speech Coding|last=Bäckström|first=Tom|last2=Fuchs|first2=Guillaume|date=2017-01-01|publisher=Springer International Publishing|isbn=9783319502021|series=Signals and Communication Technology|pages=205–215|language=en|doi=10.1007/978-3-319-50204-5_14}}</ref>
