Showing papers on "Code-excited linear prediction published in 1971"
TL;DR: Application of a type of predictive coding to the channel signals of a homomorphic vocoder has produced sizable bit rate reduction and a technique for obtaining the formant frequencies from the predictive coding parameters is described; this approach promises further bit rate reductions.
Abstract: Application of a type of predictive coding to the channel signals of a homomorphic vocoder has produced sizable bit rate reductions. With only slight degradation in speech quality, reduction (for the spectral envelope information) from 7800 to 4000 bits/s was achieved. A technique for obtaining the formant frequencies from the predictive coding parameters is described; this approach promises further bit rate reductions. As a by-product of this study of predictive coding, direct and cascade form speech synthesizers are compared on the basis of differing quantization effects.
18 citations