Title :
On the periodicity of speech coded with linear-prediction based analysis by synthesis coders
Author :
Kleijn, W. Bastiaan
Author_Institution :
Speech-Coding Res. Dept., AT&T Bell Labs., Murray Hill, NJ, USA
fDate :
10/1/1994 12:00:00 AM
Abstract :
The closed-loop pitch predictor (CLPP) is an essential part of most linear-prediction based analysis-by-synthesis (LPAS) coders. The author discusses the relation between the periodicity of the original and reconstructed signals for LPAS coders with a CLPP. It is shown that the periodicity is unchanged if the periodicity of the original signal is generated with an autoregressive model and increases or decreases for several other signal classes. The theoretical findings are confirmed by experiments
Keywords :
linear predictive coding; speech coding; stochastic processes; time series; vocoders; CLPP; LPAS coder; autoregressive model; closed-loop pitch predictor; linear-prediction based analysis by synthesis coders; original signal; periodicity; reconstructed signal; speech coding; Bit rate; Counting circuits; Delay; Filters; Signal generators; Signal synthesis; Speech analysis; Speech coding; Speech enhancement; Speech synthesis;
Journal_Title :
Speech and Audio Processing, IEEE Transactions on
