Accurate, critically sampled characteristic waveform surface construction for waveform interpolation decomposition

Authors

N. R. Chong-White, University of WollongongFollow
I. Burnett, University of WollongongFollow

RIS ID

5569

Publication Details

This article was originally published as: Chong-White, NR & Burnett, I, Accurate, critically sampled characteristic waveform surface construction for waveform interpolation decomposition, Electronics Letters, 6 July 2000, 36(14), 1245-1247. Copyright IEEE 2000.

Abstract

A waveform-matched waveform interpolation (WMWI) technique is presented which offers improved signal analysis over standard WI coders and, in the unquantised case, perfect reconstruction. In WMWI, an accurate representation of speech evolution is formed by extracting consecutive pitch periods of a time-warped, constant pitch residual. A pitch track optimisation technique is described which ensures that the critically sampled pitch periods can be effectively decomposed into a slowly evolving and rapidly evolving waveform, allowing efficient quantisation.