A background for sinusoid based representation of voiced speech

Sinusoid based models have been used in the last few years for high quality representation of voiced speech. In this paper we first review a theoretical basis for this kind of representation, and then introduce a spectral model for varying-frequency sinusoids. This model is used for estimating the sinusoid parameters end it is also intended for accurate representation of the spectrum of voiced speech. A time warping procedure is presented, which permits to reduce the overlap between high frequency spectral lines, with the purpose of improving their estimation.