Patent ID: 6532443
Filing Date: 2003-03-11
Classification: G10L

Abstract:
A speech encoding method in which an input speech signal is divided on a time axis in terms of pre-set frames and encoded in terms of the pre-set frames and encoded in terms of the pre-set frames, the speech encoding method comprising the steps of:finding short-term prediction residuals of the input speech signal; and encoding the short-term prediction residuals of specified frames by sinusoidal analytic encoding to generate sinusoidal analysis encoded parameters, wherein a perceptually weighted vector quantization is applied to the sinusoidal analysis encoding parameters of the short-term prediction residuals, and a weight value for the perceptually weighted vector quantization is calculated from results of an orthogonal transform of parameters derived by using an approximated impulse response obtained by reducing a length of an infinite impulse response of a weight transfer function with a finite length and by appending at least a zero thereto.