Patent ID: 6041298
Filing Date: 2000-03-21
Classification: G10L

Abstract:
Method for synthesizing a frame of a speech signal in a speech codec, in which a synthesis filter of a speech coder of the speech codec is supplied with an excitation vector consisting of an adaptive excitation part and a stochastic excitation part, which is taken from a previously calculated ideal Regular Pulse Excitation (RPE) sequence, comprising steps of:a) determining a position of a first non-zero pulse in the ideal RPE sequence,b) determining positions of a preselected number of strongest pulses in the ideal RPE sequence,c) determining amplitudes of the preselected number of strongest pulses, andd) determining signs of the preselected number of strongest pulses,wherein the positions, amplitudes, and signs furthermore being transmitted to a speech decoder of the speech codec in order to produce the stochastic excitation part there as well.