PITCH ESTIMATION METHOD FOR LOW DELAY MULTIBAND EXCITATION VOCODER

A of estimating a pitch in a multiband excitation vocoder is provided. The method includes the steps of (a) obtaining an error amount with respect to respective pitch candidates in a predetermined pitch area from an input voice magnitude spectrum, (b) obtaining a weighted function with respect to the respective pitch candidates, (c) obtaining a weighted error amount with respect to the respective pitch candidates, and (d) determining the candidate pitch having the minimum error amount in the weighted error amount with respect to the respective pitch candidates to be an estimated pitch. According to the present invention, in the vocoder of the multiband excitation method, it is possible to obtain high speech quality due to a short delay time since it is possible to remove a gross pitch error without using a pitch tracking method.