Speech coding device

Abstract From the Canadian patent

A speech coding device in which an excitation signal of speech signals is expressed as a sum of a plurality of pulse strings. and positions of the pulse strings are selected from predetermined pulse position candidates to determine the excitation signal so that distortion between an input speech signal and a reproduced speech signal obtained by exciting a synthetic filter using the excitation signal may be minimized resulting in obtaining reproduced speech signals with high quality in a small operational amount. In a pulse searcher a pulse generating section outputs a plurality of pulse strings. and a pulse searching section sequentially searches the pulse strings to determine the positions …