ケプストラムによる音声のピッチ周波数推定 : 評価信号の提案と分析可能範囲の考察

Abstract

A measuring system for fundamental pitch frequency of human speech signal was considered. Pitch frequencies can be estimated by using cepstrum technique, and a frequency modulated sawteeth signal is proposed to evaluate the accuracy of the cepstrum pitch estimator. The results of caclulated pitch frequency of continuous speech are shown. Running pitch frequency is also used by averaging every instantaneous pitch frequencies with exponentially decreasing weights for realtime computer processing of human speech signal.