SPEECH PITCH FREQUENCY DETECTING METHOD

摘要

PURPOSE: To accurately and speedily detect the pitch frequency of a speech signal. CONSTITUTION: A speech input part 1 converts the speech signal from analog to digital and a speech segmentation part 2 segments a specific speech section. A GGM conversion part 3 converts the data outputted from the speech segmentation part 2 into data on a pitch period position by using mapping. In this this mapping, a function fm (X) of X of an (m)th component is represented as the linear sum of the products of Lm base functions g1m (X) and a coefficient c1m . A pitch cycle position detection part 4 detects a cycle at a position where the value of the pitch cycle detection parameter outputted by the GGM conversion part 3 is close to 1 as a pitch cycle.