Abstract: To provide a pitch waveform signal division device and the like for making it possible to compress a data capacity of data representing a sound efficiently. A computer C1 arranges time lengths of sections for a unit pitch of sound data, which the computer C1 compresses, to be identical to thereby generate a pitch waveform signal, detects a boundary of adjacent phonemes included in a sound represented by the pitch waveform signal and an end of this sound on the basis of intensity of a difference between two sections for adjacent unit pitches of this pitch waveform signal, divides the pitch waveform signal in the detected boundary and end, and outputs obtained data as phoneme data.

Abstract: It is possible to provide a speech signal noise elimination device etc. for surely eliminating a noise mixed in a speech. A pitch analysis section 2 calculates the moving correction average of the frequency of the pitch component of the speech represented by the original speech signal acquired by a speech input section 1. A variable-type filter 3 extracts the pitch component by eliminating components other than the moving correction average calculated by the pitch analysis section 2 and its vicinity from the original speech signal. An absolute value detection section 4 determines the absolute value of the pitch component. A low-pass filter 5 filters the signal representing the absolute value obtained and generates the gain adjustment signal. The original speech signal is subjected to timing adjustment by a delay section 6 and amplified or attenuated by a gain adjustment section 7 by use of the gain determined by the value of the gain adjustment signal before being output.