METHOD FOR SYNTHESIZING VOICED SOUND/VIOCELESS SOUND

摘要

PURPOSE: A method for synthesizing voice sound/voiceless sound is provided to decrease a calculation time by removing the IFFT process in a voiceless sound synthesis and accurately express an original tone of a voiceless sound by adding a randomness of a phase in a voiceless sound has in itself. CONSTITUTION: A voiced/voiceless sound synthesizer(30) receives a phase, an amplitude, a basic frequency, and voiced sound/voiceless sound information received from a voiceless encoder with a trigonometrical function method. The voiced/voiceless sound synthesizer(30) synthesizes a voice in the case that a lth harmonic is a voiceless sound as to a current frame and the harmonic is a voiced sound as to a previously frame in an nth sample of a voice frame. The voiced/voiceless sound synthesizer(30) synthesizes a voice in the case that a lth harmonic is a voiced sound as to a current frame and the harmonic is a voiced sound as to a previously frame and a voice with a variable condition in an nth sample of a voice frame. The voiced/voiceless sound synthesizer(30) synthesizes a voice in the case that a lth harmonic is a voiceless sound as to a current frame and the harmonic is a voiceless sound as to a previously frame and a voice with a variable condition in an nth sample of a voice frame.