ALMOST-PERIODIC SIGNAL GENERATION METHOD AND DEVICE, SPEECH SYNTHESIS METHOD, DEVICE, AND PROGRAM USING THE SAME, AND RECORDING MEDIUM FOR THE PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a speech synthesizing method of synthesizing a speech which is easy for a listener to hear in a noisy atmosphere. PSOLUTION: The speech synthesizing method comprises a procedure of generating a mean basic period of a vowel and a voiced consonant, a procedure of generating an irregular signal having a frequency characteristic in inverse proportion to a frequency, a procedure of generating an almost-periodic signal having a frequency characteristic whose frequency spectrum of time expansion width is in inverse proportion to a frequency by time-expanding and contracting the period irregularly to the mean basic period with an expansion/contraction width corresponding to 4% of the mean basic period on the basis of the irregular signal, a procedure of using the almost-periodic signal as a driving sound source, and a procedure of performing speech synthesis by filtering the driving sound source through an articulation filter determining phonetic property. PCOPYRIGHT: (C)2005,JPO&NCIPI