| 摘要 |
PURPOSE:To obtain natural synthesized sounds by using the sound chord pulses obtd. by analyzing natural voices as a sound source. CONSTITUTION:The parameter value indicating the transmission characteristics of the voice tube extracted by a means 2 for estimating the transmission characteristics of the voice tube is so controlled as to be applied to a filter coefft. of a total zero type. A voice tube reverse filter 3 filters the voices from an input buffer 1 and outputs the differential waveforms of the waveforms of the vocal chord sound source to 6. The waveforms are integrated by a vocal chord pulse extractor 4 which detects the peak within the section of one pitch period and extracts the vocal chord pulses by detecting the zero cross position before and behind this pulse. The section between the vocal chord pulses is outputted as a closed section. A sound source forming means 5 forms the signal which substitutes the waveforms in the closed section with a previously prepd. signal as a sound source. This sound source is filtered in a synthesizing filter 6 by setting the transmission characteristics estimated by the means 2, by which the voices are synthesized. The synthesis which are natural and are less distorted are obtd. in this way. |
