METHOD AND APPARATUS FOR SYNTHESIZING SPEECH WITHOUT VOICING OR PITCH INFORMATION
摘要
<p>A channel bank speech synthesizer for reconstructing speech from externally-generated acoustic feature information without using externally-generated voicing or pitch information is disclosed. An N-channel pitch-excited channel bank synthesizer (340) is provided having a first low-frequency group of channel gain values (1 to M) and a second high-frequency group of channel gain values (+1 to N). The first group controls a first group of amplitude modulators (950) excited by a periodic pitch pulse source (920), and the second group controls amplitude modulators excited by a noise source (930). Both groups of modulated excitation signals are applied to the bandpass filters (960) to reconstruct the speech channels, and then combined at the summation network (970) to form a reconstructed synthesized speech signal. Additionally, the pitch pulse source (920) varies the pitch pulse period such that the pitch pulse rate decreases over the length of the word.</p>
申请公布号
EP0255524(B1)
申请公布日期
1993.07.21
申请号
EP19870900607
申请日期
1986.12.22
申请人
MOTOROLA, INC.
发明人
BORTH, DAVID, EDWARD;GERSON, IRA, ALAN;VILMUR, RICHARD, JOSEPH;LINDSLEY, BRETT, LOUIS