Speech synthesis system by rule using phonemes as systhesis units
US4896359A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1988 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | May 17, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L13/07
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech synthesizer that synthesizes speech by actuating a voice source and a filter which processes output of the voice source according to speech parameters in each successive short interval of time according to feature vectors which include formant frequencies, formant bandwidth, speech rate and so on. Each feature vector, or speech parameter is defined by two target points (r.sub.1, r.sub.2), and a value at each target point together with a connection curve between target points. A speech rate is defined by a speech rate curve which defines elongation or shortening of the speech rate, by start point (d.sub.1) of elongation (or shorteninng), end point (d.sub.2), and elongation ratio between d.sub.1 and d.sub.2. The ratios between the relative time of each speech parameter and absolute time are preliminarily calculated according to the speech rate table in each predetermined short interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.