Method and apparatus for speech generation from phonetic codes
US5463715A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1992 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Dec 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L13/07
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Speech generation from phonetic code is carried out by a microcomputer based system which stores digitized waveform segments and appropriately joins the segments and outputs them to a digital to analog converter and then to a speaker. An allophone is generated for each phoneme designated by the phonetic codes according to the articulation type of each adjacent phoneme. Each phoneme is classified as neutral, labial, glottal, or medial according to its effect on the articulation of adjacent phonemes. Each phoneme is characterized by at least one center waveform dependent on the phonetic code, and an initial waveform and a final waveform, each of which depend on the phonetic code and the articulation type of the neighboring phoneme. Tables of waveform pointers are accessed according to phonetic code and articulation type, and other tables provide articulation types, times of each waveform portion, transition rate, fricative state, and pitch for each phonetic code. Adjacent waveforms are gradually blended together. Continuously varying center waveforms are afforded by indexing through successive waveform pointers at a given rate during the center phoneme period, the rate and the period…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.