Speech message code modifying arrangement
US4709390A · kind A · utility
186Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1984 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | May 4, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Natural quality and bit-rate for LPC speech synthesis is improved by encoding the LPC residual signal in a prescribed multipulse format formed for each LPC frame. Voiced, unvoiced, and mixed (hiss plus periodic) excitation is inherent. The speaking-rate is changed by adding, deleting, or repeating pitch-periods, and the pitch (intonation) is changed by adding or deleting zeros in the multipulse excitation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.