Waveform synthesis
US7069217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1997 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | Jan 9, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L13/07
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A synthesizer is disclosed in which a speech waveform is synthesized by selecting a synthetic starting waveform segment and then generating a sequence of further segments. The further waveform segments are generated based jointly upon the value of the immediately-preceding segment and upon a model of the dynamics of an actual sound similar to that being generated. In particular, a method is disclosed of a voiced speech sound comprising calculating each new output value from the previous output value using data modeling the evolution, over a short time interval, of the voiced speech sound to be synthesized. This sequential generation of waveform segments enables a synthesized sequence of speech waveforms to be generated of any duration. In addition, a low-dimensional state space representation of speech signals are used in which successive pitch pulse cycles are superimposed to estimate the progression of the cyclic speech signal within each cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.