Extracting formant-based source-filter data for coding and synthesis employing cost function and inverse filtering
US6195632A · kind A · utility
99Cited by
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8Claims
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Key dates
| Filing date | Nov 25, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Nov 25, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/15
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An iterative formant analysis, based on minimizing the arc-length of various curves, and under various filter constraints estimates formant frequencies with desirable properties for text-to-speech applications. A class of arc-length cost functions may be employed. Some of these have analytic solutions and thus lend themselves well to applications requiring speed and reliability. The arc-length inverse filtering techniques are inherently pitch synchronous and are useful in realizing high quality pitch tracking and pitch epoch marking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.