Pitch synchronized sinusoidal synthesizer
US6029133A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1997 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Sep 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/125
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A pitch synchronous sinusoidal synthesizer for multi-band excitation vocoders will produce excitation signals necessary to artificially mimic speech from input data. The input data will contain the pitch frequencies for current and previous synthesizing frame samples, starting phase information for all harmonics within the current synthesizing frame sample, magnitudes for each of the harmonics present within the current synthesizing frame sample, the voiced/unvoiced decisions for each of the harmonics within the current frame sample, and an energy description for the harmonics of the current synthesizing frame sample. The pitch synchronous sinusoidal synthesizer will produce the synthetic speech with a minimum of the distortion caused by the sampling and regeneration of the speech excitation signals. The pitch synchronized sinusoidal synthesizer has a plurality of pitch interpolators. The pitch interpolators will calculate the pitch periods and frequencies, the pitch magnitudes of all harmonics present in the frame sample, and the ending phase for each pitch period. The results from the interpolator are transferred to a bank of sinusoidal resonators. The sinusoidal resonators will …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.