Efficient pitch estimation method
US5946650A · kind A · utility
17Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jun 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and means to estimate the pitch of a speech or acoustic signal within a vocoder begins with the center clipping and low-pass filtering of the speech or acoustic signal to eliminate the formants from the speech or acoustic signal. An error function for each pitch is calculated for each pitch within the speech or acoustic signal. A fast tracking method is used to select the estimated pitch for the pitch or acoustic signal. A final check for the doubling of the pitch will minimize any incorrect estimation of the pitch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.