Fast and accurate extraction of formants for speech recognition using a plurality of complex filters in parallel
US8311812B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2009 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Feb 10, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/15
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for determining an instantaneous frequency and an instantaneous bandwidth of a speech resonance of a speech signal. The method includes receiving a speech signal having a real component; filtering the speech signal so as to generate a plurality of filtered signals such that the real component and an imaginary component of the speech signal are reconstructed; and generating a first estimated frequency and a first estimated bandwidth of a speech resonance of the speech signal based on both a first filtered signal of the plurality of filtered signals and a single-lag delay of the first filtered signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.