Speech recognition from overlapping frequency bands with output data reduction
US6721698B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2000 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Aug 9, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech recognition feature extractor includesa time-to-frequency domain transformer for generating spectral values in the frequency domain from a speech signal;a partitioning means for generating a first set and an additional set of spectral values in the frequency domain;a first feature generator for generating a first group of speech features using the first set of spectral values;a additional feature generator for generating an additional group of speech features using the additional set of spectral values; the feature generators arranged to operate in parallel,an assembler for assembling an output set of speech features from at least one speech feature from the first group of speech features and at least one speech feature from the additional group of speech features, and an anti-aliasing and sampling rate reduction block, where the first and the additional set of spectral values comprise at least one common spectral value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.