Speech recognition apparatus and method utilizing an orthogonalized dictionary
US5001760A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1988 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Oct 6, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An orthogonalizing time filter section is arranged in place of a Gram Schmidt orthogonalizing section. The orthogonalizing time filter section is constituted by a plurality of filters for performing smoothing processing and differential processing. The orthogonalizing time filter section obtains an average pattern of acquired learning patterns, and smoothes the average pattern along the time base to obtain a dictionary of a first axis. The section differentiates the average pattern along the time base to obtain a dictionary of a second axis. The above processing is repeated for each category, thus generating an orthogonalized dictionary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.