Voice recognition method
US5241649A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1990 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Dec 17, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a voice recognition method, a d-by-J demensioned reference voice pattern is prepared for each target word, when J denotes a predetermined number of frames and d denotes a predetermined number of characterizing parameters per frame. A spoken input word is partitioned between its start and end points into J frames, and d characteristic parameters are extracted for each frame to form a d-by-J demensioned input time-series vector. The resemblance between the input vector and each of the reference voice patterns is then calculated using a statistical distance scale, and the spoken word is identified with the reference pattern providing the highest resemblance. The method requires fewer calculations and yet attains a high recognition rate through the normalization of the input voice word for both spectrum and time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.