Method of and apparatus for speech recognition wherein decisions are made based on phonemes
US5131043A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1989 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Nov 20, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2015/025
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Linear prediction coefficients of a speech signal including unknown words are derived for each of successive periodic frame intervals. For every frame over the duration of an individual phoneme of the speech signal, the degree of similarity of stored coefficients of known words and derived coefficients of the unknown words are calculated so that at the end of the individual phonemes, the degree of similarity is calculated. Phoneme segmentation data are derived in response to the speech signal and combined with the calculated degree of similarity over the individual phoneme to derive phoneme strings of the speech signal. The derived and stored phoneme strings are compared to indicate the words stored in a word dictionary having the greatest similarity with the derived phoneme strings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.