Speech recognition system
US4852172A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1986 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Sep 2, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/07
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech recognition system for recognizing the words spoken by identified speakers and unidentified speakers, based upon the use of three dimensional, polar coordinate expressions of formant information, which eliminate the differences in word patterns encountered among various speakers, and the content of a reference pattern memory which stores formant information as a reference pattern in polar coordinates. The input speech is subjected to LPC analysis for each of several analysis degrees and the resulting coefficients are time normalized against the reference pattern using a DP matching process, which may be on the basis of city block distances in order to determine the most appropriate analysis degree that represents the input speech.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.