False alarm reduction in speech recognition systems using contextual information
US9646605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2013 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Oct 23, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2015/088
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method are presented for using spoken word verification to reduce false alarms by exploiting global and local contexts on a lexical level, a phoneme level, and on an acoustical level. The reduction of false alarms may occur through a process that determines whether a word has been detected or if it is a false alarm. Training examples are used to generate models of internal and external contexts which are compared to test word examples. The word may be accepted or rejected based on comparison results. Comparison may be performed either at the end of the process or at multiple steps of the process to determine whether the word is rejected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.