Continuous speech recognition method for improving false alarm rates
US4241329A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1978 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Apr 27, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech recognition method for detecting and recognizing one or more keywords in a continuous audio signal is disclosed. Each keyword is represented by a keyword template representing one or more target patterns, and each target pattern comprises statistics of each of at least one spectrum selected from plural short-term spectra generated according to a predetermined system for processing of the incoming audio. The incoming audio spectra are compared with the target patterns of the keyword templates and candidate keywords are selected according to a predetermined decision process. In post-decision processing, concatentation techniques, based upon a likelihood ratio test, for rejecting false alarms are disclosed. Post-decision processing can include also a prosodic test to enhance the effectiveness of the recognition apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.