Method and apparatus of rejecting false hypotheses in automatic speech recognizer systems
US4896358A · kind A · utility
28Cited by
8References
2Claims
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Key dates
| Filing date | Mar 17, 1987 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Mar 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An automatic speech recognition system employs parallel syntaxes with a first syntax operative to compare keyword templates with incoming speech over a given time interval and with a second syntax in parallel with the first and operative to compare filler templates with incoming speech over the same interval. Based on the best comparisons in each syntax a likelihood probability ratio is computed and compared against a selected threshold for determining whether the speech contains a valid phrase or keyword as compared to an undesirable utterance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.