Method and apparatus for speech recognition
US5062137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Power information from an input signal is used to detect the presence of speech. A reference point is established by the power information as the moment of detection of the start of speech. The end of a processing period for speech recognition is determined by a power information occurring after end of speech, so that feature parameters are extracted from the signal during the processing period having start and end points determined by the power information. Standard speech patterns of particular preset words are determined and similarities between the extracted feature parameters and the standard patterns are calculated and mutually compared. The selected preset word corresponds to a maximum of the similarities obtained during the processing period selected in accordance with the power information. The selected word is then outputted as the recognition result. Selection of the process time in accordance with the power information permits exclusion of some similarities in the speech recognition process, thereby preventing erroneous recognition which could occur in a long word having a portion similar to a short word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.