Phonemic classification in speech recognition system having accelerated response time
US4937869A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1985 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Feb 28, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An acoustic processing unit for a speech recognition system is characterized in that the parameters are extracted from the speech data, including correlation functions, the zero crossing number of the original waveforms, the zero crossing number of the differential waveforms, and the average level of the waveforms. A suitable threshold is selected from a plurality of thresholds preliminarily stored, depending on the inputted speech volume level. The inputted speech volume level of the speaker is detected so that feedback of the detected volume level is obtained. The selected threshold set is then compared with each of the parameters to thereby make the phonemic classification. Because the plurality of threshold sets are thus automatically selected depending on the inputted speech volume level, flexible phonemic classification can be obtained to exactly detect the speech sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.