Speech recognition in selective call systems
US5719996A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/144
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A selective call communication system (100) has a speech recognition system using an acoustic space (400) which has a plurality of probability density functions (pdfs). The selective call communication system (100) has an acoustic space generator (136) for representing speech in the acoustic space (400) which has a plurality of regions (1-14) having a subset of the plurality of probability density functions (502-516). The selective call communication system (100) has a tree generator (138) for generating a hierarchical tree structure (500) representing the subset of the plurality of probability density functions (502-516) associated with the plurality of regions (1-14), a score computer (132) for determining a region of the plurality of regions (1-14) indicative of a minimum distance to a center of the region for a speech sample received, and a speech recognizer (130) for calculating the probability density functions of the region for recognizing the speech sample received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.