Interference reduction system for a speech recognition device
US5241692A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Feb 19, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for reducing audio interference produced by a transducer (18) in response to an audio signal has a first input for receiving the audio signal and a second input (22) for receiving sound signals. The audio interference affects a speech recognition system (34). The second input provides a possibly contaminated signal representing the sound signals. The sound signals comprise a desired audio signal, and possibly comprise the audio interference. An interference reduction device (30) is coupled to the first and second inputs, for transforming the possibly contaminated signal into features that are substantially free from the effects of the audio interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.