Speech pattern matching in non-white noise
US5487129A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Jun 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for matching an input signal, comprising non-white noise and a patterned signal corrupted by said non-white noise, to a plurality of reference signals, the system including an estimator estimating noise features of said non-white noise and producing from the noise features at least one noise whitening filter; a filter generally simultaneously filtering the input signal and the plurality of reference signals using the noise whitening filter and producing a filtered input signal, having a white noise component, and a plurality of filtered reference signals; and a pattern matcher generally robust to white noise for matching the filtered input signal to one of the filtered reference signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.