Noise compensation arrangement
US4720802A · kind A · utility
79Cited by
6References
27Claims
0Family size
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Key dates
| Filing date | Jul 26, 1983 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Jul 26, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Adaptive speech recognition is improved by extracting an estimate of the background noise during unknown speech input, and using the noise estimate to modify the noiseless prestored reference speech signals for comparison with the input. Averaged values of autocorrelation coefficient and Toeplitz matrix elements representative of noise frames and prestored reference frames are used to calculate the LPC predictor signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.