US 4720802
NOISE COMPENSATION ARRANGEMENT
Assignee
SANYO ELCTRIC CO., LTD.
Filed
Jul 26, 1983
Granted
Jan 19, 1988
Location
Arlington VA (defense contractors)
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: Google Patents
35 USC §181 Secrecy Order
Imposed
Nov 7, 1983
Rescinded
Nov 7, 1984
Duration
1 year
Inventor
- 1JOHN N. DAMOULAKIS
Sensitive facility: Arlington VA (defense contractors)
Record Details
- Patent number
- US 4720802
- Application
- 06517462
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
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SANYO ELCTRIC CO., LTD.Back to patent indexSource: USPTO 35 USC §181 secrecy order records