Speech signal processing device with continuous monitoring of si

Details Speech signal processing device with continuous monitoring of si Speech signal processing device with continuous monitoring of si

1994-09-19

1996-11-05

MacDonald, Allen R.

G10L 302

Patent

active

055726216

ABSTRACT:
A mobile radio set includes a speech processing device for processing digital samples (x(i)) of speech signals which have noise components as well as speech components. Such device includes a control unit for continuously forming estimates of the signal-to-noise ratio of the speech signals by determining and smoothing the power values of the samples thereof, and determining the minimum of each successive group of L smoothed power values. The groups uninterruptedly succeed each other and each contains a sufficient number of smoothed power values so that all the values of a single group associated with a random phoneme of the speech signal can be combined. An estimate of the present signal-to-noise ratio is formed based on the present smoothed power value and the most recently determined minimum successive smoothed power value.

REFERENCES:
patent: 5208864 (1993-05-01), Kaneda
D. M. Etter et al, "Adaptive Estimation of Time Delays in Sampled Data Systems", IEE Transactions, vol. ASSP 29, No. 3, Jun. 1981, pp. 582-587.
Boudreau et al., "Joint Time-Delay Estimation and Adaptive Recusive Least Squares Filtering, IEEE Transactions on Signal Processing", vol. 4, No. 2, Feb. 1993.
Ho et al., "Adaptive Time Delay Estimation In Noisy Environments", IEEE 1991.
Ho et al., "Adative Time Delay Estimation In Nonstationary Signal And/Or Noise Power Environments", IEEE Transaction on Signal Processing, vol. 4, No. 7, Jul. 1993.

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