Method of recognizing speech pauses

Details Method of recognizing speech pauses Method of recognizing speech pauses

1983-11-17

1987-07-21

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 500

Patent

active

046823611

ABSTRACT:
A method of recognizing speech pauses in a speech signal even when the signal is disturbed by a slowly varying noise signal superposed thereon. Mean values which are an approximate measure of the average power of successive sections of the disturbed signal are determined from the short-time Fourier coefficients of the disturbed speech signal. The sequential short-time mean values are then smoothed by a linear digital filter or a median filter. An estimate of the noise signal power averaged over a few seconds is also recovered from the sequence of short-time mean values. A speech pause is signified when the smoothed short-time mean value (output of GL) more than once falls to a threshold which is proportional to the estimated noise power (output of PA).

REFERENCES:
patent: 3507999 (1970-04-01), Schroeder
patent: 4052568 (1977-10-01), Jankowski
patent: 4357491 (1982-11-01), Daaboil et al.
patent: 4535473 (1985-08-01), Sakata
patent: 4597098 (1986-06-01), Noso et al.

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