Method of recognizing speech pauses

Details Method of recognizing speech pauses Method of recognizing speech pauses

G - Physics

10

L

354/50

G10L 11/02 (2006.01)

Patent

CA 1203627

ABSTRACT Method of recognizing speech pauses. The described method of recognizing pauses in a speech signal enables -this recognition also when a slowly varying noise signal is superposed on the speech signal. For the purpose of pause recognition so-called short-time mean values connected with a clock pulse are continuously determined from the samples of the disturbed speech signal, which short time mean values are a measure of the average power of approximately 100 ms long sections of the disturbed speech signals. The sequence of these short-time mean values is then smoothed by linear filtra- tion or by means of a median filter. In parallel with the smoothing operation an estimate for the noise signal power averaged over a few seconds is taken from the sequence of short-time mean values. If the smoothed short time mean value is once or several times less than a threshold which is proportional to the above-mentioned estimate, then it is decided that there is a speech pause.

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