Abstract
A voice detector for detecting the presence of speech in an input signal having a noise component, comprising means (113) for storing a model of the noise component of the input signal, means (114, 115) for detecting spectral similarity of the input signal to a stored noise model for generating an output decision. signal, from the stored noise model update means (112) and the auxiliary detector (200) for controlling the update means (112) so that the update occurs only when the auxiliary detector (200) indicates that the input signal does not contain speech. The voice detector further comprises means (303) for calculating a predetermined gain parameter of the input signal and modifying means (304) for suppressing the update in case the predetermined gain exceeds a threshold value.
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| Not Available | 20/07/1995 | ISLD-190001-033 | LG |
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