FIELD: physics.
SUBSTANCE: invention relates to means for estimating background noise in an audio signal. At least one parameter associated with an audio signal segment, such as a frame or a frame portion, is obtained based on: a first linear prediction gain coefficient, calculated as a ratio between a residual signal from linear prediction of 0th order and a residual signal from linear prediction of the second order for the audio signal segment; and a second linear prediction gain calculated as the ratio between the residual signal from 2-order linear prediction and the residual signal from 16th order linear prediction for the audio signal segment. It is determined whether the segment of the audio signal has a pause based on the obtained at least one parameter. Update the background noise estimate based on the audio signal segment when the audio segment is paused.
EFFECT: technical result consists in improvement of evaluation accuracy, whether audio signal contains active speech or music.
15 cl, 25 dwg
