FIELD: acoustics.
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 portion of a frame, is obtained, based on: a first linear prediction gain coefficient calculated as the ratio between the residual signal from the linear prediction of the 0th order and the residual signal from the 2-order linear prediction for the audio signal segment; and a second linear prediction gain calculated as the ratio between the residual signal from the 2-order linear prediction and the residual signal from the 16th-order linear prediction for the audio signal segment. It is determined whether the audio signal segment contains 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 increasing the accuracy of the estimation, whether the audio signal contains active speech or music or not.
23 cl, 24 dwg
