FIELD: physics, acoustics.
SUBSTANCE: invention relates to means of estimating background noise in audio signals. A current estimate of the background noise is reduced when it is determined that a segment of an audio signal contains music and the current estimate of background noise exceeds a minimum value. This must be performed when the energy level of the segment of the audio signal is higher than a threshold, which exceeds a long-term minimum energy level, which is determined based on a plurality of previous segments of the audio signal, or when the energy level of the segment of the audio signal is below a threshold, which exceeds the long-term minimum energy level, but no pause is detected in the segment of the audio signal.
EFFECT: estimation of background noise with high accuracy of detection in a speech or music audio signal.
11 cl, 9 dwg
