SYSTEMS AND METHODS FOR SMOOTHING COVARIANCE Russian patent published in 2024 - IPC G10L21/208 

FIELD: audio signal processing.

SUBSTANCE: invention relates to audio signal processing. Technical result is achieved by calculating the forcing factor for the frequency band as the ratio of the effective amount to the required amount; and for each frequency band of a plurality of frequency bands, generating a corresponding smoothed covariance matrix for a specific band for a current signal frame using a previously generated value of the corresponding smoothed covariance matrix for a specific band for a previous signal frame with respect to the current signal frame and a loss factor; and generating an audio signal for an audio service using frequency-domain representations of a sequence of signal frames in the time domain and further use of corresponding sets of corresponding smoothed covariance matrices for a specific band, wherein comparison, calculation and formation are performed by a system comprising one or more computer processors.

EFFECT: preventing excessive smoothing of values of audio signals and thereby preventing the addition of undesirable artefacts due to smoothing of audio signals.

24 cl, 7 dwg