APPARATUS AND METHOD FOR GENERATING AN ADAPTIVE SPECTRAL SHAPE OF COMFORT NOISE Russian patent published in 2018 - IPC G10L19/05 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustics, in particular to audio signal decoding devices. Apparatus comprises a reception interface for receiving audio information frames, a coefficient generator, and signal recovery means. Coefficient generator is configured to check the current frame based on the signal coefficients. And the coefficients contain information about the sound signal and the shape of the noise spectrum. Coefficient generator is configured to generate the coefficients of the second audio signal depending on the number of coefficients of the first audio signal and depending on the noise coefficients. Audio signal restoration means is arranged to recover the first part of the audio signal based on the audio signal coefficients. In addition, the audio restoration means is configured to recover a second portion of the audio signal in dependence of the second audio signal coefficients, if the current frame is not received by the receive interface or if the current frame received using the receive interface is corrupted. Coefficients of the linear prediction filter are used, which contain information on the spectral pairs of immittance.

EFFECT: technical result is an increase in the efficiency of eliminating errors in the transmission of information.

13 cl, 17 dwg, 2 tbl