NOISE FILLING IN AUDIO CODING WITH PERCEPTION TRANSFORMATION Russian patent published in 2017 - IPC G10L19/28 G10L19/12 G10L19/24 G10L19/02 

FIELD: physics.

SUBSTANCE: audio decoder with perceptual transformation comprises: a noise filling module, a noise generating module of frequency area, wherein the noise generating module of frequency area is configured to: determine the spectral perceptual weighting function from the information of linear prediction coefficients, signaled in the data stream, in which the spectrum is encoded, or to determine the perceptual spectral weighting function of the scaling coefficients relating to the range of the scaling coefficients signaled in the data stream, in which the spectrum is encoded. The noise filling module is configured to: generate an intermediate noise signal; to identify continuous spectral zero parts of the audio signal spectrum; to determine the function for each continuous spectral zero part depending on the width of the corresponding continuous spectral zero part, the spectral position of the corresponding continuous spectral zero part; and to generate an intermediate noise signal.

EFFECT: improving the audio quality after the spectrum is filled with noise.

26 cl, 23 dwg