GENERATION OF A COMFORT NOISE WITH HIGH SPECTRO-TEMPORAL RESOLUTION IN DISCONTINUOUS TRANSMISSION OF AUDIO SIGNALS Russian patent published in 2018 - IPC G10L19/12 G10L19/02 G10L19/24 

FIELD: acoustics.

SUBSTANCE: invention relates to devices for generating comfort noise with high spectral-temporal resolution. Bitstream is decoded to receive an audio output signal from it. Bitstream contains an active phase, followed by an inactive phase. Bitstream has an encoded therein a silence insertion descriptor frame, which describes a spectrum of a background noise. Audio decoder comprises a silence insertion descriptor decoder configured to decode the silence insertion descriptor frame to reconstruct a spectrum of the background noise; a decoding device configured to reconstruct the audio output signal from the bitstream during the active phase; a spectral converter configured to determine a spectrum of the audio output signal, a noise estimator device; a resolution converter; a comfort noise spectrum estimation device and a comfort noise generator.

EFFECT: technical result is to improve the quality of the audio signal by adding a comfort noise.

19 cl, 5 dwg