DECODER FOR FORMATION OF AUDIO SIGNAL WITH IMPROVED FREQUENCY CHARACTERISTIC, DECODING METHOD, ENCODER FOR FORMATION OF ENCODED SIGNAL AND ENCODING METHOD USING COMPACT ADDITIONAL INFORMATION FOR SELECTION Russian patent published in 2018 - IPC G10L21/388 G10L25/69 

FIELD: data processing.

SUBSTANCE: invention relates to means for encoding an audio signal. Extract the property from the base signal. Extract additional information for the selection associated with the base signal. Form a parametric representation for estimating the spectral range of an audio signal with an improved frequency response that is not defined by the base signal. Provide a number of alternative parametric representations in response to the mentioned property, and choose one of the alternative parametric representations as a parametric representation in response to additional information for selection. Audio signal with improved frequency response is evaluated using the selected parametric representation. When forming the parametric representation, the parametric information of improving the frequency response associated with the base signal is received.

EFFECT: technical result is to improve the efficiency of audio data encoding.

17 cl, 16 dwg