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 2019 - IPC G10L21/388 G10L25/69 

FIELD: data processing.

SUBSTANCE: invention relates to means for encoding and decoding an audio signal. Decoder for generating an audio signal with an improved frequency response comprises: block for extracting properties from the base signal; block for extracting additional information for selection associated with the base signal; parameter generator for forming 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, the parameter generator is configured to provide a number of alternative parametric representations in response to said property. Parameter generator is configured to select one of the alternative parametric representations in response to additional information for selection.

EFFECT: technical result consists in the creation of an improved concept of encoding/decoding audio data, allowing to reduce the speed of transmission of additional information for the directional decoding scheme.

17 cl, 16 dwg