AUDIO ENCODER AND DECODER USING FREQUENCY DOMAIN PROCESSOR WITH FULL-BAND GAP FILLING AND TIME DOMAIN PROCESSOR Russian patent published in 2018 - IPC G10L19/18 G10L19/02 G10L19/28 G10L21/38 

FIELD: acoustics.

SUBSTANCE: invention relates to encoding and decoding of audio signals. Audio encoder comprises: a first encoding processor for encoding a first audio signal portion in a frequency domain comprising a time frequency converter for converting the first audio signal portion into a frequency domain representation; an analyser for analysing the frequency domain representation to determine first and second spectral portions to be encoded with a first spectral resolution and a second spectral resolution, respectively, the second spectral resolution being lower than the first spectral resolution; a spectral encoder for encoding the first and second spectral portions with the first and second spectral resolution, respectively; a second encoding processor for encoding a second audio signal portion in the time domain; a controller configured for analysing the audio signal and for determining, which portion of the audio signal is the first audio signal portion and the second audio signal portion encoded in the frequency domain and in the time domain, respectively; and an encoded signal former for forming an encoded audio signal comprising a first and a second encoded signal portion for the first and second audio signal portion, respectively.

EFFECT: improving audio signal quality.

21 cl, 25 dwg