AUDIO SIGNAL ENCODER, AUDIO SIGNAL DECODER, METHOD FOR ENCODING OR DECODING AUDIO SIGNAL USING ALIASING-CANCELLATION Russian patent published in 2016 - IPC G10L19/00 G10L19/02 G10L19/04 

FIELD: acoustics.

SUBSTANCE: group of inventions relates to devices and methods of encoding and decoding audio signal with removal of aliasing (spectrum overlaying). Method includes steps of: transformation from time domain in frequency domain representation of input audio data to form in frequency domain representation of audio content; generation of spectrum frequency representation of audio or its pretreated modification depending upon set of linear prediction-domain parameters for fragment audio content which is encoded in area of linear prediction, to produce frequency representation of audio, calculated according to shape of spectrum; and generating signal representation stimulation results to obtain signal filtration stimulation results while taking into account at least some of multiple linear prediction-domain parameters alias-free signal synthesis with neutralisation of artefacts aliasing (spectrum overlaying) on side of audio decoder.

EFFECT: technical result consists in neutralization of artefacts of aliasing when passing through audio signal decoder.

18 cl, 25 dwg, 8 tbl