FIELD: audio data processing.
SUBSTANCE: technical solution relates to the field of computer technology for processing audio data. Technical result is achieved by means of variants of an audio processor for processing audio signal, so as to obtain a sub-band representation of the audio signal with the possibility of performing a cascade overlapping critically sampled conversion, for partially overlapping audio signal sample blocks; wherein the cascade overlapping critically sampled conversion includes segmentation of a set of resolution elements; wherein the cascade overlapping critically sampled conversion with segmentation of a set of resolution elements where sets of resolution elements are processed with a second overlapping critically sampled conversion from a cascading overlapping critically sampled conversion.
EFFECT: reduction in the spectral overlap in the time domain of the audio signal due to the discarded redundant and perceptually irrelevant information.
26 cl, 27 dwg
