FIELD: data processing.
SUBSTANCE: invention relates to means of encoding and decoding an encoded audio signal. Device for decoding an encoded signal comprises: audio decoder in a spectral region to generate a first decoded representation of a first set of first spectral parts representing residual spectral prognostic values; repeated frequency generating module for generating a restored second spectral part using the first spectral part from the first set of the first spectral parts, restored second spectral part additionally comprises residual spectral prognostic values; and backward predictive filter for inverse frequency prediction using residual spectral values for the first set of the first spectral parts and the restored second spectral part using information of the predictive filter included in an encoded audio signal.
EFFECT: technical result is improved encoding/decoding principle, allowing reducing bit rate.
20 cl, 41 dwg
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