AUDIO CODER, AUDIO DECODER AND RELATED METHODS USING TWO-CHANNEL PROCESSING IN INFRASTRUCTURE OF INTELLECTUAL FILLING INTERVALS OF SIGNAL ABSENCE Russian patent published in 2018 - IPC G10L19/08 H03M7/30 

FIELD: physics.

SUBSTANCE: device for generating a decoded two-channel signal comprises: an audio processor for decoding the encoded two-channel signal in order to obtain the first set of the first spectral portions; a parametric decoder for providing parametric data for the second set of the second spectral portions and a two-channel identifier identifying the first or the second other two-channel representation for the second spectral portions; and a frequency re-shaping unit for re-forming the second spectral portion, depending on the first spectral portion of the first set of the first spectral portions, the parametric data for the second portion, and the two-channel identifier for the second portion.

EFFECT: providing an extended bandwidth of the audio signal at low bit rates due to the increased compression efficiency.

22 cl, 41 dwg