FIELD: information technology.
SUBSTANCE: invention relates to a coding/decoding method and device, more specifically to a coding/decoding device which processes an audio signal in order to create three-dimensional (3D) sound effects. The decoding method involves extraction of a step-down mixing 3D signal and spatial information from an input bit stream; removal of 3D effects from the step-down mixing 3D signal by performing 3D reproduction operations on the said 3D signal; and generation of a multichannel signal using the spatial information and step-down mixing signal obtained from said removal.
EFFECT: possibility of efficiently coding mutichannel signals with 3D effects and additively restore and playback audio signals with optimum audio quality in accordance with characteristics of the playback medium.
11 cl, 16 dwg
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