PRESENTATION OF MULTICHANNEL SOUND USING INTERPOLATED MATRICES Russian patent published in 2017 - IPC G10L19/08 H04S3/00 

FIELD: physics.

SUBSTANCE: method for encoding an N-channel audio program comprises the steps of: determining the first cascade of elementary matrices N×N, which, when applied to discrete values of N encoded signal channels, realizes the first mixing of audio content in M output channels. The first mixing corresponds to a time-varying mixing A(t); determining the interpolation values, which, together with the first cascade of elementary matrices and the interpolation function defined in the subinterval, indicate a sequence of stages of the updated elementary matrices N×N, so that each cascade of the updated elementary matrices, when applied to discrete values of N coded signal channels, implements updated mixing, N coded channel signals in M output channels; generating an encoded bit stream that indicates coded audio content, interpolation values, and the first cascade of elementary matrices.

EFFECT: elimination of unwanted artifacts in the encoding, decoding of the sound program.

59 cl, 8 dwg