DECORRELATOR STRUCTURE FOR PARAMETRIC RECOVERY OF SOUND SIGNALS Russian patent published in 2018 - IPC G10L19/08 H03M7/30 

FIELD: physics.

SUBSTANCE: coding system encodes multiple audio signals (X) as a downmix signal (Y) together with the coefficients (P, C) of the controlled and forward up-mix. In the decoding system, the pre-multiplying unit calculates the intermediate signal (W) by linear mapping the downmix signal in accordance with the first set of coefficients (Q); the decorrelating section outputs the decorrelated signal (Z) based on the intermediate signal; the controllable up-mixer section calculates a controlled up-mix signal; the forward-up-mixing section calculates the up-mix signal; the summation section provides a multidimensional reconstructed signal ( ) by summing the signals of the controlled and forward up-mix; and the converter calculates the first set of coefficients based on the coefficients of the controlled and forward up mix and feeding it to the pre-multiply block.

EFFECT: improving the accuracy of the audio signal recovery.

18 cl, 4 dwg