MULTI-CHANNEL DECORRELATOR, MULTI-CHANNEL AUDIO DECODER, MULTI-CHANNEL AUDIO ENCODER, METHODS AND COMPUTER PROGRAM USING PREMIX OF DECORRELATOR INPUT SIGNALS Russian patent published in 2018 - IPC G10L19/08 H04S3/00 

FIELD: electrical communication equipment.

SUBSTANCE: invention relates to means for audio encoding and audio decoding. First set of N decorrelator input signals is pre-mixed into a second set of K decorrelator input signals, where K<N. First set of K' decorrelator output signals is provided based on the second set of K decorrelator input signals. First set of K' decorrelator output signals are up-mixed to a second set of N' decorrelator output signals, where N'>K'. First set of N decorrelator input signals is pre-mixed to the second set of K decorrelator input signals using pre-mixing matrix M_pre. First set of K' decorrelator output signals is obtained based on the second set of K decorrelator input signals. First set of K' decorrelator output signals is up-mixed to a second set W of N' decorrelator output signals using post-mixing matrix M_post.

EFFECT: technical result is higher efficiency of coding three-dimensional audio scenes.

54 cl, 50 dwg