ENCODING AND DECODING OF PARAMETERS Russian patent published in 2023 - IPC G10L19/08 G10L19/08 

FIELD: audio encoding.

SUBSTANCE: first component of the synthesis signal is synthesized according to a first mixing matrix calculated from a covariance matrix associated with the synthesis signal and a covariance matrix associated with the downmix signal. Upmixing of the downmix signal from said number of downmix channels into a number of synthesis channels is performed. The upmixed prototype signal is decorrelated. The second component of the synthesis signal is synthesized according to the second mixing matrix from a decorrelated version of the downmixing signal, the second mixing matrix being a residual mixing matrix. This involves calculating the second mixing matrix from a residual covariance matrix provided by the first mixing matrix processing step and estimating a decorrelated prototype signal covariance matrix obtained from a covariance matrix associated with the downmix signal.

EFFECT: increased efficiency of audio encoding.

13 cl, 27 dwg