Patent ID: 9313598
Filing Date: 2016-04-12
CPC Classification: G10L,H04S

Claim Text:
1. A method comprising: determining a covariance matrix for at least one frequency band of a first and a second audio signal, wherein the covariance matrix comprises a cross correlation coefficient between the first and the second audio signal; non-negative factorizing the covariance matrix, based on the cross correlation coefficient, to determine at least one first weighting value and at least one second weighting value associated with the at least one frequency band based on the cross correlation coefficient; determining a third audio signal associated with the at least one frequency band by combining the first weighting value and the first audio signal to the second weighting value and the second audio signal, and generating a plurality of channels from the first weighting value and the second weighting value corresponding to the non-negative factorized covariance matrix.