METHOD AND APPARATUS FOR UPMIXING A TWO-CHANNEL AUDIO SIGNAL

摘要

An apparatus comprising at least one processor and at least one memory including computer program code The at least one memory and the computer program code is configured to, with the at least one processor, cause the apparatus at least to perform determining a covariance matrix for at least one frequency band of a first and a second audio signal, non-negative factorizing the covariance matrix to determine at least one first weighting value and at least one second weighting value associated with the at least one frequency band; and 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.