Processing of multi-channel signals

摘要

A method of generating a monaural signal (S) includes a combination of at least two input audio channels (L, R). Corresponding frequency components from respective frequency spectrum representations for each audio channel (L(k), R(k)) are summed to provide a set of summed frequency components (S(k)) for each sequential segment. For each frequency band (i) of each of sequential segment, a correction factor (m(i)) is calculated as function of a sum of energy of the frequency components of the summed signal in the band $\left(\sum _{k\in i}{S\left(k\right)}^2\right)$ and a sum of the energy of the frequency components of the input audio channels in the band $\left(\sum _{k\in i}\left\{{L\left(k\right)}^2+{R\left(k\right)}^2\right\}\right).$ Each summed frequency component is corrected as a function of the correction factor (m(i)) for the frequency band of the component.