Multi-channel audio converter

摘要

A method and audio converter for generating further audio signals (u, ul, ur, uc, us) from initial audio signal (x, xl, xr), wherein optionally an information signal (in means 23) is derived from said initial audio signals (x). On basis of the initial audio signal (x, xr, xl), a dominant signal y(k) and a residue signal (or signals) q(k), substantially transverse to each other, are determined (means 21 and 22). In at least two frequency ranges frequency components of the dominant signal are analysed (means 24), and a difference signal yr ({y(k)-yb(k)) corresponding to the dominant signal minus a frequency range component of the dominant signal in one or more frequency ranges (yb(k)) is formed. The difference audio signal yr and the residue signal q(k) are transformed into said further audio signal u (means 25), i.e. 1 $u=T\left(\begin{array}{c}{y}_r\left(k\right)\\ q\left(k\right)\end{array}\right).$ Preferably in said means (25) the frequency range component is also transformed differently from the difference signal yr, 2 $\underset{\_}{u}=T(\begin{array}{c}{y}_r\left(k\right)\\ q\left(k\right)\end{array}$