Multi-channel audio converter

Details Multi-channel audio converter Multi-channel audio converter

2005-04-19

2005-04-19

Isen, Forester W. (Department: 2644)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

C381S098000

Reexamination Certificate

active

06882731

ABSTRACT:
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 means23) 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 (means21and22). In at least two frequency ranges frequency components of the dominant signal are analysed (means24), 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 yrand the residue signal q(k) are transformed into said further audio signal u(means25), i.e.u=T⁡(yr⁡(k)q⁡(k)).Preferably in said means (25) the frequency range component is also transformed differently from the difference signal yr,u_=T⁡(yr⁡(k)q⁡(k))+M⁡(yb⁡(k)q⁡(k)),with TγM.

REFERENCES:
patent: 5796844 (1998-08-01), Griesinger
patent: 6496584 (2002-12-01), Irwan et al.
patent: 0757506 (1997-02-01), None

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