Virtualizer with cross-talk cancellation and reverb

Abstract

Audio loudspeaker and headphone virtualizers and cross-talk cancellers and methods use separate virtual speaker locations for different Bark frequency bands and a single reverberation filter for multi-channel virtualizer inputs.

1 . A method of multi-channel audio processing, comprising:
 (a) providing multi-channel virtualizer filters for multi-channel audio inputs;   (b) wherein each of said filters has two modes of operation: a first mode for systems including cross-talk cancellation filtering and a second mode for systems without cross-talk cancellation filtering;   (c) whereby said first mode can be used in systems with speakers and said second mode can be used in systems with headphones.   
     
     
         2 . The method of  claim 1  wherein:
 (a) a first and a second of said filters in said first mode have transfer functions Fleft and Fright, respectively; and 
 (b) said first and second filters in said second mode have transfer functions (Hshort Fleft−Hlong Fright)/(Hshort 2 −Hlong 2 ) and (Hshort Fright−Hlong Fleft)/(Hshort 2 −Hlong 2 ), respectively, where Hshort and Hlong are the transfer function from a speaker to ears. 
 
     
     
         3 . The method of  claim 1  wherein said multi-channel audio inputs includes front left and right inputs, a front center input, and rear left and right inputs.