Adaptive Filters Approach to 3D Sound Systems
The control filters in loudspeaker displays must implement both binaural synthesis and cross-talk cancellation functions as discussed in Section 2.2. The cross-talk cancellation subsystem is an inverse of an often non-minimum phase and ill-conditioned matrix of electro-acoustic transfer functions. An exact solution to the cross-talk canceller is difficult to calculate and in some cases, may not be possible at certain frequencies. Alternative to exact direct inversion, a statistical least mean square solution may be obtained for the matrix inverse. The advantage of such an approach is that it can be made adaptive, so that the filters can be designed in-situ. Such an adaptive solution also offers the possibility to track and correct the filters when changes in the electro-acoustic system occur. This chapter discusses theoretical and implementation issues concerning adaptive 3D sound systems.
KeywordsAttenuation Convolution Lution Crosscorrelation
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