Patent ID: 7720237
Filing Date: 2010-05-18
Classification: H04S

Abstract:
1. A method for minimizing the spectral deviations in the cross-over region of a combined bass-managed subwoofer-room and bass-managed satellite-room response, the method comprising: defining at least one second order all-pass filter having all-pass filter coefficients selectable to reduce incoherent addition of acoustic signals produced by the subwoofer and the satellite speaker; recursively computing the all-pass filter coefficients to minimize a phase response error, the phase response error being a function of phase responses of a subwoofer-room response, a satellite-room response, and the subwoofer and satellite bass-management filter responses; and cascading the all-pass filter with at least one of the satellite speaker bass-management filter and subwoofer bass-management filter; wherein computing the all-pass filter coefficients comprises: