Patent ID: 8488798
Filing Date: 2013-07-16
Classification: H04S

Abstract:
1. An audio matrix decoding method receiving a stereo signal pair Lt, Rt, in which method the relative amplitudes and polarities of the pair determine the reproduced direction of decoded signals, comprising panning Lt and Rt to outputs associated with front directions in response to a measure of the sum of Lt and Rt being greater than a measure of the difference between Lt and Rt, and panning Lt and Rt to outputs associated with rear directions in response to a measure of the sum of Lt and Rt being less than a measure of the difference between Lt and Rt, and modifying the stereo signal pair Lt and Rt to shift the direction of reproduced signals by forming a difference signal of Lt and Rt signals, scaling said difference signal by a bias gain factor, and summing said scaled difference signal to both Lt and Rt signals to produce modified Lt and Rt signals such that the relative amplitudes and polarities of the modified Lt and Rt pair determine the reproduced direction of decoded signals.