Patent ID: 8295496
Filing Date: 2012-10-23
Classification: H04S

Abstract:
1. A method for processing two input audio channels to provide n output audio channels where n>2, comprising: dividing the first input channel signal and the second input channel signal into a plurality of corresponding non-bass frequency bands; processing according to a first process a first input channel first frequency band audio signal to provide a first portion of a first frequency band of a center output channel signal; processing according to a second process a second input channel first frequency band audio signal to provide a second portion of the first frequency band of the center output channel signal; processing according to a third process a first input channel second frequency band audio signal to provide a first portion of a second frequency band of the center output channel signal; and processing according to a fourth process a second input channel second frequency band audio signal to provide a second portion of the second frequency band of the center output channel signal; processing according to a fifth process the first input channel first frequency band audio signal to provide a first portion of a first frequency band of a non-center output channel signal; and processing according to a sixth process the first input channel second frequency band audio signal to provide a first portion of a second frequency band of the non-center output channel signal; wherein the third process is different from the first process and the second process and wherein the fourth process is different from the first process and the second process, wherein the fifth process is different from the sixth process, wherein the first process comprises scaling the first input channel first frequency band audio signal by a factor a, and wherein the fifth process comprises scaling the first input channel first frequency band audio signal by a factor √{square root over (1−a