Patent ID: 7929708
Filing Date: 2011-04-19
Classification: H04S

Abstract:
1. A system for converting from an N channel audio system to an M channel audio system, where N is an integer greater than M, comprising: one or more correlators that are each configured for receiving two of the N channels of audio data and time-shifting at least one of the N channels of audio data thereby eliminating time delays less than a predetermined level between the channels to generate correlated channels of audio data, where the time delays less than the predetermined level are below a level perceptible by human listeners; one or more phase shift systems, each configured for performing a phase shift on one or more of the correlated channels of audio data; and one or more summers configured for receiving at least one of the correlated channels of audio data and at least one of the phase shifted channels of audio data and generating one of the M channels of audio data.