Patent ID: 8374365
Filing Date: 2013-02-12
Classification: G10L,H04S

Abstract:
1. A method of generating an audio output signal having at least first and second audio output channels from a time-frequency signal representation of an audio input signal having at least one audio input channel and at least one spatial information input channel, comprising: selecting a spatial audio output format such that a direction in the audio output signal is characterized by at least one of an inter-channel amplitude difference and an inter-channel phase difference at each frequency between the at least first and second audio output channels; receiving directional information corresponding to each of a plurality of frames of the time-frequency signal representation, wherein directional information is derived by decomposing the audio input signal into primary and ambient components and performing a spatial analysis on at least a time-frequency representation of the primary components; and generating first and second frequency domain output signals from the directional information and the time-frequency signal representation that, at each time and frequency, have inter-channel amplitude and phase differences between the at least first and second audio output channels that characterize a direction in the spatial audio output format.