Patent ID: 6307941
Filing Date: 2001-10-23
Classification: H04S

Abstract:
A method for producing an output audio signal perceived by a listener to originate from a virtual source, said method comprising the steps of:receiving an audio signal to be output on a speaker system at a position offset from the location of the virtual source;providing a spatial shift signal for modifying a spatial cue of the audio signal, wherein the spatial cue is selected from the group consisting of interaural time difference, interaural intensity difference and spectra;using the spatial shift signal to modify the spatial cue of the audio signal to produce a localized value for the spatial cue, wherein the localized value for the spatial cue approximates a value for the spatial cue that would be produced if the audio signal were actually output from the location of the virtual source;modulating the value of the spatial cue of the audio signal within a desired range around the localized value to enhance the ability of the listener to perceive the location of the virtual source; andoutputting the modified and modulated audio signal from the speaker system.