Patent ID: 8626321
Filing Date: 2014-01-07
Classification: H04R,H04S

Abstract:
1. A method comprising processing an audio input signal represented as digital samples to produce a stereo output signal having a left field and a right field, said stereo output signal emulating the production of said audio input signal from a virtual audio source location relative to a listening location said listening location having a left listening position and right listening position corresponding to the left and right ears of a typical listener, using audio processing apparatus having a processing device, a first input device, a second input device and an output device, said method comprising the steps of: receiving by said first input device said audio input signal: receiving by said second input device an indication of a virtual audio source location relative to a listening location (an indicated location), receiving by said second input device an indication of distance between said left listening position and said right listening position, determining by said processing device said left and right listening positions based on said listening location and said indication of distance: determining by said processing device a first direction from said indicated location to said left listening position and a second direction from said indicated location to said right listening position; selecting by said processing device a left field broadband response file (a selected left field response file) from a plurality of stored files derived from empirical testing, said selected left field response file describing the impulse response of a left ear to a sound emitted from said first direction; selecting by said processing device a right field broadband response file (a selected right field response file) from a plurality of stored files derived from empirical testing, said selected right field response file describing the impulse response of a right ear to a sound emitted from said second direction: convolving by said processing device said audio input signal with said selected left field response file to produce the left field of said stereo signal output signal, convolving by said processing device said audio input signal with said selected right field response file to produce the right field of said stereo output signal, and supplying said stereo output signal to said output device.