Patent ID: 9560464
Date: 2017-01-31
CPC Classifications: H04R,H04S

Claim:
1. A method of producing audio filters for processing audio signals to generate a head-externalized 3D audio image through headphones comprising the steps of: measuring an impulse response of a pair of speakers in a room with an impulse response measurement system using binaural microphones inserted in ears of a head, generating a Speaker+Room Binaural Impulse Response (SRbIR) filter from said impulse response having the specific property of including direct sound and reflected sound, said SRbiR filter being made up of four actual impulse responses; generating a spectrally uncolored crosstalk cancellation filter from a time-windowed version of said SRbIR filter that includes direct sound but excludes reflected sound; utilizing a processor to filter the audio signals through a combination of said SRbIR filter and said crosstalk cancellation filter to generate a stereo audio signal; and feeding the resulting stereo audio signal to headphones to provide the listener with an emulation of audio playback through crosstalk-cancelled speakers that gives the perception of a head-externalized 3D audio image.