Patent ID: 8467552

Claim:
A method for producing 3-D sound, comprising: storing a first left HRTF and a first right HRTF to produce a first 3-D sound to be perceived within a first source angle range; storing a first plurality of interaural time difference (ITD) values, said first plurality of ITD values specified at a selected source angle increment, each of said first plurality of ITD values for use at a unique source angle, specified at said selected source angle increment, within said first source angle range; storing a second left HRTF and a second right HRTF to produce a second 3-D sound to be perceived within a second source angle range, said first source angle range and said second source angle range not overlapping; storing a second plurality of ITD values, said second plurality of ITD values specified at said selected source angle increment, each of said second plurality of ITD values for use at a unique source angle, specified at said selected source angle increment, within said second source angle range; receiving a source angle specified at said selected source angle increment that is within said first source angle range; receiving, in a sound processor, an ITD value corresponding to the source angle that is from said first plurality of ITD values; retrieving said first left HRTF and said first right HRTF for generating a 3-D sound from an input sound; and, generating the 3-D sound for output as audible sound based on the retrieved said first left HRTF and said first right HRTF and the received ITD value corresponding to the source angle.