Time processed head related transfer functions in a headphone spatialization system
US6370256B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for implementing a Head Related Transfer Function on an input audio signal in a headtracked listening environment comprising: a series of principle component filters attached to the input audio signal and each outputting a predetermined simulated sound arrival; a series of delay elements each attached to a corresponding one of the principle component filters and delaying the output of the filter by a variable amount depending on a delay input so as to produce a filter delay output; a summation means interconnected to the series of delay elements and summing the filter delay outputs to produce an audio speaker output signal; headtrack parameter mapping unit having a current orientation signal input and interconnected to each of the series of delay elements so as to provided the delay inputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.