Method and apparatus for creating spatialized sound
US8638946B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 2004 |
| Grant date | Jan 28, 2014 |
| Priority date | — |
| Expiry date | Oct 21, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for creating spatialized sound, including the operations of determining a spatial point in a spherical coordinate system, and applying an impulse response filter corresponding to the spatial point to a first segment of the audio waveform to yield a spatialized waveform. The spatialized waveform emulates the audio characteristics of a non-spatialized waveform emanating from the chosen spatial point. That is, when the spatialized waveform is played from a pair of speakers, the played sound apparently emanates from the chosen spatial point instead of the speakers. A finite impulse response filter may be employed to spatialize the audio waveform. The finite impulse response filter may be derived from a head-related transfer function modeled in spherical coordinates, rather than a typical Cartesian coordinate system. The spatialized audio waveform ignores speaker cross-talk effects, and requires no specialized decoders, processors, or software logic to recreate the spatialized sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.