Virtual height filter for reflected sound rendering using upward firing drivers
US9648440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2014 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Jan 15, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2205/024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments are directed to speakers and circuits that reflect sound off a ceiling to a listening location at a distance from a speaker. The reflected sound provides height cues to reproduce audio objects that have overhead audio components. The speaker comprises upward firing drivers to reflect sound off of the upper surface and represents a virtual height speaker. A virtual height filter based on a directional hearing model is applied to the upward-firing driver signal to improve the perception of height for audio signals transmitted by the virtual height speaker to provide optimum reproduction of the overhead reflected sound. The virtual height filter may be incorporated as part of a crossover circuit that separates the full band and sends high frequency sound to the upward-firing driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.