Audio signal processing apparatus and a sound emission apparatus
US10405089B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 12, 2018 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Feb 12, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2205/024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio signal processing apparatus for processing an input audio signal is provided, the apparatus comprising a plurality of filters, each filter configured to filter the input audio signal to obtain a plurality of filtered audio signals, each filter designed according to an extended mode matching beamforming applied to a surface of a half revolution, the surface partially characterizing a loudspeaker enclosure shape, a plurality of scaling units, each scaling unit configured to scale the plurality of filtered audio signals using a plurality of gain coefficients to obtain a plurality of scaled filtered audio signals, and a plurality of adders, each adder configured to combine the plurality of scaled filtered audio signals, thereby providing an output audio signal for producing a sound field having a beam directivity pattern defined by the plurality of gain coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.