Fast and memory efficient encoding of sound objects using spherical harmonic symmetries
US10674301B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Aug 22, 2018 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Sep 2, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of encoding sound objects includes receiving a set of monophonic sound inputs. Each of the set of monophonic sound inputs includes position and orientation information of a sound object relative to a source position. The set of monophonic sound inputs are encoded into a higher order ambisonic (HOA) sound field in a spherical harmonics domain based on a spherical harmonics dataset including a subset of all spherical harmonic coefficients for a given subset of azimuth and elevation angles. Some embodiments include decoding the HOA sound field to generate a set of loudspeaker signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.