Methods, apparatus and systems for encoding and decoding of directional sound sources
US11887608B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 23, 2022 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Apr 23, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Some disclosed methods involve encoding or decoding directional audio data. Some encoding methods may involve receiving a mono audio signal corresponding to an audio object and a representation of a radiation pattern corresponding to the audio object. The radiation pattern may include sound levels corresponding to plurality of sample times, a plurality of frequency bands and a plurality of directions. The methods may involve encoding the mono audio signal and encoding the source radiation pattern to determine radiation pattern metadata. Encoding the radiation pattern may involve determining a spherical harmonic transform of the representation of the radiation pattern and compressing the spherical harmonic transform to obtain encoded radiation pattern metadata.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.