Method and apparatus for playback of a higher-order ambisonics audio signal
US9451363B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2013 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | May 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An advantage of Ambisonics representation is that the reproduction of the sound field can be adapted individually to nearly any given loudspeaker position arrangement. The invention allows systematic adaptation of the playback of spatial sound field-oriented audio to its linked visible objects, by applying space warping processing as disclosed in EP 11305845.7. The reference size (or the viewing angle from a reference listening position) of the screen used in the content production is encoded and transmitted as metadata together with the content, or the decoder knows the actual size of the target screen with respect to a fixed reference screen size. The decoder warps the sound field in such a manner that all sound objects in the direction of the screen are compressed or stretched according to the ratio of the size of the target screen and the size of the reference screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.