Patent · US Active

Method and apparatus for compressing and decompressing a Higher Order Ambisonics representation for a sound field

US9646618B2 · kind B2 · utility

7Cited by

0References

15Claims

0Family size

Assignee

Dolby Laboratories Licensing Corporation · US

Inventors

Alexander Krueger · Burgdorf, DE
Sven Kordon · Wunstorf, DE
Johannes Boehm · Göttingen, DE

Key dates

Filing date	Dec 4, 2013
Grant date	May 9, 2017
Priority date	—
Expiry date	Dec 4, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04S2420/11
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The invention improves HOA sound field representation compression. The HOA representation is analyzed for the presence of dominant sound sources and their directions are estimated. Then the HOA representation is decomposed into a number of dominant directional signals and a residual component. This residual component is transformed into the discrete spatial domain in order to obtain general plane wave functions at uniform sampling directions, which are predicted from the dominant directional signals. Finally, the prediction error is transformed back to the HOA domain and represents the residual ambient HOA component for which an order reduction is performed, followed by perceptual encoding of the dominant directional signals and the residual component.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.