Patent · US Active

Method and apparatus for changing the relative positions of sound objects contained within a Higher-Order Ambisonics representation

US9338574B2 · kind B2 · utility

31Cited by

8References

14Claims

0Family size

Assignee

Thomson Licensing · FR

Inventors

Peter Jax · Hannover, DE
Johann-Markus Batke · Hannover, DE

Key dates

Filing date	Jun 15, 2012
Grant date	May 10, 2016
Priority date	—
Expiry date	Aug 15, 2032

Classification

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

Abstract

Higher-order Ambisonics HOA is a representation of spatial sound fields that facilitates capturing, manipulating, recording, transmission and playback of complex audio scenes with superior spatial resolution, both in 2D and 3D. The sound field is approximated at and around a reference point in space by a Fourier-Bessel series. The invention uses space warping for modifying the spatial content and/or the reproduction of sound-field information that has been captured or produced as a higher-order Ambisonics representation. Different warping characteristics are feasible for 2D and 3D sound fields. The warping is performed in space domain without performing scene analysis or decomposition. Input HOA coefficients with a given order are decoded to the weights or input signals of regularly positioned (virtual) loudspeakers.

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