US 12,067,991 B2
Packet loss concealment for DirAC based spatial audio coding
Guillaume Fuchs, Erlangen (DE); Markus Multrus, Erlangen (DE); Stefan Döhla, Erlangen (DE); and Andrea Eichenseer, Erlangen (DE)
Assigned to Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Munich (DE)
Filed on Dec. 2, 2021, as Appl. No. 17/541,161.
Application 17/541,161 is a continuation of application No. PCT/EP2020/065631, filed on Jun. 5, 2020.
Claims priority of application No. 19179750 (EP), filed on Jun. 12, 2019.
Prior Publication US 2022/0108705 A1, Apr. 7, 2022
Int. Cl. G10L 19/005 (2013.01); G10L 19/008 (2013.01); H04R 1/32 (2006.01)
CPC G10L 19/005 (2013.01) [G10L 19/008 (2013.01); H04R 1/32 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for loss concealment of spatial audio parameters, the spatial audio parameters comprising at least a direction of arrival information, the method comprising:
receiving a first set of spatial audio parameters comprising at least a first direction of arrival information;
receiving a second set of spatial audio parameters, comprising at least a second direction of arrival information; and
replacing the second direction of arrival information of a second set by a replacement direction of arrival information derived from the first direction of arrival information, if at least the second direction of arrival information or a portion of the second direction of arrival information is lost or damaged,
wherein replacing comprises dithering the replacement direction of arrival information; and/or wherein replacing comprises injecting random noise to the first direction of arrival information to acquire the replacement direction of arrival information;
wherein injecting is performed, if a first or second diffuseness information indicates a high diffuseness; and/or if a first or second diffuseness information is above a predetermined threshold for the diffuseness information.