US 12,137,322 B2
Audio device with dual beamforming
Bolaji James Adesokan, Ballerup (DK); and Allan Mejlgren Von Bülow, Ballerup (DK)
Assigned to GN AUDIO A/S, Ballerup (DK)
Filed by GN Audio A/S, Ballerup (DK)
Filed on Sep. 28, 2022, as Appl. No. 17/936,017.
Claims priority of application No. 21199644 (EP), filed on Sep. 28, 2021.
Prior Publication US 2023/0098384 A1, Mar. 30, 2023
Int. Cl. H04R 3/00 (2006.01); H04R 1/40 (2006.01)
CPC H04R 1/406 (2013.01) [H04R 2201/40 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An audio device comprising an interface, memory, and a processor, wherein the processor is configured to:
obtain a first microphone input signal and a second microphone input signal;
process the first microphone input signal and the second microphone input signal for provision of an output audio signal;
determine a forgetting parameter based on the first microphone input signal and the second microphone input signal; and
output the output audio signal,
wherein to process the first microphone input signal and the second microphone input signal, the processor is further configured to:
determine a first set of covariance parameters based on the first microphone input signal and the second microphone input signal;
determine a second set of covariance parameters based on the first microphone input signal and the second microphone input signal;
determine a first beamforming based on the first set of covariance parameters and the second set of covariance parameters;
apply the first beamforming to the first microphone input signal and the second microphone input signal for provision of a first beamforming output signal;
determine a second beamforming based on the first set of covariance parameters and the second set of covariance parameters;
apply the second beamforming to the first microphone input signal and the second microphone input signal for provision of a second beamforming output signal;
provide the output audio signal based on the first beamforming output signal and the second beamforming output signal,
wherein the first beamforming is determined to increase a relative amount of speech of a user in the first beamforming output signal and wherein the second beamforming is determined to decrease a relative amount of speech of the user in the second beamforming output signal; and
update at least one of the first covariance parameters or the second covariance parameters based on the forgetting parameter.