US 11,921,198 B2
Apparatus for determining spatial positions of multiple audio sources
Mohammad Taghizadeh, Munich (DE); Michael Günther, Erlangen (DE); Andreas Brendel, Erlangen (DE); and Walter Kellermann, Erlangen (DE)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN); and FRIEDRICH-ALEXANDER-UNIVERSITÄT ERLANGEN-NÜRNBERG, Erlangen (DE)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN); and FRIEDRICH-ALEXANDER-UNIVERSITÄT ERLANGEN-NÜRNBERG, Erlangen (DE)
Filed on Jan. 24, 2022, as Appl. No. 17/582,837.
Application 17/582,837 is a continuation of application No. PCT/EP2019/069926, filed on Jul. 24, 2019.
Prior Publication US 2022/0163664 A1, May 26, 2022
Int. Cl. H04R 1/40 (2006.01); G01S 15/46 (2006.01); H04R 3/00 (2006.01)
CPC G01S 15/46 (2013.01) [H04R 1/406 (2013.01); H04R 3/005 (2013.01); G01S 2015/465 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An apparatus for determining a spatial position of an audio source in multi moving audio sources scenarios, the audio source being configured to transmit an audio signal, wherein the audio signal is emittable as a sound wave by the audio source, the apparatus comprising:
a plurality of audio signal inputs, wherein each audio signal input is configured to receive an audio signal version in the form of a local sound wave of the emitted sound wave; and
processing circuitry which is configured to:
determine a first probability for a direction of arrival of the audio signal version and a second probability for the direction of arrival of the audio signal version upon the basis of the plurality of the audio signal versions received within a first time interval, the direction of arrival being associated with a first spatial position relative to the apparatus;
determine a third probability for the direction of arrival of the audio signal version and a fourth probability for the direction of arrival of the audio signal version upon the basis of the plurality of the audio signal versions received within a second time interval, the direction of arrival being associated with a second spatial position;
determine a first probability difference between the first probability and the third probability;
determine a second probability difference between the second probability and the fourth probability;
combine the third probability and the first probability difference to obtain an updated third probability;
combine the fourth probability with the second probability difference to obtain an updated fourth probability; and
determine the certain spatial position upon the basis of the updated third probability and the updated fourth probability.