US 12,260,873 B2
Method and apparatus of noise reduction, electronic device and readable storage medium
Li Kang, Chongqing (CN)
Assigned to UNISOC (CHONGQING) TECHNOLOGIES CO., LTD., Chongqing (CN)
Filed by UNISOC (CHONGQING) TECHNOLOGIES CO., LTD., Chongqing (CN)
Filed on Jun. 27, 2022, as Appl. No. 17/850,936.
Application 17/850,936 is a continuation of application No. PCT/CN2020/086639, filed on Apr. 24, 2020.
Claims priority of application No. 201911368908.7 (CN), filed on Dec. 26, 2019.
Prior Publication US 2022/0328058 A1, Oct. 13, 2022
Int. Cl. G10L 21/0232 (2013.01); G10L 21/0216 (2013.01)
CPC G10L 21/0232 (2013.01) [G10L 2021/02165 (2013.01); G10L 2021/02166 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of noise reduction, wherein the method is applied to an electronic device, the electronic device comprises a first sound collector and a second sound collector, and installation positions of the first sound collector and the second sound collector are different, the method comprises:
acquiring a first sound signal collected by the first sound collector and a second sound signal collected by the second sound collector;
determining a desired sound signal and an interference sound signal based on the first sound signal and the second sound signal;
obtain a third sound signal by performing coherent noise elimination processing on the desired sound signal based on the interference sound signal; and
obtain a target sound signal by performing incoherent noise suppression processing on the third sound signal based on a probability of existence of a speech in the third sound signal;
wherein obtaining the third sound signal by performing the coherent noise elimination processing on the desired sound signal based on the interference sound signal comprises:
obtaining the third sound signal by calculating a difference between the desired sound signal and a product of the interfering sound signal and an adaptive filter coefficient;
wherein the (n+1)-th adaptive filter coefficient is obtained based on the n-th adaptive filter coefficient, an update step size, a variable update step size, a preset parameter and a conjugate correlation between the interference sound signal and the third sound signal, and the variable update step size changes with a change of a power ratio of the desired sound signal and the interference sound signal.