US 11,996,077 B2
Noise estimation device, moving object sound detection device, noise estimation method, moving object sound detection method, and non-transitory computer-readable medium
Sakiko Mishima, Tokyo (JP); and Reishi Kondo, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/632,940
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Aug. 8, 2019, PCT No. PCT/JP2019/031444
§ 371(c)(1), (2) Date Feb. 4, 2022,
PCT Pub. No. WO2021/024471, PCT Pub. Date Feb. 11, 2021.
Prior Publication US 2022/0293081 A1, Sep. 15, 2022
Int. Cl. G10K 11/178 (2006.01)
CPC G10K 11/17833 (2018.01) 19 Claims
OG exemplary drawing
 
1. A noise estimation device comprising:
hardware, including at least one processor and memory;
frequency analysis processing unit, implemented by the hardware, configured to receive an input of an observation signal that includes a moving object sound output from a moving object and noise and transforming the observation signal into a feature in each of time-frequency domains;
noise range estimation unit, implemented by the hardware, configured to estimate a first feature in a first time-frequency domain to which only the noise belongs based on acoustic characteristic information of the moving object sound and the feature; and
amount-of-noise estimation unit, implemented by the hardware, configured to estimate an amount of noise in a second time-frequency domain to which the moving object sound belongs based on the first feature.