Patent ID: 9245516
Filing Date: 2016-01-26
CPC Classification: G10K,H04L

Claim Text:
1. A noise removal device which removes noise included in a signal, comprising: a statistical parameter calculation portion configured to calculate a parameter which expresses distribution of the noise based on the signal; and a noise removal portion configured to remove the noise from the signal by changing an element which relates to a process of removing the noise from the signal depending on the parameter which expresses the distribution of the noise; wherein the noise removal portion selects a noise removal method which is used to remove the noise from the signal based on the parameter which expresses the distribution of the noise; a noise reference sensor that is provided in a vicinity of a noise source which generates the noise in order to acquire a noise reference signal, wherein the statistical parameter calculation portion calculates the parameter which expresses the distribution of the noise, a parameter which expresses coherence between the signal and the noise reference signal, and a parameter which expresses stationarity of the noise based on the signal and the noise reference signal, and the noise removal portion selects the noise removal method which is used to remove the noise from the signal based on the parameter which expresses the distribution of the noise, the parameter which expresses the coherence, and the parameter which expresses the stationarity.